How is the process for finding the volume of a complex three-dimensional figure like the process for finding the area of a complex two-dimensional figure? HELP PLEASE

Asap describe the transformations required to obtain the graph of the function f(x) from the graph of the function g(x). f(x)=-5.8sin x. g(x)=sin x. a: vertical stretch by a factor of 5.8, reflection across y-axis. b: vertical stretch by a factor of 5.8,reflection across x-axis. c: horizontal stretch by a factor of 5.8, reflection across x-axis. d: horizontal stretch by a factor of 5.8 reflection across y-axis.

15/16 as a decimal rounded to the nearest hundredth

Acircle has a circumference of 28.36 units what is the diameter of the circle