Answer:
42300000
Step-by-step explanation:
Use known fact

Consider 1 square kilometer:

So, to find the answer, you have to multiply given number of square kilometers by 1000000:

Angle WXY is 100 degrees. You add angle WXZ and angle ZYX and you get 100. 60+40=100
Can't see what it is about
You're looking for the number 13 and 7 can go into.
You can use the listing method.
13: 13, 26, 39... and so on, and so on.
7: 7, 14, 21, 28, 35, 42, 49.... and so on.
An easier way to do it is to simply multiply 13 by 7.

13 and 7 can go into 91, evenly.
Hope this helped!
She will donate 24 books to the library. (I don't know how you would model it, I assume you do.)