Mackenzie runs around a circular track 4 times. If the track has a radius of 40 feet, how far did Mackenzie run?

Answer this question, only if you know the answer. 30 points and brainliest!

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.

The square root of 9x plus 7 plus the square rot of 2x equall to 7