Help pls will give brainlist and points

What is the measure of ac? 5 units 13 units 26 units 39 units

()1. how do you find range? 2.the following set of data is to be organized into a histogram. if there are to be five intervals on the graph, what should the length of each interval be? 30, 34, 23, 21, 27, 25, 29, 29, 25, 23, 32, 31

Xto the second power plus 14x plus 48. what are the factors? we are doing factoring trinomials with a=1