The radius of a circle is 8 inches. find the number of radians in the central angle of the circle which interprets an arc of 4 inches

Find parametric equations for the line. (enter your answers as a comma-separated list of equations. let x, y, and z be functions of t.) the line in the direction of the vector 5 i + 5 j − 6k and through the point (−4, 4, −2).

The solution set for 5v2 – 125 = 0 is

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