If A denotes the area of the sector of a circle of radius r formed by the central angle ?, find the missing quantity. If necessary, round the answer to two decimal places.r = 18 inches, ? = 30°, A = ?
A. 169.56 in2
B. 9.42 in2
C. 4.71 in2
D. 84.78 in2
Answer: D
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Add.(-3 + 7x7 + 3x9 + 3x8) + (-8x8 + 7x7 + 9 + 6x9)
A. 9x9 - 5x8 + 14x7 + 6 B. 9x18 - 5x16 + 14x14 + 6 C. -11x9 - 11x8 + 12x7 + 9 D. 18x48 + 6
Factor completely. If unfactorable, indicate that the polynomial is prime.3x2 - 3
A. 3(x + 1)(x - 1) B. 3(x - 1)2 C. 3(x + 1)2 D. prime
Estimate. Then find the actual difference.631.23 - 71.8
A. Estimate: 570; Actual: 569.43 B. Estimate:560; Actual: 560.43 C. Estimate: 570; Actual: 559.43 D. Estimate: 560; Actual: 559.43
Solve the problem.The angle of elevation from the top of a house to a plane flying 9000 meters above the house is x radians. If d represents the horizontal distance, in meters, of the plane from the house, express d in terms of a trigonometric function of x.
A. d = 9000 cot x
B. d = 9000 tan x
C. d = 9000 sec x
D. d = 