The equation h = -16t^2 +32t + 9 gives the height of the ball, in feet above the ground, at t seconds after the ball is thrown upward. how many seconds after the ball is thrown will it reach its maximum height? what is the maximum height?

answer: b.

step-by-step explanation:

the y coordinate for point b is 0, and answer b is the only one with that y coordinate.

54 kilometers per hour

step-by-step explanation:

according to rules:

1 km = 1000 meter

which means that 1 meter = 1/1000 km

1 hour = 3600 second [ as 1 hour = 60 min = 60 *60 seconds ]

which means that 1 second = 1/3600 hour

therefore, 1 kilometer/hour =

thus to convert 15 meter per second to kilometer per hour, we multiply 15 to 3.6 kilometer/hour.

15 meter/second=   which is the required answer.

believe it or not anna is correct good job anna give me a fist bump there u go gal

do it yourself this is easy

step-by-step explanation: