Find the derivative of y with respect to x.y = tan-1 

A.
B.
C.
D.


Answer: A

Mathematics

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Solve the problem.The wind is blowing at 10 knots. Sailboat racers look for a sailing angle to the 10-knot wind that produces maximum sailing speed. In this application, (r, ?) describes the sailing speed r, in knots, at angle ? to the 10-knot wind. Four points in this 10-knot-wind situation are (6.5, 65°), (7.5, 85°),  and . Based on theses points, which sailing angle to the 10-knot wind would you recommend to a serious sailboat racer? What sailing speed is achieved at this angle?

A. 85°; 7.5 knots B. 65°; 6.5 knots C. 110°; 7.6 knots D. 135°; 7.4 knots

Mathematics

Solve the problem.From April through December 2000, the stock price of QRS Company had a roller coaster ride. The chart below indicates the price of the stock at the beginning of each month during that period. Find the monthly average rate of change in price between June and September.

A. $11.00 per month B. -$7.33 per month C. $7.33 per month D. -$11.00 per month

Mathematics

Find the axis of symmetry of the parabola defined by the given quadratic function.f(x) = -7(x - 3)2 - 9

A. x = 3 B. x = -3 C. x = -9 D. x = -7

Mathematics

Write the expression as a sum and/or a difference of logarithms with all variables to the first degree.log 7w(v + 4)

A. log 7 + log w + log (v + 4) B. log 7w + log 7v + log 28 C. 7 log w + log (v + 4) D. log 7 + log w + log v + log 4

Mathematics