C(q)=2q+155 q +2,000

The ''q'' is supposed to have a square root on it.

A company manufactures bookcases. The function above gives the cost C(q)C(q)C, left parenthesis, q, right parenthesis, in dollars, of producing q bookcases. How many dollars is the fixed cost of production before any bookcases are produced?

215.92 dollars is the answer

hello from mrbilldoesmath!

answer:

(7 x + 6 y) (49 x^2 - 42 x y + 36 y^2)

discussion:

the trick is to recognize that 343 = 7^3 and 216 = 6^3 and, in general,

a^3 + b^3 =   (a + b) (a^2 - a b + b^2).

in our case

343x^3+216y^3   =   (7x)^3 + (6y)^3

so take a = 7x and b = 6y in the above equation to get the answer.

you,

mrb

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