Hola por favor me pueden ayudar.

Marlow is comparing the prices of two trucks rental compaines company a charges $3 per hour and an addtional $75 as serivce charges company b charges $2 per hour and an additional $85 as serivce charges

If a baby uses 15 diapers in 2 days, how many diapers will the baby use in a year?

Apositive number a or the same number a increased by 50% and then decreased by 50% of the result?