Please help and NO LINKS I WILL REPORT An angle measures 7/9ₙ radians. What is the degree measure of the angle?

A.) 2.44°
B.) 140°
C.) 280°
D.) 439.6°

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

If the ratio of sum of the first m and n terms of an ap is m2 : n2 , show that the ratio of its mth and nth terms is (2m − 1) : (2n − 1).

Asap! i'm not good math and i'm lost.