Solve, finding all solutions in [0, 2?).5.6 cos x + 2.8
= 0
A. 
, 
B. 
, 
C. 
, 
D. 
, 
Answer: A
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Find all the second order partial derivatives of the given function.f(x, y) = cos xy2
A. fxx(x, y) = y2 sin xy2; fyy(x, y) = 2[2y2 cos (xy2) - sin (xy2)] ; fyx(x, y) = fxy(x, y) = 2y[y2 cos (xy2) - sin (xy2)]
B. fxx(x, y) = -y4 cos xy2; fyy(x, y) = - 2x[2xy2 cos (xy2) + sin (xy2)]; fyx(x, y) = fxy(x, y) = - 2y[xy2 cos (xy2) + sin (xy2)];
C. fxx(x, y) = - y2 sin xy2; fyy(x, y) = 2[ sin (xy2)- 2y2 cos (xy2)] ; fyx(x, y) = fxy(x, y) = 2y [sin (xy2)-y2 cos (xy2)]
D. fxx(x, y) = - y2 sin xy2; fyy(x, y) = 2y
; fyx(x, y) = fxy(x, y) = 2
Find the value of the indicated variable for the values given.A = P 
nt ; determine A when P = 500, r = 5% , n = 12 and t = 5Round your answer to the nearest hundredth.
A. 620.11 B. 686.91 C. 631.40 D. 641.68
Refer to the double-bar graph below which shows the number of male and female athletes at a university over a four-year period. Solve the problem.
Find the increase in the number of male athletes from year 3 to year 4.
A. 50 B. 75 C. 100 D. 475
Solve the problem. Round to the nearest cent or tenth of a percent.A 22.2% markup based on cost is equivalent to what percent based on selling price (retail)?
A. 82.6% B. 17.4% C. 81.8% D. 18.2%