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brilliants [131]
3 years ago
13

The length of a text messaging conversation is normally distributed with a mean of 2 minutes and a standard deviation of 0.5 min

utes. What is the probability that a conversation lasts longer than 3 minutes?
Mathematics
1 answer:
zhenek [66]3 years ago
5 0

Answer:

Let x be a random variable representing the length of a text messaging conversation, then

P(x > 3) = 1 - P(x < 3) = 1 - P(z < (3 - 2)/0.5) = 1 - P(z < 2) = 1 - 0.97725 = 0.02275

jorelis
2 years ago
thank you so much
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melomori [17]

The length of the radius will be 22 units.

<h3>What is the radius?</h3>

The radius of a circle is defined as the distance of the center of the circle to its outer layer. It is a locus of a point present at some distance from the center point.

Now from the question, we have an expression:

r=(\dfrac{6}{85} )\times(\dfrac{85}{12} )\times (\dfrac{121}{36} )\times (\dfrac{157}{12} )

By solving the above equation we get

r=(\dfrac{18997}{864} )

r=22

Hence the length of the radius will be 22 units.

To know more about radius follow

brainly.com/question/24375372

6 0
2 years ago
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The square of a number xx is 33. The number xx is between what two consecutive whole numbers?
Ipatiy [6.2K]
5 and 6. square of 5 is 25 and square of 6 is 36. must be between 5 and 6
6 0
3 years ago
Help me please!!! I give more points and brainliast please help me!
fiasKO [112]

Hey there!!

Fill in the blanks :-

⇒ First graph the line. Locate the <u>value of x </u>on the x-axis. Draw a vertical line from <u>point plotted on the x-axis </u>to the graph of the function and a horizontal line segment from the graph of the function to the y-axis.

<em>Find the value of f(x) when x is -2. </em>

f(x) = \frac{3}{2}x-4

Remember :- <u><em>f(x) is basically the y-value. It is just denoted as _f(x), it stands for function of x. Which means, the value of y, depends upon the value of x or the function of x. </em></u>

Given : x = - 2

Plugging in the values :

... f(-2) = \frac{3*(-2)}{2}-4

... f(-2) = \frac{-3}{1} - 4

... f(-2) = -7

The last fill in the blank :

The value of y on the y-axis is the value of the function. Therefore, the value of f(x) is <u>-7 </u>when x is -2.

Hope it helps!!



7 0
3 years ago
t takes Dariya 35 seconds to download 5 songs from the Internet. How can the number of seconds it would take Dariya to download
Vitek1552 [10]
She would be able to download 49 at this rate.
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8 0
3 years ago
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Use the formula A = P(1 + r)" to solve.
Llana [10]

Answer:

Rate = 0.45 or 45%.

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1 + r = 1.45

r = 1.45 - 1 = 0.45.

7 0
2 years ago
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