Find the circumference(perimeter) of a circle with the given radius. give answers correct to one decimal place. r=4cm
can you guys explain how to get the answer?
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Simplify.7x + 3y - 2 + 6x + 1 + y squared 2 you! ; )

The base of a triangle is 8 1 3 meters and the height of the triangle is the fourth root of 16 meters meters. what is the area of the triangle?

Prism m and pyramid n have the same base area and the same height. cylinder p and prism q have the same height and the same base perimeter. cone z has the same base area as cylinder y, but its height is three times the height of cylinder y. the figures and have the same volume.