Solve.Libby's 4 quiz scores in her math class are 88, 87, 88, and 79. What score does she need to obtain on her next quiz to average an 85? Round to the nearest whole number if necessary.
A. 77
B. 83
C. 68
D. 85
Answer: B
Mathematics
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A. y, x B. y, y C. x, y D. x, x
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Rationalize the denominator.
A. 52
B. 3
C. 
D. 
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Evaluate the line integral along the curve C.
ds , C is the straight-line segment x = 0, y = 5 - t, z = t from (0, 5, 0) to 
A. 25
B. 0
C. 25
D. 
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A cross-section of a parabolic reflector is shown in the figure. The bulb is located at the focus and the opening at the focus is 18 cm. Find an equation of the parabola. Let V be the origin. Find the diameter of the opening |CD|, 19 cm from the vertex.
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Mathematics