Work out the percentage change to 2 decimal places when a price of £60 is increased to £89.99

Monica build a remote control toy airplane for science project to test the plane she launched it from the top of a building the plane travel a horizontal distance of 50 feet before landing on the ground a quadratic function which models the height of the plane in feet relative to the ground at a horizontal distance of x feet from the building is shown

Can anyone me with 32,33,36,37,and 40.

Find the midpoint m of z1=(8+5i) and z2=(12+3i)