Answer:
Angela, by 3 ft² per hour
Step-by-step explanation:
Jeff can paint 4 times the area in 4 times the time, so
... (4×28 ft²)/(4×15 min) = 112 ft²/(60 min) = 112 ft²/h
Since 115 ft²/h is more than 112 ft²/h (by 3 ft²/h), Angela is the faster painter.
