Nora borrowed $5000 from the bank to buy a car. Her interest paid over the course of the 3 year loan was $750. What was the interest rate? help me

How can you tell when x and y are not directly proportional?

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.

The area of each triangle is 7 square units. the surface area of the triangular prism is