A solution is to

We have been given that, a solution is kept between 86° F and 95° F.

Let F₁ = 86° F

And let F₂ = 95°

The conversion formula is

We need to convert Fahrenheit into degree Celcius.

So, take F₁ = 86° F

Using the formula, we have

⇒ C₁ = 5 × 6

⇒ C₁ = 30° C

Now, take F₂ = 95° F

Using the formula, we have

⇒ C₂ = 5 × 7

⇒ C₂ = 35° C

Therefore, the range of temperature of the solution in degree Celsius is 30° C and 35° C.