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Permutations/749386: Plz some1 help me to solve this problem:
An 8 litre cylinder contains a mixture of oxygen
and nitrogen, the volume of oxygen being 16% of
the total volume. A few litres of the mixture is
released and an equal amount of nitrogen is added.
Then the same amount of the mixture as before is
released and replaced by nitrogen for the second
time. As a result, the oxygen content becomes 9% of
the total volume. How many litres of mixture is
released each time?
1 solutions
Answer 455990 by lynnlo(4155)   on 2013-05-16 11:57:05 (Show Source):
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Permutations/749388: plz help me:
Directions for Q1 to 3:
In a famous short-time game named CROSS, each player
puts a mark (O OR x) one by one inside a 3x3 grid (9 slots).
Two players face the following situation in between the
game.
A player will put his mark in a line such that:
(a) it already contains two of his own marks (for winning)
(b) it already contains two of the opponents marks (for
saving the game)
It is known that player always gives priority to Winning
over saving.
1. What could be the mark of the person who started the
game?
A) X
B) O
C) X or O
D) Data insufficient
2. The player who wins the match uses which mark?
A) X
B) O
C) X or O
D) Data insufficient
3. Probability of A (with symbol O), winning the game
if both players freely mark anywhere?
A) 0.76
B) 1
C) 0.5
D) 0.33
1 solutions
Answer 455989 by lynnlo(4155) on 2013-05-16 11:56:35 (Show Source):
You can put this solution on YOUR website!(1)C,,,,,,(2)D,,,,,,,,,(3)C
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Points-lines-and-rays/749485: rectangel QRST, side QR is parallel to x-axis and on y>0 of the quadratic funtion  . And the side ST on the y<0 of the quadratic function  . Let P be the point of intersection of the side QT and the x-axis. Let α be the length of the perimeter of this rectangle. We are to find the x-coordinate of the point P where α is maximized and also to find the maximum value of α. P(x,0)
1 solutions
Answer 455987 by lynnlo(4155) on 2013-05-16 11:52:47 (Show Source):
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Triangles/749486: consider triangle ABC, where the picture is here http://oi44.tinypic.com/xyge8.jpg
1. let  ADF be the area of the triangle ADF, then
2. when BD=4 and CF=2, then BC=(B) and x satisfies the equation
solving this equation , we have
AD = (E)
solve for A,B,C,D, and E
1 solutions
Answer 455986 by lynnlo(4155) on 2013-05-16 11:52:25 (Show Source):
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Permutations/749394: Q15 In how many ways can we distribute seven apple and six oranges among 4 children so that each children receive at least one apple?
Q16 From a group of 7 men and 6 women, five persons are to be selected to form a committee so that at least 3 men are there on the committee. In how many ways can it be done?
Q17 A committee of 7 consisting of a chairman, vice chairman, a secretary, and 4 other member is to be chosen from a class of 20 students. In how many ways can this committee be chosen?
Q18 Weave and Kline, a software development company, has received nine new user requirement regarding a new computer system. In how many ways can these new user requirements be directed to three of the company's software developers if each of the software developers has to handle three new user requirements?
Q19 A restaurant has 6 different desserts. Find the number of ways a customer can choose
a. 1 dessert
b. 2 of the desserts
Q20 Given a class of 12 girls and 10 boys
a. In how many ways can a committee of five consisting of 3 girls and 2 boys be chosen?
b. What are the possible committees of five can be chosen at random from the class, consists of three girls and two boys?
