The total cost for Soni corp. to manufacture q DVD players is given by the function C(x)= 6q^3 - q^2 + 7q + 90, where q represents the quantity of DVDs manufactured. Find the marginal cost for Soni Corp. when it manufactures 5 DVDs.
total cost c(x)=6q^3-q^2+7q+90
marginalcost dc/dq =18q^2-2q+7
marginal cost for soni corp when it manufactures 5 DVD's=18*5^2-2*5+7
=18*25 -3
=450-3
=447
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