A circle has a circumference of 56.52 cm and a radius of 9 cm. What number represents the ratio of the circumference to the radius of this circle?

What is the measure of angle z in this figure? enter your answer in the box. z = ° two intersection lines. all four angles formed by the intersecting lines are labeled. clockwise, the angles are labeled 43 degrees, x degrees, y degrees, and z degrees.

Simplify the expression. -2/5(10+15m-20n)

Identify the type of observational study described. a statistical analyst obtains data about ankle injuries by examining a hospital's records from the past 3 years. cross-sectional retrospective prospective