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zepelin [54]
2 years ago
9

The half-life of a radioactive kind of strontium is 10 hours. How much will be left after 40 hours, if you start with 80 grams o

f it?
Mathematics
1 answer:
inysia [295]2 years ago
6 0

The amount of strontium that will remain after 40 hours is 5 g

<h3>How to determine the number of half-lives </h3>
  • Half-life (t½) = 10 hours
  • Time (t) = 40 hours
  • Number of half-lives (n) =?

n = t / t½

n = 40 / 10

n = 4

<h3>How to determine the amount remaining </h3>
  • Original amount (N₀) = 80 g
  • Number of half-lives (n) = 4
  • Amount remaining (N) =?

N = N₀ / 2ⁿ

N = 80 / 2⁴

N = 80 / 16

N = 5 g

Learn more about half life:

brainly.com/question/26374513

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3 years ago
Valarie made fruit drinks for a birthday party. She used 3/6 of a cup of grape juice, 5/6 of a cup of strawberry juice, and 2/6
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Answer:

Valarie make 1\frac{2}{3}\ cups of fruit drink.

Step-by-step explanation:

Given:

Valarie made fruit drinks for a birthday party.

She used 3/6 of a cup of grape juice, 5/6 of a cup of strawberry juice, and 2/6 cup of soda. She mixes all the juices together.

Now, to find cups of fruit drink Valarie make.

As given that she mixes all juices altogether.

So, to get the cups of fruit drink we add all quantities of juice:

3/6 cup of grape juice + 5/6 cup of strawberry juice + 2/6 cup of soda.

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