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3 years ago

Describe the pattern below 3 6.5 11 16.5 23

1 answer:

5 0

6.5 - 3 = 3.5
11 - 6.5 = 4.5
16.5 - 11 = 5.5
23 - 16.5 = 6.5

From this, you can see that the number being added is increasing by 1 each time.

Therefore, the pattern is adding 3.5, then 4.5, then 5.5, then 6.5, and so on.

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A random sample of 100 automobile owners in thestate of Virginia shows that an automobile is driven onaverage 23,500 kilometers

Anastaziya [24]

Answer:

a) 22497.7 < μ< 24502.3

b) With 99% confidence the possible error will not exceed 1002.3

Step-by-step explanation:

Given that:

Mean (μ) = 23500 kilometers per year

Standard deviation (σ) = 3900 kilometers

Confidence level (c) = 99% = 0.99

number of samples (n) = 100

a) α = 1 - c = 1 - 0.99 = 0.01

$\frac{\alpha }{2} =\frac{0.01}{2}=0.005\\ z_{\frac{\alpha }{2}}=z_{0.005}=2.57$

Using normal distribution table, $z_{0.005$ is the z value of 1 - 0.005 = 0.995 of the area to the right which is 2.57.

The margin of error (e) is given as:

$e= z_{0.005}\frac{\sigma}{\sqrt{n} } = 2.57*\frac{3900}{\sqrt{100} } =1002.3$

The 99% confidence interval = (μ - e, μ + e) = (23500 - 1002.3, 23500 + 1002.3) = (22497.7, 24502.3)

Confidence interval = 22497.7 < μ< 24502.3

b) With 99% confidence the possible error will not exceed 1002.3

5 0

3 years ago

Que numero multiplicado por -8 da como resultado 72

Bumek [7]

Answer:

2×72 = 144

Step-by-step explanation:

¡Aquí puedes aprender todo sobre las multiplicaciones! HAGA CLIC PARA TWITTEAREntonces, la multiplicación 2 x 72 es una suma abreviada.

3 0

3 years ago

Write 124 in scientific notation.

Artemon [7]

Answer:

Step-by-step explanation:

Write 124 in scientific notation.

Then, in scientific notation, 124 is written as 1.24 × 102. Actually, converting between "regular" notation and scientific notation is even simpler than I just showed, because all you really need to do is count decimal places.

6 0

2 years ago

Read 2 more answers

The theater department charged $5 per ticket for admission to the fall play, My Fair Lady. Additionally, they asked for a donati

barxatty [35]

Answer:

$(400+80x)

Step-by-step explanation:

We are required to find the total income on Friday Night

Ticket costs $5 each and they sold 80 tickets

Total ticket Sales = 80 X $5 =$400

There was a donation of $x per ticket, so for 80 tickets, there was a donation of $80x.

Total Income on Friday Night=Ticket Sale+Donations= $(400+80x)

3 0

3 years ago

55.27 is the same as 55 ____' 12".

choli [55]

27100(60)=815=1615 The 16 is how many minutes you have. If you were not given the seconds, we would have to say that we have a remainder of (1/5) of a minute. Since 1 minute is (1/60), one-fifth of that is (1/300). Now we would need to see how many seconds that gives us. 1 second is (1/3600) of a degree, so we would need to divide (1/300) by (1/3600). Doing this gives us: 1300÷13600=1300(3600)=12

5 0

3 years ago