How many ways can four men and four women can be seat in a row such that no two men sit next to each other

The area of a rectangle is 54x^9y^8 square yards.if the length of the rectangle is 6x^3y^4 yards,which expression represents the width of the rectangle in yards

If the cost to mail a package is an initial $5 and $0.28 for every pound the total cost to mail a package was $11.27, how much did the package weigh?

How long must $542 be invested at a rate of 7% to earn $303.52 in interest? in a easier way