1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Alja [10]
3 years ago
8

Please Help me! Marvin worked for 3 days. He earned $87.20 each day. He uses his earnings to buy four chairs. If he has no money

left over, what is the cost of each chair?
$65.40
$261.60
$116.27
$21.80
Mathematics
2 answers:
Molodets [167]3 years ago
5 0

Answer:

21.8

Step-by-step explanation:

87.2 divided by 4

musickatia [10]3 years ago
3 0

Answer:

261.60

Step-by-step explanation:

its 3 times 87.20

You might be interested in
So are you good at maths then what is
quester [9]

maybe 28 is the answer...

4 0
3 years ago
Read 2 more answers
in justin's school,0.825 of students participate in a sport. if there are one thousand students in justin's school, how many pat
goblinko [34]
175 because 1,000-825=175
7 0
3 years ago
The amount of coffee that a filling machine puts into an 8-ounce jar is normally distributed with a mean of 8.2 ounces and a sta
nordsb [41]

Answer:

73.30% probability that the sampling error made in estimating the mean amount of coffee for all 8-ounce jars by the mean of a random sample of 100 jars will be at most 0.02 ounce

Step-by-step explanation:

To solve this question, we need to understand the normal probability distribution and the central limit theorem.

Normal probability distribution

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

Central Limit Theorem

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean \mu and standard deviation \sigma, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}.

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

In this problem, we have that:

\mu = 8.2, \sigma = 0.18, n = 100, s = \frac{0.18}{\sqrt{100}} = 0.018

What is the probability that the sampling error made in estimating the mean amount of coffee for all 8-ounce jars by the mean of a random sample of 100 jars will be at most 0.02 ounce?

This is the pvalue of Z when X = 8.2 + 0.02 = 8.22 subtracted by the pvalue of Z when X = 8.2 - 0.02 = 8.18. So

X = 8.22

Z = \frac{X - \mu}{\sigma}

By the Central Limit Theorem

Z = \frac{X - \mu}{s}

Z = \frac{8.22 - 8.2}{0.018}

Z = 1.11

Z = 1.11 has a pvalue of 0.8665

X = 8.18

Z = \frac{X - \mu}{s}

Z = \frac{8.18 - 8.2}{0.018}

Z = -1.11

Z = -1.11 has a pvalue of 0.1335

0.8665 - 0.1335 = 0.7330

73.30% probability that the sampling error made in estimating the mean amount of coffee for all 8-ounce jars by the mean of a random sample of 100 jars will be at most 0.02 ounce

8 0
3 years ago
How many inches are in 7 yards
Phoenix [80]
Hey there! There are approximately 252 inches in 7 yards! Take care!
4 0
3 years ago
Read 2 more answers
Which is 1.4 written as a decimal in thousandths
Hunter-Best [27]
1.4 in thousands is 1.400
6 0
3 years ago
Other questions:
  • What is the scientific notation for 140000
    13·1 answer
  • Which of the following equals the difference between the total surface area and base area of any three-dimensional figure?
    10·2 answers
  • Which of the following best describes the expression 4(y + 6)?
    10·1 answer
  • Two studies were completed in Georgia. One study in northern Georgia involved 3,000 patients; 84% of them experienced flulike sy
    15·1 answer
  • Please give me the answer to this it's due at 8:00​
    12·2 answers
  • What are the coordinates of the x-intercept for the line that goes through points (3, 2) and (3, 6) ?
    11·1 answer
  • While working at his neighborhood math tutoring center researching the comprehension level of the students Dion investigated tha
    8·1 answer
  • Is $5.40 the same as $7.00?
    14·1 answer
  • What is 3\times2 \dfrac{2}{3}3×2 3 2 ​ 3, times, 2, start fraction, 2, divided by, 3, end fraction? Choose 2 answers: Choose 2 a
    9·2 answers
  • Avary wanted to buy a gold necklace that cost $578. She pain an initial amount of $128 and agreed to pay the rest in monthly ins
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!