Which expression represents the product of 5 and the sum of b and 4. O b+5(4)
O 5+4b
O 5(b + 4)
O 5b + 4

Find the number of positive three-digit even integers whose digits are among 9, 8, 7,5, 3, and 1.

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.

Olga bought a new skirt that cost $20. sales tax is 5%. how much did olga pay, including sales tax? 7.