Author Question: An investment of P dollars is deposited in a savings account that is compounded quarterly with an ... (Read 123 times)

Haya94 · **on:** Dec 18, 2021

Question 1

Five hundred grams of a particular radioactive substance decays according to the function

where t ≥ 0 measures the time in years. When does the mass of the substance reach 10 grams? Round to the nearest year.
◦ 800 years
◦ 488 years
◦ 1931 years
◦ 1565 years

Question 2

An investment of P dollars is deposited in a savings account that is compounded quarterly with an annual interest rate of r, where r is expressed as a decimal. The amount of money A in the account after t years is given by A = P (1 + r/4)^4t. Use this equation to determine the time it takes for an investment of $10,000 to increase to $12,000 if it is placed in an account that is compounded quarterly with an annual interest rate of 1.6%. Round to the nearest tenth.
◦ 2.9 years
◦ 9.6 years
◦ 45.7 years
◦ 11.4 years

heyhey123 · **Reply #1 on:** Dec 18, 2021

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