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poizon [28]
2 years ago
12

Two different radioactive isotopes decay to 10% of their respective original amounts. Isotope A does this in 33 days, while isot

ope B does this in 43 days. What is the approximate difference in the half-lives of the isotopes?
The answer is 3 days
Mathematics
2 answers:
GarryVolchara [31]2 years ago
8 0

Answer:

A) 3 Days

Step-by-step explanation:

Semmy [17]2 years ago
4 0
The answer is three days
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This is a simple interest problem.

The simple interest formula is given by:

E = P*I*t

In which E is the amount of interest earned, P is the principal(the initial amount of money), I is the interest rate(yearly, as a decimal) and t is the time, in years.

After t years, the total amount of money is:

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In this question:

Rate of 10%, so I = 0.1.

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How much should he pay for a note that will be worth $3,000 in 9 months?

We have to find P for which T = 3000. So

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P = \frac{3000}{1.075}

P = 2790.7

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