Which situation is an example of an observational study?

a.) having a randomly selected group of students take a pen and paper test and comparing the results with another randomly selected group of students who took the same test on the computer?

b.) polling voters about their favorite candidates in upcoming elections.

c.) recording the reaction time of participants in a study who were asked to press a button as soon as they see a certain picture on a screen.

d.) asking kids in a kindergarten classroom about the average number of pieces of fruit they eat each day.

- C.) Recording the reaction time of participants in a study who were asked to press a button as soon as they see a certain picture on a screen.

8

step-by-step explanation:

to find the amount of gift bags to use all the supplies, find the gcf or greatest common factor. this is the largest number which multiplies evenly into each term.

48 has factors: 1, 2, 3, 4, 6, 8, 12. 16, 24, 48

80 has factors: 1, 2, 4, 5, 8, 10, 16, 20, 40, 80

64 has factors: 1, 2, 4, 8, 8, 16, 32, 64

the highest number factor they all share in common is 8. this means there will be 8 bags with 6 pencils, 10 markers, and 8 stickers in each bag.

answer: he is 272195

step-by-step explanation: all you have to do is multiple 3535 and 77 and it equals 272195