3. A passenger train travels between two
cities at a constant speed. After 6 hours,
it has traveled 450 miles. After 9 hours, it
has traveled 675 miles. Which equation
shows the relationship between the
distance d in miles and the time t in hours?
A. d= 225t
B. d= 75t
C. d=t+ 225
D. d=

Your food costs are $5,500. your total food sales are $11,000. what percent of your food sales do the food costs represent?

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.

Which exponential function has an initial value of 2? f(x) = 2(3x) f(x) = 3(2x)