Paul hits a baseball straight up in the air. The baseball is hit with an initial velocity of 70 ft/s when it is 3.5 ft off the ground. 1) What is the ball's initial velocity?
2)What is the ball's initial height?
3)Write a quadratic function that models motion of the baseball
4)At what time does the ball reach the maximum height?
5) What is the maximum height the ball can reach?
PLEASE ANSWER QUICK WILL GIVE BRAINLIEST

As part of your daily workout, you lie on your back and push with your feet against a platform attached to two stiff springs arranged side by side so that they are parallel to each other. when you push the platform, you compress the springs. you do an amount of work of 79.0 j when you compress the springs a distance of 0.230 m from their uncompressed length. (a) what magnitude of force must you apply to hold the platform in this position? (b)how much additional work must you do to move the platform a distance 0.230 m farther? (c) what maximum force must you apply to move the platform a distance 0.230 m farther?