The population of a city has decreased by 400 residents over the past 5 years. The same number of residents left each year. What was the change in the city's population each year? A.80

B.400

C.-80

D.-400

Simplify the expression and find the missing terms. the simplest form of has in the numerator and in the denominator.

This is different from the first one can someone me

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.