Some fireworks are fired vertically into the air from the ground at an initial speed of 80 feet for second. The equation for this object’s height h at time t seconds after launch is h = -16t^2 + 80t. How long will it take the fireworks to reach the ground ?

Aclass consists of 55% boys and 45% girls. it is observed that 25% of the class are boys and scored an a on the test, and 35% of the class are girls and scored an a on the test. if a student is chosen at random and is found to be a girl, the probability that the student scored an ais

45 was divided by a power of ten to get 4.5. what power of ten was it divided by? people 4.5

Which line is parallel to the line that passes through the points (2, –5) and (–4, 1) a. y=-x+5 b. y=-2/3x+3 c. y=2/3x-2 d. y=x+5