Solve the equation. First simplify the expression by combining like terms.
(r + 6) = 
(r + 8)
A. -2
B. -1
C. 2
D. 1
Answer: B
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Find the volume of the solid generated by revolving the region R bounded by the graphs of the given equations about the y-axis.x = y1/3, x = 0, y = 8
A. 32?
B. 
?
C. 12?
D. 16?
Find the equation of a circle satisfying the given conditions.Center: (-8, 1); radius: 11
A. (x + 1)2 + (y - 8)2 = 11 B. (x - 8)2 + (y + 1)2 = 121 C. (x - 1)2 + (y + 8)2 = 11 D. (x + 8)2 + (y - 1)2 = 121
Solve. Write the fraction in simplest form.Erika spent 
hr on her computer visiting the history channel and the discovery channel websites. She spent 
hr at the history channel website. How many hours did she spend at the discovery channel website?
A. 
hr
B. 
hr
C. 
hr
D. 
hr
Answer the question about percent. Round your answer to the nearest tenth of a percent, if necessary.225 is what percent of 1820?
A. 0.1% B. 0.0% C. 808.9% D. 12.4%