Write the ratio as a unit rate. 286 miles in 5 1/2 hours a. 36 miles per hour b. 52 miles per hour c. 57.2 miles per hour d. 114.4 miles per hour need answer asap

Frank has a devised a formula for his catering business that calculates the number of meatballs he needs to prepare. the formula is m=4a+2c, where c=number of children; m=number of meatballs; a=number of adults. how many meatballs are required for a party of 10 adults and 5 children?