Pls Pls Pls help! Simplify the equation:

What is the point of inflection for the function f(x)=2cos4x on the interval (0, pi/2)

The equation represents the function f, and the graph represents the function g. f(x)=3(5/2)^x determine the relationship between the growth factors of f and g. a. the growth factor of g is twice the growth factor of f. b. the growth factor of f is twice the growth factor of g. c. the growth factor of f is 2.5 times the growth factor of g. d. the growth factor of f is the same as the growth factor of g.

How do you write 0.5% as a fraction