<span> Compatible numbers are numbers that look nice or friendly with each other when we do mental calculation to estimate a product, but especially a division</span>
Step-by-step explanation:
a = -52 - b / 4
b = -52 - 4a
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three hundred twenty-six thousandths = .326
nine hundred twenty-four thousandths = .924
Hope this helped!! :D
Dot product is
a*b = |a|*|b|*cosα.
In our case
u*u =|u|*|u|*cos 0
u*u =|u|*|u|
12=|u|²
|u|=√12=√(4*3)=2√3
Answer: <span>D. 2√3</span>
