How much more is the rate of change of function 2 that the rate of change of function 1?

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Find dy/dx using implicit differentiation ln(20+e^xy)=y

At the electronics store you have a coupon for 20% off up to 2 cds you buy for cds with the original cost of $10.99 each the sales tax is 5% what is the total cost of your purchase

At 6 1/2 cents per pound of string beans how much does 7 pounds cost