Need help ASAP. Sound waves can be ranked by their intensity, I, given in this formula, where r is the distance from the source of a sound with a power output of P:

4piIr2

Which equation correctly rewrites the formula to solve for I?

Which statement explains how you could use coordinate geometry to prove the opposite sides of a quadrilateral are congruent? a. use the slope formula to prove the slopes of the opposite sides are the same. b. use the slope formula to prove the slopes of the opposite sides are opposite reciprocals. c. use the distance formula to prove the lengths of the opposite sides are the same. d. use the distance formula to prove the midpoints of the opposite sides are the same.