Your family decides to go out to dinner to celebrate your brothers graduation from high school. The family's meal cost $75. Your waitress did a great job and
your parents decide to leave her a 20% tip. How much tip money should your
parents leave her if they leave her 20%? And what is the total cost of the meal?*

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.