Question

can some one check my answers :)

1.)if an object is dropped from a height of 144 ft the function h(t)=-16t^2+144 gives the height of the object after t seconds. when will the object hit the ground?
a.)1.5 seconds
b.)3 seconds ***
c.) 6 seconds
d.)9 seconds

2.) the area of a play ground is 64 square yards. the length of the play ground is 4 times longer than its width. find the length and the width of the play ground.
a.) L=16 yards; w=4 yards ***
b.)L=2 yards ; w= 32 yards
c.) L=32 yards ; w=2 yards
d.) L=4 yards ; w=16 yards

Answer 1

you are right.