Answer:
10.15
Step-by-step explanation:
I divided the worth of clothe and the tax
Answer:
c. 0.0142
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 interest on this case, 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) Solution to the problem
We want this probability:
The question on this case is ".Find the probability that the average price for 30 gas stations is less than $4.55". So then our value for n=30.
If we apply the formula for the z score to our probability we got this:
And using the normal standard table or the following excel code we calculate the probability "=NORM.DIST(-2.19,0,1,TRUE)"
$50,400
Multiply $2,000 by 0.05 (because that's 5% converted to decimal) and you should get $100. Add that to $2,000 (which is $2,100) and multiply it by 4 because you're depositing 4 times a year. You should then get $8,400 and multiply it by 6 and you get your answer
One side is -4.
It can also be x + 4.
Turn 16 + 8x + x^2 into standard form —> x^2 + 8x + 16
Note: standard form is ax^2 + bx + c
Use the “foil” method to factor.
(x + 4)(x + 4)
x=-4
Answer:
n=4p
Step-by-step explanation:
1. group like terms: -7p+5n+3n=25p
2. add similar elements, 5n +3n = 8n --> -7p+8n=25p
3. add 7p to both sides: -7p+8n+7p=25p+7p
4. simplify : 8n=32p
5. divide both sides by 8:
6. evaluate: n=4p