If a car goes 70 miles per hour how long does it take to go 70 miles

Agreeting card company can produce a box of cards for $7.50. if the initial investment by the company was $50,000, how many boxes of cards must be produced before the average cost per box falls to $10.50?

Is this a polynomial function? i need to know asap

With both problems. a.s.a.p directions on photo ^