PLZ HELP Write an exponential equation in the form f (x) = ab^x. A DVD loses of its value every year it is
in the store. The DVD costs new. Write a function that represents its value in years. What is it
worth after 4 years?

The perimeter of a rectangle is greater than or equal to 74 meters. if the length is 25 meters, the minimum width of the rectangle is meters.

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.

Given sin28.4=.4756, cos28.4=.8796, and tan28.4=.5407 find the cos of 61.6