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3 years ago

6

Napkins come in a variety of packages. A package of 40 napkins sells for $4.59, and a package of 10 napkins sells for $2.30. Fin

d the unit cost of each package. Which is the better buy? (Round to four decimal places as necessary.)

1 answer:

Ilia_Sergeevich [38]3 years ago

3 0

Answer:

for the 40 package unit cost is $0.1148

In 10 pack the unite price would be $0.2300

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he amount of time that a customer spends waiting at an airport check-in counter is a random variable with mean 8.3 minutes and s

sp2606 [1]

Complete question:

He amount of time that a customer spends waiting at an airport check-in counter is a random variable with mean 8.3 minutes and standard deviation 1.4 minutes. Suppose that a random sample of n equals 47 customers is observed. Find the probability that the average time waiting in line for these customers is

a) less than 8 minutes

b) between 8 and 9 minutes

c) less than 7.5 minutes

Answer:

a) 0.0708

b) 0.9291

c) 0.0000

Step-by-step explanation:

Given:

n = 47

u = 8.3 mins

s.d = 1.4 mins

a) Less than 8 minutes:

$P(X$

P(X' < 8) = P(Z< - 1.47)

Using the normal distribution table:

NORMSDIST(-1.47)

= 0.0708

b) between 8 and 9 minutes:

P(8< X' <9) = $[\frac{8-8.3}{1.4/ \sqrt{47}}< \frac{X'-u}{s.d/ \sqrt{n}} < \frac{9-8.3}{1.4/ \sqrt{47}}]$

= P(-1.47 <Z< 6.366)

= P( Z< 6.366) - P(Z< -1.47)

Using normal distribution table,

$NORMSDIST(6.366)-NORMSDIST(-1.47)$

0.9999 - 0.0708

= 0.9291

c) Less than 7.5 minutes:

P(X'<7.5) = $P [Z< \frac{7.5-8.3}{1.4/ \sqrt{47}}]$

P(X' < 7.5) = P(Z< -3.92)

NORMSDIST (-3.92)

= 0.0000

3 0

2 years ago

Where could point E be if and D is between E and B?

Artemon [7]

Answer:

It would be to the left of the whole equation.

Step-by-step explanation:

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3 years ago

The price of Stock A at 9 A.M. was $14.65. Since then, the price has been increasing at the rate of $0.13 each hour. At noon

Nataly [62]

Answer:

The prices of the two stocks will be the same in 1.56 hours.

The price of Stock A at 9 A.M. was $12.95 Since then, the price has been increasing at the rate of $0.12 each hour.

This means that after x hours, the value of Stock A is:

After noon:

Noon is 3 hours after 9 AM, so

So in x hours after noon, the value is given by:

At noon the price of Stock B was $13.70. It begins to decrease at the rate of $0.13 each hour.

This means that after x hours, the value of Stock B is:

In how many hours will the prices of the two stocks be the same?

This is x for which:

The prices of the two stocks will be the same in 1.56 hours.

Step-by-step explanation:

Hope this helps:)

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2 years ago

Read 2 more answers

A high school band is selling tickets to its concert. The ticket prices are shown below

mamaluj [8]

Isisisisjssjsjsnsjsisisi This is 40

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1 year ago

Rudy invested $2460 in a money market account for 3 and 1/2 years. He earned $452 in simple interest. Which best represents the

antiseptic1488 [7]

Answer:

B. 5 and 1/4 percent

Step-by-step explanation:

Step one:

given

principal= $2460

time= 3 and 1/2 years= 3.5 years

SI= $452

Required

The rate

Step two:

we know that

SI= PRT/100

substituting our data we have

452= 2460*R*3.5/100

452=8610R/100

cross multiply

452*100= 8610R

divide both sides by 8610

45200/8610= R

R= 5.25%

R= 5 and 1/4 percent

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2 years ago