Let f (x) = 2x and g(x) = 23/2. Find (f9) (x). Then evaluate the product when x = 9.

4a. is 3 miles every hour

4b. is 1/3 of an hour per mile

step-by-step explanation:

first, you divide the triangle in two, tô form a retangle triangle. after, using pythagoream theorem:

18^2 = 14^2 + (x/2)^2

(x^2/4) + 196 = 324

x^2/4 = 324 - 196

x^2/4 = 128

x^2 = 512

x = √512

x = √2^9

x = 16√2 cm

i hope i you.