Question

light from the sun travels to he earth at a speed of 1.86x10^5 miles/second. how much time will it take to cover a distance of 9.2x10^7 miles? write your answer in scientific notation and round so the first factor goes to the hundredths place

Answer 1

round figure- 500s, original- 494.6236559s

Explanation:

`1.86 * {10}^(5)miles = 1sec \\ 9.2 * {10}^(7) miles = \frac{1.86 * {10}^(5) }{9.2 * {10}^(7) } \\ = 500 \: seconds < 2 \: significant \: figures >`