Emily received a bonus of $9,000 from her company and wants to invest it in an account to save for a dream vacation. Her investment account has a 10% interest rate compounded continuously. How long will it take for her money to grow to $24,420?Use the formula A=Pert, where A is the balance (final amount), P is the principal (starting amount), e is the base of natural logarithms (≈2.71828), r is the interest rate expressed as a decimal, and t is the time in years. Round your answer to the nearest tenth.
Q. Emily received a bonus of $9,000 from her company and wants to invest it in an account to save for a dream vacation. Her investment account has a 10% interest rate compounded continuously. How long will it take for her money to grow to $24,420?Use the formula A=Pert, where A is the balance (final amount), P is the principal (starting amount), e is the base of natural logarithms (≈2.71828), r is the interest rate expressed as a decimal, and t is the time in years. Round your answer to the nearest tenth.
Identify values: Identify the values for P, A, r, and t.P=9000A=24420r=0.10
Use formula: Use the formula A=Pert.24420=9000×e0.10×t
Divide to isolate: Divide both sides by 9000 to isolate e0.10×t.900024420=e0.10×t2.7133333=e0.10×t
Take natural logarithm: Take the natural logarithm of both sides to solve for t.ln(2.7133333)=0.10⋅t
Calculate logarithm: Calculate the natural logarithm. ln(2.7133333)≈0.9980.998=0.10⋅t
Solve for t: Solve for t by dividing both sides by 0.10.t=0.100.998t≈9.98
Round to nearest tenth: Round to the nearest tenth.t≈10.0So, it will take approximately 10.0 years for Emily's money to grow.
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