The distance between a book store and a coffee shop is approximately 5.3 x 10^4 inches. Which of the following is closest to the distance between the book store and a coffee shop, in kilometers? (1 kilometer is approximately 3.9 x 10^4 inches.)	Options.
A) 1.4	B) 2.2	C) 1.9	D) 2.5	E) 2.9
We know that 1 kilometer = 3.9x10^4 inches. Therefore, we now have a ratio of (1 kilometer/3.9x10^4 inches).   We also know that the distance between the book store and a coffee shop is approximately 5.3 x 10^4 inches. To convert inches to kilometers, we need to multiply 5.3 x 10^4 inches by the ratio we just found out.   kilometers = 5.3 x 10^4 inches x (1 kilometer/3.9x10^4 inches) [note: "inches" cancel out, leaving us with just km]   km = 5.3x10^5/3.9x10^4 km   km = 1.36 = 1.4 km   Therefore, we can see that the closest answer is 1.4.
<result>A</result>
The distance between a book store and a coffee shop is approximately 5.3 x 10^4 inches. Which of the following is closest to the distance between the book store and a coffee shop, in kilometers? (1 kilometer is approximately 3.9 x 10^4 inches.)