Find the partial derivative.f(x, y) = e2xy. Find 
.
A. fx(x, y) = 2ye2x
B. fx(x, y) = 2e2xy
C. fx(x, y) = 2ye2xy
D. fx(x, y) = 2(x + y)e2xy
Answer: C
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Find the fraction equal to the given decimal.0.77777 . . .
A. 
B. 
C. 
D. 
Solve the problem.A repair company's charge for repairing a certain type of copy machine fits the model 
where y is the amount charged in dollars and x is the number of minutes the repair person is on the job. How many minutes would it take for the cost of repair to reach $130? (Round to the nearest minute.)
A. 13 min B. 134 min C. 287 min D. 203 min
Solve the problem.In a certain city, the cost of a taxi ride is computed as follows: There is a fixed charge of $2.85 as soon as you get in the taxi, to which a charge of $1.95 per mile is added. Find an equation that can be used to determine the cost, C(x), of an x-mile taxi ride.
A. C(x) = 2.85 + 1.95x B. C(x) = 4.80x C. C(x) = 1.95 + 2.85x D. C(x) = 3.30x
Solve the equation.19t - 47 = 7t - 15
A. - 
B. - 
C. - 
D. 