How much of a radioactive kind of nitrogen will be left after 30 minutes if you start with 1,920 grams and the half-life is 10 minutes?

Answers

Answer 1
the answer is 1.92!!

1,920/10= 192
192/10= 19.2
19.2/10= 1.92

10+10+10= 30

Related Questions

5. How many ways are there to distribute 10 indistinguishable candies among 4 different
children? Children may end up with no candies.
PLSSSSS HELP IT IS EXTREMELY URGENT PLSSSS

Answers

By application of the combination formula, there are 210 ways for distributing 10 indistinguishable candies among 4 children.

What is combination?

Combination is the arrangement of objects in which order is not taken into account.

The applicable formula is:

n combination r = n!/[(n - r)!r!]

where n is the number of indistinguishable items (10 candies), and r is the possible number of recipients (4 kids).

Hence;

10 combination 4 = 10!/[(10 - 4)!4!] ways

10 combination 4 = 10!/(6! × 4!) ways

10 combination 4 = (10 × 9 × 8 × 7 × 6!)/(6! × 4 × 3 × 2 × 1) ways

10 combination 4 = 10 × 3 × 7 ways

10 combination 4 = 210 ways

Therefore, there are 210 ways for the 10 indistinguishable candies to be distributed among the 4 children by with the application of combination formula.

Learn more about combination here: https://brainly.com/question/11732255

#SPJ1

Triangle ABC is congruent to triangle XYZ. In AABC, AB = 12 cm and AC = 14 cm. In AXYZ, YZ = 10 cm and XZ = 14
!
cm.

Answers

The perimeter of triangle ABC that is congruent to triangle XYZ is: 36 cm.

What are Congruent Triangles?

Triangles that are congruent to each other have corresponding side lengths that have the same lengths that are equal to each other.

What is the Perimeter of a Triangle?

The sum of all the three sides of a triangle is equal to the perimeter of the triangle.

Since triangle ABC is congruent to triangle XYZ, their corresponding side lengths will also be congruent to each other. That is, they will have the same lengths.

Therefore:

Side AB = side XY = 12 cm [corresponding congruent sides]

Side AC = side XZ = 14 cm [corresponding congruent sides]

Side BC = side YZ = 10 cm [corresponding congruent sides]

Find the perimeter of triangle ABC by adding all three triangles together.

Perimeter of triangle ABC = side AB + side AC + side BC

Perimeter of triangle ABC = 12 + 14 + 10

Perimeter of triangle ABC = 36 cm

Learn more about congruent triangles on:

https://brainly.com/question/2938476

#SPJ1

The sum of an integer and 6 times the next consecutive odd integer is 61. Find the
value of the lesser integer.

Answers

If the sum of an integer and 6 times the next consecutive integer is 61, the the value of lesser integer is 7

Consider the first odd integer as x

Then the next consecutive odd integer = x+2

The 6 times the second integer=  6(x+2)

= 6x+12

Sum of an integer and 6 times the next consecutive odd integer is 61

Then the equation will be

x + 6x+12 = 61

Add the like terms in the equation

(1+6)x + 12 = 61

7x +12 = 61

Move 12 to the right hand side of the equation

7x = 61-12

7x = 49

x = 49/7

x = 7

The second number is

x+2 = 7+2

= 9

Hence, if the sum of an integer and 6 times the next consecutive integer is 61, the the value of lesser integer is 7

Learn more about equation here

brainly.com/question/28741857

#SPJ1

2) m angle2=x+88 50° 2 A) -8 C) 8 B) -7 D) 7

Answers

A

1) Since the sum of the interior angles of any triangle is 180º, and this is an isosceles triangle

2) Then the other angle, has the same measure 50º since this is an isosceles triangle, at least two congruent sides, and two congruent angles.

We can finally write

x+88 +50 +50 = 180

x +188 =180 subtract 188 from both sides

x= 180-188

x= -8

3) So x=-8 is the answer.

Please help thank you

Answers

The value of the unknown angle in the triangle is as follows;

m∠S = 40 degrees

How to find the angle of a triangle?

