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adelina 88 [10]
2 years ago
15

Sharon wants to open a checking account from which to pay bills. She wants online services, and a debit card, which both banks p

rovide for free. Based upon past experience, she expects to accidentally overdraft the account 1 time per year, due to unexpected charges and miscommunications. She expects no 2nd copies of statements, and to use network ATMs 4 times per month with either bank. She has $3300 in an emergency savings account at First State Bank, and thinks that the balance will be enough to cover overdrafts in the future if automatic transfers are made when needed. A 4-column table with 5 rows. Column 1 is labeled First State Bank with entries monthly fee, non-sufficient funds fee, second copy of statement, network A T M usage, non-sufficient funds protection from a First State Bank savings account. Column 2 is labeled Description with entries 4 dollars, 36 dollars, 7 dollars, 3 dollars each transaction, 4 dollars on each day that a transfer occurs to cover an overdraft. Column 3 is labeled Common Bank with entries monthly fee, non-sufficient funds, second copy of statement, network A T M usage, non-sufficient funds protection from a Common Bank savings account. Column 4 is labeled Description with entries 0 dollars, 24 dollars, 4 dollars, 2 dollars each transaction, not offered with this account. Based on the tables of fees, above, if Sharon chooses First State Bank, will it save her money over choosing Common Bank? a. No, Common Bank will save Sharon more money. B. Yes, First State Bank will save Sharon money. C. No, First State Bank and Common Bank would have the same costs for Sharon. D. No, costs cannot be estimated in advance, so this information cannot be used.
Mathematics
1 answer:
Elena-2011 [213]2 years ago
7 0

Answer:

A! If correct, please mark me brainiest!

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The amount of time all students in a very large undergraduate statistics course take to complete an examination is distributed c
Anestetic [448]

Answer:

a) The mean is \mu = 60

b) The standard deviation is \sigma = 9

Step-by-step explanation:

Normal Probability Distribution:

Problems of normal distributions 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.

The probability a student selected at random takes at least 55.50 minutes to complete the examination equals 0.6915.

This means that when X = 55.5, Z has a pvalue of 1 - 0.6915 = 0.3085. This means that when X = 55.5, Z = -0.5

So

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

-0.5 = \frac{55.5 - \mu}{\sigma}

-0.5\sigma = 55.5 - \mu

\mu = 55.5 + 0.5\sigma

The probability a student selected at random takes no more than 71.52 minutes to complete the examination equals 0.8997.

This means that when X = 71.52, Z has a pvalue of 0.8997. This means that when X = 71.52, Z = 1.28

So

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

1.28 = \frac{71.52 - \mu}{\sigma}

1.28\sigma = 71.52 - \mu

\mu = 71.52 - 1.28\sigma

Since we also have that \mu = 55.5 + 0.5\sigma

55.5 + 0.5\sigma = 71.52 - 1.28\sigma

1.78\sigma = 71.52 - 55.5

\sigma = \frac{(71.52 - 55.5)}{1.78}

\sigma = 9

\mu = 55.5 + 0.5\sigma = 55.5 + 0.5*9 = 55.5 + 4.5 = 60

Question

The mean is \mu = 60

The standard deviation is \sigma = 9

6 0
3 years ago
Factorize (2a-b)^2 -4(2a-b) -13
SpyIntel [72]

Answer:

Hello!

`~~~~~~~~~~~~`

(2a-b)^2 -4(2a-b) -13 =

v = 4a^{2} - 4ab + b^{2} - 8a +4b - 13

~~~~~~~~~~~~`

Step-by-step explanation: All you have to do is Factor the polynomial.

Hope this helped you. Brainliest would be nice!

______________❤︎______________

6 0
3 years ago
The point where two rays meet to form an angle is called the _______________.
Alenkinab [10]
<span>The point where two rays meet to form an angle is called the
Vertex
and vertex became an angle
the corner of polygon are also called vertex
so i conclude option A is correct from above
hope it helps</span>
4 0
3 years ago
I need help REALLY FAST what is the distance between the points (-1, -3 3/4) and (-1, 4 1/2) ?
kodGreya [7K]

Answer:

8 1/4

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right<u> </u>

<u>Algebra I</u>

  • Coordinates (x, y)

<u>Algebra II</u>

  • Distance Formula: \displaystyle d = \sqrt{(x_2-x_1)^2+(y_2-y_1)^2}

Step-by-step explanation:

<u>Step 1: Define</u>

<em>Identify</em>

Point (-1, -3.75)

Point (-1, 4.5)

<u>Step 2: Find distance </u><em><u>d</u></em>

Simply plug in the 2 coordinates into the distance formula to find distance <em>d</em>

  1. Substitute in points [Distance Formula]:                                                         \displaystyle d = \sqrt{(-1--1)^2+(4.5--3.75)^2}
  2. [√Radical] (Parenthesis) Subtract:                                                                   \displaystyle d = \sqrt{(0)^2+(8.25)^2}
  3. [√Radical] Evaluate exponents:                                                                       \displaystyle d = \sqrt{0+68.0625}
  4. [√Radical] Add:                                                                                                 \displaystyle d = \sqrt{68.0625}
  5. [√Radical] Evaluate:                                                                                          \displaystyle d = 8.25
4 0
3 years ago
How to find r in this equation using combination formula C(8,r)=28<br>​
slavikrds [6]

Answer:

r = 2

Step-by-step explanation:

We have the formula of ^nC_r = \frac{n!}{r! (n-r)!}

Now, it is given that ^8C_r = \frac{8!}{r! (8-r)!} = 28 ........ (1)

And we have to find the value of r which satisfy the above equation.

So, r! (8-r)! = \frac{8!}{28} = \frac{40320}{28} = 1440

Now, we have to use the trial method to find the value of r.

For r = 1, 1! (8-1)! = 7! = 5040 \neq 1440

Hence, r can not be 1.

Now, put r = 2, 2! (8-2)! = 2 \times 6! = 1440

Therefore, r = 2 (Answer)

5 0
3 years ago
Read 2 more answers
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