Mr. and Mrs. Ryan are working together to wash all the windows in their house. The following equation can be used to find h, the number of hours it will take them to finish the job. h 6 + h 3 =1 How long will it take Mr. and Mrs. Ryan to wash all the windows? Write your answer as a whole number or as a fraction or mixed number in lowest terms. hours

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?