John spent about 12 hours at a water park. He estimated he spent about 40% of the time waiting in line. What would be a reasonable amount of time he spent in line?

Acomputer store buys a computer system at a cost of $370.80. the selling price was first at $ 618, but then the store advertised a 20 % markdown on the system. answer parts a and b. a. find the current sale price.