Could anyone help me by solving this step by step so I can see what you did there?

Thank you so much in advance. (Wink)

http://10proxy.info/rr.png

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- Jul 22nd 2009, 07:41 AMwdmaNeed urgent help with Related Rates
Could anyone help me by solving this step by step so I can see what you did there?

Thank you so much in advance. (Wink)

http://10proxy.info/rr.png - Jul 22nd 2009, 09:03 AMCalculus26
R = 110q - q^2/200

dq/dt = 55 the rate production is increasing and q = 400

Now we differentiate with respect to time -- note d(q^2)/dt = 2q dq/dt

dR/dt = 110dq/dt -q/100 dq/dt

dR/dt = 110(55)-(400/100)(55)

dR/dt = 6050 - 220 = 5830dollars/day - Jul 22nd 2009, 09:19 AMwdma
- Jul 22nd 2009, 09:35 AMCalculus26
I am going to stand by answer--what does your friend suggest the answer

should be? What do you mean exactly by plugging in the derivative? - Jul 22nd 2009, 10:45 AMwdma