Factor the following expression for the maximum power in a certain electrical circuit.
?
?
A. 
B. 
C. 
D. 
E. 
Answer: D
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Show that the equation is not an identity by listing the value(s) of the variable from among 0, 
, 
, and - 
for which the equation is false.sin 2? = 2 sin ?
A. 
, 
, and - 
B. 
and - 
C. 
, 
, and 0
D. 
and 0
Graph the function on the indicated domain, and use the capabilities of your calculator to find the location and value of the indicated absolute extremum.
; [0, ?)Minimum
A. -20.21 at x = 1.7 B. -20.21 at x = 1.3 C. -20.09 at x = 1.9 D. -20.25 at x = 1.5
Find all numbers for which the rational expression is not defined.
A. c = -7 B. c = 0 C. c = 7 D. None
Solve the problem.Under certain conditions the wind speed S, in miles per hour, of a tornado at a distance d from its center can be approximated by the function 
where a is an atmospheric constant, and V is the approximate volume of the tornado, in cubic feet. Assume that a is 0.78, and find Sd.
A. 
B. 
C. 
D. - 