for the implicit integration I got:

the vertical tangent would at points at which y' goes to infinity.
that happen when the right-hand side has singularities, that is, the denominator is 0:

so the two points y above have a vertical tangent.
Answer:
Step-by-step explanation:

I am not 100% positive but from what I remember learning I think the answer you are looking for on the first question is C.
Step-by-step explanation:
Henry is deeper in the water than Ray because -20 < -15
Hope it helps <3
Zeros do not count as a sigfig so when you do something like this problem just include the numbers until you hit your significant figure limit and then substitute zeros where you can. 20000