Final answer:
Mr. Harper lent the money to Vanessa at an interest rate of 1.25%
Step-by-step explanation:
To find the rate of interest, we can use the formula for simple interest:
Simple Interest = Principal * Rate * Time
In this case, the principal amount borrowed by Vanessa is $1,867 and the time is 4 months. The interest amount is given as $93.35.
Substituting these values in the formula, we get:
$93.35 = $1,867 * Rate * 4
Simplifying the equation, we have:
Rate = $93.35 / ($1,867 * 4)
Rate = 0.0125, or 1.25%
Therefore, Mr. Harper lent the money at an interest rate of 1.25%.