The pH of a solution is given by 
, where 
is the concentration of hydrogen ions (in gram atoms per liter). What is the rate of change of pH with respect to 
style="vertical-align:middle;" /> if 
? Round your answer to two decimal places.
A. 0.20
B. -3.17
C. -25.55
D. 4.07
E. -58.82
Answer: C
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The weight w, in pounds, of a certain animal at age t years satisfies the equation of change 
. For what values of the weight w is the animal losing weight? Round your answer to two decimal places.
?
A. 
pounds
B. 
pounds
C. 2.90 pounds
D. None of the above
Calculate the slope of the line passing through the given points. If the slope is undefined, so state. Then indicate whether the line rises, falls, is horizontal, or is vertical.(-5, 2), (-3, 6)
A. 
, rises
B. - 2, falls
C. 2, rises
D. - 1, falls
Determine whether the given function satisfies a Laplace equation.f(x, y, z) = 4x + 7y3z2
A. No B. Yes
Determine whether the following is a proportion.
= 
A. No B. Yes