Hannah's school hosted a book donation. There are 150 students at her school, and they donated a total of b books! Hannah donated 3 times as many as the average number of books each student donated. How many books did Hannah donate?

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

In the sixth grade 13 out of 20 students have a dog if there are 152 sixth grade students how many of them have a dog

In the diagram, ab is tangent to c, ab = 4 inches, and ad = 2 inches. find the radius of the circle.