Tutors Answer Your Questions about Miscellaneous Word Problems (FREE)
Question 1187042: 11-22
Sales of industrial vacuum cleaners at Overholt Supply Co. over the past 13 months were as follows:
Sales
Sales
Month
(thousands)
Month
(thousands)
January
9
August
12
February
12
September
15
March
14
October
10
April
8
November
12
May
13
December
14
June
15
January
9
July
9
a. Using a moving average with three periods, determine the demand for vacuum cleaners for next February.
b. Using a three-period weighted moving average with weights 3, 2, and 1 (3= most recent) determine the demand for vacuum cleaners for February.
c. Evaluate and comment on the accuracy of each of these models.
11-26
Commuter ridership in Athens, Greece, during the summer months is believed to be heavily tied to the number of tourists visiting the city. During the past 12 years, the data in the table below have been obtained.
Number of Tourists
Ridership
Year
(millions)
(Hundreds of thousands)
1
11
14
2
6
9
3
10
12
4
8
14
5
18
24
6
19
26
7
20
23
8
16
19
9
18
26
10
24
43
11
19
33
12
11
16
a. First, analyze Ridership data as Time Series Data, and use trend analysis to forecast ridership in years 13, 14, and 15. Does the model fit the data well? Why or why not? (Hint: Since this is time-series data, treat time as X and Ridership as Y in your trend analysis.)
b. Now analyze the relationship between # of Tourists and Ridership. Draw the relationship between the number of tourists and ridership in a scatterplot. Is a linear model reasonable? Why or why not?
c. Develop a linear regression relationship between the number of tourists and ridership.
d. What is the expected ridership if 10 million tourists visit the city next year?
Click here to see answer by Alan3354(69443)   |
Question 1189190: Hi
15 girls and a number of boys collected an average of 28 stamps. The girls collected an average of 20 stamps. If each boy collected an average of 14 more stamps than each girl how many children were there.
Thanks
Click here to see answer by Theo(13342)  |
Question 1189191: Rex is a carnivorous dinosaur who lives on an island that is also inhabited by people. He eats one fourth of the people on his island on Monday, 13 of them on Tuesday, and half as many as he ate on Monday on Wednesday. If there are 22 people left on the island on Thursday, and nobody came to the island or left in a way other than being eaten in that time period, how many people were on the island before Rex's rampage?
Click here to see answer by josgarithmetic(39616) |
Question 1187017: To produce a textbook, suppose a publisher spent $125,000 for typesetting and $4.50 per book for printing and binding. The total cost to produce n books can be written as
C = 125,000 + 4.5n
a. Suppose the number of books printed in the first printing is 10,000. What is the total cost?
The total cost is:
b. If the average cost is the total cost divided by the number of books printed, find the average cost of producing 10,000 textbooks.
The average cost for producing 10,000 textbooks is:
c. Find the cost to produce one more textbook when you have already produced 10,000 textbooks. If you have already produced 10,000 textbooks, it’ll cost you “” to produce one more.
Thank you!
Click here to see answer by Boreal(15235)  |
Question 1189236: Soil contains a wide variety of nutrients, including nitrogen, phosphorus, potassium, magnesium, sulfur, and iron. A fertilizer company conducted an experimental study to determine which of five additives is most effective in helping soil retain nutrients. If, after application of the additives, the fertilizer company tested only for the soil nutrients nitrogen and potassium, which of the following is a valid conclusion?
1. The additive that is found to be the most effective will work for all nutrients in the soil.
2. The additive that is found to be the most effective will work only for nitrogen and potassium.
3. The study is biased and therefore not significantly relevant to determining which additive is most effective.
4. The study will be able to produce results concerning only the effects of the additives on nitrogen and potassium.
Click here to see answer by ikleyn(52775)  |
Question 1189241: In a school of 970 students, all of them voted on two issues. 390 students voted in favour of banning cell phones, and 930 students voted in favour of having a school dance. Just 20 students voted against both issues. How many students voted in favour of both proposals
Click here to see answer by ikleyn(52775) |
Question 1189297: Hi
Stephen and Siew mei had $540 altogether. Stephen gave 1/7 of his money siew mei. In return siew mei gave 1/4 of the total amount she had to Stephen . Then they both had the same amount of money. How much did Stephen had at first.
