First, rewrite the equation so that <em>y</em> is a function of <em>x</em> :

(If you were to plot the actual curve, you would have both
and
, but one curve is a reflection of the other, so the arc length for 1 ≤ <em>x</em> ≤ 8 would be the same on both curves. It doesn't matter which "half-curve" you choose to work with.)
The arc length is then given by the definite integral,

We have

Then in the integral,

Substitute

This transforms the integral to

and computing it is trivial:

We can simplify this further to

In this case if x<100 George will be losing money. So he will only earn a profit when he sells more than 100 DVDs. Essentially (x-100) represents his break-even point.
Final Answer: 
Steps/Reasons/Explanation:
Question: Solve the equation
.
<u>Step 1</u>: Divide both sides by
.

<u>Step 2</u>: Simplify
to
.

<u>Step 3</u>: Subtract
from both sides.

<u>Step 4</u>: Simplify
to
.

<u>Step 5</u>: Divide both sides by
.

~I hope I helped you :)~
Answer:
4√3
Step-by-step explanation: