Answer:
I think you meant to put an attachment but I don't see one
Step-by-step explanation:
It is 2,56 i think but i dont completely know thoe
I don't know if you meant profit or markup but,
take the difference of $80 & $50 = $30
What percent of 50 is 30? It's 3/5 or 60%. So there is a 60% markup on the original price of 50$.
The first thing you should do when dealing with implicit derivatives is to respect the rules of derivation of both the logarithm and the exponential
Then, you must regroup the terms correctly until you get dy / dx
The answer for this case is D
I attach the solution
It is 0 because anything multiplied by 0 is 0.