A building in the shape of a rectangular box is to have a volume of 
(see the figure). It is estimated that the annual heating and cooling costs will be $2/square foot for the top, $4/square foot for the front and back, and $2/square foot for the sides. Find the dimensions of the building that will result in a minimal annual heating and cooling cost. What is the minimal annual heating and cooling cost(C)?
?
?
A. 
B. ?
C. ?
D. ?
Answer: A
Mathematics
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Find the sum of the measures of the angles of the polygon.A decagon
A. 2160° B. 1440° C. 1800° D. 1620°
Mathematics
Convert the degree measure to radians, correct to four decimal places. Use 3.1416 for ?.-160°41'
A. -2.7945 B. -2.7745 C. -2.8045 D. -2.7845
Mathematics
Factor completely. If the polynomial cannot be factored, say it is prime.3y3 + 12y2 - 15y2 - 60y
A. (y + 4)(y - 5) B. 3y(y - 4)(y + 5) C. (y + 4)(3y2 - 15y) D. 3y(y + 4)(y - 5)
Mathematics
Use Descartes' Rule of Signs to determine the possible number of positive real zeros and the possible number of negative real zeros for the function.f(x) = 7x8 + 4x6 + 4x4 + 6x2 + 2
A. 4 positive; 0 negative B. 0 positive; 0 negative C. 4 positive; 4 negative D. 0 positive; 4 negative
Mathematics