Which of the following is equal to the expression below? (6^-8)^4

(A) -6^4
(B) -6^32
(C) 1/6^32
(D) 1/6^4

Which shows the correct solution of the equation 1/2a+2/3b=50, when b=30?

The sum of five and a number n is at least 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?