Molly has $97,905 in a savings account. The interest rate is 2% per year and is not compounded. How much interest will she earn in 8 months?

Use the formula i = prt, where i is the interest earned, p is the principal (starting amount), r is the interest rate expressed as a decimal, and t is the time in years.

1 answer

To calculate the interest earned using the formula \( i = prt \), we need to identify the values for \( p \), \( r \), and \( t \):

  • \( p = 97,905 \) (the principal amount in the savings account)
  • \( r = 0.02 \) (the interest rate expressed as a decimal, which is 2% or 0.02)
  • \( t = \frac{8}{12} \) (the time in years; 8 months is \(\frac{8}{12}\) years, which simplifies to \(\frac{2}{3}\) years)

Now we can substitute these values into the formula:

\[ i = p \cdot r \cdot t \] \[ i = 97,905 \cdot 0.02 \cdot \frac{2}{3} \]

Calculating the interest step by step:

  1. Calculate \( 0.02 \times 97,905 \):

\[ 0.02 \times 97,905 = 1,958.10 \]

  1. Now multiply \( 1,958.10 \) by \( \frac{2}{3} \):

\[ i = 1,958.10 \times \frac{2}{3} = 1,958.10 \times 0.6667 \approx 1,305.40 \]

Thus, the interest earned by Molly in 8 months is approximately $1,305.40.