4^4 * 4^3
------------
4^5
= 4^7 / 4^5
= 4^(7-5)
= 4^2 = 16 Answer
At every 1.0 unit, boiling point decreases 1.8 unit, which means the slope m = -1.8.
Answer: 15
a=5, b=3
3a= 3x5= 15
https://www.khanacademy.org/math/statistics-probability/modeling-distributions-of-data/z-scores/a/z-scores-review
Clear Your concept
It is not possible to select a single group from the primary school, since being a single group it could not in any way represent the entire primary school.
Choosing a group would provide the average height for that group, not the entire primary.
Assumptions can be made that the course of half of the primary would theoretically give us a more accurate representation, but the objective is to select a number of students from each course and there would be a representative sample of the entire primary.
