The parabolic path of a basketball being shot into a hoop can be modeled by the equation y=9+12x - 3x^2 , where x represents the amount of elapsed time, in seconds, and y represents the height of the ball in meters. What is the maximum height that the ball reaches? How many seconds does it take to reach its highest point? How high is the ball after 3.1 seconds? How long does it take the ball to reach a height of 15 meters?

she played for 18.75 hours.

step-by-step explanation:

if she played 2/4 of a hour on tuesday. and there is 60 minutes in an hour and 60 divided by 4 is 7.5. and she played 2/4 of an hour on thursday then again 60 divided by 4 is 7.5, you add 7.5+7.5=56.25. now you have to do 1/4 of an hour, it equals 3.75. now you have to add them all up. 3.75+7.5+7.5=18.75

i hope this and i hope you get it right. it took me a while to get this done for you. : )