Answer:
B
Step-by-step explanation:
Mathematically, we shall be using the z-score here
Z-score = (x-mean)/SD
From the question, mean = 80 and SD = 4
So we want to get the option in the question that has a z-score of 1 or below
Let’s look at 75
80-75 = 5 ( this is clearly above 1 standard deviation of 4)
For 77;
80 -77 = 3
This is less than the standard deviation of 4, meaning it is within 1 standard deviation of the mean
If you do the math you'll get 3/4 of the bag is dirt.
No, Aileen's mom is incorrect. Aileen can read 30 pages in the same time period as her friend reads 20 pages.
To get this answer, you multiply 20 by 1.5
20 x 1.5 = 30
If the increase is x% per year, the multiplier each year is 1+x (expressed as a decimal).
Bozeman = 27,509·1.0196^t
Butte = 32,370·0.9971^t
where t is the number of years after 1990.
Answer:
91
Step-by-step explanation:
40/.44
