The half-life of radon is 385 days. What fraction of a sample with no atoms remains at the end of 77 days?​

Answers

Answer 1

Step-by-step explanation:

calculate the missing angle 'a'

Answer 2

9:57

Answer

Hence in 77 days 107. will decay Remain = 90%

Explanation

Given: half life = 385 half-life

To find: what fraction remains after 22 days

Solution.

Let total amount = 100%.

time taken for decaying Si%. = 385

In time of 72 days = 305 77

= 5

→ Remarwiny = 50 = 10%.

Hence in 72 days 1-7. will decay Remain = 90%.


Related Questions

Evaluate x^3-3y when x=-3 and y=4

Answers

Answer:

If you would like to solve x^3 - 3 * y when x = - 3 and y = 4, you can do this using the following steps:

x = - 3

y = 4

x^3 - 3 * y = (-3)^3 - 3 * 4 = -27 - 12 = - 39

The correct result would be A -39.

Step-by-step explanation:

pa answer PO Ng question ko plss BRAINLYES Naman dyan

Find the value of x.

Answers

Sum of two interior angles=Exterior angle

44°+9x+3=14x+79x+47=14x+747=5x+75x=47-75x=40x=5

8
11 Juan is multiplying 68 x 73 using the area model method

One of the partial products is missing.
What number should juan write in the blank space in the model above?
A 420
B 42,000
C 4,200
D 130

Answers

Answer:

C 4,200

Step-by-step explanation:

THE FIRST ANSWER I PUT WAS INCORRECT 70 TIMES 60 = 4,200 because 70 has one 0 and 60 has one 0 use that as a strategy so there's two 0,s when you combine it and its at the end of 4,200 so sice 6 times 7 or 7 times 6 = 42 put the two 0,s at the end and add it to 42 then you get 4,200 or 4200 you don't have to put the comma but it helps let you know 4,000 is part of the thousands and lets you know to seperate it from the hundreds so it's better to add the comma if you want to if you don't want to then it's okay but you might get a answer wrong without a comma so the answer is C 4,200!!!!!!!!!!

7. A hippopotamus weighs 1.5 tons. What is its weight in ounces

Answers

48000 ounces is the weight of the hippo
48,000 ounces! Hope this has helped you with your problem.

Triangle ABC is situated inside of a green square. The perimeter of the square is 33.6 feet. What is the area of triangle ABC?

Answers

Step-by-step explanation:

solution for the triangle ABC

Write the equation of the line that is parallel to the line y=3x+7 and passes through the
point (-4,-14).

Answers

Answer:

Step-by-step explanation:

hello :

note :

Use the point-slope formula.

y - y_1 = m(x - x_1)   when : x_1= -4      y_1= -14  

     m= 3 (parallel means same slope)

an equation in the point-slope form is : y +14 =3(x+4)

Will give brainliest for right answer! :)

Answers

Answer:

155.52mm

Step-by-step explanation:

the area of the rectangle. 16×16=256. the area of the semicircle. 3.14×8×8=100.48. subtract the semicircle from the rectangle 256_100.48= 155.52mm

Answer:

27.47 square mm

Step-by-step explanation:

Area square = 16x16= 256

           Half square=     255/2=128

Area circle    pi x 64 = 201.06...

semicircle        201.06.../2 = 100.53

                128-100.53 =27.47    

Please help and Please write real equation for the answer thank you

Answers

Answer:

  f(x) = (3x -12)/(x² -7x +12)

Step-by-step explanation:

The equation for a rational function can be written from the clues offered by the horizontal and vertical asymptotes, the y-intercept, and any "holes" in the function graph. Here, those clues are ...

horizontal asymptote: y = 0vertical asymptote: x = 3hole: (x, y) = (4, 3)y-intercept: (0, -1)

__

The horizontal asymptote at y=0 tells you the denominator is of higher degree than the numerator. The vertical asymptote at x=3 tells you (x-3) is a factor of the denominator. The hole at x=4 tells you there is a factor of (x-4) in both numerator and denominator.

At this point, the function is tentatively ...

  [tex]f(x)=a\dfrac{x-4}{(x-3)(x-4)}[/tex]

Evaluating this at the y-intercept, x=0, gives ...

  f(0) = -1 = a/(0 -3) = -a/3

  a = 3 . . . . . multiply by -3

Then our rational function, consistent with all of the features of the graph, is ...

  [tex]f(x)=\dfrac{3(x -4)}{(x -3)(x -4)}\\\\\boxed{f(x)=\dfrac{3x-12}{x^2-7x+12}}[/tex]

100 points pls help ty

Answers

Answer:

Sam is right, 9 is the max number of pull-ups done by a player.

