What is the area of this triangle ? (updated)

If g(x) is an odd function, which function must be an even function?

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

You are at a restaurant and owe $38 for your meal. you want to leave a 20% tip. how much will your tip be?