Find the partial derivative.f(x,y) = 2x + 3x2y2 - 4y2. Find fx(x, y).
A. 6xy2 - 8y
B. 6x2y - 8y
C. 2 + 6xy2
D. 2 + 6x2y
Answer: C
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Use ?, ?, ?, or both ? and ? to make a true statement.{13, 14, 15} {13, 14, 15}
A. ? B. ? and ? C. ? D. ?
Add. Do not use a number line except as a check.2.3 + (-6.4)
A. 8.7 B. -8.7 C. -4.1 D. 4.1
Solve the problem.A plastic rod used in manufacturing boats must be rejected if it differs in length from the standard length, s, by 0.13 inches or more. If the length of a rod is denoted by l, engineers express this relationship as 
. What are the values of l for which the part will be rejected, if the standard length is 14.10 inches?
A. l ? 13.97 or l ? 14.23 B. l ? 13.95 or l ? 14.24 C. l ? 14.23 D. 13.97 ? l ? 14.23
Provide an appropriate response.According to data collected during one year in a large metropolitan community, 30% of commuters used public transportation to get to work, and this rose by 4% the following year. This is modeled by the transition matrix 
M = 
where P represents the percentage of people that use public transportation and P' the percentage of people that do not. Let S0 = [0.3 0.7]. Find S2.Round your answer to the nearest thousandths.
A. [0.372 0.628] B. [0.628 0.372] C. [0.66 0.34] D. [0.34 0.66]