Step-by-step explanation:
b²-4ac
(10)²-4(-4)(-8)
=100+16+32
=148
Answer:
1- 80,000
2- 900,000
3- 300,000,000
4- one hundred three million seven hundred twenty-seven thousand thousand four hundred ninety-five
Hope this helps! :)
<h3>
Answer: 50.24</h3>
Work Shown:

The area of the circular button is roughly 50.24 square mm.