4. Liza wants to have more than $750 in her savings account before she will leave for college.
Right now she has $300, and she is going to
babysit to earn $12.00 an hour. How
many
hours
will Liza need to babysit before she leaves for
college?

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.