Translate the sentence into a mathematical equation. Be sure to identify the meaning of all symbols.The surface area of a sphere is 4? times the square of the radius.
A. If S represents the surface area and r the radius, then S = 4?r2.
B. If S represents the surface area and r the radius, then S = ?r2.
C. If S represents the surface area and r the radius, then S = 4?r.
D. If S represents the surface area and r the radius, then 4?S = r2.
Answer: A
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Solve the problem. Round to the nearest tenth.The roof of a building is in the shape of the hyperbola 9y2 - x2 = 11, where x and y are in meters. Refer to the figure and determine the height, h, of the outside walls.
a = b = 3 m
A. 1.5 m B. 4.5 m C. 2.2 m D. 20 m
Solve. Give your answer as a mixed number if appropriate.
= 
A. 99
B. 2
C. 33
D. 
Evaluate the expression.310 - 32 ? 24 ÷ (4 ? 3 - 2 ? 2)
A. 903 B. 288 C. 598 D. 283
Provide an appropriate response.Find a cofunction equivalent to csc 67°.
A. sin 67° B. sec 157° C. sec 23° D. sec 67°