Problem 6. [10 pts] A gardener wants to add mulch to a bed in his garden. The bed is 60 feet long by 30 feet wide. The gardener wants the mulch to be 4 inches deep, how many cubic yards of mulch does the gardener need? [1 foot = 12 inches 1 cubic yard = 27 cubic feet] Problem 7. [10 pts]. Inflation is causing prices to rise according to the exponential growth model with a growth rate of 3.2%. For the item that costs $540 in 2017, what will be the price in 2018?