Need help setting this problem up.

Question

A company estimates that the daily revenue (in dollars) from the sale of x cookies is given by R(x)=1160+0.03x+0.0006x^2. Currently, the company sells 390 cookies per day. Use marginal revenue to estimate the increase in revenue if the company increases sales by one cookie per day.

Answer 1

y=$ take in =0.0006x^2 +0.03x+1160

Big Dontno...how many dollars tu comep get from 1 kuekee???????

"marginal rate"...dy/dx=0.0012x +0.03

If x was number kuekees, yu wood set  x=1 & evaluate dy/dx

But yu sed x=$ take in