Environmentalists estimate an annual population decrease of giraffes in the wild of 3.5% due to development. This can be modeled
1 answer:
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Answer:
56 days
Explanation:
where A is final amount, Ao is initial amount, t is time taken, h is half life
Here given:
initial amount: 400 millicuries
final amount: 3.125 millicuries
half life: 8 days
time taken: ?
Hence solve for time taken:
<u>insert values given</u>
<u>divide both sides by 400</u>
<u>apply exponent rule</u>
<u />
<u>simplify</u>
<u>multiply both sides by 8</u>