Promethium has a half-life of 18 years. The equation A=200(12)1t can be used to find the amount, A, of promethium left after t years. Initially, there are 200 milligrams. Over the first 18 years, what is the average amount of promethium lost per year? Round your answer to the hundredths place.

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.