The function h(t)=−5t2+20t+60 h ( t ) = - 5 t 2 + 20 t + 60 models the height, in meters, of a ball t seconds after it is thrown.

When i did the math i got 11 cm

I'll do the first one for you. it isn't very hard at all.on number one, you have (50 × 3), which equals 150, and (3 × 3), which equals 9. after you establish that, you add 150 and 9 together. so, (150 + 9) equals 159.this means that 53 × 3 = 159.