How do I solve 5 log x equals negative 15

In the diagram, the measure of angle 9 is 85° which angle must also measure 85°?

Which of these tables represents a non-linear function?

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.