Answer:
c
Step-by-step explanation:
=1/81
=3
=
=1/81
First of all, this is not an observational study, but an experiment, since we have two groups and one of the two groups is manipulated or treated. In an observational study the subjects are only observed.
Second, the students did not choose their groups - so we can't choose the last answer.
Therefore the correct answer is:
This is an experiment because a treatment was applied to a group.
Umm, surface area of a cube = 6e^2 (six edge square) which is 6(3)sqaure = 54
Answer:
C
Step-by-step explanation:
The volume of the regular pyramid is 
The base of given pyramid is regular hexagon with side 12 cm. The are of this hexagon consistsof area of 6 equilateral triangles and is equal to
Hence, the volume of the pyramid is
Since Maria bought 16 books, and b represents the number Dale had; you can divide 16 by 8 to get the number b of books Dale has. 16/8=2
Hope this helped!
