Estimate the circumference of a circle that has a diameter of 13 yards.

Is a positive integer raised to a negative power always positive

6cm10 cma conical paper cup has dimensions as shown in the diagram. how much water can the cup hold when full?

Use mathematical induction to prove the statement is true for all positive integers n, or show why it is false. 1^2 + 4^2 + 7^2 + + (3n - 2)^2 = [n(6n^2-3n-1)/2]