Multiply.(
- 9)(9 + 
)
A. 81 - m
B. m - 
+ 81
C. m - 81
D. m - 18
- 81
Answer: C
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Evaluate the spherical coordinate integral.
A. 
?
B. 
?
C.
 ? |
D.
?Solve the problem.Evaluate f(t) = cot t at t = 
verbally.
A. If ? = 
is in standard position, the terminal side intersects the unit circle at the point 
Therefore, 
B. If ? = 
is in standard position, the terminal side intersects the unit circle at the point 
Therefore, 
is undefined.
C. If ? = 
is in standard position, the terminal side intersects the unit circle at the point 
Therefore, 
D. If ? = 
is in standard position, the terminal side intersects the unit circle at the point 
Therefore, 
is undefined.
Solve the problem.The ferris wheel in the figure has a radius of 42 meters. The distance between the top of the ferris wheel and the ground is 91 meters. The rectangular coordinate system shown has its origin on the ground directly below the center of the wheel. Use the coordinate system to write the equation of the circular wheel.
A. x2 + (y - 49)2 = 842 B. x2 + y2 = 422 C. x2 + (y - 49)2 = 422 D. x2 + (y + 49)2 = 422
Write a formula for the general term (the nth term) of the arithmetic sequence. Then use the formula for an to find a20, the 20th term of the sequence.2, 6, 10, 14, 18, . . .
A. an = n + 4; a20 = 24 B. an = 2n - 4; a20 = 36 C. an = 4n - 2; a20 = 78 D. an = 4n + 2; a20 = 82