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julia-pushkina [17]
3 years ago
9

Answers because I need help

Mathematics
2 answers:
Katen [24]3 years ago
7 0

The first one is the correct answer

kramer3 years ago
6 0

Answer:

f(x)

Step-by-step explanation:

the function f(x) crosses the y-axis higher than either of the other functions, therefore it has the largest y-intercept

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Add an intersection the red light times normally distributed by the mean of three minutes and a standard deviation of .25 minute
Soloha48 [4]

95% of red lights last between 2.5 and 3.5 minutes.

<u>Step-by-step explanation:</u>

In this case,

  • The mean M is 3 and
  • The standard deviation SD is given as 0.25

Assume the bell shaped graph of normal distribution,

The center of the graph is mean which is 3 minutes.

We move one space to the right side of mean ⇒ M + SD

⇒ 3+0.25 = 3.25 minutes.

Again we move one more space to the right of mean ⇒ M + 2SD

⇒ 3 + (0.25×2) = 3.5 minutes.

Similarly,

Move one space to the left side of mean ⇒ M - SD

⇒ 3-0.25 = 2.75 minutes.

Again we move one more space to the left of mean ⇒ M - 2SD

⇒ 3 - (0.25×2) =2.5 minutes.

The questions asks to approximately what percent of red lights last between 2.5 and 3.5 minutes.

Notice 2.5 and 3.5 fall within 2 standard deviations, and that 95% of the data is within 2 standard deviations. (Refer to bell-shaped graph)

Therefore, the percent of  red lights that last between 2.5 and 3.5 minutes is 95%

8 0
3 years ago
Which of the following is the ratio of boys to girls in tamir's math class?
WARRIOR [948]
The answer for your question is 12/15
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Write an equation that models the sequence 200, 500, 1250
Vsevolod [243]

Answer:

1200

Step-by-step explanation:500-200=300

1250-500=750

750-300=450

750+450=1200

5 0
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How to solve<br><br> X<br> ___ -2=9<br> 2
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6 0
3 years ago
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