Find an equation of variation for the given situation.y varies directly as the square of x, and y = 28.35 when x = 9.
A. y = 1.92x2
B. y = 0.35x2
C. y = 0.39
D. y = 0.4x2
Answer: B
Mathematics
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How is dc/dt related to da/dt and db/dt?
A. 
= 2a
+ 2b
B. 
= a
+ b
C. 
= 
D. 
= a2
+ b2
Mathematics
Divide using the quotient rule for exponents. Write the result with positive exponents. Assume that variables in the denominator are not equal to 0. - 
A. - 
B. - 
C. - 
D. - 
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Multiply and simplify.
? 
A. 
B. 
C. 
D. 
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Find the GCF of 40, 45, and 50.
A. 10 B. 8 C. 1 D. 5
Mathematics