Answer:
45
Step-by-step explanation:
1 yard= 3 feet
Answer:
3, 4, 7
Step-by-step explanation:
In order to solve inequalities, you want to isolate the variable.
Subtract 3 from both sides to give you (I can't put the greater than or less than or equal to with the line underneath, so just imagine that it's there)
-8 <-4r
Divide both sides by -4 to get the r by itself.
-8÷-4=2
2<r
Two is less than or equal to r, or you can word it r is greater than or equal to 2. So now you look at your options, and choose the ones that are greater than 2. 3, 4, and 7 are all greater than 2.
Answer:
its c????
Step-by-step explanation:
Answer:

Step-by-step explanation:
1) Previous concepts
Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".
The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".
Let X the random variable that represent the GRE score at the University of Pennsylvania for the incoming class of 2016-2017, and for this case we know the distribution for X is given by:
And let
represent the sample mean, the distribution for the sample mean is given by:

On this case 
2) Calculate the probability
We want this probability:

The best way to solve this problem is using the normal standard distribution and the z score given by:

If we apply this formula to our probability we got this:

and rounded would be 0.928