Element X decays radioactively with a half life of 6 minutes. If there are 260 grams of Element X, how long, to the nearest tenth of a minute, would it take the element to decay to 113 grams

Answers

Answer 1

Answer:

7.2 minutes

Step-by-step explanation:

The formula to find the time using the radioactive decay rate formula is given as:

t = t½ × In(Nt/No)/-In2

Where

t½ = half life = 6 minutes

No = Initial Amount = 260 grams

Nt = Amount after decay

= 113 grams

Hence:

t = 6 × In(113/260)/-In2

t = 7.2131331036796 minutes

Approximately = 7.2 minutes


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4

Step-by-step explanation:

Calculate the area of trapezium CDEF.

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Step-by-step explanation:

1/2×(9+5)×6

1/2×14×6

7×6

42cm2

The points in the table lie on a line. Find the slope of the line. helppp pls and if you can explain how u did it thank you

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The slope is 2/5
Use these coordinates
(-3,0) & (12,6)

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Answer:

where is the question though

Step-by-step explanation:

Answer:

what

Step-by-step explanation:

Please answer quick 20 points and if answer is right I will give Brainly

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Answer:

216*64/8=1728....

Step-by-step explanation:

12³ is the appropriate answer

its all on the picture.

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Answer:

B!

Step-by-step explanation:

By the way, you named this as Mathematics... This is science but, the answer is B.  

Answer:

Water carbon dioxide and oxygen.

Step-by-step explanation:

Its all in the picture. It labels the substances used in the cycle.

70.50 - 52.01 - 0.22 =
Help I got it wrong and I dont know how to do the problem

Answers

ok so first 70.50-52.01= 18.49 - .22= 18.27

Answer:

18.27

Step-by-step explanation:

70.50-52.01- 0.22

18.49-0.22

18.27

is it possible to draw a triangle with numbers 5,6,11

Answers

Answer:

No

Step-by-step explanation:

Let's use the Pythagorean Theorem. For those of you that don't know, it is [tex]a^2 + b^2 = c^2\\[/tex].  

11 is the bigger side in this case, so our formula would go like this: [tex]5^2 + 6^2 = 11^2\\[/tex].

We now calculate to see if this is true.

25 + 36 [tex]\neq[/tex] 121

Therefore, the answer is wrong.

i’ll give u brainliest!!
what are the areas for shape 1,2 and 3

Answers

Answer:

I think it is

1: 22.37

2:16.81

3:83.16

Step-by-step explanation:

Answer:

Shape 1: 22.365

Shape 2: 16.81

Shape 3: 83.16

Step-by-step explanation:

I'm going to start with 2, because its the easiest shape to do, which is 4.1*4.1= 16.81. Next is 3, which you find the length by adding 4.1 to 9.1 = 13.2. You then multiply 13.2 by 6.3 = 83.16. Finally for shape 1, you first find the bottom shape,  which you do by dividing 6.3 by 2 so you can get the width of half the triangle. That is 3.15. then you multiply that by 7.1 to get the area of 22.365.

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The table below shows measurement conversions between cups and ounces.


1 .Let x represent the number of cups and y represent the number of ounces. Write an equation that represents this relationship.

Answers

Answer: y = 8x

3 x 8 = 24

5 x 8 = 40

8 x 8 = 64

I'm also struggling this problem too​

Answers

Answer:

21 6

7 2

14 4

Step-by-step explanation:

not sure |•-•|

It would be 7=2 because 21/5=3.5 and 7/x=3.5 would be 2
14=4 because x/4=3.5 is 14

Hope this helps

Have a great day/night

HELP PlZ DUE in 30 MIN
m∠6 =

Answers

Answer:

Angle 6 is 47°

Step-by-step explanation:

In a right triangle, the length of one leg is 20 units. The length of the other leg is 12 units. What is the length of the hypotenuse?

Answers

The required measure of the hypotenuse length is √544. Option D is correct.

In a right triangle, the length of one leg is 20 units. The length of the other leg is 12 units.

What are Pythagorean triplets?  

In a right-angled triangle, its side, such as hypotenuse, perpendicular, and base is Pythagorean triplets.

Here,
Apply Pythagoras' theorem,
(hypotenuse)² = sum of the square of the legs,
(hypotenuse)² = 20² + 12²
(hypotenuse)²  = 544
hypotenuse = √544

Thus, the required measure of the hypotenuse length is √544. Option D is correct.

Learn  more about Pythagorean triplets here:

brainly.com/question/22160915

#SPJ2

To solve the equation 2−5(3+4x)=2x+7, Miranda's first step was to write 2−15−20x=2x+7. Which property did Miranda use in her first step?

Answers

Answer:

Step-by-step explanation:

distributive

What is a real solution and examples of real solutions

Answers

Answer:

A real solution in algebra is simply a solution to an equation that is a real number.

for example

If y>0, then x2 = y has two real solution or roots. x = ±√y

If y=0, then x2 = y has one real solution.

George wants to rent a car for a road trip with his friends. He checked the rentals with two companies. Company A charges a non-refundable fee of $50 and then also $150 for each day. Company B charges using the function 50(2+1). Compare the two functions. Which function has a great rate of change?

Answers

Answer:

Company A has a greater daily rate

Step-by-step explanation:

Given

Company A

[tex]Base\ Charges=\$50[/tex]

[tex]Daily\ Rate = \$150[/tex]

Company B

[tex]f(x) = 50(2x +1)[/tex]

Required

Determine the company with greater rate

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[tex]f(x) = 50 * 2x + 50 * 1[/tex]

[tex]f(x) = 100x + 50[/tex]

In a linear function:

[tex]f(x) = mx + b[/tex]

m represents the rates.

This implies that the rate of company B is:

[tex]Rate =100[/tex]

and the rate of company A is

[tex]Daily\ Rate = \$150[/tex]

By comparison:

Company A has a greater daily rate

Which sequence explains a geometric method of determining StartFraction 3 minus 17i Over 2 + 2 I EndFraction ?

Answers

You’re gonna have to take a picture, I can’t understand

i will mark brainlist if right!!!

Answers

Step-by-step explanation:

b2 =5

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Help with this please

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The 2nd one I think I hope the helps

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Answers

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(-3, -7). 1/7 what is the equation in point slope form

Answers

Answer:

y+7 = 1/7(x+3)

Step-by-step explanation:

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3
5 of the apples are bad.
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Answers

35 apples are still good

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Answers

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Is 2x + 3 +7x equivalent to the expression 2(x+3) + 7x?

Answers

Answer:

No

Step-by-step explanation:

because if you use distribution on 2(x+3)+7x it gives you 2x+6=7x which does not equal 2x+3+7x

Solve the following quadratic equation by factorising first x^2 + 5x - 14 =0

Answers

Answer:

Step-by-step explanation:

Here you go mate

step 1

x^2+5x-14=0  equation/Question

step 2

x^2+5x-14=0  factor by setting them equal to zero

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1 hay bale = 16" X 16" X 44"

The trailer is 28' long, 8' wide, and the hay can be stacked 8' high.



How many bales can the trailer transport?

Answers

Answer:

25 Haybales

Step-by-step explanation:

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Answers

Answer:

It may be R and S yet or not

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Answer:

Step-by-step explanation:

Sorry for the bad handwriting :(

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Answer:

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Step-by-step explanation:

-2(5) + 2

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Answer:

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Step-by-step explanation:

Answer:

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Step-by-step explanation:

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