rachel deposited $10 in an account earning 5% interest compounded annually. to the nearest cent, how much…

rachel deposited $10 in an account earning 5% interest compounded annually. to the nearest cent, how much interest will she earn in 3 years?

rachel deposited $10 in an account earning 5% interest compounded annually. to the nearest cent, how much interest will she earn in 3 years?

Answer

Explanation:

Step1: Identify compound - interest formula

The compound - interest formula is $A = P(1 + r)^t$, where $P$ is the principal amount, $r$ is the annual interest rate (as a decimal), and $t$ is the number of years. Here, $P=$10$, $r = 0.05$ (since $5%=0.05$), and $t = 3$.

Step2: Calculate the amount $A$

$A=10\times(1 + 0.05)^3=10\times(1.05)^3$. $(1.05)^3=1.05\times1.05\times1.05 = 1.157625$. So, $A = 10\times1.157625=$11.57625$.

Step3: Calculate the interest $I$

The interest $I$ is the difference between the final amount $A$ and the principal $P$. So, $I=A - P$. $I=11.57625−10=$1.57625$. Rounding to the nearest cent, $I\approx$1.58$.

Answer:

$1.58$