Astronomers measure large distances in light-years. One light-yearis the distance that light can travel in one year, or approximately 5.88x10^12 miles. Suppose a star is 2.23x10^2 light-years from Earth. In Scientific notation, approximately how many miles is it?A) 2.23x10^14B) 1.31x10^14C) 1.31x10^15D) 5.88x10^12

we have that
One light-year  is-------------------------------- > 5.88x10^12
2.23x10^2 light-years--------------------------- > X
x=(2.23x10^2)*(5.88x10^12)=  13.11x10^14=1.31x10^15 miles

the answer is the option C) 1.31x10^15 miles