It cost andrea $50 per day to rent a moving truck and an additional $3 for every mile that she drove it. if andrea spent a total of $104 after renting the truck for 1 day, which equation shows how many miles andrea drove?

a. 3+50x=104

b. 3x+104=50

c. 50+3x=104

d. 104/3=50x

An office supply company conducted a survey before marketing a new paper shredder designed for home use. in the survey, 80 % of the people who tried the shredder were satisfied with it. because of this high satisfaction rate, the company decided to market the new shredder. assume that 80 % of all people are satisfied with this shredder. during a certain month, 100 customers bought this shredder. find the probability that of these 100 customers, the number who are satisfied is 69 or fewer.