Use the following information to answer questions 54-56
A storage facility is currently offering a special rate to customers who sign contracts for 6 months or more. According to this special rate, the first month’s rent is $1, and for each month after the first month, customers pay the regular monthly rental rate. The table below shows the storage unit sizes available, the floor dimensions, and the regular monthly rental rate. All the units have the same height.
56. Janelle, the owner of the storage facility, is considering building new units that have floor dimensions larger than Size 5 units. She will use the floor area to determine the heating requirements of these larger units. For this calculation, Janelle will use the same relationship between the unit size number and the respective floor area for Sizes 1 through 5. Which of the following expressions gives the floor area, in square meters, of a Size x storage unit?
Your Answer is
Correct Answer is H
Explanation
First, calculate the floor area of the five Sizes, and find that they are equal to 8×1, 8×2, 8×4, 8×8, 8×16, while 8 remains unchanged, and the subsequent multiplier becomes 2n -1, so the general term formula is 23×2n-1=2n+2