Maria had a spool of ribbion 68 inches long she cut the ribbon into 8 equal length pieces how long was each piece of ribbon zach said the anwser was 0.85 inches

Aprojectile is thrown upward so that its distance above the ground after t seconds is given by the function h(t) = -16t2 + 704t. after how many seconds does the projectile take to reach its maximum height?