The radius of a circle with radius 18 m is multiplied by 1/2 . What happens to circumference and area? Thanks so much I need the answer ASAP. :)

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.

What is the value of x when x + 7 = 21?

Which of the following three dimensional figures has a circle as it’s base