Give the angle measure represented by 4.5 rotations counterclockwise. a. -1620°
c. -810°
b. 1620°
d. 810°
BRES
Please select the best answer from the choices provided

Find the gradient of f(x,y,z)equals=left parenthesis x squared plus y squared plus z squared right parenthesis superscript negative 1 divided by 2 baseline plus ln left parenthesis x right parenthesis x2+y2+z2−1/2+ln(xyz) at the point left parenthesis negative 2 comma 1 comma negative 2 right parenthesis(−2,1,−2).

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angle measure.

Need so much on this one how many yards?