c. How many of the the possible committees of five have no boys? (i.e. consists only of girls)
1 solutions
Answer 455985 by lynnlo(4155) on 2013-05-16 11:52:06 (Show Source):
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Parallelograms/749393: two vertices of a square are (-4,3) and (3,3). what two sets of coordinates could form the other vertices? A)(-4,8) and (3,8) B)(-4,-4) and (3,-4)
C)(4,8) and (-3,8) D)(-4,4) and (4,-4)
1 solutions
Answer 455983 by lynnlo(4155) on 2013-05-16 11:50:00 (Show Source):
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Problems-with-consecutive-odd-even-integers/749395: Determine whether the given value is a statistic or a parameter
In a study of all 1156 professors at a college it is found that 25% own a computer
choose the correct statement
A. Parameter because the value is a numerical measurement describing a characteristic of a sample
B. Statistic because the value is a numerical measurement describing a characteristic of a population.
C. Statistic because the value is a numerical measurement describing a characteristic of a sample
D. Parameter because the value is a numerical measurement describing a characteristic of a population.
I think its C Am I right
1 solutions
Answer 455981 by lynnlo(4155) on 2013-05-16 11:49:39 (Show Source):
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test/749396: The digram at the right shows a planned open space inside a large recreational area. The space consisits of five congruent squares lyring along the sides of a regular pentaon. Suppose a city council has budgeted $427500 to landscape the area with sod and put a wooden fence aroound it. A park technician finds that the sod costs $25 per square foot and fenciing cost $10 per foot. If the technician is to stay within the budgets, how long can each side of the space be?
Using geometry the technician finds that the area is 6.72s and the perimeter is 15s. Thus the cost of sod and fencing will be 25(6.72s)+168s(squared) +150s.
Use he quadratic formula to find the postive solution...................................................................
QUESTION
Is it possible to plan an open space whose sides are more than 60 feet long on a budget of $516,450? Explain.
I would love someone who is nice to help!! Thanks! ;)
1 solutions
Answer 455980 by lynnlo(4155) on 2013-05-16 11:48:53 (Show Source):
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Problems-with-consecutive-odd-even-integers/749397: Please some one help me with this
Determine whether the value is from a discrete or continuous data set
Numbers of members present at a meeting is 6
Discrete
Continuous
In a poll of 1310 surveyed adults said that second hand smoke is quite annoying What is the actual number of adults who said that secon hand smoke is quite annoying ?
B.Among 1310 surveyed adults 675 said that second hand smoke is not at all annoying What is the percentage of the people who chose not at all annoying?
what is the actual number of adults who said that second hand smoke is quite annoying round your answer
1 solutions
Answer 455978 by lynnlo(4155) on 2013-05-16 11:48:18 (Show Source):
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Problems-with-consecutive-odd-even-integers/749400: Determine whether the given description corresponds to an observational study or an experiment
In a study of 365 students with a particular disease the subjects drank herbal mixtures to determine if the mixtures have an effect on the disease.
Does the given description correspond to an observational study or an experiment
A. The given description corresponds to an observational study
B. The given description corresponds to an experiment
C.The given description does not provide enough information to answer
1 solutions
Answer 455977 by lynnlo(4155) on 2013-05-16 11:48:02 (Show Source):
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Finance/749403: You borrow from JKL Bank 10,000.00 dollars for 100 months at 2.25% simple interest rate.
Question 01: How much interest will you pay on this loan and what is the total amount you will give to JKL Bank?
Question 02: If you agreed to make monthly payments for the duration of the loan, compute the amount of each payment.
Question 03: Compute what part of each monthly payment goes towards paying the capital and what part goes to interest payments.
1 solutions
Answer 455975 by lynnlo(4155) on 2013-05-16 11:47:29 (Show Source):
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Problems-with-consecutive-odd-even-integers/749416: Statistics students participated in an experiment to test their ability to determine when 1 minute has passed. The results are given below in seconds Find the range variance and standard deviation for the given sample data. Identify one reason why the standard deviation from this sample might not be a good estimate of the standard deviation population of adults
50 53 61 66 56
range= sec
A particular group of men have heights with the mean of 180cm and a standard deviation 6cm Jordon has a height of 188cm
