Please solve with explanation I’ve been asking for a long time (20 points)

In the figure shown below, m < 40 and ab =8. which equation could be used to find x?

Acomputer store bought a program at a cost of $10 and sold it for $13. find the percent markup

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.