First, use front end rounding to estimate each answer. Then find the exact answer.Light travels 186,000 miles per second. How many miles does it travel in 
A. estimate: 200,000 ? 800 = 160,000,000 miles; exact: 139,686,000 miles
B. estimate: 200,000 ? 750 = 150,000,000 miles; exact: 139,686,000 miles
C. estimate: 190,000 ? 750 = 142,500,000 miles; exact: 139,686,000 miles
D. estimate: 190,000 ? 800 = 152,000,000 miles; exact: 139,686,000 miles
Answer: A
Mathematics
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