Which describes a situation when an exact answer is appropriate?
a. margo buys a sweater for $15.98 and a pair of socks for $1.98. she has $20 and wants to know if she has enough money to buy the sweater and socks.
b. barry wants to buy 3 movie tickets for himself and his friends. each ticket costs $8.75. he has $40. the cashier wants to know how much change to give barry.
c. jeremy wants to make lb burgers for each of his 12 friends. he buys three packages of ground beef weighing lb, lb, and 2 lb. does jeremy need to buy more ground beef?
d. renaldo wants to make 3 cushions that take 89.9 cm of trim each. he has 300 cm of trim. does he have enough trim to make the cushions?