A Mississippi riverboat can travel 75 kilometers downstream in three hours and can make the return trip in five hours. Find the speed of the boat in still water.
?
A. 30 kph
B. 40 kph
C. 20 kph
D. 25 kph
E. 21 kph
Answer: C
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Find the coordinates of the vertices of the polygon in its new position. ? Original coordinates of vertices: (-5, -3), (-3, 6), (-5, -4), (-4, -7) Shift: three units to the right, four units upward ?
A. (-2, 1), (0, 10), (-2, 0), (-1, -3) B. (1, 1), (0, 10), (-2, 0), (-1, -3) C. (2, 1), (0, 10), (-2, 0), (-1, -3) D. (3, 1), (0, 10), (-2, 0), (-1, -3) E. (4, 1), (0, 10), (-2, 0), (-1, -3)
Find the absolute maxima and minima of the function on the given domain.
on the trapezoidal region with vertices 
and 
A. Absolute maximum: 18 at 
absolute minimum: 9 at 
B. Absolute maximum: 12 at 
absolute minimum: 0 at 
C. Absolute maximum: 15 at 
absolute minimum: 9 at 
D. Absolute maximum: 15 at 
absolute minimum: 0 at 
Write the product as a sum or difference of trigonometric functions.2 sin 8x sin 17x
A. cos 9x - cos 25x
B. cos 25x + cos 9x
C. 
(cos 25x + cos 9x)
D. sin 25x + sin 9x
Identify the equation as either an identity or not.tan2x = sec2x - sin2x - cos2x
A. Identity B. Not an identity