Graph the function. State the amplitude, period, and phase shift.y = 
sin x + 
cos x 
x-scale = 
y-scale = 1
A. Amplitude 3, period 2?,
phase shift 
x-scale =  | y-scale = 1 |
B. Amplitude 1.5, period 2?,
phase shift -
x-scale =  | y-scale = 1 |
C. Amplitude
, period ?, phase shift -
x-scale =  | y-scale = 1 |
D. Amplitude 3, period ?,
phase shift
x-scale =  | y-scale = 1 |
Answer: B
Mathematics
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t = -9
A. 2 B. -12 C. -36 D. -13
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A. 11 B. -11 C. 3 D. -3
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State the domain of the given function.f(x) = 
A. All real numbers x > 9 B. All real numbers x > -9 C. All real numbers x ? -9 D. All real numbers except -9
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Solve the problem.Suppose a cost-benefit model is given by f(x) = 
, where y is the cost in thousands of dollars for removing x percent of a given pollutant. Find the cost of removing 30% to the nearest dollar.
A. $1170 B. $1671 C. $428 D. $3900
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