A rectangular box is to have a square base and a volume of 20 ft3. The material for the base costs 
, the material for the sides costs 
, and the material for the top costs
src="https://sciemce.com/media/3/ppg__cognero__2.3_Functions_and_Mathematical_Models__media__02225418-7b88-4931-9890-0464c33ea6fd.PNG" class="wirisformula" align="middle" style="vertical-align: middle;" data-wiris-created="true" varid="variable_id_field" variablename="impvar_efb0ec360f664862976860fc8" />. Letting x denote the length of one side of the base, find a function in the variable x giving the cost of constructing the box.
?
?
A. 
B. 
C. 
D. 
E. 
Answer: D
Mathematics
src="https://sciemce.com/media/3/ppg__cognero__2.3_Functions_and_Mathematical_Models__media__02225418-7b88-4931-9890-0464c33ea6fd.PNG" class="wirisformula" align="middle" style="vertical-align: middle;" data-wiris-created="true" varid="variable_id_field" variablename="impvar_efb0ec360f664862976860fc8" />. Letting x denote the length of one side of the base, find a function in the variable x giving the cost of constructing the box.
?
?
A.
B.
C.
D.
E.
Answer: D
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B. f(x, y, z) = 
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C. f(x, y, z) = 
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D. f(x, y, z) = 
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Find the equation, in the form 
, of the circle passing through the given points.
?
, 
, and 
?
A. ?
B. ?
C. ?
D. 
E. none of these