Because it shows that there were 2 players that did 9.

(i’m assuming the x’s represent the players)

Answer:

Answer

Answer:

Sam is right, 9 is the max number of pull-ups done by a player.

Because it shows that there were 2 players that did 9.

Step-by-step explanation:

Al llegar a la caja de un supermercado, la cuenta fue de 330 en alimentos y 150 en útiles de aseo . En el momento de pagar, le descontaron 10. si recibio 30 de vuelto ¿con cuanto pago?

Answers

Answer:

500

Step-by-step explanation:

330+150=480

480-10=470

470+30=500

A cylinder has a radius of 10 feet and a height of 11.4 feet.

What is the approximate volume of the cylinder?

Answers

Answer:

716.57

Step-by-step explanation:

V=πr2h

V = 2×22/7×10×11.4

= 716.571

give me a brainliest

Write a polynomial with zeros 0,-3, and 2 with multiplicities 2,1, and 2, respectively. What is its degree?

Answers

Polynomial is an expression that consists of indeterminates(variable) and coefficients. The degree of the polynomial will be 5.

What are polynomials?

Polynomial is an expression that consists of indeterminates(variable) and coefficients, it involves mathematical operations such as addition, subtraction, multiplication, etc, and non-negative integer exponentials.

The polynomial with zeros 0,-3, and 2 with multiplicities 2,1, and 2, respectively, can be written as,

[tex](x-0)^2(x+3)^1(x-2)^2\\\\= x^2(x+3)(x^2+4-4x)\\\\=(x^3+3x^2)(x^2+4-4x)\\\\=x^5 +4x^3-4x^4+3x^4+12x^2-12x^3\\\\=x^5 -x^4-8x^3+12x^2\\[/tex]

Hence, the degree of the polynomial will be 5.

Learn more about Polynomial:

https://brainly.com/question/17822016

#SPJ1

y + 9 * 3 / 4
3/4 is the fraction

Answers

Answer:

y+6.75

Step-by-step explanation:

Answer: y+6.75

Follow Order of Operations

y+9*3/4

9*3/4 = 6.75

y+6.75

[50 points!]

Find P (Freshman | Boy)

Hint:
P(A and B)/P(B)

Classroom of Students:
Boys Girls
Freshman 4 4 8
Sophomore 57 12
Junior 2 3 5
Senior 1 4 5
12 18

Reduce your fraction to lowest terms.

Enter the number that belongs in the green box.


Answers

Answer:

1/3

Explanation:

P(Freshman | Boy)

Freshman = 4Boy = 12

⇒ Probability = Number of favorable outcomes ÷ Total number of possible outcomes

P(Freshman | Boy) = freshman/total boysP(Freshman | Boy) = 4/12P(Freshman | Boy) = 1/3

Answer:

[tex]\sf \dfrac13[/tex]

Step-by-step explanation:

From the table:

Total number of Boys = 12Total number of students = 30Total number of Boys who are Freshman = 4

[tex]\sf Probability \ of \ an \ event \ occurring = \dfrac{Number \ of \ ways \ it \ can \ occur}{Total \ number \ of \ possible \ outcomes}[/tex]

[tex]\sf \implies P(Boy)=\dfrac{12}{30}[/tex]

[tex]\sf \implies P(Freshman \cap Boy)=\dfrac{4}{30}[/tex]

[tex]\begin{aligned}\sf P(Freshman|Boy) & = \sf\dfrac{P(Freshman \cap Boy)}{P(Boy)}\\\\ & = \sf\dfrac{4}{30} \div \dfrac{12}{30}\\\\ & = \sf\dfrac{4}{30}\times \dfrac{30}{12}\\\\ & = \sf \dfrac{4}{12}\\\\ & = \sf\dfrac{1}{3}\end{aligned}[/tex]

The population of Banana Island is slowly increasing and can be calculated by P(t) = 93.3/3 + 0.23t where Pis the population (measured in millions) and t is time (measured
in years). Approximately how many years will it take for the population of the island to reach 200 million?

A. 6.9
B. 1.6
C. 7.9
D. 4.6

Answers

Answer:

6.09 is the ans thanku please mark me brainleaset ans

(2x > 10) list some values for x that would make this inequality true

Answers

Answer:

6,7,8,9

Step-by-step explanation:

> means Greater than

< means Less than

Thus,

Any number that greater than 10 would make this inequality true..

