Answer:
a) The variable of the study is: milligrams of nitrogen per liter of water.
This is the amount that needs to be measured and analyzed to reach conclusions in the study.
b) The variable is quantitative. The quantitative variables are those that represent quantities. This variables can be measured on a continuous or discrete scale. Then, all the variables that you can measure or count are quantitative variables(height of trees, number of passengers per car, wind speed, milligrams of nitrogen per liter, etc). On the other hand, qualitative variables are those that can’ t be measured, and they represent attributes, like apple colors (red, green), size of trousers (small, medium, large) and so on.
c) The population under study is the milligrams of nitrogen per liter of water that are in the entire lake. You can estimate the parameters of the population by taking samples (In the example, 28 samples are taken).
B is the answer hope this helps :)
No, because 3 feet equals to 1 yard. If there is 24 feet then there is 8 yards.
3feet=1 yard
6feet=2yards
9feet=3yards
12feet=4yards
15feet=5yards
18feets=6yards
21feet=7yards
24feet=8yards
Answer:
Step-by-step explanation:
The first one.
You would be subtracting two perfect squares.
A^2 - B^2 = 0
That is the formula for a quadratic difference of squares equation to find zeros.
Hope this helps!