Thanks
Click here to see answer by ikleyn(52775) |
Question 1189297: Hi
Stephen and Siew mei had $540 altogether. Stephen gave 1/7 of his money siew mei. In return siew mei gave 1/4 of the total amount she had to Stephen . Then they both had the same amount of money. How much did Stephen had at first.
Thanks
Click here to see answer by greenestamps(13198)  |
Question 1189351: A spherical shot has diameter of 1/8 in.
Determine:
1)Volume of shot.
2)Number of shot made from 1 cu. in. of material.
Check my calculations, please.
Volume of sphere: 4/3 * pi * r^3
1) 1.333 * 3.1416 * 0.0625 * 0.0625 * 0.0625 = .001022400 cu. in.
2) 1 / .001022400 = 978.09 = 978 shot.
Click here to see answer by ikleyn(52775) |
Question 1189402: Machine A can do a job alone in 10 hours. Machine B can do the same job alone in 12 hours. Machine A is turned on at 6am Machine B is turned on at 9 a.m. Machine A breaks down at 10 a.m., and Machine B must finish the job alone. When will Machine B finish?
Click here to see answer by Boreal(15235) |
Question 1189402: Machine A can do a job alone in 10 hours. Machine B can do the same job alone in 12 hours. Machine A is turned on at 6am Machine B is turned on at 9 a.m. Machine A breaks down at 10 a.m., and Machine B must finish the job alone. When will Machine B finish?
Click here to see answer by ikleyn(52775) |
Question 1189402: Machine A can do a job alone in 10 hours. Machine B can do the same job alone in 12 hours. Machine A is turned on at 6am Machine B is turned on at 9 a.m. Machine A breaks down at 10 a.m., and Machine B must finish the job alone. When will Machine B finish?
Click here to see answer by math_tutor2020(3816) |
Question 1189426: Jason bought a painting with a 1 inch wide frame. If the dimensions of the outside of the frame are 5 inches by 7 inches, which of the following could be the length of one of the sides of the painting inside the frame?
Click here to see answer by ikleyn(52775) |
Question 1189446: Jonah’s parents own Smitty’s Fish Market off the Hilo Pier. They sell fresh fish to all the local restaurants in town. Their supply varies each day based on what they’ve caught that morning. On Friday, his parents caught and sold 130 pounds of tuna and 65 pounds of Ono. On Saturday they caught and sold twice as much tuna but only half as much Ono. How many pounds of fish did they sell in all on Friday and Saturday?
Click here to see answer by josgarithmetic(39616) |
Question 1189509: A softball player throws a ball into the air at an initial velocity of 44 feet per second. The player’s hand is 5 feet from the ground at the time the ball is released.
Use the formula −16t2 + vt + c = 0.
t = time in seconds the ball is in the air
v = initial velocity in feet per second
c = the initial distance from the ground
h = the distance above the ground in feet
Q. How many seconds will the ball stay in the air? Round your answer to the nearest hundredth second.
a. 1.09
b. 1.59
c. 1.82
d. 2.86
Click here to see answer by Alan3354(69443) |
Question 1189523: In an experiment using Joule's apparatus, a mass of 6.00 kg falls 50.0 m and rotates a paddle wheel stirring 0.600 kg of water. The water is initially at 20.0 degrees Celsius. What is its final temperature?
Click here to see answer by ikleyn(52775) |
Question 1189607: Ashley had 24 math problems for her homework. Her father made the following deal with her. He said "I'll give you $5 for every problem you got right, but you pay me $3 for every problem you got wrong." If Ashley broke even on this deal, how many problems did she get correct? Write an equation to solve the problem.
Click here to see answer by Theo(13342) |
Question 1189607: Ashley had 24 math problems for her homework. Her father made the following deal with her. He said "I'll give you $5 for every problem you got right, but you pay me $3 for every problem you got wrong." If Ashley broke even on this deal, how many problems did she get correct? Write an equation to solve the problem.
Click here to see answer by ankor@dixie-net.com(22740)  |
Question 1189607: Ashley had 24 math problems for her homework. Her father made the following deal with her. He said "I'll give you $5 for every problem you got right, but you pay me $3 for every problem you got wrong." If Ashley broke even on this deal, how many problems did she get correct? Write an equation to solve the problem.
