Find the domain of the function of two variables.f(x, y) = 
A. {(x, y)| y ? -8x2}
B. {(x, y)| y ? 8x2}
C. {(x, y)| y ? -8x2}
D. {(x, y)| y ? 8x2}
Answer: D
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Determine the number of significant digits in the given approximate number.0.070080
A. 6 B. 5 C. 3 D. 2
Write the expression as a single logarithm. Leave your answer in simplest form without negative or fractional exponents.log4 m + log4(13m - 10)
A. log4(13m2 - 10m)
B. log4 
C. log4(m2 + 13m - 10)
D. log4 
Solve.An investor has three stocks which pay 2%, 6%, and 9% each. He has three times as much invested at 6% as at 2% and $700.00 more invested at 9% than at 2%. If the total return from the investments is $556.00 at the end of the year, find the amount invested at rate 6%?
A. $2400 B. $1000 C. $5100 D. $1700
Graph the equation.y = (x + 2)2
A. 
B. 
C. 
D. 