Simplify the expression. Write the answer using scientific notation.
Astronomers measure large distances in light-years. One light-year is the distance that light can travel in one year, or approximately 5,880,000,000,000 miles. Suppose a star is 14.4 light-years from Earth. In scientific notation, how many miles away is it?
8.4672 x 10^13 miles
5.88 x 10^12 miles
1.44 x 10^12 miles
5.88 x 10^13 miles