When is the estimation of products a useful tool?

Which basic geometric term has no width, no length, and no thickness? line b. point c. angle d. plane

Factor the polynomial. b^2 + 4b + 4

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?