Yesterday, grace drove 33 1/3 miles. She used 1 1/4 gallons of gasoline. What is the unit rate for miles per gallon? this little hint might help you figure it out : What you need to do is to write the mixed numbers as improper fractions.

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.