Solve. Use the principle of square roots.x2 = 9
A. ±4
B. 4.5
C. 3
D. ±3
Answer: D
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250 students in a math class take the final exam. The scores on the exam have an approximately normal distribution with mean ? = 75 and standard deviation ? = 10.Approximately what percentage of the test scores had standardized values between -3 and 3?
A. 95% B. 68% C. 99.7% D. 50% E. none of these
Graph the linear equation.y = 4x - 6
A. 
B. 
C. 
D. 
Convert the rectangular equation to a polar equation that expresses r in terms of ?.8x - 9y + 1 = 0
A. 8 cos ? - 9 sin ? = -1
B. 8 cos ? - 9 sin ? = 1
C. r = 
D. r = 
Using the Divergence Theorem, find the outward flux of F across the boundary of the region D.F = 3xy2i + 3x2yj + 2xyk ; D: the region cut from the solid cylinder x2 + y2 ? 9 by the planes z = 0 and 
A. 486?
B. 
?
C. 243?
D. 972?