The test scores for 10 students were: 74, 81, 39, 74, 85, 80, 100, 92, 74, and 85. What is the mode?

74

Step-by-step explanation:

"The mode is the value that appears most often in a set of data values."

So, if we look at this data, we can conclude that the mode is 74 because 74 appears 3 times (with 85 being second at twice).

74, 81, 39, 74, 85, 80, 100, 92, 74, and 85

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39, 74, 74, 74,  80, 81, 85, 85, 92, 100

           /\

        3 74's

d. 145*2 is 290 than the total angle is 360 then minus 290 then divide by two