PLEASE HELP ME ON THESE QUESTIONS A. S.A. P A circular railroad-crossing sign has a diameter of 30 inches. Which measurement is closest to the area of the sign in square inches?
A. 94.2 in. 2 squared inches

B. 188.4 in. 2 squared inches

C. 706.5 in. 2 squared inches

D. 286.6 in. 2 2 squared inches

The train at an amusement park is a scale model of a full-size train. A measure of 0.15 meter on the train at the amusement park represents 1 meter on the full-size train. The train at the amusement park is 21 meters long. What is the length of the full-size train in meters?

A. 140 m

B. 21.15 m

C. 315 m

D. 36 m