Answer:
When dividing numbers with the same base, you subtract the exponents.
Step-by-step explanation:
For example, 8^5/8^3 = 8^2 or 64
Answer:
129 degrees.
Step-by-step explanation:
As we can see, angle DCF is made up of 2 different angles, DCE and ECF, the sum of the measure of these two angles is equal to the measure of angle DCF.
75+54=129 degrees
Hope it helps!
Answer:
1. 
2. 
3. 
4. 
5. 
Step-by-step explanation:
The average mortgage owed by Americans is $306,500, with a standard deviation of $24,500.
From the above information, we know that,
The population mean is
The population standard deviation is
Suppose a random sample of 150 Americans is selected
Since the sample size is quite large then according to the central limit theorem, the sample mean is approximately normally distributed.
The sample mean would be the same as the population mean that is
The sample standard deviation is given by
Where 
is the population standard deviation and n is the sample size.
Therefore, the required parameters are:
1.
2.
3.
4.
5.
Answer:
Exact Form:
1/25
Decimal Form:
0.04
Step-by-step explanation:
Make sure you multiply. That should get you to your answer.
Hope this helps.
A)
Let X be the food expenditure of a family.
Let the population mean of an expenditure of a family be.
Let the population standard deviation of an expenditure of a family be.
The proportion families spend more than $30 but less than $490 per month on food is,
