Thinking Mathematically (6th Edition)

Published by Pearson
ISBN 10: 0321867327
ISBN 13: 978-0-32186-732-2

Chapter 8 - Personal Finance - Chapter Summary, Review, and Test - Review Exercises - Page 570: 38

Answer

See below

Work Step by Step

(a) Calculation of future value of amount can be done with the mentioned formula: \[A=P\times {{\left( 1+\frac{r}{n} \right)}^{nt}}\] Where A denotes the Future value of the amount, P denotes the Principal amount, R denotes the rate of interest, t denotes the number of years and n denotes the number of times compounding is done in a year. Compute the Future value by substituting the values in the formula as mentioned below: \[\begin{align} & A=P\times {{\left( 1+\frac{r}{n} \right)}^{nt}} \\ & =\$30,000\times{{\left(1+\frac{0.025}{4}\right)}^{4\times10}}\\&=\$30,000\times{{\left(1+0.00625\right)}^{40}}\\&=\$38,490.80\end{align}\] Hence, the future value of the amount is \[\$38,490.80\] (b) Computation of the interest amount can be done by deducting the Principal amount (P) from the future value (A) of the loan. Compute the interest amount as mentioned below: \[\begin{align} & \text{Interest amount}=A-P \\ & =\$38,490.80-\$30,000\\&=\$8,490.80\end{align}\] Hence, the interest amount is\[\$8,490.80\].
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