If x is the amount of time Gillian takes,
1/10 - 1/x = 1/25
Therefore, the answer is A
Answer:

Step-by-step explanation:

You need to complete the square on the right side.







The ODE is linear:


Multiplying both sides by
gives

Notice that the left side can be condensed as the derivative of a product:

Integrating both sides with respect to
yields


Since
,

so that

Isolating the x^2 is the simplest way. it would only be three steps.
Answer:
36+9=45+5%=47.25
Step-by-step explanation: