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Gala2k [10]
3 years ago
11

On a hiking trail​ map, the distance from mountain peak A to mountain peak B is 12.3 inches. The actual distance is about​ 1,000

miles. What is the distance on the same map from river A to river B if the actual distance is about 100​ miles?
Mathematics
1 answer:
vampirchik [111]3 years ago
3 0

Answer:

The distance of the rivers on the map is of 1.23 inches.

Step-by-step explanation:

We use proportions to solve this question, by a rule of three.

We have that:

If the actual distance is of 1000 miles, the distance on the map is of 12.3 inches. If the actual distance is 100 miles, what will be the distance on the map?

1000 miles - 12.3 inches

100 miles - x

Applying cross multiplication

1000x = 12.3*100

1000x = 1230

x = \frac{1230}{1000}

x = 1.23

The distance of the rivers on the map is of 1.23 inches.

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devlian [24]

Answer:

s=10

Step-by-step explanation:

Basically, the range rule-of-thumb is that the range is generally about four times the standard deviation.

<u>First, we find the range:</u>

Range=Maximum-Minimum

Range=100-60

Range=40

<u>Next, divide the range by 4 to get the standard deviation</u>

Range=4(Standard Deviation)

40=4(Standard Deviation)

10=Standard Deviation

Therefore, s=10, which is the standard deviation

6 0
2 years ago
Read 2 more answers
Apply the distributive property to factor out the greatest common factor. {24a - 18b}
Simora [160]

Answer:

Step-by-step explanation:

{24a -18b}

=6 {4a-3b}

7 0
3 years ago
Of the u.s states 4 have names that start with letter w. What percentage of the u.s states have names that start with the letter
Dima020 [189]
Washington, West Virginia, Wyoming, Wisconsin.

4/50=80%

Hope that helps
8 0
3 years ago
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Goddesboi<br><br><br><br> this one!<br><br><br><br> what’s the answer?<br><br><br> thanks ^^
xz_007 [3.2K]

Answer:

C) 20.97 AED

Step-by-step explanation:

To find the expected value, E(X), or mean μ of a discrete random variable X, simply multiply each value of the random variable by its probability and add the products. The formula is given as \displaystyle E(X)=\mu=\sum xP(x).

Here, x represents values of the random variable X, P(x) represents the corresponding probability, and symbol \displaystyle \sum represents the sum of all products xP(x). Here we use the symbol \mu for the mean because it is a parameter. It represents the mean of a population.

In this case, the expected value of the ticket is \displaystyle E(X)=\mu=\sum xP(x)=12(0.08)+18(0.15)+20(0.31)+22(0.08)+24(0.15)+25(0.23)=20.97

This means that Ahmad can expect to win 20.97 AED for the ticket.

7 0
2 years ago
An automobile shop manager timed 27 employees and recorded the time, in minutes, it took them to change a water pump. Assuming n
SSSSS [86.1K]

Answer:

Excel attached with the solution.

Step-by-step explanation:

Mean

\bar{x}=\frac{\sum x_{i}}{n}

Standard deviation

sd=\sqrt{\frac{\sum (x_{i}-\bar{x})}{n-1}}

Confidence interval

\bar{x} \pm z_{\alpha}*sd/\sqrt{n}

The formulas used are in the Excel file attached.

Download xlsx
6 0
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