It is 512 because you have to multiple 64x8=512 you should have figure that out and add 512+2=514 do you get it now ?
Im pretty sure the answer is c. commutative
Answer:

Step-by-step explanation:
Given
and 
Required
Which compares them correctly

This is incorrect because 0.63 is greater

This is also incorrect because 0.63 is greater

This is also correct because 0.63 is greater

This is also incorrect because 0.63 is greater
The answer should be 10 I think, because if u multiply 250 * 4% u get 10.
Hope I'm right.