10 points how many years (approx.) will it take $6,000 to amount to $8,000 if it is invested at an annual rate of 9.0% compounded continuously? 23 years 3 years 9 years 2 years 42 years

Negative 5 1/12 + negative 4 1/4 + 6 3/4

Offering 30 if a plus b plus c equals 68 and ab plus bc plus ca equals 1121, where a, b, and c are all prime numbers, find the value of abc. the answer is 1978 but i need an explanation on how to get that.

What is the product? a-3/15a × 5/a-3