Using the uniform distribution, it is found that the mathematical expression for the probability density function of battery recharging time for this scenario is given by:
[tex]f(x) = \frac{1}{40}, 70 \leq x \leq 110[/tex]
[tex]f(x) = 0[/tex], elsewhere.
It is a distribution with two bounds, a and b, in which each outcome is equally as likely.
The probability density function is:
[tex]f(x) = \frac{1}{b - a}, a \leq x \leq b[/tex]
[tex]f(x) = 0[/tex], elsewhere.
In this problem, the actual recharging time required is uniformly distributed between 70 and 110 minutes, hence a = 70, b = 110, and the density function is:
[tex]f(x) = \frac{1}{40}, 70 \leq x \leq 110[/tex]
[tex]f(x) = 0[/tex], elsewhere.
More can be learned about the uniform distribution at https://brainly.com/question/13889040