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2 years ago

HELP URGENTLY NEEDED STUCK ON THIS FOR 2 DAYS!!!!! LOTS OF POINTS FOR PERSON WHO HELPS!!!

Mathematics

1 answer:

trapecia [35]2 years ago

6 0

Answer:

Step-by-step explanation:

2b meaning two times the age then add three like the question says.

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How many 5-letter passwords can be created if no letter can be used twice within the password?

bonufazy [111]

26*25*24*23*22=7893600

or you can use

26!/(26-5)!=7893600

5 0

2 years ago

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Find the unit rate for miles per gallon

boyakko [2]

Answer:

30 miles per gallon

Step-by-step explanation:

I jus Done this one

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2 years ago

The manager of a bank recorded the amount of time each customer spent waiting in line during peak business hours one Monday. The

zavuch27 [327]

The standard deviation of the frequency distribution is 5.54

<h3>How to determine standard deviation?</h3>

The table of values is given as:

x f(x)

0-3 13

4-7 13

8-11 10

12-15 11

16-19 0

20-23 3

Rewrite the table by calculating the class midpoints:

x f(x)

1.5 13

5.5 13

9.5 10

13.5 11

17.5 0

21.5 3

Start by calculating the mean using:

$\bar x = \frac{\sum fx}{\sum f}$

This gives

$\bar x = \frac{1.5 * 13 + 5.5 * 13 + 9.5 * 10 + 13.5 * 11 + 17.5 * 0 + 21.5 * 3}{13 + 13 + 10 + 11 + 0 +3}$

Evaluate

$\bar x = 7.98$

The standard deviation is then calculated as:

$\sigma = \sqrt{\frac{\sum f(x - \bar x)^2}{\sum f }}$

So, we have:

$\sigma= \sqrt{\frac{13 * (1.5 - 7.98)^2 + 13 * (5.5 - 7.98)^2 + (9.5 - 7.98)^2 * 10 + (13.5 - 7.98)^2 * 11 + (17.5 - 7.98)^2 * 0 + (21.5 - 7.98)^2 * 3}{13 + 13 + 10 + 11 + 0 +3}}$

Evaluate

$\sigma= \sqrt{30.6496}$

Solve

$\sigma= 5.54$

Hence, the standard deviation is 5.54

Read more about standard deviation at:

brainly.com/question/15858152

#SPJ1

7 0

1 year ago

Question 3

DanielleElmas [232]

It would be -6. -4-6 is -10

6 0

2 years ago

A worker has dug 5 holes for a fence post. It will take 20 minutes to dig each addional

anzhelika [568]

Answer:

it 100

Step-by-step explanation:

firs take the zero then time with the 5 it would give 10 n

then add the zero so 100

5 0

1 year ago