1. factor the trinomial: x2 - 10x + 9
a. (x + 1)(x - 10)
b. (x - 1)(x - 9)
c. prime
d. (x - 3)(x - 3)
2. factor the trinomial: x2 - 14x + 24
a. prime
b. (x - 3)(x - 8)
c. (x - 4)(x + 12)
d. (x - 2)(x - 12)

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?