X-time
linear word problems
cost
speedy printing charges $23 for 200 deluxe business cards and $35 for 500 deluxe business
cards. assume that the cost is a linear function of the number of cards printed.
a) find a linear formula for the cost as a function of the number of cards printed.
b) what information does the y-intercept convey?
c) using the function from part a, determine the cost for printing 700 cards.

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.