Cameron has $90 in the savings account that earns 10% interest per year the interest is not compounded how much interest will she earn in 3 years use the formula I equals PRT where I is interest earned p is the principal r is the interest rate expressed as a decimal and t is the time in years

Answer 1

To calculate the interest earned using the formula \( I = PRT \), where:

• \( I \) is the interest earned,
• \( P \) is the principal amount (initial amount),
• \( R \) is the interest rate (expressed as a decimal),
• \( T \) is the time in years,

we can substitute the given values:

• \( P = 90 \) (the principal amount),
• \( R = 10% = 0.10 \) (the interest rate expressed as a decimal),
• \( T = 3 \) (the time in years).

Now we plug the values into the formula:

\[ I = PRT = 90 \times 0.10 \times 3 \] \[ I = 90 \times 0.10 = 9 \] \[ I = 9 \times 3 = 27 \]

Therefore, the interest earned over 3 years will be \( I = 27 \).

Cameron will earn $27 in interest after 3 years.