A. What is the positive difference between jordans height and the mean
B. How many standard deviations is that (the difference found in parta)
C.Convert Jordans height to a z score
D. if we consider usual heights to be those that convert to z scores between -2and 2 is Jordans height usual or unusual?
A. The positive difference difference between Jordans height and the mean is cm?
1 solutions
Answer 455974 by lynnlo(4155) on 2013-05-16 11:46:50 (Show Source):
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Surface-area/749407: a peice of art is in the shape of an equilateral triangle with sides pf 13 in. find the area of a peice of art. round it to the nearest tenth
1 solutions
Answer 455972 by lynnlo(4155) on 2013-05-16 11:46:29 (Show Source):
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Problems-with-consecutive-odd-even-integers/749415: Please help me with theses
Identify which type of sampling is used random systematic convenience stratified or cluster
A radio station asks its listeners to call in their opinion regarding the use of pesticides in residential areas ?
I say its cluster
Given that the dictionary has 1,476 pages with defined words estimated the total number of defined words in the dictionary Is the estimate likely to be an accurate estimate of the number of words in the English language?
46 61 37 38 39 67 78 35 52 84 i got an answer of 53.7
Statistics are sometimes used to compare or identify authors of different works. The length of the first words in a book by Terry are listed with the first 10 words in a book by David. Find the median for each of the two then compare the results
the mean number of letters per word in Terry book is?
1 solutions
Answer 455970 by lynnlo(4155) on 2013-05-16 11:45:45 (Show Source):
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Probability-and-statistics/749413: suppose a basket contains 100 red balls and 50 white balls, if two balls are drawn one after the other without replacement at random. what is the probability that they will both of the same colour
1 solutions
Answer 455959 by lynnlo(4155) on 2013-05-16 11:33:30 (Show Source):
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test/749466: How exactly do I solve this? I've looked in my book and it doesn't show this anywhere. Based on the diagram solve for x,y,z. Thank you for any help!
Here's the link to the diagram:
http://imageshack.us/a/img824/7463/imag44431.jpg
1 solutions
Answer 455954 by lynnlo(4155) on 2013-05-16 11:13:58 (Show Source):
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Probability-and-statistics/748189: A survey was conducted to determine the percentage of students at a post secondary institution who prefer the new alpha-grading system. The responses from a random sample of 30 students are shown below.
YES-18, NO-12
Construct a 98.5% confidence interval for a population proportion who prefer the new alpha-grading system.
1 solutions
Answer 455391 by lynnlo(4155) on 2013-05-13 14:54:19 (Show Source):
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Probability-and-statistics/748179: Grade point averages of math majors at a large distance education university are normally distributed with a mean of u= 2.85 and a standard deviation of σ=0.30. If a random sample of 25 math majors is selected from that university, what is the probability that the sample mean grade point averages will be
a) either less than 2.709 or more then 2.955?
b) at least 2.757?
1 solutions
Answer 455390 by lynnlo(4155) on 2013-05-13 14:53:56 (Show Source):
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Inequalities/748188: consider two condition  and |x-2|<α on a real number x, where a is a positive real number
i. the range of values of α such that |x-2|<α is a necessary condition for  is ???
2. the range of values α such that |x-2|<α is a sufficient condition for is ???
1 solutions
Answer 455389 by lynnlo(4155) on 2013-05-13 14:53:35 (Show Source):
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Probability-and-statistics/748187: A survey is being planned to estimate, with a 98% confidence interval, the mean amount of time per week that seniors spend watching television. The population standard deviation is known to be 5.2 hours. What sample size will be required to obtain an estimate that is within 0.5 hours of the population mean?
1 solutions
Answer 455387 by lynnlo(4155) on 2013-05-13 14:51:15 (Show Source):
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Probability-and-statistics/748182: Psychologists estimate that 80% of male drivers, when lost in trying to find a location, continue to drive rather than asking for directions. If this estimate is correct, what is the probability that, in a random sample of 100 lost male drivers, the proportion who continue to drive is
a) at least 0.70?
b) less than 0.85?
1 solutions
Answer 455386 by lynnlo(4155) on 2013-05-13 14:50:52 (Show Source):
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