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3 years ago

Help please

Mathematics

1 answer:

Ratling [72]3 years ago

7 0

Answer:

B 12√7

Step-by-step explanation:

please mark brainliest! hope it helped!

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Let x be the amount of time (in minutes) that a particular San Francisco commuter must wait for a BART train. Suppose that the d

larisa [96]

Answer:

a) $P(X$

$P(X>14) = 1-P(X$

b) $P(7< X$

c) We want to find a value c who satisfy this condition:

$P(x$

And using the cumulative distribution function we have this:

$P(x$

And solving for c we got:

$c = 20*0.9 = 18$

Step-by-step explanation:

For this case we define the random variable X as he amount of time (in minutes) that a particular San Francisco commuter must wait for a BART train, and we know that the distribution for X is given by:

$X \sim Unif (a=0, b =20)$

Part a

We want this probability:

$P(X$

And for this case we can use the cumulative distribution function given by:

$F(x) = \frac{x-a}{b-a} = \frac{x-0}{20-0}= \frac{x}{20}$

And using the cumulative distribution function we got:

$P(X$

For the probability $P(X>14)$ if we use the cumulative distribution function and the complement rule we got:

$P(X>14) = 1-P(X$

Part b

We want this probability:

$P(7< X$

And using the cdf we got:

$P(7< X$

Part c

We want to find a value c who satisfy this condition:

$P(x$

And using the cumulative distribution function we have this:

$P(x$

And solving for c we got:

$c = 20*0.9 = 18$

3 0

3 years ago

RED YOU ARE VERY SUS

Allisa [31]

Answer:

YES YES HE VENTED ITS NOT ME DONT WORRY

7 0

3 years ago

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John had $500<br> Anna has $400<br> Peter had $700<br> Who has the most?

vladimir2022 [97]

Answer:

Peter has the most

Step-by-step explanation:

Peter has the most amount of the money of the three of them.

From the question, we see that John had only $500 while Anna has $400 and Peter had $700. Which means, of all the three of them; John, Anna and Peter, Peter had the most because he had $700 the greatest amount of the three of them, which is followed by John who had $500, the greater and Anna had the least of it, $400.

Arranging from the Person who had the most of money, we have Peter with $700, John with $500 and lastly, Anna with $400.

8 0

4 years ago

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What is the slope of the line that is perpendicular to the line whose equation is 2x + y = 4.

weqwewe [10]

Peprendicular lines have slopes that multiply to get -1

y=mx+b
m=slope

2x+y=4
minus 2x
y=-2x+4
slope is -2

-2 times what=-1
what=-1/-2
what=1/2

the slope is 1/2

6 0

3 years ago

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Find the value of x. A. 35 B. 40 C. 45 D. 50

geniusboy [140]

Answer:

Step-by-step explanation:

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