Answer:

Step-by-step explanation:
This book has 500 pages in total.
We should split up the place values.
1 - 9
One only appears once.
1
10 - 19
One appears 11 times.
1 + 11
20 - 99
One only appears 8 times.
1 + 11 + 8
Add:
1 + 11 + 8
=> 20
Since the same is for 200-299, and so on. Let us add twenty four times.
20 * 4
=> 80
Looking back to 100-199, there are 120 ones.
Add:
120 + 80
=> 200
Answer:
is<u> Rational</u> because<u> it's a non-perfect square</u>
8
You multiply the numbers
2.5*7 = 17.5. If it's easier for you, multiply 2.5 by 5 then add 2.5*2.
6x - 2x = 16
4x = 16 |divide both sides by 4
<h3>x = 4</h3>