Solve the problem.The power P (in horsepower) that a ship needs can be modeled by 
where d is the ship's displacement (in tons), s is the normal speed (in knots), and c is the Admiralty coefficient. If a ship displaces 35,600 tons, has a normal speed of 20 knots, and has an Admiralty coefficient of 230, how much power does it need?
A. about 234,000,000 horsepower
B. about 37,600 horsepower
C. about 2.2e+09 horsepower
D. about 3760 horsepower
Answer: B
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Identify the figure and denote it by its appropriate symbol.
A. Ray, 
B. Line, 
C. Line Segment, 
D. Ray, 
Solve the application and answer with a complete sentence. Round to the nearest tenth of a percent if necessary.On a biology test, a student got 25 questions correct but did not pass. On a second attempt, the student got 36 questions correct. What was the percent of increase?
A. There was a 44% increase. B. There was a 56% increase. C. There was a 11% increase. D. There was a 30.6% increase.
Solve the right triangle ABC with C = 90°. Your answer should give an angle in decimal degrees when given an angle in decimal degrees and in degrees and minutes when given an angle in degrees and minutes. Use the rules for significant digits.A = 71.2°, c = 9.03 cm
A. B = 28.8°, a ? 8.55 cm, b ? 2.91 cm B. B = 28.8°, a ? 2.91 cm, b ? 8.55 cm C. B = 18.8°, a ? 2.91 cm, b ? 8.55 cm D. B = 18.8°, a ? 8.55 cm, b ? 2.91 cm
Determine the vertex, focus, and directrix of the parabola and sketch its graph.y2 + 6y = 12x + 51
A. vertex: (-5, -3)
focus: (-8, -3)
directrix: x = -2
B. vertex: (-5, -3)
focus: (-2, -3)
directrix: x = -8
C. vertex: (-5, -3)
focus: (-5, 0)
directrix: y = -6
D. vertex: (-5, -3)
focus: (-5, -6)
directrix: y = 0