I think B (Every fifth student from each grade)
A only talks about female students, C talks about students on a sports team which would be biased since the students on the sports team probably get more exercise, and d would be ok but not the best since some last names are more common and others you would get only a very small sample size.
Answer:
bRbRbRbRbRbRbRbRbRbRbRbRbRbRbRbRbR
Step-by-step explanation:
This is simply a piece-wise addition. You are going from 22.27 to -6.20 in latitude, and from 114.15 to 106.80 in longitude. Do the mathematics, and you get -28.47 degrees of latitude, and -7.35 degrees of longitude.
-28.47 degrees of latitude, and -7.35 degrees of longitude
First you need to divide 220/10 to see how many bagles they make an hour.
220/10=22
Then you Multiply 22*13 and you get 286.
So they make 286 bagels in 13 hours.
