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raketka [301]
3 years ago
7

A subway train on the Red Line arrives every eight minutes during rush hour. We are interested in the length of time a commuter

must wait for a train to arrive. The time follows a uniform distribution.
a. Define the random variable. X= _______
b. X∼ _______
c. Graph the probability distribution.
d. f(x)= _______
e. μ= _______
f. σ= _______
g. Find the probability that the commuter waits less than one minute.
h. Find the probability that the commuter waits between three and four minutes.
i. Sixty percent of commuters wait more than how long for the train? State this in a probability question, similarly to parts g and h, draw the picture, and find the probability.
Mathematics
1 answer:
olasank [31]3 years ago
5 0

Answer:c i just did the test

Step-by-step explanation:

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What’s the answer to this question? I’m confused as to how to do this.
choli [55]

Answer:

x = 20

Step-by-step explanation:

(3x + 50) = (6x - 10)

Subtract 6x on each side

3x + 50 - 6x = -10

Combine the x values together

-3x + 50 = -10

Subtract 50 on each side

-3x = -60

Divide each side by -3

x = 20

8 0
3 years ago
On a coordinate plane, what is the difference between (-2,7) and (-2,-6)?
Shtirlitz [24]
If you mean distance, then we can use the distance formula to find out.

(x - x)² + (y - y)² = d²   Distance formula
(-2 + 2)² + (7 + 6)² = d²   Substitute the points; remember that when you subtract a negative, you add, and also remember to always subtract in the same direction (with the points (1,2) and (3,4), if you do 1 - 3, then do 2 - 4 and not 4 - 2)
(0)² + (13)² = d²   Add
0 + 169 = d²   Square
169 = d²   Add
13 = d   Take the square root of both sides to cancel out the exponent

The distance between (-2,7) and (-2,-6) is 13 units.

Hope this helps!
4 0
3 years ago
A customer service survey was conducted of 500 customers: 250 men and 250 women. The data on one of the questions show that 175
Lisa [10]

Answer:

1,335

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
The sales totals at Macy's food store have increased exponentially over the months. Which of these best shows the sales in the f
Tpy6a [65]

An exponential or geometric function can be expressed as a power of t, where t is time.  

This means that if you can fit all three values into the formula  

S = S0 * (1+r)^t  

for a constant r, and t=1, 2, 3 (or 0, 1, 2 for simplicity), then it's exponential.  

You can see right away that the first and second sets of numbers are not exponential. These are linear, because each month is a fixed value greater than the previous one.  

If you look at the formula above, you can see that each successive time interval's growth can be calculated by multiplying a fixed value to the previous intervals. For example, the second month is given by:  

S(1) = S0 * (1+r)  

S(2) = S0 * (1+r)^2 = S0 * (1+r) * (1+r) = S(1) * (1+r)  

Since each month's sales is 102% the previous month's in the fourth set, this is the one you want.

3 0
3 years ago
Read 2 more answers
What is the answer when you evaluate m + p - p2 ÷ 6; use m = 5 and p = 6 ?
Tanya [424]

Answer:

5

Step-by-step explanation:

m + p - p^2 ÷ 6

Let m = 5 and p=6

5 + 6 - 6^2 ÷ 6

Exponents first

5 + 6 - 36 ÷ 6

Then divide

5 + 6 - 6

Then add and subtract from left to right

11-6

5

3 0
3 years ago
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