Find the volume of the regular pyramid

Aboat costs 19200 and decreases in value by 12% per year. how much will it cost in 5 years

Bill works as a waiter and is keeping track of the tips he ears daily. about how much does bill have to earn in tips on sunday if he wants to average $22 a day? tips by day tips (dollars) monday tuesday wednesday thursday friday saturday $14 $22 $28 $36

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