The exterior angle theorem states that the measure of an exterior angle of a triangle is greater than either of the measures of the remote interior angles.

In other words,  an exterior angle of a triangle is equal to the sum of the two opposite interior angles.

The external angle is ∠JRS.

Therefore, m∠S can be found as follows:

∠JRS = m∠S + m∠T

Hence,

m∠S  = 3x + 4

m∠T = 8x + 4

∠JRS = 140°

Hence,

140 = 3x + 4 + 8x + 4

140 = 3x + 8x + 4 + 4

140 = 11x + 8

140 - 8 = 11x

132 = 11x

x = 132 / 11

x = 12

Therefore,

m∠S  = 3(12) + 4 = 40 degrees.

learn more on angle and triangle here:https://brainly.com/question/25950519

#SPJ1

juan went out to eat dnner,and the meal cost $60.00.If juan recived a 18% discount,what was the total value of the discount

Answers

Multiply by the decimal form of the percentage,

60 * 0.18 = 1.08

So the discount is for $1.08 off,

60 - 1.08 = 58.92

Giving a total of $58.92 after the discount is applied

The perimeter of a rectangle is 82 cm the length is 1 cm more than three times the width find the length and the width of the rectangle

Answers

The length will then be L = 18(41/19) = 738/19 cm.

As a check, the area should be A = LW = (738/19)(41/19) = 30258 cm2

sorry if this isn't much help but i had a similar problem once and i used the same steps for your question

24. The temperature in ° F on 20 days during the month of June
was as follows:
70° F, 76° F,
74° F, 74° F,
76° F,
78° F,
74° F,
76° F,
70° F, 70° F, 72° F,
78° F, 76° F,
74° F,
74° F, 78° F, 80° F,
80° F, 76° F
78° F

What is the mode of temperature for the month of June?

Answers

it’s between 74 and 76

DS
6) You and five friends went out to a movie. You all
shared a large tub of popcorn that cost $16.50,
and you ordered individual boxes of candy that
cost $3,72 per person. You and your friends decide
to split the bill evenly. How much did each of you
pay?

Answers

Answer:

You would each pay $6.42

Have a good one!

WILL GIVE BRAINLOST TO BEST QUSTION

The cost of a ride in a taxi is $4 for the first half-mile plus a constant amount per half-mile after that. The sequence below shows the pattern of numbers that appear on the driver's screen.

2.50, 2.75, 3, 3.25, 3.50,...

Which of the following is the Recursive Function that can be used to determine f(x), the cost in dollars, for a ride in the tax of, x. half miles?

Answers

Answer:

I don't know men iam grade 7 student

oan, omb, apb and mpn are straight lines and an = 3oa. m is the midpoint of ob. oa = a ов = b ap = kab where k is a scalar quantity. express ab and mn in terms of a and b. express mp in terms of a, b and k. finally, find the value of k.

Answers

The values of the vectors obtained from the vector diagram are;

[tex]\overrightarrow{AB} = - a + b[/tex]

[tex]\overrightarrow{MN} = ( -2\cdot a + 0.5 \cdot b)[/tex]

[tex]\overrightarrow{MP} = ( -0.5\cdot b + a+ K \cdot ( - a + b)[/tex]

K = 2.5

What is a vector in geometry?

A vector can be expressed as a line segment that has a direction.

The given parameters are;

The straight lines are; OAN, OMB, APB, and MPN

AN = 3•OA

The midpoint of OB = M

The vectors

[tex] \overrightarrow{OA} = a[/tex]

[tex] \overrightarrow{OB} = b[/tex]

[tex]\overrightarrow{AP} = K \cdot \overrightarrow{AB} [/tex]

From the question diagram, we have;

[tex]\overrightarrow{AB} = - a + b[/tex]

[tex]\overrightarrow{AP} = K \cdot ( - a + b)[/tex]

[tex]\overrightarrow{MN} = ( -2\cdot a + 0.5 \cdot b)[/tex]

[tex]\overrightarrow{AN} [/tex] = 2•a

[tex]\overrightarrow{NP} = \overrightarrow{AP} - \overrightarrow{AN} [/tex]

