Pls im going to fail pls help me

In the coordinate plan (-6,9) b (3,9) c (3,3) def is shown in the coordinate plan below

The scale for a map is 20 miles = 1/2 inch. the distance between two towns on the map is 3 3/4 inches. what is the actual distance between these towns? 150 miles 38 miles 75 miles 135 miles

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