Which polynomial function is best represented by the graph?
f(x) = x2(x - 1)3
F(x) = x2(x + 1)3
F(x) = -x(x - 1)
f(x) = x(x - 1)

Evaluate the expression for the given value of the variable 7a - 4a for a =8

How long must $542 be invested at a rate of 7% to earn $303.52 in interest? in a easier way

3.17 scores on stats final. below are final exam scores of 20 introductory statistics students. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 57, 66, 69, 71, 72, 73, 74, 77, 78, 78, 79, 79, 81, 81, 82, 83, 83, 88, 89, 94 (a) the mean score is 77.7 points. with a standard deviation of 8.44 points. use this information to determine if the scores approximately follow the 68-95-99.7% rule. (b) do these data appear to follow a normal distribution? explain your reasoning using the graphs provided below.