A motorist is driving across the country at a steady speed at 54.5 miles per hour. In the 17th hour, the odometer on her car reads 62,525. What was the odometer reading when she first started her trip?
a) 62,525 - 54.5(17); 61,598.5 miles
b) 62,525 + 54.5(17); 63,451.5 miles
) 62,525 = a1 + (17-1)(54.5); 61,653 miles
d) 62,525 = a1 -(17-1)(54.5); 63, 397 miles