An athletics squad trains on a long straight track with dots marked at 10m intervals. the coach sets out cones on some of the dots for the squad's sprint training drills. she wants the squad to be able to run any distance which is a multiple of 10m, up to some maximum distance which depends on the number of cones. explain why it is not possible to place four cones a, b, c, d, in a line so that each multiple of 10m up to 70m can be run between two of the cones.

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)) =