What is the cross-sectional area of the shaded ring? πb2 – πr2, or π(b2 – r2) πb2 + πr2, or π(b2 + r2) πr2 – πb2, or π(r2 – b2) πr2 + πb2, or 2π(r2 + b2)

Solve the problem by making up an equation. a man could arrive on time for an appointment if he drove the car at 40 mph; however, since he left the house 15 minutes late, he drove the car at 50 mph and arrive 3 minutes early for the appointment. how far from his house was his appointment?