Click here to see answer by ikleyn(52775) |
Question 1189681: Matt the Magician had 4 times as many black balloons as purple balloons. After he gave away 9 black balloons, he found that he had an equal number of black and purple balloons left. How many balloons did Matt the Magician have at first?
Click here to see answer by ikleyn(52775) |
Question 1189699: James wants to buy a new rug for his living room. In a department store he finds a square rug that has a area of 9m2.
1. How long is each side of the rug?
2. How many of those rugs are needed to cover an area of 36 square meters?
3. If the room has a square area of 16 square meters and the rug is placed in the middle of the room, how much space would there be between each side of the rug and the wall?
Click here to see answer by ikleyn(52775) |
Question 1189722: Two mechanics worked on a car. The first mechanic worked for 15 hours, and the second mechanic worked for 5 hours. Together they charged a total of $1875.
What was the rate charged per hour by each mechanic if the sum of the two rates was $165 per hour?
Click here to see answer by josgarithmetic(39616) |
Question 1189722: Two mechanics worked on a car. The first mechanic worked for 15 hours, and the second mechanic worked for 5 hours. Together they charged a total of $1875.
What was the rate charged per hour by each mechanic if the sum of the two rates was $165 per hour?
Click here to see answer by ikleyn(52775) |
Question 1189749: Hi
Bill has 120 dollars more than James. Each week bill spends 25 dollars and James spends 22 dollars. They use up their money at the same time. How many weeks did it take bill to spend all his money.
thanks
Click here to see answer by Theo(13342) |
Question 1189788: Consider the different post hoc tests discussed in the readings and respond to the following:
Describe the general rationale behind using post hoc tests (i.e., when they are used and why).
One of the advantages of using an ANOVA (compared to using t-tests) is also a disadvantage—using an ANOVA makes it necessary to use post hoc tests if there is a significant main effect. We use a post hoc test because there is one specific advantage in using an ANOVA. Explain why using an ANOVA naturally leads to the need to have post hoc tests (hint: consider what you are examining when you conduct a post hoc analysis).
Conducting a post hoc test is similar to conducting multiple t-tests. As a result, it would seem natural to want to bypass the ANOVA and just use repeated t-tests. Explain why this approach is not necessarily a good idea and why an ANOVA followed by a post hoc analysis is beneficial.
Describe an experimental hypothesis and explain which post hoc test you would use if you find a significant overall effect. Include in your explanation the pros and cons of each test in making your decision.
Click here to see answer by ikleyn(52775) |
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3871..3915, 3916..3960, 3961..4005, 4006..4050, 4051..4095, 4096..4140, 4141..4185, 4186..4230, 4231..4275, 4276..4320, 4321..4365, 4366..4410, 4411..4455, 4456..4500, 4501..4545, 4546..4590, 4591..4635, 4636..4680, 4681..4725, 4726..4770, 4771..4815, 4816..4860, 4861..4905, 4906..4950, 4951..4995, 4996..5040, 5041..5085, 5086..5130, 5131..5175, 5176..5220, 5221..5265, 5266..5310, 5311..5355, 5356..5400, 5401..5445, 5446..5490, 5491..5535, 5536..5580, 5581..5625, 5626..5670, 5671..5715, 5716..5760, 5761..5805, 5806..5850, 5851..5895, 5896..5940, 5941..5985, 5986..6030, 6031..6075, 6076..6120, 6121..6165, 6166..6210, 6211..6255, 6256..6300, 6301..6345, 6346..6390, 6391..6435, 6436..6480, 6481..6525, 6526..6570, 6571..6615, 6616..6660, 