The metric system is based on powers of 10. For example, one kilometer is equal to
1,000 meters or 103 meters. Write each measurement in meters as a power of 10.
a. hectometer (100 meters)
b. megameter (1,000,000 meters)
c. gigameter (1,000,000,000 meters)
d. petameter (1,000,000,000,000,000 meters)