SOMEBODY HELP! NEED TO PASS CLASS widget wonders produces widgets. they have found that the cost c(x) of making x widgets is a quadratic function in terms of x. the company also discovered that it cost 20.50 to produce 3 widgets 60.50 to produce 7 widgets and 133 to produce 12 widgets how much does it cost to produce 9 widgets

Question

anonymous · Answer

i dont know how to do this

anonymous · Answer

this is a pain, you have to find the quadratic through $(3,20.5) ,(7,60.5),(12,133)$

anonymous · Answer

Whar do you mean?

anonymous · Answer

best fit is 
$$\frac{1}{2}x^2+5x+1$$

anonymous · Answer

there is a nice painful slow process for finding this, too late for me to do it here, just cheat http://www.wolframalpha.com/input/?i=quadratic+%283%2C20.5%29+%2C%287%2C60.5%29%2C%2812%2C133%29