Find the volume of the solid generated by revolving the region bounded by the given lines and curves about the x-axis. Use the method of disks.y = 
, y = 0, x = 0, x = 7
A. 14?
B. 196?
C. 
?
D. 
?
Answer: C
Mathematics
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Name the conic or limiting form represented by the given equation.5x2 - 20x + 520 = 0
A. Line B. Parallel lines C. Empty set D. Parabola
Mathematics
Use the quadratic formula to write the solution of the quadratic equation
.
?
A. 
B. ?
C. ?
D. ?
Mathematics
Use the sum/difference identities to simplify the expression. Do not use a calculator.cos 5° cos 40° - sin 5° sin 40°
A. 
B. 
C. - 
D. 1
Mathematics
Write a matrix equation equivalent to the system of equations.-2x + 8y + 3z = 0 2x + 2y - 2z = -12 2x + 6y + 6z = 44
A. 
=
B. 
=
C.
| ? |
= 
D.
= 
Mathematics