Solve the problem.An airplane flies 440 miles with the wind and 330 against the wind in the same length of time. If the speed of the wind is 40, what is the speed of the airplane in still air?
A. 270 mph
B. 120 mph
C. 280 mph
D. 285 mph
Answer: C
Mathematics
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Change the Cartesian integral to an equivalent polar integral, and then evaluate.
A. 
B. 
C. 
D. 
Mathematics
Evaluate the expression.(3.8) 3
A. 548.72 B. 5.4872 C. 54.872 D. 11.4
Mathematics
Find the vertex and axis of symmetry of the graph of the function.f(x) = -4x2 - 2x - 9
A. 
; x = 
B. 
; x = - 
C. (4, -9); x = 4
D. 
; x = -4
Mathematics
Suppose that the graph of 
is drawn on a coordinate grid where the unit of measurement is an inch. How many miles to the right of the origin do we have to move before the height of the curve reaches 2 ft.
What will be an ideal response?
Mathematics