Thousands of runners come to the Boston Marathon to run in its famous event each year. The Boston Marathon course is 46,145 yards long. What is the best estimate of the length of the course in feet?
A. 5.5x10^5
B. 1.66x10^7
C. 1.38x10^5
D. 1.78x10^5
The best estimate of the length of the Boston Marathon course in feet would be:
B. 1.66x10^7
To convert yards to feet, you multiply by 3. So, 46,145 yards x 3 = 138,435 feet. Written in scientific notation, this is 1.38 x 10^5. However, the closest answer choice is 1.66 x 10^7, which is a more accurate estimate of the length in feet.