[tex]\overrightarrow{NP} = -2\cdot a + K \cdot ( - a + b)[/tex]

[tex] \overrightarrow{MB} = 0.5 \cdot b[/tex]

[tex]\overrightarrow{PB} = -a + b - K \cdot ( - a + b)[/tex]

[tex]\overrightarrow{MP} =0.5 \cdot b - -a + b - K \cdot ( - a + b) = ( -0.5\cdot b + a+ K \cdot ( - a + b)[/tex]

[tex]\overrightarrow{MP} = ( -0.5\cdot b + a+ K \cdot ( - a + b)[/tex]

Given that we can write;

[tex]x \cdot \overrightarrow{NP} = \overrightarrow{NM}[/tex]

x × (-2•a + k•(-a + b)) = -3•a + 0.5•b

-2•x•a - k•x•a + x•k•b = -3•a + 0.5•b

Which gives;

-2•x - k•x = -3...(1), and x•k = 0.5...(2)

From (2), x = 0.5÷k

From (1), -2×(0.5÷k) - k×(0.5÷k) = 3

-k - 0.5 = -3

-k = -3 + 0.5 = -2.5

k = 2.5

Learn more about vectors here:

https://brainly.com/question/24855749

#SPJ1

insert parentheses to make the expression true
4×2+3×2=32

Answers

Answer:

4 * ( 2 + 3 * 2) = 32

Step-by-step explanation:

The strategy I used in this question is generally trial and error. The most important thing here to remember is to follow the order of operations. If you think a little out of the box, then you will see the answer. To solve, first multiply 3*2, then add two, which should result in 8. 4*8 is 32, which makes the equation true.

The area of a square is 144 square meters. What is the length (in meters) of one side of the square?

Answers

Answer:

12 m

Step-by-step explanation:

area = (side)²

(side)² = area

√(side)² = √(area)

side = √(area)

side = √(144 m²)

side = 12 m

the population of a city will quadruple in 15 years. if its current population is 6,000, using the given rate of change, what will its approximate population be 7 years from now

Answers

Answer:

11200

Step-by-step explanation:

determine the equation of line from the graph

Answers

Answer:

y = 2x

Step-by-step explanation:

The slope is 2.  Find a point on the line, to go back to the line, go up two and one to the right.  You will be back on the line.  This pattern repeats over and over and again.

Select the correct answer.

What is the range of the function shown on the graph above?
A. -9 [tex]\leq[/tex] y [tex]\leq[/tex] 8
B. -7[tex]\leq[/tex] y [tex]\leq[/tex] -2
C.-8[tex]\leq[/tex] y [tex]\leq[/tex] 8
D.-2 [tex]\leq[/tex] y [tex]\leq[/tex] -7

Answers

Answer:

A

Step-by-step explanation:

The range is the y values.  The y value is as low as -10 and as high as 8.

I need help with this practice I attempted this and got 13.96? Make sure your answer is rounded to the nearest hundredth

Answers

Law of Cosines

Given two side lengths a and b of a triangle and the angle included by them θ, the length of the third side can be calculated as:

[tex]c^2=a^2+b^2-2ab\cos \theta[/tex]

We have a = 14, b = 9, θ = 71°. Substituting:

[tex]\begin{gathered} c^2=14^2+9^2-2\cdot14\cdot9\cos 71^o \\ c^2=196+81-252\cdot0.325568 \\ c^2=194.956825 \\ c=\sqrt[]{194.956825} \\ c=13.96 \end{gathered}[/tex]

The length of CD is 13.96

Hello I am not sure for what to do for the end of the equation.

Answers

ANSWER

25

EXPLANATION

We are given that p and q intersect to form <1 and <2 that are adjacent.

Let us represent that with a diagram:

We have that <1 and <2 are supplementary.

This means that they add up to 180 degrees.

So:

<1 + <2 = 180

4x - 3 + 3x + 8 = 180

Collect like terms:

4x + 3x + 5 = 180

7x = 180 - 5

7x = 175

x = 175 / 7

x = 25

That s the value of x for which <1 and <2 are supplementary.

