Convert the units using unit fractions.405 min = 
hr
A. 24,300
B. 6
C. 4050
D. 6
Answer: D
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For the given equation, find the vertex or vertices.r = 
A. 
B. 
C. 
, 
D. 
, 
Determine the quadratic function whose graph is given.
A. f(x) = x2 - 6x - 8 B. f(x) = -x2 - 6x + 8 C. f(x) = x2 - 6x + 8 D. f(x) = x2 + 6x + 8
Compute the average rate of change of f from x1 to x2. Round your answer to two decimal places whenappropriate. Interpret your result graphically.f(x) = x3 - 4x, x1= 2 and x2= 4
A. -24; the slope of the line passing through (2, f(2)) and (4, f(4)) is -24. B. -8; the slope of the line passing through (2, f(2)) and (4, f(4)) is -8. C. 24; the slope of the line passing through (2, f(2)) and (4, f(4)) is 24. D. 8; the slope of the line passing through (2, f(2)) and (4, f(4)) is 8.
Solve.The time T necessary to make an enlargement of a photo negative varies directly as the area A of the enlargement. If 72 seconds are required to make a 3-by-4 enlargement, find the time required for a 4-by-8 enlargement.
A. 160 sec B. 256 sec C. 224 sec D. 192 sec