Use the shell method to find the volume of the solid generated by revolving the region bounded by the given curves and lines about the y-axis.y = 8 - x2, y = x2, x = 0
A. 8?
B. 32?
C. 4?
D. 16?
Answer: D
Mathematics
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Solve.
x > 45
A. x > 50
B. x < 
C. x > 
D. x < 50
Mathematics
Solve.A building has a length 7 feet longer than its width, and its area is 980 square feet. Let x be the width of the building. Find a quadratic equation whose solution gives the width of the building, then solve this equation.
A. 56 ft B. 21 ft C. 35 ft D. 28 ft
Mathematics
Find the axis of symmetry of the given function.y = 2x2 + 8x + 7
A. x = -1 B. x = 1 C. x = 2 D. x = -2
Mathematics
The histogram shows the scores of each participant in a game from a total of 100 participants. 
How many participants scored 60-79?
A. 38 participants B. 3 participants C. 16 participants D. 6 participants
Mathematics