6661..6705, 6706..6750, 6751..6795, 6796..6840, 6841..6885, 6886..6930, 6931..6975, 6976..7020, 7021..7065, 7066..7110, 7111..7155, 7156..7200, 7201..7245, 7246..7290, 7291..7335, 7336..7380, 7381..7425, 7426..7470, 7471..7515, 7516..7560, 7561..7605, 7606..7650, 7651..7695, 7696..7740, 7741..7785, 7786..7830, 7831..7875, 7876..7920, 7921..7965, 7966..8010, 8011..8055, 8056..8100, 8101..8145, 8146..8190, 8191..8235, 8236..8280, 8281..8325, 8326..8370, 8371..8415, 8416..8460, 8461..8505, 8506..8550, 8551..8595, 8596..8640, 8641..8685, 8686..8730, 8731..8775, 8776..8820, 8821..8865, 8866..8910, 8911..8955, 8956..9000, 9001..9045, 9046..9090, 9091..9135, 9136..9180, 9181..9225, 9226..9270, 9271..9315, 9316..9360, 9361..9405, 9406..9450, 9451..9495, 9496..9540, 9541..9585, 9586..9630, 9631..9675, 9676..9720, 9721..9765, 9766..9810, 9811..9855, 9856..9900, 9901..9945, 9946..9990, 9991..10035, 10036..10080, 10081..10125, 10126..10170, 10171..10215, 10216..10260, 10261..10305, 10306..10350, 10351..10395, 10396..10440, 10441..10485, 10486..10530, 10531..10575, 10576..10620, 10621..10665, 10666..10710, 10711..10755, 10756..10800, 10801..10845, 10846..10890, 10891..10935, 10936..10980, 10981..11025, 11026..11070, 11071..11115, 11116..11160, 11161..11205, 11206..11250, 11251..11295, 11296..11340, 11341..11385, 11386..11430, 11431..11475, 11476..11520, 11521..11565, 11566..11610, 11611..11655, 11656..11700, 11701..11745, 11746..11790, 11791..11835, 11836..11880, 11881..11925, 11926..11970, 11971..12015, 12016..12060, 12061..12105, 12106..12150, 12151..12195, 12196..12240, 12241..12285, 12286..12330, 12331..12375, 12376..12420, 12421..12465, 12466..12510, 12511..12555, 12556..12600, 12601..12645, 12646..12690, 12691..12735, 12736..12780, 12781..12825, 12826..12870, 12871..12915, 12916..12960, 12961..13005, 13006..13050, 13051..13095, 13096..13140, 13141..13185, 13186..13230, 13231..13275, 13276..13320, 13321..13365, 13366..13410, 13411..13455, 13456..13500, 13501..13545, 13546..13590, 13591..13635, 13636..13680, 13681..13725, 13726..13770, 13771..13815, 13816..13860, 13861..13905, 13906..13950, 13951..13995, 13996..14040, 14041..14085, 14086..14130, 14131..14175, 14176..14220, 14221..14265, 14266..14310, 14311..14355, 14356..14400, 14401..14445, 14446..14490, 14491..14535, 14536..14580, 14581..14625, 14626..14670, 14671..14715, 14716..14760, 14761..14805, 14806..14850, 14851..14895, 14896..14940, 14941..14985, 14986..15030, 15031..15075, 15076..15120, 15121..15165, 15166..15210, 15211..15255, 15256..15300, 15301..15345, 15346..15390, 15391..15435, 15436..15480, 15481..15525, 15526..15570, 15571..15615, 15616..15660, 15661..15705, 15706..15750, 15751..15795, 15796..15840, 15841..15885, 15886..15930, 15931..15975, 15976..16020, 16021..16065, 16066..16110, 16111..16155, 16156..16200, 16201..16245, 16246..16290, 16291..16335, 16336..16380, 16381..16425, 16426..16470, 16471..16515, 16516..16560, 16561..16605, 16606..16650, 16651..16695, 16696..16740, 16741..16785, 16786..16830, 16831..16875, 16876..16920, 16921..16965, 16966..17010, 17011..17055, 17056..17100, 17101..17145, 17146..17190, 17191..17235, 17236..17280, 17281..17325, 17326..17370, 17371..17415, 17416..17460, 17461..17505, 17506..17550, 17551..17595, 17596..17640, 17641..17685, 17686..17730, 17731..17775, 17776..17820, 17821..17865, 17866..17910, 17911..17955, 17956..18000, 18001..18045, 18046..18090, 18091..18135, 18136..18180, 18181..18225, 18226..18270, 18271..18315, 18316..18360, 18361..18405, 18406..18450, 18451..18495, 18496..18540, 18541..18585, 18586..18630, 18631..18675, 18676..18720, 18721..18765, 18766..18810, 18811..18855, 18856..18900, 18901..18945, 18946..18990, 