Calculate the perimeter of a rectangle which is 4.5 metres long and 2 metres wide

Is a positive integer raised to a negative power always positive

The amount spent on food and drink by 20 customers is shown below what is the modal amount spent ?

Adecorative window is made up of a rectangle with semicircles at either end. the ratio of ad to ab is 3: 2 and ab is 30 inches. what is the ratio of the area of the rectangle to the combined area of the semicircles? possible answers: a. 2: 3 b. 3: 2 c. 6: π d. 9: π e. 30: π