Please Help.
Algebra.

Find the area of a parallelogram with base 15 yards and height 21 2/3

Linda loans her friend $250 with a 5% monthly intrest rate. how much was the whole loan?

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.