Please Help Me! If you can, please provide explanation

Lines CD and CE are tangent to circle a. If m∠DAE = 140°, what is the measure of ∠DCE?

80°

140°

40°

220°

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.