Find the measures of the complementary angles that satisfy each case. The measure of the first angle is 40% less than the measure of the second.

Answers

The measure of the angles are 56.25° and 33.75°.

How to calculate the angles?

The value in a complementary angle is equal to 90°.

Let the first angle = x

The second angle will be: 1 - (40% × x) = 1 - 0.4x = 0.6x

Therefore, they'll be added together as follows:

x + 0.6x = 90°

1.6x = 90°

Divide

x = 90/1.6

x = 56.25

The second angle will be:

= 0.6x

Since x = 56.25, this will be used in the illustration below.

= 0.6x

= 0.6 × 56.25

x = 33.75

Therefore, the second angle is 33.75.

This illustrates the concept of complimentary angles.

Learn more about angles on:

brainly.com/question/25716982

#SPJ1

FInd the probability that a student walks to school

Answers

The probability that a student walks to school is 7/15

How to determine the probability of walking to school?

The tree diagram represents the given parameter

From the tree diagram, we have the following parameters

P(Rain) = 2/5

P(Rain and walk) = 1/6

P(No rain) = 3/5

P(No rain and walk) = 2/3

The probability of walking to school is then calculated as

P = P(Rain) x P(Rain and walk) + P(No rain) x P(No rain and walk)

Substitute the known values in the above equation

So, we have

P = 2/5 x1/6 + 3/5 x 2/3

Evaluate the products

P = 1/15 + 6/15

Evaluate the sum

P = 7/15

Hence, the probability is 7/15

Read more about probability at

https://brainly.com/question/24756209

#SPJ1

Need help with #6 don’t know how to find truth values.

Answers

The statement p is: Saturn is a planet.

The statement q is: Hong Kong is a city.

Now the first part of our composite proposition is:

[tex]p\lor\sim q[/tex]

This means that we have to negate the statement q, this would be: Hong Kong is not a city.

Now we make the disjunction between the statement p and the negation of q, then we have:

[tex]p\lor\sim q\text{ means: Saturn is a planet or Hong Kong is not a city}[/tex]

The second part of our composite porposition is:

[tex]\sim p\wedge q[/tex]

This means that we have to negate the statement p, then we have: Saturn is not a planet. Then we make the conjunction between the negation of p and q, then we have:

[tex]\sim p\wedge q\text{ means: Saturn is not a planet and Hong Kong is a city}[/tex]

Finally we make the disjunction between the statements discussed so far, hence the statament

[tex](p\lor\sim q)\lor(\sim p\wedge q)[/tex]

means:

Saturs is a planet or Hon kong is not a city OR Saturn is not a planet and Hong Kong is not a city.

Now, to determine the truth value of the composite proposition we have to remember that a disjunction is TRUE if one of the statements that make it is true and that the conjunction is TRUE only if both stataments that make it are true.

The first statement is: Saturn is a planet or Hong kong is not a city. Since this is a disjunction and the statement Saturn is a planet is TRUE, then the proposition is true.

The second statement is: Saturn is not a planet and Hong Kong is not a city. Since this is a conjunction and the statement Saturs is not a planet is FALSE, the the second statement is FALSE.

Now since the composite statemtent is made of a TRUE and a FALSE statement and it is a disjunction we conclude that the truth value of the statement given is TRUE.

Every rational number is positive.
A. True
B. False

Answers

Answer:

Step-by-step explanation: it is true because when the numerator and denominator both are positive integers both are negative integers it is a positive rational number.

help me please help :)

Answers

Step-by-step explanation:

12/4 = x/8

1st: cross multiply

96 = 4x

2nd: divide both sides by 4

96/4 = 4x/4

therefore x = 24

Solven - 8 + n = 1 -4n

Answers

We will solve as follows:

[tex]n-8+n=1-4n\Rightarrow2n+4n=1+8[/tex][tex]\Rightarrow6n=9\Rightarrow n=\frac{3}{2}[/tex]

The graphs of the fuctions f and g are shown below, find all values of x for which f(x) < g(x). 30 points!!!

