A boy is launching a toy rocket he got for his birthday from the top of an 80 ft building. The function representing the height is f(x) = -16x2 + 64x + 80 where x represents time in seconds.
How long was the rocket in the air?
A)
-1 sec
B)
2 sec
o
5 sec
Eliminate
D)
2.3 sec

Desmond wants to sell his car that he paid $8,000 for 2 years ago. the car depreciated, or decreased in value, at a constant rate each month over a 2-year period. if x represents the monthly depreciation amount, which expression shows how much desmond can sell his car for today? 8,000 + 24x 8,000 - 24x 8,000 + 2x 8,000 - 2xdesmond wants to sell his car that he paid $8,000 for 2 years ago. the car depreciated, or decreased in value, at a constant rate each month over a 2-year period. if x represents the monthly depreciation amount, which expression shows how much desmond can sell his car for today? 8,000 + 24x 8,000 - 24x 8,000 + 2x 8,000 - 2x