Element X is a radioactive isotope such that every 13 years, its mass decreases by half. Given that the initial mass of a sample of Element X is 60 grams, how much of the element would remain after 30 years, to the nearest whole number?

Answers

Answer 1

Answer:

2,325 grams !

Step-by-step explanation:


Related Questions

This year, there are 220 farmers raising chickens in the county. This is a 30% increase over last year. How many farmers raised chickens last year?

Answers

Answer:

169 farmers raised chickens last year.

Step-by-step explanation:

Given that:

Number of farmers raising chickens this year = 220

This is 30% more than previous year.

Let,

100% be the percent of previous year and x be the number of farmers who raised chicken previous year.

Percent of farmers who raised chickens this year = (100+30)% = 130%

130% of x = 220

[tex]\frac{130}{100}x = 220[/tex]

1.3x = 220

Dividing both sides by 1.3

[tex]\frac{1.3x}{1.3}=\frac{220}{1.3}\\x=169.23[/tex]

Rounding to nearest whole number

x = 169

Hence,

169 farmers raised chickens last year.

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Answers

What's wrong with you?

Answer:

UHHHHh

Step-by-step explanation:

wh- That's just...

Pet Supplies make a profit of $5.50 per bag on the nine of natural dog food. If the store wants to make a profit of no less than $5200, how many bags of dog food does the store I need to sell?

Answers

Answer:

=> (5200 X 9)/5.5=8509

Step-by-step explanation:

You pay $22 to rent 6 video games. The store charges $4 for new games and $2 for old games. How many new games did you rent?

Answers

Answer: 5 new games. 1 old game.
4x5=$20
Add the remaining $2 which Is the cost of 1 old game to get to the total spent.

Answer:

You rented 4 new games and 1 old game

Step-by-step explanation:

- we can divide $22 by (4×5) and (2×1)

4×5 = 20

2×1 = 2

20+2 = 22

Matthew buys 13 uniforms for the baseball team. He pays $455 in total. What ratio shows the relationship of price to uniforms?

2Points
Select 2 possible answers.

Remember to reduce the ratio by the GCF

A
1 to 13

B
35 to 1

C
13 to 455

D
455 to 13

Answers

Answer: 35:1

Step-by-step explanation:

Glad I could Help :)

Find the length of side AB.
Give your answer to 3 significant figures.
с
410
13.5 cm
A
B

Answers

Answer:

AB ≈ 8.86 cm

Step-by-step explanation:

Using the sine ratio in the right triangle

sin41° = [tex]\frac{opposite}{hypotenuse}[/tex] = [tex]\frac{AB}{BC}[/tex] = [tex]\frac{AB}{13.5}[/tex] ( multiply both sides by 13.5 )

13.5 × sin41° = AB , then

AB ≈ 8,86 cm ( to 3 significant figures )

Answer:

8.87

Step-by-step explanation:

use the sin law for right triagles sin(θ)= opposite/hypotenuse so

sin(41)=(AB)/13.5

13.5×sin(41)=AB

8.87=AB

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Answers

Answer:

its 56

Step-by-step explanation:

Lol ive done dis before

Answer:

Step-by-step explanation:

38.1

The price of a skateboard is $75. If the store has a 20% off sale, how much will the skateboard be?

Answers

Answer:

The skateboard will be $60

Step-by-step explanation:

$75 x 0.2 = $15

$75 - $15 = $60

Lamont’s grandmother started a stamp collection in 1914 (year 1) and added the same number of stamps to the collection each year. When Lamont’s mother received the collection in 1954, there were 203 stamps in the collection. Lamont’s mother continued to add the same number of stamps to the collection each year. When Lamont received the collection in 1990, there were 383 stamps in the collection. If Lamont continued to add the same number of stamps each year, how many stamps were in the collection at the end of 2000 (year 86)?

A. 204

B. 293

C. 433

D. 663

Answers

Answer: C. 433

Step-by-step explanation:

Linear equation: y=mx+c,  where m= constant rate of change, c=initial value of yor y-intercept.

Let x = number of years after 1914.

y=  Number of stamps after x years.

In 1954 (year 40), there were 203 stamps in the collection.

i.e. 203=40m+c (i)  [rate of change in number of stamps  is constant]

In 1990 (year 76), there were 383 stamps in the collection.

i.e. 383=76m+c (ii)

Subtract (i) from (ii)

180= 36m

[tex]\Rightarrow\ m=5[/tex] i.e. 5 stamps added per year.

from (i), [tex]203=40(5)+c\Rightarrow\ c=203-200=3[/tex] [Initially he has 3 stamps]

Stamps in 2000(year 86)  = m(86)+c= 5(86)+3

= 430+3

= 433

Hence, correct option is C. 433

PLEASE HELP ASAP
Evaluate bd/a +c if a=−2 , b=3 , c=−12 , and d=−4 .

Answers

Answer:

[tex] \frac{bd}{(a + c)} = \frac{3 \times ( - 4)}{ (- 2) + ( - 12)} = \frac{( - 12)}{( - 14)} = \frac{6}{7} \\[/tex]

6/7 is the right answer.

PLS HELP!!! it’s easy and i’ll give brainliest

Answers

Answer:

6.5

Step-by-step explanation:

8÷tan(51)=6.47...

