How can you get 3/3 -1/6?

What is the exact volume of the cylinder (radius 13 in., height 30 in.)

Which set of reflections would carry trapezoid abcd onto itself? a) x-axis, y=x, y-axis, x-axis b) x-axis, y-axis, x-axis c) y=x, x-axis, x-axis d) y-axis, x-axis, y-axis, x-axis

What would the rule be for the reflection of y=-3