Answers

Answer: [tex]-10 < x < 0, x > 12[/tex]

Step-by-step explanation:

[tex]f(x) < g(x)[/tex] when the graph of [tex]f(x)[/tex] is below the graph of [tex]g(x)[/tex].

Add −1 3/10+2/5 using the number line.

Select the location on the number line to plot the sum.

Answers

The location on the number line to plot the sum of the given number is shown in the image attached below.

What is a number line?

In Mathematics, a number line simply means a type of graph with a graduated straight line which comprises both positive and negative numbers that are placed at equal intervals along its length.

This ultimately implies that, a number line primarily increases in numerical value towards the right and decreases in numerical value towards the left.

Note: Each interval on this number line represents 1/10.

Next, we would add the given numbers together as follows:

Number = −1 3/10 + 2/5

Number = −13/10 + 2/5

Number = (-13 + 4)/10

Number = -9/10 or -0.9.

Therefore, the sum would be located between -4/5 and -1.

Read more on number line here: brainly.com/question/17325155

#SPJ1

Hey , I have a quick question about a Homework in math I got confused on how to solve the listed to formula [tex] \frac{x - 3}{2} - 4 \ \textless \ \frac{x}{3} [/tex]

Answers

Solution

- The question would like us to solve the following

[tex]\frac{x-3}{2}-4<\frac{x}{3}[/tex]

- The solution is outlined below:

[tex]\begin{gathered} \frac{x-3}{2}-4<\frac{x}{3} \\ \\ Collect\text{ like terms:} \\ Add\text{ 4 to both sides and Subtract }\frac{x}{3}\text{ from both sides} \\ \\ \frac{x-3}{2}-\frac{x}{3}<4 \\ \\ We\text{ need the LCM of 2 and 3. } \\ The\text{ LCM is }2\times3=6 \\ \\ Thus,\text{ multiply both sides by 6 in order to remove the denominator} \\ 2\frac{}{} \end{gathered}[/tex][tex]\begin{gathered} 6\left(\frac{x-3}{2}\right?-6\left(\frac{x}{3}\right?<4\times6 \\ \\ 3\left(x-3\right)-2x<24 \\ Expand\text{ the bracket} \\ 3x-9-2x<24 \\ x-9<24 \\ Add\text{ 9 to both sides} \\ x<33 \end{gathered}[/tex]

Final Answer

The answer is x < 33

Question 1

A triangle has sides of length 2 cm, 8 cm and 9 cm.
Calculate the value of the largest angle in this triangle.

Answers

Answer: You have to use a calculator

Step-by-step explanation:

18128.2718128.2718128.2718128.2718128.2718128.2718128.2718128.2718128.2718128.2718128.2718128.2718128.2718128.2718128.2718128.2718128.2718128.2718128.2718128.2718128.2718128.2718128.2718128.2718128.2718128.2718128.2718128.2718128.2718128.2718128.2718128.2718128.2718128.2718128.2718128.2718128.2718128.2718128.2718128.2718128.2718128.2718128.2718128.2718128.2718128.2718128.2718128.2718128.2718128.2718128.2718128.2718128.2718128.2718128.2718128.2718128.2718128.2718128.2718128.2718128.2718128.2718128.27

it is known that a certain kind of algae in the dead sea can double in population every 4 days. suppose that the population of algae grows exponentially, beginning now with a population of 3,000,000. (a) how long it will take for the population to quadruple in size? days (b) how long it will take for the population to triple in size? days

Answers

Since the algae grow exponentially with doubling time of 4 days, then the population will be quadruple in size in 8 days and will be triple in size in  6.34 days.

The easiest way is to consider the situation as a geometric sequence. If the population doubles its size in 4 days, then it will be quadruple in:

2 x 4 days = 8 days.

In general, we can use the growth formula:

P(t) = Po . 2^(t/Td)

Where:

P(t) = population at time t

Po = initial population

Td = doubling time

Parameters given:

Td = 4 days

P(t) = 3Po

Plug those parameters into the formula:

3 Po = Po . 2^(t/4)

3 = 2^(t/4)

log 3 = (t/4) log 2

t = 4 . log 3 / log 2 = 6.34 days.

