Mark worked 60 hours last week. He spent 35% of his time working on the Rivers project, 45% working on the Brown project, and 20% working on the Richards project. How many hours did he work on the Brown project?

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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

True or false? a circle could be circumscribed about the quadrilateral below.