Ok my problem is rounding 34 to the nearest ten which is 30 in front of the 34 and 40 in the back and the 30 is circled because its closest to the rounded number and for the rest of my home work 23,64,21,66,76,41,38 have to round all of them and circle the rounded number that is closest to the given number

Here are the 30 best lifetime baseball batting averages of all time, arranged in order from lowest to highest: 0.319, 0.329, 0.330, 0.331, 0.331, 0.333, 0.333, 0.333, 0.334, 0.334, 0.334, 0.336, 0.337, 0.338, 0.338, 0.338, 0.340, 0.340, 0.341, 0.341, 0.342, 0.342, 0.342, 0.344, 0.344, 0.345, 0.346, 0.349, 0.358, 0.366 if you were to build a histogram of these data, which of the following would be the best choice of classes?