The equation h(t)= -16t2 + 32t +9
en D
gives the height of a rock, h in feet above the ground, at t seconds after the rock is thrown upward.
After how many seconds will the rock hit the ground?
(Help ASAP!)

The circumference of a circle is 5 pi cm. what is the area of the circle?

Last year, a state university received 3,560 applications from boys. of those applications, 35 percent were from boys who lived in other states. part a)how many applications did the university receive from boys who lived in other states? part b)applications to the university from boys represented 40percent of all applications. how many applications did the university receive in all? i don't how to do part b so me and plz tell how you got your answer

The party planning committee has to determine the number of tables needed for an upcoming event. if a square table can fit 8 people and a round table can fit 6 people, the equation 150 = 8x + 6y represents the number of each type of table needed for 150 people.