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ivolga24 [154]
2 years ago
15

The Doppler effect is an effect produced by a moving source of sound or electromagnetic waves due to the relative motion of a so

urce or a receiver. If an emergency vehicle approaches Bob and moves away from Jill, how does the frequency of the siren change?
A) Neither Bob or Jill perceive any change in the frequency of the siren.
B) As an emergency vehicle approaches Bob the frequency appears to increase.
C) As an emergency vehicle moves away from Jill the frequency appears to increase.
D) Bob does not notice any change until the vehicle passes him and the siren increases.
Mathematics
1 answer:
IgorC [24]2 years ago
4 0

Answer:

b

Step-by-step explanation:

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Write-2.16 as a fraction asap!!!!1m
Anarel [89]

Answer:

-2 wholes 4/25

Step-by-step explanation:

I used calculator. btw its -2 4/25

hope this helps! mark as brainliest!

8 0
2 years ago
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- Find the mean, median, mode, and range of the<br> data set.<br> {7, 3, 5, 4, 5}
noname [10]

Answer:

The range is 2

Step-by-step explanation:

The median is 5. The mode is 5. The mean is 5.

6 0
2 years ago
What are the zeros of y=x^2 +2x -8
Igoryamba
Y = x² + 2x - 8

which two numbers add up to 2 and multiply to -8?

-2 and 4

so rewrite the expression using the above;

(x - 2)(x + 4)
x = 2, -4

so the zeros are 2 and -4.

hope this helps, God bless!
6 0
2 years ago
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Answer the two questions below. Show ALL of your work.
Yuliya22 [10]

Answer A: 84π

Answer B: I'm also confused. If anyone else knows can you please help me also. Sorry for not answering B. I hope this helps though.

Step-by-step explanation:

Answer A:

V=1/3π 6^2 (7) Since 12 is a diameter you half it which is 6

V=1/3π 36(7)

V=1/3π 252

V= 252π/3

V=84π

3 0
2 years ago
The daily exchange rates for the​ five-year period 2003 to 2008 between currency A and currency B are well modeled by a normal d
ale4655 [162]

Answer:

50% probability that on a randomly selected day during this​ period, a unit of currency B was worth more than 1.094 units of currency​ A.

Step-by-step explanation:

The Empirical Rule(68-95-99.7 rule) states that, for a normally distributed random variable:

68% of the measures are within 1 standard deviation of the mean.

95% of the measures are within 2 standard deviation of the mean.

99.7% of the measures are within 3 standard deviations of the mean.

In this problem, we have that:

Mean = 1.094

Standard deviation = 0.013

a) What is the probability that on a randomly selected day during this​ period, a unit of currency B was worth more than 1.094 units of currency​ A?

The normal distribution is symmetric, which means that 50% of the units of currency B are more than 1.094 of currency A and 50% are below.

So

50% probability that on a randomly selected day during this​ period, a unit of currency B was worth more than 1.094 units of currency​ A.

5 0
3 years ago
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