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n200080 [17]
3 years ago
12

Twenty different video games showing alcohol use were observed. The duration times of alcohol use ​(in seconds) were recorded.

Mathematics
1 answer:
Crazy boy [7]3 years ago
8 0

Answer:

Degree of freedom = 19

Step-by-step explanation:

We are given the following information in the question:

Sample size, n = 20

For a t-test hypothesis it was claimed that the population mean is greater than 89 ​second.

1) df

Df denotes the degree of freedom.

  • The Degrees of Freedom refers to the number of values involved in the calculations that have the freedom to vary.

2) Degree of freedom  = n - 1

where n is the sample size

Degree of freedom = 20 - 1 = 19

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Create a real world problem that corresponds to 100+25x=3x+75
bonufazy [111]
Jane has $100 and gets $25 a week from her dad. Rafael has $75 and his dad gives him $3 a week. in how many weeks will there sum of money be equal to each other ?
8 0
3 years ago
Solve for x: 4 = (–8) +3x show your work
Triss [41]
4 = (-8) + 3x

Firstly, you can rearrange the equation to make it easier to read:
3x - 8 = 4

Add 8 on both sides to isolate the x:
3x = 12

Divide both sides by 3:
x = 4

6 0
3 years ago
I need the answer for number 8<br><br> 13 points
Leno4ka [110]
I hope this helps you



9x-2=12


9x=14


x=14/9


x= 1,555555



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B
3 0
3 years ago
Read 2 more answers
Calculate annually compounded interest
Hunter-Best [27]

Answer:

$2,851.80

Step-by-step explanation:

Lets use the compound interest formula to solve:

A=P(1+\frac{r}{n} )^{nt}

<em>P = initial balance</em>

<em>r = interest rate (decimal)</em>

<em>n = number of times compounded annually</em>

<em>t = time</em>

First, change 1.1% into a decimal:

1.1% -> \frac{1.1}{100} -> 0.011

Next, plug the values into the equation:

A=2,700(1+\frac{0.011}{1})^{1(5)}

A=2,851.80

She will have $2,851.80 after 5 years.

3 0
3 years ago
The power P produced by a wind turbine is directly proportional to the cube of the wind speed S. A wind speed of 37 miles per ho
vfiekz [6]

Answer:the output for a wind speed of 40 miles per hour is 810.8 kilowatts.

Step-by-step explanation:

The power P produced by a wind turbine is directly proportional to the cube of the wind speed S. This means that

P is directly proportional to S

Introducing a constant of proportionality, k, it becomes

P = kS

A wind speed of 37 miles per hour produces a power output of 750 kilowatts. This means that

750 = k × 37

k = 750/37 = 20.27

The expression becomes

P = 20.27S

Therefore, the output for a wind speed of 40 miles per hour would be

P = 20.27 × 40

P = 810.8

6 0
3 years ago
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