buisness calc help please

[sleek snow]

(need more help pls hit dms if u can)

[neat bloom]

1. Ask your question and show the work you've done so far. If you've posted a screenshot of a question, specify which part you need help with.
2. Wait patiently for a helper to come along.
3. Once someone helps you, say thank you and close the thread with:

   +close
   

4. Feel free to nominate the person for helper of the week in #helper-nominations
5. Do not ping the mods, unless someone is breaking the rules.
6. If you're happy with the help you got here, and the server overall, you can contribute financially as well:

[real vessel]

I would first isolate y, so raise both sides to the power of 4 (4 is the inverse of 1/4)

then divide the non y parts from both sides

now you just do the power rule on this

[lilac condor]

Dont you just make it equal to 0 and find the derivative, substitute X and y for the values in the question