Find the standard deviation s for the given data. Round your answer to one more decimal place than the original data.The test scores of 40 students are summarized in the frequency distribution below. Find the standard deviation. 
A. 15
B. 14.3
C. 13.5
D. 15.8
Answer: A
Mathematics
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A. x = 22 B. (x - 11)2 + y2 = 0 C. x2 + (y - 11)2 = 121 D. (x - 11)2 + y2 = 121
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Perform the indicated operations.Estimate by rounding to the nearest thousand, then find the actual sum.
A. Estimate: 49,000 Actual: 47,615 B. Estimate: 47,000 Actual: 48,364 C. Estimate: 47,000 Actual: 47,639 D. Estimate: 48,000 Actual: 47,645
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Find the product.(4x - 4y2)2
A. 16x2 - 32xy2 + 16y4 B. 8x2 + 8y4 C. 16x2 + 32xy2 + 16y4 D. 16x2 + 16y4
Mathematics
Name the quadrant in which the point is located, or the axis on which it lies .(0, -19)
A. y-axis B. Quadrant II C. Quadrant III D. x-axis
Mathematics