What size bag of fertilizer should the jamisons buy?

utomobiles arrive at the drive-through window at a post office at the rate of 7 every 10 minutes. The average service time is 7

Arlecino [84]

Answer:

The answers to the questions are well numbered below.

Step-by-step explanation:

We have arrival rate

λ = 7 in every 10 minutes = 0.7

Service time u = 7 minutes

1. Average time a car is in system

W = 1/u - λ

= 1/7-0.7

= 0.1587

= 0.16 to 2 decimal places

2. Average number of cars in system

= λ/u-λ

= 0.7/7-0.7

= 0.1111

= 0.11 to 2 decimal places

3. Average time that cars spend to receive service

= λ/u(u-λ)

= 0.7/7(7-0.7)

= 0.01587

= 0.016 to 2 decimal places

4. Average number of cars in line behind customer receiving service

= λ²/u(u-λ)

= 0.7²/7(7-0.7)

= 0.49/44.1

= 0.011 to 2 decimal places

5. Probability no cats at window

1-λ/u

= 1-0.7/7

= 0.9 = 9%

6. Percentage of time postal clerk is busy

= λ/u = 0.7/7 = 0.1 = 10%

7. Probability of exactly 2 cars

= λ²e^-λ/2!

= 0.7²e^-0.7/2!

= 0.1217

= 12.17%

8 0

3 years ago

Consider a paint-drying situation in which drying time for a test specimen is normally distributed with s = 6. The hypotheses H0

adell [148]

Answer:

There is no statistical evidence to support the claim that the mean is elss than 74.

Step-by-step explanation:

Given that a paint-drying situation in which drying time for a test specimen is normally distributed with s = 6.

The hypotheses H0: µ = 74 and Ha: µ < 74

are to be tested using a random sample of n = 25 observations

a) Z = $\frac{72.3-74}{\frac{6}{\sqrt{25} } } \\=-1.417$

ie. -1.417 std deviations to the left of mean.

b) p value = 0.078241

Since p > 0.01 , our alpha, accept H0

There is no statistical evidence to support the claim that the mean is elss than 74.

6 0

4 years ago

What is an equation of the line that passes through the points (2,1) and (6,-5)?

slava [35]

I would go with number 3.

6 0

4 years ago

Mrs. Hissy is painting all of the walls, the floor and ceiling in her garage. Her garage is in the shape of a rectangular prism.

den301095 [7]

Answer:

3100 ft²

Step-by-step explanation:

20*40*12.5

In this rectangular prism, there are two walls with surface area 20*40=800 ft², two walls with surface area 40*12.5=500 ft², and two walls with surface area 20*12.5=250 ft². Multiplying and adding it all together, you get 3100 ft². Hope this helps!

5 0

3 years ago

Please help me...I don't get it-

DaniilM [7]

Answer:

1. It would be the second block. Bill reads 3 books EACH week. I know you’re looking for that X to be 1 but if you look 3 books x 5 weeks = 15 books and so on.

2. It would be the first block. Exactly on 6 weeks he reads 6 books meaning that by week 3 (which is half) he would have read haof the books (2). And same for week 12 you and another 4 which gets you 8 books.

3. It’s the last block. On week 12 he read 4 books. Half of 12 is 6 so it would be half books and week 3 is half of that which is 1 book per 3 weeks.

4. Is the third block. (Process of elimination lol) but also easily you can find the rate of each week by dividing the 15 books by 10 weeks which gets you 1.5 books read per week

5 0

3 years ago

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