A bee flies at 20 feet per second directly to a flowerbed from its hive. The bee stays at the flowerbed for 16 ​minutes, and then flies directly back to the hive at 16 feet per second. It is away from the hive for a total of 18 minutes.

What is the inverse of the function f(x)=4x+8

How to do this , and can some one explain

The median of a data set is the measure of center that is found by adding the data values and dividing the total by the number of data values that is the value that occurs with the greatest frequency that is the value midway between the maximum and minimum values in the original data set that is the middle value when the original data values are arranged in order of increasing (or decreasing) magnitude