Some possible values for x can be:

6,7,8,9,11,12,13,14,15,16,17,18 and so on

[RevyBreeze]

Mikes parents bought him new gaming console he gets 72612312 games n puts in 5312 how much does he have left

Answers

Answer:

Seventy-two million, six hundred and seven thousand games remaining

please mark brainliest

Answer:

72607000

Step-by-step explanation:

just subtract 5312 from 72612312

÷what expression could be used to solve 2/5 ÷ 3/4

Answers

Answer:

The expression is division.

Step-by-step explanation:

2/5 ÷3/4=0.075

Answer:

[tex]\frac{2}{5} \times\frac{4}{3}[/tex]

Step-by-step explanation:
To find the answer we use KCF (Keep, Change, Flip).

[tex]\frac{2}{5} \div\frac{3}{4}[/tex]
[tex]\frac{2}{5} =\frac{2}{5}[/tex]
[tex]\div=\times[/tex]
[tex]\frac{3}{4} =\frac{4}{3}[/tex]
[tex]\frac{2}{5} \times\frac{4}{3}[/tex]

Which means the expression used to find the answer would be "2/5 × 4/3."

Hope this helps.

(0 points)
4A is an acute angle in a right triangle.
If cos A = 15/17, find the ratio for the sin A.
Explain how you solved the problem in 2-3 sentences or show your steps.

Answers

Answer:

sin A = 8/17.

Step-by-step explanation:

As cos A =  15/17 one leg of the triangle = 15 and the hypotenuse = 17.

The side length 15 is the adjacent side to angle A.

First find the length of other side of the right triangle, using the Pythagoras

Theorem:

Opposite side to ange A = √(17^2 - 15^2)

= √64

= 8 units.

sin A = opp side / hyp

= 8/17.

Find each difference vertically.
3. (2x ^2 – 2x ^4) — (x4 – x2)

Answers

Answer:

answer: -2x^4 +2x^2-2x

Use 2-3 sentences to explain, in your own words, why the two acute angles in a right
triangle are complementary using the following vocabulary words: right triangle, acute
angles, angle sum theorem, and degrees.

Answers

Answer:

In a right triangle, we know that there is one 90 degree angle and two acute angles. The angle sum theorem states that the sum of all angles in a triangle equal 180 degrees. For this reason, we know that these two acute angles must equal 90 degrees or be complementary angles to add up with the 90 degree right angle and equal 180.

I hope this helps!

Answer:

In a right triangle, the angle opposite the hypotenuse is always 90 degrees. The angle sum theorem states that the sum of the interior angles of a triangle is 180 degrees.  Therefore, the other two angles sum to 90 degrees, which means they are complementary.  They are also acute angles, since they are each less than 90 degrees.

Find two numbers whose product is 110, and whose sum is 21.

Answers

Step-by-step explanation:

The answer is 10 and 11

10 + 11 = 21

10 × 11 = 110

Mike spins a spinner and flips a coin. What
is the probability of getting E on the spinner
and the coin landing on heads?

Answers

Answer:

3/16

Step-by-step explanation:

The probability of spining an E is 3/8 and the probability of fliping heads on a coin is 1/2 so the probablility of both those things happening is 1/2*(3/8) or 3/16

What is the length of LM?

Answers

Let see

KM²=LM×MJ6²=LM×3LM=36/3LM=12

Option B

The perimeter of a rectangular goat pen is 28 meters. The pen is 5 meters wide. How long is it?

Answers

Answer:

I think it would be 9 meters.

Step-by-step explanation:

5x2=10

28-10=18

18(divided by)2=9 meters

Answer:

9 meters long

Step-by-step explanation:

the perimeter is 28 meters. itts 5 meters wide and itt is recttangle so itt have two of the same width. so now 5x2=10 and 28-10=18 now 18/2=9. please mark me brainliest if i got it correct

If alpha and beta are the zeros of the polynomial 2x2+5x+k, find k such that (alpha)2+(beta)2+(alpha)*(beta)=24

Answers

Answer:

  k = -35.5

Step-by-step explanation:

When α and β are zeros of the polynomial 2x² +5x +k, it can be written in factored form as ...

  2x² +5x +k = 2(x -α)(x -β)

When the factored form is expanded, it becomes ...

  = 2x² -2(α+β)x +2αβ

Comparing this to the original, we see that ...

5 = -2(α+β)k = 2αβ

__

Then the given expression can be used to find k:

  α +β = -5/2 . . . . . solved the first relation for α+β

  (α +β)² = (α² +β² +αβ) +αβ = 24 +αβ

  (-5/2)² = 24 +αβ . . . . . . . use -5/2 for α+β

  αβ = 25/4 -24 = -17.75 . . . . . solve for αβ

Then the value of k is ...

  k = 2αβ = 2(-17.75)

  k = -35.5

find the slope and y-intercept of the line y=7x-9

Answers

Answer:

Slope: 7

Y-Intercept : -9

Step-by-step explanation:

dding and Subtracting Decimals struction Active Finding an Account Balance Dewan's bank account balance is -$16.75. He deposits checks totaling $23.59. What is his new balance? O $1.08 O $6.84 O $9.16 O $24.34.what is the answer

Answers

Answer: 24.34 is his balance.

