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MAVERICK [17]
2 years ago
8

Help me PLEASEEEEEEEEEEEEE

Mathematics
1 answer:
steposvetlana [31]2 years ago
4 0

Answer: d

Step-by-step explanation:

its d

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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
2 years ago
What is the equation of a line whose slope is 2 and passes through the point (-6,9)
yuradex [85]

Answer:

y = 2x + 21

Step-by-step explanation:

Step 1: Write out known variables

y = mx + b

m = 2

y = 2x + b

Step 2: Find <em>b</em>

9 = 2(-6) + b

9 = -12 + b

b = 21

Step 3: Rewrite linear equation

y = 2x + 21

7 0
2 years ago
The area of a sector of a circle is given by the equation uppercase A = StartFraction pi r squared uppercase S Over 360 EndFract
andreyandreev [35.5K]

Answer:360A/pi ^2

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
.......................help pls<br><br><br><br><br>​
Vinvika [58]

Answer:

The first one is incorrect

Step-by-step explanation:

3^2 - 5 + 2

9 - 5 + 2

4+2 = 6 (not 42)

4 0
3 years ago
Read 2 more answers
Profit is the difference between revenue and cost. The revenue, in dollars, of a company that manufactures televisions can be mo
Marrrta [24]
3x^2 + 180x - (3x^2 - 160x + 300) = profit
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340x - 300 = profit

so if 150 televisions are sold...x = 150
340(150) - 300 =
50,700 <==

4 0
3 years ago
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