Find the slope of a line perpendicular to

A)5/4
B)-5/2
C) 2/5
D)5/2

True or false: the graph of y=f(bx) is a horizontal compression of the graph y=f(x) if b< 1

In the diagram, ab is tangent to c, ab = 4 inches, and ad = 2 inches. find the radius of the circle.

Walking at a constant rate of 8 kilometers per hour, juan can cross a bridge in 6 minutes. what is the length of the bridge in meters?