Ileana received a statement on her Certificate of Deposit showing that her investment had returned $5,084 over its life. If the Certificate of Deposit pays a simple interest rate of 4.1% and her initial investment was $15,500, how long had the money been invested?

Plz hurry evaluate the expression a+b where a=8 and b=19

Math i have no idea how to do a and b

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?