Eliminate the parameter t. Find a rectangular equation for the plane curve defined by the parametric equations.x = et, y = e-t; -? < t < ?
A. y = e-ln x; 0 < x < ?
B. y = ex; -? < x < ?
C. y = eln x; 0 < x < ?
D. y = e-x; -? < x < ?
Answer: A
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Graph the function by first writing it in the form y = A sin(x + C). State the amplitude, period, and phase shift.y = 4
sin x - 4 cos x
A. Amplitude 4, period 2?,
phase shift - 
B. Amplitude 8, period 2?,
phase shift 
C. Amplitude 8, period 2?,
phase shift 
D. Amplitude 8, period 2?,
phase shift - 
Graph the equation and its tangent.Graph y = 5x2 and the tangent to the curve at the point whose x-coordinate is -2.
A. 
B. 
C. 
D. 
Use the laws of exponents to simplify each expression using positive exponents only. Assume all variables represent nonzero real numbers.(15b)0
A. b B. 15 C. 0 D. 1
Solve the equation. Express irrational answers in exact form and as a decimal rounded to 3 decimal places.ln x + ln (x + 6) = 2
A. -6 + 
? 2.097
B. 
? -7.048
C. 
? 1.048
D. 
? 3.587