When John bought his new computer, he purchased an online computer help service. The help service has a fee of $25.50 and a $10.50 charge for each help session that he uses. John has budgeted $170 for the computer help service. What is the maximum number of sessions he can use? Write and solve an inequality to find the maximum number of sessions he can use. Show your work.

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.