Hi there! ;) The answer to your question is 0.85 or 85%. I got the answer because I divided 66/78(66 divided by 78) which equals 0.845 but I rounded it because 5,6,7,8,9 means round up.
Hope I helped! :D
Answer:
44
Step-by-step explanation:
Trust
6mm
radius = 1/2 of diameter
c = 40d+20
He has to pay 20 dollars and that can't multiply so the forty has to multiply and it would have to be by d because c is the total cost