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ollegr [7]
3 years ago
8

Many ATM machines in Las Vegas casinos charge a $6 fee each time a person withdraws money. If Adam used the ATM 3 times last Sat

urday at the Bellagio in Las Vegas, how much money was taken out of his checking account in ATM fees?
Mathematics
1 answer:
jok3333 [9.3K]3 years ago
3 0

Answer:

$18

Step-by-step explanation:

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A police officer would like to estimate the proportion of petty theft cases that have gone unsolved in a large city. He takes a
nata0808 [166]

Answer:

0.625 \pm 1.645*0.0571

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

\pi is the estimate

z is the zscore that has a pvalue of 1 - \frac{\alpha}{2}, also called the critical value.

The standard error is:

s = \sqrt{\frac{\pi(1-\pi)}{n}}

90% confidence level critical value

So \alpha = 0.1, z is the value of Z that has a pvalue of 1 - \frac{0.1}{2} = 0.955, so z = 1.645.

Estimate:

72 petty theft cases and finds 45 of these have gone unsolved.

So \pi = \frac{45}{72} = 0.625

Standard error:

s = \sqrt{\frac{\pi(1-\pi)}{n}} = \sqrt{\frac{0.625*0.375}{72}} = 0.0571

Answer:

0.625 \pm 1.645*0.0571

7 0
3 years ago
Whats is a 3 step problem that can represent the expression 3x + (-5) = 19
GrogVix [38]

Answer:

x=8

Step-by-step explanation:

3x-5=19\\

The first step is to add -5 to both sides:

(3x-5)+5=19+5\\3x=24

The next step is to divide 3 on both sides:

\frac{3x}{3} =\frac{24}{3}

x=8

3 0
2 years ago
Solve the equation: (4x - 5)^4 = 81.​
Anton [14]

hope this helps

by

aman10we

4 0
1 year ago
Caleb made a scale drawing of a neighborhood park. The scale of the drawing was
WITCHER [35]

Answer:

2:1 =36mm: x m

2/1 = 36mm/ m......(Criss cross)

36mm x 1M/2mm = 18 Meter

5 0
3 years ago
How do you find scale factor
Lerok [7]
First, a scale factor is the ratio of the corresponding sides in two similar geometric figures.

To find the scale factor:
1. Locate two corresponding sides (one on each figure).
2. Write the ratio of one length to the other.
And there you go! That's the scale figure from one figure to the other

Hope that helps and correct me if I'm wrong!

7 0
3 years ago
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