Astatement sn about the positive integers is given. write statements sk and sk+1, simplifying sk+1 completely. show your work. sn: 1 ∙ 2 + 2 ∙ 3 + 3 ∙ 4 + . . + n(n + 1) = [n(n + 1)(n + 2)]/3

An animal shelter has 21 puppies. if the puppies are 28% of the total dog and cat population , how many dogs and cats are in the animal shelter

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.

Askate shop rents roller skates as shown on the table below. which graph and function models this situation?