What is the answer to four with the power of two

The final cost of a sale is determined by multiplying the price on the tag by 75%. which best describes the function that represents the situation?

When 142 is added to a number the result is 64 more times the number my options are 35 37 39 41

Tommy buys a sweater that is on sale for 40% off the original price. the expression p -0.4p can be used to find the sale price of the sweater, where p is the original price of the sweater. if the original price of the sweater is 50, what is the sale price?