Could you show all work to find using formula?

8) A ball is thrown up from the top of a building 55.0 m high. It rises to a maximum height of 20.0 m above the roof. (a) When does it land on the ground below? (b) At what velocity does it land? (c) When is it 20.0 m below the roof?

Imagine a hexagonal or octagonal object. Describe how you could usesuch an object to determine both an upper and lower bound for thevalue of pi. Which object will give bounds closer to the actualvalue and why?

Please provide an example using formulas and calculations

A small sports car and a pickup truck start coaseting down a 10.0 mhill together, side by side. Assuming no friction, what is thevelocity of each vehicle at the bottom of the hill?

Show all work and formulas used.