8.4 inches
Explanation : The big line in the middle of 8 and 9 is equal to 8.5, but since there is a small unit that is missing, the answer is 8.4.
Answer: Perpendicular.
Step-by-step explanation:
If you multiply the slopes together you will get -1:

<em>Parallel means they have the same slope, so that is easily ruled out here.</em>
The product of r and s raised to the fourth power will be
Because 3x2=6 and 2/3 equals 1/6