Sam hits a golf ball. The golf ball's height is modeled by the equation below where h(t) is the height in feet and t is the time in seconds after the golf ball is hit. When did the ball
reach its maximum height? Write your answer as a decimal.
h(t) = -3t2 + 3t + 12,

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.

mr. india