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39 votes
39 votes
Help with finding answers to investment word problemsNatalie invests $5,000 into a savings account which earns 10% per year. In 5 years how much will Natalie’s investment be worth if interest is compounded quarterly

User Jeduan Cornejo
by
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1 Answer

19 votes
19 votes

Answer

$8,193.08

Explanation

Compound interest formula


A=P(1+(r)/(n))^(nt)

where

• A: final amount

,

• P: principal (initial amount)

,

• r: interest rate, as a decimal

,

• n: number of times interest is applied per year

,

• t: time in years

Substituting P = $5,000, r = 0.1 ( = 10/100), n = 4 (quarterly means 4 times per year), and t = 5 years, we get:


\begin{gathered} A=5,000\cdot(1+(0.1)/(4))^(4\cdot5) \\ A=5,000\operatorname{\cdot}(1.025)^(20) \\ A=\text{ \$}8,193.08 \end{gathered}

User Sshongru
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