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frozen [14]
3 years ago
12

The times a musician spends performing a rock song and a country song are approximately Normally distributed. The rock song has

a mean time of 133 seconds with a standard deviation of 3.5 seconds, and the country song has a mean time of 126 seconds with a standard deviation of 3.3 seconds. If the musician randomly selects 4 times the rock song is played and 3 times the country song is played, what is the probability that the mean time for the rock song is less than the mean time for the country song?
0.0034
0.0365
0.9964
0.9966
Mathematics
1 answer:
VikaD [51]3 years ago
8 0

Answer:

A. 0.0034

Step-by-step explanation:

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Describe the image when a scalene triangle is rotated 180 degrees counterclockwise
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Answer:

It is a same size scalene triangle as the original triangle.

Step-by-step explanation:

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3 years ago
Read 2 more answers
For example( and this is straight from the paper), "15 people in 3 equal rows."
densk [106]
At a race, there are 3 rows with 15 people in each row. How many total people are there?

Numerical expression- 15 times 3

(Idk if this helped very much but it's worth a shot)
6 0
3 years ago
Quadrilateral ABCD is dilated by a scale factor of 1 over 3 centered around (1, 2). Which statement is true about the dilation?
Sonbull [250]

<em>Note: Since you missed to add the figure. So, after a little research I am kind of able to find the figure and hence, assuming it as a reference. Hence, I am attaching the figure and solution of that figure is also visible in the same figure.</em> Please check the attached figure (a)

Answer:

Segment B'D' will be parallel to segment BD and will be shorter than segment BD. Please see the attached figure (a) for better understanding.

Step-by-step explanation:

As we know that there are certain rules when a quadrilateral is dilated by a certain scale centered around a certain point.

So,

Let suppose P(a, b) is the point.

The dilation rule by a scale factor of 1 over 3 or (1/3) centered around (1, 2) is

P(a, b) → P(\frac{x+2}{3}, \frac{y+4}{3})

Hence,

            A(1, 2) → A'(1, 2)

            B(2, 3) → B'(4/3, 7/3)

            C(4, 2) → C'(2, 2)

             D(2, 1) → D'(4/3, 5/3)

The attached figure show that if we draw the all these points in the coordinate plan i.e. A(1, 2), B(2, 3), C(4, 2), D(2, 1) and A'(1, 2), B'(4/3, 7/3), C'(2, 2), D'(4/3, 5/3), we can determine that Segment B'D' will be parallel to segment BD and will be shorter than segment BD.

<em>Keywords: dilation, quadrilateral, segment</em>

<em> Learn more about dilation from brainly.com/question/7569824</em>

<em> #learnwithBrainly</em>

7 0
3 years ago
What are the solutions to
statuscvo [17]
Y < 3
y < -1/3
y > -1
y < 1

7 0
4 years ago
In the number 9,999.999, how does the 9 in the tens place compare to the 9 in the place to its left. The 9 in the tens place rep
aleksley [76]

The question is not complete as the options are not correct. However, the correct answer is as follows:

Answer:

The correct answer is - the 9 in the tens place represents 1/10 times what the 9 to its left represents.

Step-by-step explanation:

Given:

Number:   9999.999

We know: The tenth value is 99<u>9</u>9.999 (in bold) and 9 to its left is underlined which is the 100th value.

Solution:

Place value of 9 on the tenth place

= 9*10= 90 ..... 1

Left place of the tenth is hundredth

Place value of 9 at the hundredth place

=9*100

=900 .... 2

comparing 1 to 2 by dividing

= 90/900

= 1/10th

6 0
3 years ago
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