mary had five and one-half dollars. she spent two and one-fourth dollars on a snack. how much money does mary have left?

3 1/4
3 1/2
2 1/4
none of the choices are correct.

Subscriptions to a popular fashion magazine have gone down by a consistent percentage each year and can be modeled by the function y = 42,000(0.96)t. what does the value 42,000 represent in the function?

The graph of h(x)= |x-10| +6 is shown. on which interval is this graph increasing

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.