What is the value of the missing angle? a, 720b, 120c, 128d, 138

The sum of all the interior angles in a hexagon is 720°, so if you add up all the angles and then take them away from 720, you'll get your
152 + 85 = 237
237 + 85 = 322
322 + 125 = 447
447 + 135 = 582
So 720 - 582 = 138°, which is your answer. I hope this helps!

This histogram is unimodal skewed. There are two parts to this answer. The first part has to do with the number of modes. This would be the item that is occurring the most frequently. In this case the mode is only 4. It is occurring more than any other.
The second part of this has to do with the distribution of the data as it is displayed on the histogram. There are 4 pieces of data that are only occurimg one time on the right of the histogram. We call this skewing the data. When both sides looks almost the same we say it is symmetric.