Write the sentence as a proportion.4.3 bushels is to 6.4 acres as 8.6 bushels is to 12.8 acres
A. 
= 
B. 
= 
C. 
= 
D. 
= 
Answer: B
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Factor the trigonometric expression.sin2x + 4 sin x - 45
A. (sin2 x + 9)(sin x - 5) B. (sin x - 45)(sin x + 1) C. (sin x - 9)(sin x + 5) D. (sin x + 9)(sin x - 5)
Solve the problem.Find a field G = P(x, y)i + Q(x, y)j in the xy-plane with the property that at any point (a, b) ? (0, 0), G is a vector of magnitude 
tangent to the circle x2 + y2 = a2 + b2 and pointing in the clockwise direction.
A. -yi + xj B. xi - yj C. xi + yj D. yi - xj
Find an equation of variation for the given situation.y varies inversely as x, and y = 12when x = 3
A. y = 36x
B. y = 
C. y = 
D. y = 
Solve the problem.If a cube has sides of length s yards, then the volume of the cube is s3 cubic yards. Find the volume of a cubic box with sides of length 21 yards.
A. 882 cubic yards B. 63 cubic yards C. 9261 cubic yards D. 441 cubic yards