State which trigonometric functions are undefined for the given value. Refer to the unit circle below.
A. Secant and cotangent
B. Cosecant and cotangent
C. Secant and tangent
D. Cosecant and tangent
Answer: C
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Find Dxy.y = -sinh-1 (3x2 + 4)
A. 
B. 
C. 
D. 
The population N, in thousands, of a small town after t years is given in the table below. Use exponential regression to find the percentage decrease over any 6-year period.Round your answer to two decimal places. t 2 4 6 8 10 N 8.43 5.82 3.69 2.51 1.69?
A. 69.60% B. 69.32% C. 108.00% D. 109.95%
Find the x- and y-intercepts. If no x-intercepts exist, state so. Round to two decimal places if necessary.y = 2x2 - 7
A. No x-intercept; y-intercept (0, -7) B. x-intercepts (1.87, 0) and (-1.87, 0); y-intercept (0, -7) C. x-intercepts (1.87, 0) and (-1.87, 0); y-intercept (0, 7) D. x-intercept (1.87, 0); y-intercept (0, -7)
Evaluate the series.
A. 
B. 
C. 
D. 