Simplify. Write the expression as a single logarithm with a coefficient of 1.log6(x + 4) - log6(x + 7)
A. log6
B. log6(x2 + 11x + 28)
C. log6(-3)
D. log6
Answer: D
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Calculate the derivative of the function. Then find the value of the derivative as specified.
t =1 if r = 
A. 
= - 
; 
t =1
= - 
B. 
= 
; 
t =1
= 
C. 
= 
; 
t =1
= 
D. 
= - 
; 
t =1
= - 
Decide whether or not the given equation is an identity.cos(90° - x) = sin x
A. Yes B. No
Solve the problem.The graph of y (solid line) and four other functions (dashed patterns) are shown. Which of the four functions is the graph of the derivative of y? 
A. I B. II C. III D. IV
Find the vertex, focus, and directrix of the parabola with the given equation.(y - 4)2 = -16(x - 1)
A. vertex: (4, 1) focus: (0, 1) directrix: x = 8 B. vertex: (-1, -4) focus: (-5, -4) directrix: x = 3 C. vertex: (1, 4) focus: (-3, 4) directrix: x = 5 D. vertex: (1, 4) focus: (5, 4) directrix: x = -3