I need some help on these questions thanks

Use the radius you found in part i (r=26.8 cm) with the surface area formula below to find the surface area of the sphere. show your work and round your answer to the nearest tenth. the surface area of a sphere: sa = 4πr^2 self note: 3.8.4

What is the result of converting 60 ounces to pounds remember there are 16 ounces in a pound

Find the amount of simple interest earned for depositing the given principle in an account if $2200 is invested at 5.5 % for 6 months