60% of the cost price and 40% of the selling price are equal. find the profit or loss percentage​

Find the slope of a line given the following two points

Suppose that one doll house uses the 1 inch scale, meaning that 1 inch on the doll house corresponds to 1/2 foot for life-sized objects. if the doll house is 108 inches wide, what is the width of the full-sized house that it's modeled after? in inches and feet.

Simplify (1/2)4th power a. (1/16) b.(1/8) c.(1/4)