You are curious if doing a study group helps improve performance in your statistics course. You randomly pick half of the class to do study group and the rest of the class will not do any study group. After the semester goes by, you compare the performance of students who did the study group vs those who did not. Is this anecdotal data, available data, an observational study, or an experiment? A. anecdotal data
B. available data
C. observational study
D. experiment

a) 0.25x times 3. (could be wrong on equation.)

b) 2.25 pound of dark chocolate. (can i eat all the chocolate? plz? anyway, again, could be wrong, but i hope im right. all the chocolate together should be 5.25 pounds)

have a good day!

step-by-step explanation:

the original amount doesn't ''re just looking for the time it takes for 1/2 of the substance to we have

(1/2) =)     take the ln   of both sides

ln (1/2)   = )   and we can write

ln(1/2) = ) lne     and lne   = 1     so we have

ln(1/2) = -.1092t     divide both sides by -.1092

t = ln(1/2)/-.1092 = about 6.347 days = about 6.3 days (rounded)