Determine whether the expression is positive, negative, or zero.
-2
A. positive
B. zero
C. negative
Answer: A
Mathematics
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Solve the problem.The power P (in W) generated by a particular windmill is given by 
where V is the velocity of the wind (in mph). Find the instantaneous rate of change of power with respect to velocity when the velocity is 
A. 5.0 W/mph B. 2.3 W/mph C. 0.3 W/mph D. 10.7 W/mph
Mathematics
Subtract.857
A. 1,291 B. 415 C. 423 D. 323
Mathematics
Multiply.-4(-3)(6)
A. -72 B. 72 C. 172 D. 62
Mathematics
Solve the equation for the specified variable.P = 
for t
A. t = 
B. t = P - rA
C. t = 
D. t = 
Mathematics