Step-by-step explanation:
<h2>
2.3 x 107 J is your correct Answer</h2>
Here is your inequality.
n - 8 < 10
Add 8 to each side.
n < 18
The z-score of 30,000 is -2. Reference to a normal standard distribution table shows that 97.72% of tires will have a life of at least 30,000 miles.

The area of the square can be expressed as

So to go back to the side length, you just need to find the square root of the area.