Learn more about growth formula here:

https://brainly.com/question/27161222

#SPJ4

At 6:00 A.M. the temperature was 5°F below zero. At noon the temperature was 2°F above zero. At 6:00 P.M. the temperature was 7°F above zero. Which equation shows the change in temperature from 6:00 A.M. to 6:00 P.M.?

A. |5 – 7| = |–2| = 2°F

B. |2 – 7| = |–5| = 5°F

C. |–5 – 2| = |–7| = 7°F

D. |–5 – 7| = |–12| = 12°F

Answers

Based on the temperature at 6:00 am and the temperature at 6:00pm, the change in temperature can be shown by the formula D. |–5 – 7| = |–12| = 12°F.

How to find the change in temperature?

To find the change in temperature, you need to subtract the temperature at 6: 00 pm from the temperature at 6: 00 am.

The change in temperature is therefore:

= | temperature at 6 am - temperature at 6pm |

= | -5 - 7 |

= | - 12 °F|

The absolute value of - 12 °F is 12 °F which was therefore the change in temperature.

Find out more on change in temperature at https://brainly.com/question/27988898

#SPJ1

Other Questions
In the figure below fg = 18 and gh= 19 find fh why is height more specific measure than 'size'? I inserted a picture of the question, please give a VERY SHORT explanation A string with both ends fixed is vibrating in its second harmonic. The waves have a speed of 36m/s and a frequency of 60Hz. The amplitude of the standing wave at an antinode is 0.6cm. calculate the amplitude of the motion of points on the string a distance of 30cm,15cmand 7.5cm on the left hand end of the string. In the planning stage of writing your essay, which question should you answer first?How many paragraphs do I need to write?What can I use for my hook?What is the prompt asking me to address?How many words does the essay need to be? Figure R = figure R". Describe a sequence of three transformations you canperform on figure R to show this. Show your work. ASAP!!!! Do you think service should always happen in person or is dropping off the paperwork okay? What should happen to those who refuse to receive a summons? Defend your answer help please i will give brainliest and 80 points!! scientists are testing a transparent material whose index of refraction for visible light varies with wavelength as , where is in nm. if a 295-nm-thick coating is placed on glass for what visible wavelengths will the reflected light have maximum constructive interference? In the following expression, place a decimal point in the divisor and the dividend that is 43686208 to create a new problem with the same answer as in question 11 that is 7 meters / 7 Which points are on the graph of y = cot x? (Select all that apply)A. (/3 , 3/2)B. (/2 , 0)C. (0 , )D. (/4 , 1)E. ( , 0) Four masses are arranged as shown. They are connected by rigid, massless rods of lengths 0.780 m and 0.500 m. What torque must be applied to cause an angular acceleration of 0.750 rad/s2 about the axis shown? determine the area of the shaded regionA. 6 square unitsB. 19 square unitsC.20 square unitsD. 25 square units Aaron has a smart phone data plan that costs $40 per month thatincludes 6 GB of data, but will charge an extra $25 per GB over theincluded amount. How much would Aaron have to pay in a monthwhere he used 3 GB over the limit? How much would Aaron have topay in a month where he used went over by x GB?Total cost when over by 3 GB:Total cost when over by x GB:Pls give me correct answer I need it or else I fail the two important accounting issues related to self-constructed assets are multiple choice question. interest charges and date placed in service. historical cost and useful life. allocation of overhead and depreciation rates. interest charges and allocation of overhead. How did china's Golded age lead in increase of trades a water tank is to contain 2,000 liters of water it is constructed to be 4 meters long and 1.5 meters wide. find the height of the tank. Darell made a scale drawing of a shopping center. The parking lot is 4 centimeters wide in the drawing. The actual parking lot is 40 meters wide. What scale did Darell use? PLEASE HELP!!!!When Americans cast their votes for a president, they are really electing members of [ Select ] . These people then [ Select ] . p and q are roots of the equation 5x^2 - 7x +1. find to value of p^2 x q +q^2 x p and (p/q)+(q/p)