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Masja [62]
3 years ago
5

Bob currently has $1,000 in a saving account he saves $25 per month he saves the same amount each month and does not take any mo

ney out of the account and how many months will boris have 1,450
Mathematics
1 answer:
erastova [34]3 years ago
4 0
In 18 months he will have 1450
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Suppose that the IQs of university​ A's students can be described by a normal model with mean 150150 and standard deviation 77 p
NeX [460]

Answer:

The probability that the​ student's IQ is at least 140 points is of 55.17%.

Step-by-step explanation:

Problems of normally distributed samples can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

University A: \mu = 150, \sigma = 77

a) Select a student at random from university A. Find the probability that the​ student's IQ is at least 140 points.

This is 1 subtracted by the pvalue of Z when X = 140. So

Z = \frac{X - \mu}{\sigma}

Z = \frac{140 - 150}{77}

Z = -0.13

Z = -0.13 has a pvalue of 0.4483.

1 - 0.4483 = 0.5517

The probability that the​ student's IQ is at least 140 points is of 55.17%.

3 0
3 years ago
3 1/3 - 2 2/5 what is the answer?
AURORKA [14]
One way to solve this is by changing the mixed numbers to improper functions. 
3 1/3 = 10/3
2 2/5 = 12/5

The next step I would take is to find a common denominator.
10/3 = 50/15
12/5 = 36/15

Now we can solve the original equation: 
50/15 - 36/15 = 14/15

Since 14/15 is already simplified this is your final answer.
7 0
2 years ago
Sanjay has $65 to spend at the mall. He bought a t-shirt for $18. If he want to but a pair of jeans how much can he spend​
Sergeeva-Olga [200]

answer

$47 because $65 minus $18 is $47

4 0
3 years ago
Read 2 more answers
StartFraction 12 minus 3 y Over 2 EndFraction plus y StartFraction 2 y minus 4 Over y EndFraction for y = 3.
Neko [114]
Answer:
Step-by-step explanation:
The point slope form of the equation is expressed as
y - 7/2 = 1/2(x - 4)
Comparing with the point slope form of an equation which is expressed as
y - y1 = m(x - x1)
m represents slope
Therefore
m = 1/2
y1 = 7/2
x1 = 4
The slope intercept form of the equation of a straight line is expressed as
y = mx + c
Where c represents the intercept
Substituting y = 7/2, m = 1/2 and x = 4 into y = mx + c, it becomes
7/2 = 1/2 × 4 + c
7/2 = 2 + c
c = 2 - 7/2 = (4 - 7)/2 = - 3/2
Therefore, the y intercept is - 3/2
7 0
3 years ago
Read 2 more answers
Can someone help me with this? Please and thank you!
sergiy2304 [10]

Answer:

She should find the squares between 4.2 and 4.3

Step-by-step explanation:

The square of 4.2 was too low and the square for 4.3 was too high so the answer is between the two.

5 0
2 years ago
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