5. your friend tosses a ball into the air. the equation h= -5t? + 30t + 10 models the height,
h, of the ball t seconds after it was thrown.
a. how long was the ball in the air?
2(-5)

i think asking google will you get the answer to that question

easy its decreasing

step-by-step explanation:

because its top point is at the to of the graph on the left side (atleast from the veiw i see it) now if that top point wast in the lower part of the graph it would be increasing hope this have a nice day