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Furkat [3]
3 years ago
11

The half-life of strontium -90 is approximately 29 Year’s . How much of a 150 g sample of strontium-90 will remain after 116 yea

rs
Mathematics
1 answer:
marin [14]3 years ago
3 0
The half-life is 29 years.
116 : 29 = 4
So we will have 4 periods of half-life:
( 1/2 )^4 = 1/16
150 g * 1/16 = 9.375 g
Answer:
9.375 g of strontium -90 will remain after 116 years.
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LenaWriter [7]

Answer:

x = 8

y = -7

Step-by-step explanation:

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3y - 5x = -61

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8 0
3 years ago
Suppose j varies jointly with g and v, j=1 when g=6 and v=3. Find j when g=8 and v=11
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j=4.88 when g=8 and v=11

Further explanation:

When the increase/decrease in one quantity cause increase/decrease in other quantity, it is called direct variation.

Variation is always accompanied by a variation constant.

<u>Given</u>

g and v vary directly with j

IT can be written as:

j∝gv

Putting the variation constant k

j = kgv

Putting g = 6 and v=3

j = kgv\\1 = k * 6 * 3\\1 = 18k\\k = \frac{1}{18}

So the value of k is 1/18 which makes the equation

j = \frac{1}{18}gv\\ Putting\ g=8\ and\ v=11\\j = \frac{1}{18} * 8 * 11\\j = \frac{88}{18}\\ j =4.88

So, j=4.88 when g=8 and v=11

Keywords: Variation, Direct Variation

Learn more about variation at:

  • brainly.com/question/11258952
  • brainly.com/question/1284310

#LearnwithBrainly

8 0
3 years ago
Need help on these questions.
STALIN [3.7K]

Answer:

1) a <u><</u> -8 or a <u>></u> 8

2) n = -18 or n = 18

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Step-by-step explanation:


5 0
2 years ago
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answer
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