              =6.5(correct to the nearest tenth)

             

Make q the subject of the formula 2(5q^2+1)=c

Answers

Cndnsnakandbdbbbxs snd

Please help I with give Brainiest if correct

Answers

Answer:

7r 637 74 472a.b/s

Step-by-step explanation:

5+(-3) show it in a number line

Answers

Answer:

i got 2 hope thats helps

Step-by-step explanation:

Answer:

Step-by-step explanation:

can someone help me out please

Answers

Answer:

D. g(x) = (x - 5)² + 3

Step-by-step explanation:

If a graph is translated horizontally, the value will affect x inside of the parentheses. For example, (x + #) or (x - #).

If a function is translated to the right, there will be a (-) sign. If a function is translated to the left, there will be a (+) sign.

This function needs to be translated 5 units to the right. Therefore, the equation will be: g(x) = (x - 5)² + 3

Is 9.5 bigger than 9​

Answers

Answer:

yes it is.

Step-by-step explanation:

9.5 is greater than 9 as when we divide 9.5 by 9 the result is greater than one.

What is the scale factor?

By using a scale factor we can determine if one quantity is greater than or less than another quantity.

Given, are two numbers 9.5 and 9 to determine if 9.5 is greater than 9 or not we'll divide 9.5 by 9 if the result is greater than 1 then 8.5 is greater than 9 and if the result is less than 1 then 9.5 is less 9.

Now, 9.5/9 = 1.05 which is greater than 1.

∴ 9.5 is greater than 9.

learn more about scale factors here :

https://brainly.com/question/22312172

#SPJ2

Find the missing length indicated.
х
12
9
X =
units

Answers

Answer:

16

Step-by-step explanation:

9/12=12/x

x=16

What is the final elevation if a bird starts at 20 m and changes 16 m?

Do not include units (meters) in your answer

Answers

Answer:

Depends if the bird is going up or down, if going up, then they are 36 (you said don't say units so i won't say it) in going up and 4 if going down! :D

Step-by-step explanation:

Find the area of the composite shape.

Answers

Answer: I would really love to help but I am not a smart people hope you have a good day anyway!

Step-by-step explanation: Go ahead and flag the answer I know someone will anyway

please help me on this will give you brainliest

Answers

expression would be

46 - 2v

a) Write down the smallest positive integer, k, such that 180k is a perfect square.
180

b) Write down the smallest positive integer, k, such that
k is a perfect square.

plz help w both questions

Answers

Prime factorization
180 = 2^2*3^3*5*k
Smallest perfect square when k =5
:::::
k=1 is the smallest perfect square

Mr.nichols rolls a fair number cube with faces numbered 1 through 6 and spins a spinner. The cube and the spinner are shown below.

Answers

Helppp please I need this answer too !!

margarite owns a boutique. she sells her jewelry at a 30% markup. if she buys a bracelet for $22, what would she sell it for after the markup?​

Answers

She would sell it for $26.60 after the markup.

Write an equation that is perpendicular to the line y = 5x - 1 and passes through the point (10, 8)

Answers

Answer:

y = -1/5 x + 10

Step-by-step explanation:

The equation of a line in point slope form is expressed as;

y - y0 = m(x-x0)

m is the slope

(x0, y0) is the point on the line

Given the equation y = 5x -1

Slope m = 5

Slope of the line perpendicular to the line will bw M = -1/5

Substitute into the equation

y - 8 = -1/5(x-10)

5(y-8) = -(x-10)

5y - 40 = -x+10

5y = -x+10+40

5y = -x+50

y = -1/5 x + 10

Hence the required equation is y = -1/5 x + 10

can someone please help y=___x+____

Answers

Answer:

>\/<

[tex]y = 4x - 9[/tex]

>/\<

Answer:

y=4x+(-9)

Step-by-step explanation:

Slope intercept form is y=mx+b

m is the slope which can be found using rise/run. In this case 4/1=4 so m=4

b is the y intercept which is the y value where the line passes through the X axis. This also can be found as the Y value where X=0 if that is easier for you. In this problem y=-9 where X=0. Therefore b=-9.

Plug these values back into the equation and you get the equation of the line in slope intercept form. For this line that is y=4x+(-9).

HELPPPPP ILL MARK YOU BRAINLIST

Answers

Answer:

857

Step-by-step explanation:

times all of the nines together. then times the 4's and the 8 together. Then add the answer u got by timesing the 9's together. and the 4's and the 8 together.

Answer:

9 to the power of 4 is 36. Multiply to get the exact answer.

9³x2= 9 to the third power ° because if we have no callouts then that will be the ↑↓ estimate of the exponets.

Step-by-step explanation:

The answer is simple 36+36 (9³x2) x9 to the 8th. multiply and put in green box.

Please help me!
"Explain why this graph shows a function."

Answers

Answer:

This graph shows a function because no vertical line passes through more than one point on the graph.

Step-by-step explanation:

Use the given scale factor and the side lengths of the scale drawing to
determine the side lengths of the real object.
BRAINLIEST

Answers

can anybody help maybe b

Answer:

B

Step-by-step explanation:

i took i test trust me ( :

select the correct values for x and y in the figure below given the two figures are similar

Answers

Answer:

i think it might be B or C

Step-by-step explanation:

Answer:

B) 120

Step-by-step explanation:

both shapes are supposed to be similar, meaning the 60° on the bigger on is the same on the smaller on

360-120=240

240/2=120

If £29 =500 rubles how many £ are in 1,260 give your answer to 2dp

Answers

Based on the information given, it should be noted that the value of 1260 will therefore be £73.09.

Solving equations

From the information given, it was stated that £29 =500. Therefore, the equation to solve that of 1260 will go thus:

£29 =500

£1 = 500/29

£1 = 17.24

Therefore, 1260 will be:

= 1260/17.24

= £73.09

Learn more about equations on:

https://brainly.com/question/13763238

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