The measure of central angle RST is r radians. What is the area of the shaded sector?

A. 41π units^2
B. 8π units^2
C. 16π units^2
D. 20π units^2​

What is the range of the function? f(x)=-2|x+1|? a. all real numbers. b. all real numbers less than or equal to 0. c. all real numbers less than or equal to 1. d. all real numbers greater than or equal to 1