Express the number in decimal notation.8.1 × 105
A. 81,000
B. 8,100,000
C. 405
D. 810,000
Answer: D
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Find the length of the curve.The curve r = 3
, 0 ? ? ? 
A. 
(? + 2)
B. 3(? + ln(? + 
))
C. 
?
D. 2?
Multiply and simplify.(sin ? - 1)(sin ? + 1)
A. cos2? B. - cos2? C. - cos2? - 2 sin ? D. cos2? - 2 sin ?
Find the domain and range and describe the level curves for the function f(x,y).f(x, y) = -3x + 9y
A. Domain: all points in the xy-plane; range: all real numbers; level curves: lines 
c > 0
B. Domain: all points in the xy-plane; range: real numbers z ? 0; level curves: lines 
c ? 0
C. Domain: all points in the xy-plane; range: real numbers z ? 0 ; level curves: lines 
c ? 0
D. Domain: all points in the xy-plane; range: all real numbers; level curves: lines 
Simplify and add or subtract wherever possible.
- 2
+ 6
A. 37
B. 4
C. 4
D. 37