All ball is thrown into the air with an upward velocity of 24 ft/s. its height h in feet after t seconds is given by the function h=-16t^2+24t+7. a. in how many seconds does the ball reach its maximum height? round to the nearest hundredth if necessary. b. what is the ball's maximum height?

t=¬b2a; this would be a much easier method. a=¬16 and b=24. We simply plug these values into, followed by simplifying the t value for the time, and then insert this value into h(t) for the height at t. This is one of the ways of determining the maximum of a quadratic function. 

to plot points   for x just start at the origin (middle) and go to the left however many times it say(if the number is a positive) if the number is a negative then go right however many times it says if it is 0 go nowhere

now keep you pencil there and go up however many times it says on y(if it is positive) if it is negative then go down however many times it says. if it says 0 go nowhere.

you have just plotted a point! now when you finish plotting all of them connect them with a ruler

plot each point as (-3, 7), (0,4), (3,1), (8,-4)   in the parenthesis on the left of the comma is x and the right is y.