Area of circle 6mm(radius) in terms of pi

In a graph with several intervals o data how does a constant interval appear? what type of scenario produces a constant interval?

Satchi found a used bookstore that sells pre-owned dvds and cds. dvds cost $9 each, and cds cost $7 each. satchi can spend no more than $45.

Janet is rolling a number cube with the numbers one through six she record the numbers after each row if she rolls of keep 48 times how many times should she expect to roll a 4