Viewing moving objects from pond water under his microscope and named then animalcules

Aball is thrown straight up into the air with a speed of 21 m/s. if the ball has a mass of 0.1 kg, how high does the ball go? acceleration due to gravity is g = 9.8 m/s^2. a. 22.5 m b. 20.0 m c. 25.0 m d. 17.5 m

Could someone . i have tried to solve myself but my calculation is off

If the ama of the inclined plane below is 2, calculate the ima and efficiency. ima = efficiency =