50. This month, Malcolm has $100 saved, and his goal is to have a total of $310 saved 12 months from now. After adding to his savings next month, each month he will add $1 more than what he added the previous month. For the next 12 months, Malcolm will not remove any money from what he has already saved. What is the minimum amount of money Malcolm must add to his savings next month so that he reaches his goal?

Answer and Explanation

Your Answer is

Correct Answer is F

Explanation

Assume x dollars are to be deposited in the next month. So you can list the equation: 310=100+(x+x+11)×12÷ 2 and get x=12.