HELP ME PLEASE what is 80% of 40

Kapil needed to buy a long wooden beam. he went to two sawmills that each charge an initial fee plus an additional fee for each meter of wood. the following equation gives the price (in dollars) of a wooden beam from the first sawmill as a function of its length (in meters). p = 5+20xp=5+20x

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

Acar travels at an average speed of 52 miles per hour. how long does it take to travel 299 miles