18991..19035, 19036..19080, 19081..19125, 19126..19170, 19171..19215, 19216..19260, 19261..19305, 19306..19350, 19351..19395, 19396..19440, 19441..19485, 19486..19530, 19531..19575, 19576..19620, 19621..19665, 19666..19710, 19711..19755, 19756..19800, 19801..19845, 19846..19890, 19891..19935, 19936..19980, 19981..20025, 20026..20070, 20071..20115, 20116..20160, 20161..20205, 20206..20250, 20251..20295, 20296..20340, 20341..20385, 20386..20430, 20431..20475, 20476..20520, 20521..20565, 20566..20610, 20611..20655, 20656..20700, 20701..20745, 20746..20790, 20791..20835, 20836..20880, 20881..20925, 20926..20970, 20971..21015, 21016..21060, 21061..21105, 21106..21150, 21151..21195, 21196..21240, 21241..21285, 21286..21330, 21331..21375, 21376..21420, 21421..21465, 21466..21510, 21511..21555, 21556..21600, 21601..21645, 21646..21690, 21691..21735, 21736..21780, 21781..21825, 21826..21870, 21871..21915, 21916..21960, 21961..22005, 22006..22050, 22051..22095, 22096..22140, 22141..22185, 22186..22230, 22231..22275, 22276..22320, 22321..22365, 22366..22410, 22411..22455, 22456..22500, 22501..22545, 22546..22590, 22591..22635, 22636..22680, 22681..22725, 22726..22770, 22771..22815, 22816..22860, 22861..22905, 22906..22950, 22951..22995, 22996..23040, 23041..23085, 23086..23130, 23131..23175, 23176..23220, 23221..23265, 23266..23310, 23311..23355, 23356..23400, 23401..23445, 23446..23490, 23491..23535, 23536..23580, 23581..23625, 23626..23670, 23671..23715, 23716..23760, 23761..23805, 23806..23850, 23851..23895, 23896..23940, 23941..23985, 23986..24030, 24031..24075, 24076..24120, 24121..24165, 24166..24210, 24211..24255, 24256..24300, 24301..24345, 24346..24390, 24391..24435, 24436..24480, 24481..24525, 24526..24570, 24571..24615, 24616..24660, 24661..24705, 24706..24750, 24751..24795, 24796..24840, 24841..24885, 24886..24930, 24931..24975, 24976..25020, 25021..25065, 25066..25110, 25111..25155, 25156..25200, 25201..25245, 25246..25290, 25291..25335, 25336..25380, 25381..25425, 25426..25470, 25471..25515, 25516..25560, 25561..25605, 25606..25650, 25651..25695, 25696..25740, 25741..25785, 25786..25830, 25831..25875, 25876..25920, 25921..25965, 25966..26010, 26011..26055, 26056..26100, 26101..26145, 26146..26190, 26191..26235, 26236..26280, 26281..26325, 26326..26370, 26371..26415, 26416..26460, 26461..26505, 26506..26550, 26551..26595, 26596..26640, 26641..26685, 26686..26730, 26731..26775, 26776..26820, 26821..26865, 26866..26910, 26911..26955, 26956..27000, 27001..27045, 27046..27090, 27091..27135, 27136..27180, 27181..27225, 27226..27270, 27271..27315, 27316..27360, 27361..27405, 27406..27450, 27451..27495, 27496..27540, 27541..27585, 27586..27630, 27631..27675, 27676..27720, 27721..27765, 27766..27810, 27811..27855, 27856..27900, 27901..27945, 27946..27990, 27991..28035, 28036..28080, 28081..28125, 28126..28170, 28171..28215, 28216..28260, 28261..28305, 28306..28350, 28351..28395, 28396..28440, 28441..28485, 28486..28530, 28531..28575, 28576..28620, 28621..28665, 28666..28710, 28711..28755, 28756..28800, 28801..28845, 28846..28890, 28891..28935, 28936..28980, 28981..29025, 29026..29070, 29071..29115, 29116..29160, 29161..29205, 29206..29250, 29251..29295, 29296..29340, 29341..29385, 29386..29430, 29431..29475, 29476..29520, 29521..29565, 29566..29610, 29611..29655, 29656..29700, 29701..29745, 29746..29790, 29791..29835, 29836..29880, 29881..29925, 29926..29970, 29971..30015, 30016..30060, 30061..30105, 30106..30150, 30151..30195, 30196..30240, 30241..30285, 30286..30330, 30331..30375, 30376..30420, 30421..30465, 30466..30510, 30511..30555, 30556..30600, 30601..30645, 30646..30690
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