In a stack of boards at a lumber yard, the 20th board counting from the top of the stack is immediately below the 16th board counting from the bottom of the stack. how many boards are in the stack?
a. 38
b. 36
c. 35
d. 34
e. 32

In a school 2/3 of the students study a language of those who study a language 2/5 study french

Which of the symbols correctly relates the two numbers below check all that apply 6? 6

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