Answer:
Step-by-step explanation:
Since your population are the students in math class, you can use the z-score formula in order to comparing the two math test scores. Where is the mean for the class, is the standars deviation and x is Mary score.
For the first test , so ,.
For the second test , so ,
Mary do better in the second test, relative to the rest of the class (because , it means the second score is nearer to the mean score of the class than the first one )
Answer:
but i would say t t f t
Step-by-step explanation:
Are u wrong or right
Answer:
What is this for?
Step-by-step explanation:
Answer:
9%
Step-by-step explanation:
Calculation for What percentage is her salary
Using this formula
Dianes salary percentage=Car payments per year/Salary per year
Let plug in the formula
Dianes salary percentage=$2,880 per year/$32,000 per year
Dianes salary percentage=0.09*100
Dianes salary percentage=9%
Therefore the percentage of her salary is 9%
82.300 * x percent = 69.955
To solve this equation you have to transpose it:
x percent = 69.955/82.300 = 0,85 = 85%
That's the percentage of 69.955 of 82.300.
So the last step is to subtract it from 100%:
100% - 85% = 15 % --> percent of decrease