The manager of a fast-food restaurant determines that the average time that her customers wait for service is 1.5 minutes. (a) find the probability that a customer has to wait more than 4 minutes. (round your answer to three decimal ) find the probability that a customer is served within the first minute. (round your answer to three decimal ) the manager wants to advertise that anybody who isn't served within a certain number of minutes gets a free hamburger. but she doesn't want to give away free hamburgers to more than 2% of her customers. what number of minutes should the advertisement use? (round your answer to the nearest minute.)

Someone answer asap for ! a discount store’s prices are 25% lower than department store prices. the function c(x) = 0.75x can be used to determine the cost c, in dollars, of an item, where x is the department store price, in dollars. if the item has not sold in one month, the discount store takes an additional 20% off the discounted price and an additional $5 off the total purchase. the function d(y) = 0.80y - 5 can be used to find d, the cost, in dollars, of an item that has not been sold for a month, where y is the discount store price, in dollars. create a function d(c(x)) that represents the final price of an item when a costumer buys an item that has been in the discount store for a month. d(c(x)) =

Which function has an inverse function? a.f(x)= |x+3|/5 b. f(x)= x^5-3 c. f(x)= x^4/7+27 d. f(x)= 1/x²

Isabel graphed the following system of equations. 2x – y = 6 y = -3x + 4 she came up with the solution (2,-2). what were the 3 steps she did to get that solution? (make sure they are in the correct order)