Answer
$1.5\times10^6\ km$
Work Step by Step
We know that the location of $L_1$ is about .01 the distance between the earth and the sun away from the earth. We know that the earth is $1.5\times10^8 \ m$ away from the sun. Thus, we find that $L_1$ is $1.5\times10^6\ km$ away.
