The level of ozone, an invisible gas that irritates and impairs breathing, present in the atmosphere on a certain May day in the city was approximated by
?
where 
is measured in pollutant standard index (PSI) and t is measured in hours, with 
corresponding to 
a.m.
?
Use the second derivative test to find the approximate value of t where the function A has a relative maximum. Round to the nearest integer.
?
A. 
B. 
C. 
D. 
E. 
Answer: E
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Provide an appropriate response.The curve y = ax2 + bx + c passes through the point (2, 24) and is tangent to the line 
at the origin. Find a, b, and c.
A. a = 5, b = 2, c = 0 B. a = 0, b = 5, c = 2 C. a = 2, b = 0, c = 5 D. a = 6, b = 0, c = 0
Identify the figure and name it using the labels shown.
A. line CG, or 
B. ?CG
C. 
, or 
D. line segment CG, or 
Indicate whether the function is one-to-one.{(10, -13), (1, -8), (-12, -12)}
A. Yes B. No
Identify where f is increasing or where f is decreasing, as indicated. Round your answer to two decimal places when appropriate.f(x) = x3 - 4x - 7; decreasing
A. (-?, -1.15] ? [1.15, ?) B. [-1.15, 1.15] C. [-2.00, 2.00] D. (-?, -1.15]