Pls help pls
10 POINTS pls

What is the radius of a circle with an area of 78.5 cubic inches? use 3.14 for pie

You eat $0.85 for every cup of hot chocolate you sell. how many cups do you need to sell to earn $55.25

$30 to spend on dinner tax and gratuity at mos restaurant rax is 6% and they give a 15% tip on the total bill after taxes thier dinner cost $21 which statement correctly explains wether andrew and kate have enough money to pay their bill