Solve the equation.
= 
A. 
B. 43
C. 
D. 11
Answer: B
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Solve the problem. Round your answer, if appropriate.As the zoom lens in a camera moves in and out, the size of the rectangular image changes. Assume that the current image is 
Find the rate at which the area of the image is changing (dA/df) if the length of the image is changing at 0.7 cm/s and the width of the image is changing at 0.4 cm/s.
A. 14.0 cm2/sec B. 14.6 cm2/sec C. 7.3 cm2/sec D. 7.0 cm2/sec
Find the slope of the polar curve at the indicated point.r = -7 + 2 sin ?, ? = 0
A. - 
B. 
C. 
D. - 
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. 
Perform the following operation.
?
What will be an ideal response?