Ariel charges $15 per hour as a babysitter. She rounds every fraction of an hour up to the next half-hour. Write function to represent Ariel's total earnings y after x hours.

A. f(x)= 3[x]
B. f(x)= 2{6x]
C. f(x)= 6[2x]
D. Answer not Available
E. f(x)= [4x]

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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)) =