Write a general term an for the sequence. Assume that n begins with 1.8, -16, 24, -32, 40, . . .
A. an = n8
B. an = (-1)n8n
C. an = (-1)n+18n
D. an = n + 8
Answer: C
Mathematics
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Perform the indicated operations, expressing the answer in simplest form with rationalized denominators.(3 - 
)(5 + 
)
A. 3x + 2
B. 3x - 2
C. 3x
D. -3x - 2
Mathematics
Find the volume of the described solid.The solid lies between planes perpendicular to the x-axis at x = - 3 and x = 3. The cross sections perpendicular to the x-axis are circular disks whose diameters run from the parabola y = x2 to the parabola y = 18 - x2.
A. 
?
B. 
?
C. 36?
D. 
?
Mathematics
Given that the pair of triangles is similar, find the length of the side labeled n. Round your results to 1 decimal place, if necessary.
A. 0.1 B. 10.1 C. 13.8 D. 4.1
Mathematics
Identify the numerator and the denominator of the fraction.
A.
| numerator: |  |
| denominator: | 2 |
B.
| numerator: | 5 |
| denominator: | 2 |
C.
| numerator: | 7 |
| denominator: | 1 |
D.
| numerator: | 2 |
| denominator: | 5 |
Mathematics