At certain times of the day, shadows form similar triangles. Use this information, and the information below, to determine the unknown height, x, of the tree. 12.5 12.5 3.2 3.2 17.5 17.5 10 10 20.1 20.1

Which is the graph of f(x) = (4)x? image for option 1 image for option 2 image for option 3 image for option 4

Mat bought a phone for $100. he has to pay $30 per mouth. if he has paid $640 in total, how many mouth has he had the phone?

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.