Simplify the expression.
+ 
+ x + 11
A. 14
+ 
B. x + 13
C. x + 12
+ 
D. x + 10
+ 
Answer: C
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Using Green's Theorem, calculate the area of the indicated region.The circle r(t) = (9 cos t)i + (9 sin t)j, 0 ? t ? 2 ?
A. 81? B. 9? C. 2? D. 18?
Use a trigonometric substitution to evaluate the integral.
A. 
sin-1 
+ C
B. tan-1 
+ C
C. 
tan-1 
+ C
D. 
ln 
+ C
A cleaning process is removing salt from a pool. The amount S, in pounds, of salt remaining after t hours is given in the following table. Use exponential regression to find the percentage decrease in salt over any 4-year period. Round your answer to two decimal places. Round your answer to two decimal places. t 1.16 4.83 8.44 11.55 15.43 S 23.29 12.16 5.54 3.04 2.16?
A. 64.00% B. 50.21% C. 65.93% D. 49.06%
Find the volume. Use ? ? 3.14. Round to the nearest tenth when necessary.a cylinder with diameter 10 in. and height 11 in.
A. 345.4 in.3 B. 172.7 in.3 C. 863.5 in.3 D. 3454 in.3