6th Grade Math: The marked price of a water cooler is $4650. The shopkeeper offers an off-season discount of 18% on it. Find its selling price.

If 25% of y is 30, what is 60% of y?

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.

If the value of cos330°is√3/2 then find cos 165°.