The Great Wall of China, built in the 7th century BCE, is about 1 x 10^4 miles long. The Panama Canal, built over 2 thousand years later, is about 5 x 10^1 miles long. Use these numbers to complete the sentence below. Write your answer in standarered form, without using exponets. The Great Wall of China is about ____ times longer then the Panama Canal what is the answer?
