Final answer:
After 5 years with simple interest at 18.5%, Mrs. Grant's R15,000 investment will grow to R28,875.
Step-by-step explanation:
To calculate the value of the investment after 5 years with simple interest, we use the formula for simple interest:
Interest = Principal × Rate × Time
For Mrs. Grant's investment:
Principal = R15,000
Rate = 18.5% or 0.185 (in decimal form)
Time = 5 years
Interest = R15,000 × 0.185 × 5 = R13,875
To find the total future amount, we add the interest to the principal:
Total future amount = Principal + Interest
Total future amount = R15,000 + R13,875 = R28,875