The area of a square is: A = s^2
With side being s = 20m
A = 20^2m^2 = 400m^2
Hope that helps! :)
Answer:

Step-by-step explanation:
In scientific notation, the national debt in 2013 was approximately

You can see this by taking the decimal point between the 1 and 6 and moving it 13 places to the right.
The smallest power of 10 that will be larger than this number is
.
Answer:
choice B
Step-by-step explanation:
7/28 as a decimal would be 0.28
The proportion is 1:10. You can get this by dividing both 50 and 500 by 50.