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Leto [7]
3 years ago
15

I speak without a mouth and hear without ears. I have no body, but I come alive with wind. What am I?

Mathematics
2 answers:
Genrish500 [490]3 years ago
5 0

Answer:

Step-by-step explanation:

IgorC [24]3 years ago
3 0

Answer:

An echo

Step-by-step explanation:

You might be interested in
X + y = 3 . If y = 3, find the value of x
agasfer [191]

Answer:

0

Step-by-step explanation:

x + y = 3

y = 3

=> x + 3 = 3

=> x = 3 - 3

=> x = 0

6 0
3 years ago
Read 2 more answers
A study of long-distance phone calls made from General Electric Corporate Headquarters in Fairfield, Connecticut, revealed the l
lesya692 [45]

Answer:

The probability that a call last between 4.2 and 4.9 minutes is 0.4599

Step-by-step explanation:

Let X be the length in minutes of a random phone call. X is a normal distribution with mean λ=4.2 and standard deviation σ=0.4. We want to know P(4.2 < X < 4.9). In order to make computations, we will use W, the standarization of X, given by the following formula

W = \frac{X-\mu}{\sigma} = \frac{X-4.2}{0.4}

We will use \phi , the cummulative distribution function of W. The values of \phi are well known and the can be found in the attached file

P(4.2 < X < 4.9) = P(\frac{4.2-4.2}{0.4} < \frac{X-4.2}{0.4} < \frac{4.9-4.2}{0.4}) = P(0 < W < 1.75) = \\ \phi(1.75) - \phi(0) = 0.9599-0.5 = 0.4599

We conclude that the probability that a call last between 4.2 and 4.9 minutes is 0.4599

Download pdf
7 0
3 years ago
If the standard deviation of the data values in a sample is 17, what is the variance of the data values
Bess [88]
Std dev = sqrt of variance

hence variance would be 17^2= 289
7 0
3 years ago
Read 2 more answers
70 POINTS SHOW WORK
lord [1]
Area of triangle = 1/2 x base x height

so old triangle we have  1/2 x b x h = 48

new triangle has base 3 times as long and height is half as long
 so we would get:

1/2 x (3B) x (1/2H) = area

rewrite as 1/2 x 3/2 x b x H = area

divide by original are os 1/2 x b x h and you end up with 3/2

so new area = 3/2 x old area

new area = 3/2 * 48 = 72 square inches
8 0
3 years ago
Read 2 more answers
(Ill give brainliest)
Anna007 [38]

Answer:

522

Step-by-step explanation:

3 0
2 years ago
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