Step-by-step explanation:

270$ ask your teacher for your

Find the value of m if 13m + 24m = 41m

Answers

Answer:

m=0

Step-by-step explanation:

Add

13m

and

24m

.37

m=

41m

Move all terms containing m

to the left side of the equation.

what is 2pi*4^2 + 2pi*4*4

~giving brainliest!~

Answers

Answer:

[tex]64\pi[/tex]

Step-by-step explanation:

[tex]2\pi {(4)}^{2} + 2\pi \: 4 \ast4 \\ \\ = 2\pi \ast16 + 2\pi \ast16 \\ \\ = 32\pi + 32\pi \\ \\ = 64\pi[/tex]

Answer:

64π

Step-by-step explanation:

2π(4²) + 2π(4)(4) <== exponents first

2π(16) + 2π(16) <== multiply

32π + 32π <== add

64π <== final answer

Note: 4 * 4 can also be written as 4²

Hope this helps!

Other Questions
Triangles ABC and DEF areA. Similar trianglesB. Not similar triangles A box has 14 candies in it: 3 are butterscotch, 7 are peppermint, and 4 are taffy. (Each candy falls into only one of these categories.) Laura wants to select two candies to eat for dessert. The first candy will be selected at random, and then the second candy will be selected at random from the remaining candies. What is the probability that the two candies selected are taffy? What is the best method to resolve a conflict? O give each person time to explain their side O include past conflicts so that everything is out in the open o allow someone else to decide the outcome o keep people in the room until the problem is solved Help with the math question please Write an interpretive essay that analyzes literature from the perspective of a quotation. In your essay, interpret the quotation and explain how it applies to literature you have read. Support your viewpoint with evidence from a variety of literary texts that you have read. Include precise language and literary terms."That's what literature is. Its the people who went before us, tapping out messages from the past, from beyond the grave, trying to tell us about life and death! Listen to them!"Please answer in 5 paragraphs. 4.Lisa is planting a garden. The rows of peas in Lisa's garden are going to be 3 feet long, so she will plant a seed every 3/16 of a foot. Which of these is the same as 3/16? what should be subtract from -1/7 to get 11/14? . please answer the question........................................ .......... 8. in this sentence, which verb could replace the word reached to create an example of personification? the storm had reached our town by sundown. a. drenched b. punished c. cooled d. passed In the last step in solving a problem, Jerry divided by 0.4 instead of multiplying by 0.4 and thus arrived at an answer of 400. If Jerry's calculations were otherwise correct, what was the correct answer to the problem?Please answer i need help with this question and i will give brainliest Please help me i will give brainliest Describe what happens to the light ray when it travels through air then into water Everything looks like a nail, inc. is a manufacturing company that produces hammers. the company faces various fixed and variable costs in the short run. determine which of everything looks like a nail's costs are fixed costs and which are variable costs. assume the company cannot easily adjust the amount of capital that it uses and that salaries are negotiated only once per year. How many months did lillie make on-time payments for her line of credit at astoria federal savings? About how long does light take to cross the milky way galaxy?. Write a research-based argumentative essay for or against health care for everyone.this is what I haveHealth care should be free for everyone. Not everybody can afford this and because of that, not only individuals, but families as a whole suffer. If health care was free and accessible to everybody, there would be a decline In the spread of diseases as more treatment would be available.Some people might say that health care should not be free for everyone seeing as that could potentially bring down our economy. However, the opposition against free health care is not a valid fear because many European counties have free health care and their economy functions fine.In conclusion, free healthcare would benefit and protect many citizens. It helps the majority of people and is the best solution hurry 80 pts Finish the MCR title:"I'm Not Okay"(___)A. (Help Me)B. (I Promise)C. (But That's Okay)D. (Leave Me Alone) Shaquana read 34 pages in 1 1/3 hours. At what rate, in pages per hour, did she read WILL GIVE BRAINLIESTThe Coriolis Effect is the measurement of wind speed based on friction from mountains.Question 2 options: True False The disorder that shares many similar symptoms with schizophrenia is ___________ personality disorder. Group of answer choices schizotypal borderline paranoid schizoid The lemming population cycle is A. generally three to five years B. a unique event in nature C. limited to a cycle of three months D. related to seasonal births and deaths