A Champion Athlete Can Produce One Horsepower (746 W) for a Short

A champion athlete can produce one horsepower (746 W) for a short period of time. If a 70-kg athlete were to bicycle to the summit of a 500-m high mountain while expending power at this rate, she would have used at least ____ J of energy.

A) 746
B) 3.43 × 10⁵
C) 3.73 × 10⁵
D) 7.46 × 10⁵
E) 2.61 × 10⁷