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s344n2d4d5 [400]
3 years ago
13

the half-time life of strontium-85 is 64.84 days. how much of a 40 mg sample would be left after 180 days​

Mathematics
1 answer:
Fynjy0 [20]3 years ago
7 0

Answer:

  about 5.84 mg

Step-by-step explanation:

The amount remaining after t days can be written as ...

  remaining = initialAmount · (1/2)^(t/(halfLife))

Filling in the given numbers, you have

  remaining = (40 mg)·(1/2)^(180/64.84) ≈ 5.84 mg

About 5.84 mg would be left after 180 days.

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