I need help with this problem please

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?

What are the exclude value of mn+3m

Justin has 750 more than eva and eva has 12 less than justin together they have a total of 63 how much money did