.A toy rocket is launched from a 4.9 m high platform in such a way that its​ height, h​ (in meters), after t seconds is given by the equation h=−4.9t2+33.6t+4.9. How long will it take for the rocket to hit the​ ground?
he toy rocket will hit the ground after approximately enter your response here seconds.

2.The length of a rectangle is 7 centimeters less than five times its width. Its area is 24 square centimeters. Find the dimensions of the rectangle.
The width is enter your response here cm.
Part 2
The length is enter your response here cm.

3.Jeff and Kirk can build a​ 75-ft retaining wall together in 10 hours. Because Jeff has more​ experience, he could build the wall by himself 1 hour quicker than Kirk. How long would it take Kirk​ (to the nearest​ minute) to build the wall by​ himself?
It will take Kirk approximately enter your response here hours enter your response here min to build the wall himself.
​(Round to the nearest minute as​ needed.)


4.On the last three physics exams a student scored 87​, 85​, and 91. What score must the student earn on the next exam to have an average of at least​ 90?

The student must score at least enter your response here​%.