Solve the problem.Evaluate 
at t = 3 for the function w = exyz2; x = t, y = t, z = 
.
A. 
e
B. 0
C. - 
e
D. 
Answer: B
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Use implicit differentiation to find the specified derivative at the given point.Find 
at the point (1, 4, e5) for ln(xz)y + 3y3 = 0.
A. - 
B. - 
C. 
D. 
Solve the problem.Suppose f(x) = 31.2 + 1.3 log(x + 1) models salinity of ocean water to depths of 
at a certain latitude. x is the depth in meters and f(x) is the salinity in grams of salt per kilogram of seawater (expressed as parts per thousand or ppt). Approximate the salinity, to the nearest hundredth, when the depth is 346 meters.
A. 77.96 ppt B. 80.56 ppt C. -27.90 ppt D. 34.50 ppt
Solve the system by the substitution method.xy =12x + y =7
A. {(4, 3), (3, 4)} B. {(4, -3), (3, -4)} C. {(-4, 3), (-3, 4)} D. {(-4, -3), (-3, -4)}
Provide an appropriate response.The following table lists the population change over a 20-year period for selected countries. Which of these countries had the largest increase in population during this period? 
A. Z B. W C. Y D. X