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Irina-Kira [14]
3 years ago
9

PLEASE ANSWER IM BEING TIMED HELPP

Mathematics
2 answers:
sesenic [268]3 years ago
8 0

Answer:69.92

Step-by-step explanation:

solniwko [45]3 years ago
5 0

Answer:

Since each stamp is about $0.50, the total cost is approximately 4 × 0.5 = $2.00.

Step-by-step explanation:

just took test

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Compare. the values and order them from least to greatest. 3.65 feet 4.1 feet 3 11/16 feet
BlackZzzverrR [31]
First, you need to convert all the numbers into the same form, this can be done by dividing 11 by 16, to get your decimal, doing this, we see that 3 11/16 ≈ 3.69
Then, just arrange your numbers, in order from least, to greatest.
3.65, 3.69, 4.10
7 0
4 years ago
A car is priced at $12000. which is the better deal 10% off or $1500 cash back
Elan Coil [88]
0.90(12000) = 10,800
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3 years ago
A consumer group selected 100 different airplanes at random from each of two large airlines. The mean seat width for the 100 air
Novay_Z [31]

Answer:

Decreasing the sample size decreases the width of the confidence interval.

Step-by-step explanation:

-Let s be the sample standard deviation and \bar X be the sample mean.

#We calculate the 95% confidence interval for the sample size 100 as below:

\bar X\pm z_{0.05/2}\frac{s}{\sqrt{n}}\\\\\\=\bar X\pm 1.960\times\frac{s}{\sqrt{50}}\\\\\\=\bar X\pm 0.1960s

#we then calculate the confidence interval of sample size =50 and of similar mean and standard deviation:

\bar X\pm z\frac{s}{\sqrt{n}}\\\\\\=\bar X\pm z_{0.05/2}\times\frac{s}{\sqrt{n}}\\\\\\=\bar X\pm1.960\times \frac{s}{\sqrt{50}}\\\\\\\\=\bar X\pm0.2772s

#Notice that the smaller sample(n=50) has a narrower confidence interval.

Hence, decreasing the sample size decreases the width of the confidence interval.

6 0
3 years ago
Read 2 more answers
The length of a rectangle is 3 times twice the width. The perimeter is 36. What are the side lengths?
Svetllana [295]

Answer & Explanation:

For this question, you need to figure out the length and the width because the area is directly related to them (A = l*w).

What we do know is that the perimeter is 36 inches. Since the perimeter is equal to P = 2l + 2w, we can say:

P = 36 = 2(3 + 2w) + 2(w), where the length l is 3 + 2w

Solve for w first, then solve for l. Use these values to find the area.

Pls, choose me as brainliest!

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2 years ago
Please help!!!!!!!!!! Me
lisabon 2012 [21]
If were talking about the second one it would be 8 mins because by the time 6 is down to 2 it would be 8 mins and since 10 fl oz is going down every 1 min it would be 2 fl oz by the time it is at 8 mins
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3 years ago
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