James mows lawns for $10 a yard and trims trees for $22 a tree. he needs to make at least $388 to go on the spring band trip. let y represent the number of yards he mows and t represent the number of trees he trims. which expression below describes the number of yards and trees that james must mow and trim to make at least the amount he needs?
a. 10y 22t < 388
b. (10 22)(y t) > 388
c. (10 22)(y t) < 388
d. 10y 22t > 388