Janice

Most popular questions and responses by Janice
1. Probability

A department store has determined that 25% of all their sales are credit sales. A random sample of 75 sales is selected and the proportion of credit sales in the sample is computed. a) What is the probability that the same proportion will be greater than

asked on November 23, 2006
2. Algebra

Farmer Ed has 9,000 meters of​ fencing, and wants to enclose a rectangular plot that borders on a river. If Farmer Ed does not fence the side along the​ river, what is the largest area that can be​ enclosed?

asked on June 24, 2015
3. Probability

A salesperson contacts eight potential customers per day. From past experience, we know that the probability of a potentail customer making a purchase is 0.10. a) What is the probability the salesperson will make at least two sales in a day? -Do you use

asked on November 23, 2006
4. Physics

A plane intends to north with a speed of 250 m/s relative to the ground through a high altitude cross wind of 50 m/s coming from the east. Determine the bearing that the plane should take( relative to due north), A) the planes speed with respect to the air

asked on June 19, 2017
5. Algebra

Under ideal conditions, a population of e. coli bacteria can double every 20 minutes. This behavior can be modeled by the exponential function: N(t)=N(lower case 0)(2^0.05t) If the initial number of e. coli bacteria is 5, how many bacteria will be present

asked on July 5, 2015
6. Algebra

A golf ball is struck by a​ 60-degree golf club at an initial velocity of 84 feet per second. The height of the golf ball in feet is given by the quadratic function h(x)= 16 x^2/(42)^2+72.7/42x where x is the horizontal distance of the golf ball from the

asked on June 25, 2015
7. Algebra

The CarryItAll​ mini-van, a popular vehicle among soccer​ moms, obeys the demand equation ppequals=negative StartFraction 1 Over 40 EndFraction x plus 19 comma 000−140x+19,000. The cost of producing xx vans is given by the function Upper C left

asked on June 22, 2015
8. health

Which of the following is true in regard to limited data sets? A.Patients must authorize the use of limited data sets. B. Those who receive limited data sets can pass them on witout restrictions. C. Limited data sets cant include a patiemts city, state,

asked on August 30, 2010
9. Algebra

A club currently has 300 members who pay $400 per month for membership dues. The​ club's board members want to increase monthly revenue by lowering the monthly dues in hopes of attracting new members. A market research study has shown that for each$ 1

asked on June 24, 2015
10. Algebra

what is the interest rate necessary for an investment to quadruple after 5 years of continuous compound interest? I keep getting r=11%

asked on July 10, 2015
11. math

How many 50 centimeter pieces of ribbon can Casey cut from a roll of 60 meters long?

asked on March 18, 2015

Farmer Brown planted corn and wheat on his 1200 acres of land. The cost of planting and harvesting corn is $275.00 per acre. The cost of planting and harvesting wheat is$125.00 per acre. If Farmer Brown's total cost was $244,500, how many acres of corn asked on July 19, 2015 13. algebra A rancher has 4 comma 7004,700 feet of fencing available to enclose a rectangular area bordering a river. He wants to separate his cows and horses by dividing the enclosure into two equal areas. If no fencing is required along the​ river, find the length asked on June 22, 2015 14. trig A plane is flying with an airspeed of 150 miles per hour and heading 155°. The wind currents are running at 25 miles per hour at 160° clockwise from due north. Use vectors to find the true course and ground speed of the plane. asked on November 16, 2012 15. Engineering/Chemistry Milk is flowing through a heat exchanger at a rate of 2000kg/h. he heat exchanger supplies 111,600kJ/h. The outlet temperature of the product is 95C. Determine the inlet temperature of the milk. The product specific heat is 3.9kJ/(kg*C) asked on January 31, 2012 16. Science What is the length of an aluminum rod at 65 C if its length at 15 C is 1.2 meters? I will be happy to critique your thinking. New length= oldlength(1+alpha*(65-15)) where alpha is the coefficent of linear expansion of aluminum 1.201386 meters asked on July 31, 2005 17. trig A ship is headed due north at a constant 20 miles per hour. Because of the ocean current, the true course of the ship is 15°. If the currents are a constant 18 miles per hour, in what direction are the currents running? (Enter your answers as a asked on November 16, 2012 18. Probability 2 Between 11 P.M. and midnight on Thursday night, Mystery Pizza gets an average of 4.2 telephone orders per hour. Find the probability that, a. at least 30 minutes will elapse before the next telephone order b. less than 15 minutes will elapse c. between 15 asked on November 2, 2009 19. Math I have 6 hundred,4 tens, 5 ones and 7 tenths. What number am i asked on August 22, 2017 20. math problem solving the digit 5 occurs two times in the population of fairbanks. what is the value of each 5? explain your answer fairbanks- 35,252 asked on August 28, 2014 21. Physics A jet plane lands with a velocity of 100 m/s and can accelerate at a maximum rate of -5.0 m/s2 as it come to rest. Can this plane land at an airport where the runway is 0.80 km long? asked on August 26, 2012 22. math If 3 different digits represent 3 different letters and each time a letter appears it represents the same digit how do i find the sum of the 3 digits represented? p is not zero. pm pm pm +pm ____ ap asked on January 20, 2010 23. Algebra The price p and the quantity x sold of a small​ flat-screen television set obeys the demand equation below. ​a) How much should be charged for the television set if there are 80 television sets in​ stock? ​b) What quantity x will maximize​ asked on June 25, 2015 24. math Suppose that 25% of all wise people are nice and half of all the nice people are wise. Suppose further that 25% of all the people are neither wise nor nice. What percent of all the people are both wise and nice? asked on March 16, 2011 25. physics a) In raising a 4800 N piano with a pulley system, the workers note that for every 2 m of rope pulled down, the piano rises 0.3 m. Ideally, how much force is required to lift the piano? (b) If the workers actually pull with 2500 N of force to lift the asked on February 8, 2007 26. 3rd grade math Write fact families for the numbers in 30 and 31.how are the fact families different asked on January 10, 2017 27. Social Studies Please check my answers :) 1.Which statement about ethnic groups in Southwest Asia is accurate? A. Arabs are the majority in every country in the region. B. Arabs are the largest ethnic group in the region.**** C. Kurds make up the largest ethnic group on asked on April 1, 2019 28. trig A plane has an airspeed of 190 miles per hour and a heading of 24.0°. The ground speed of the plane is 214 miles per hour, and its true course is in the direction of 40.0°. Find the speed and direction of the air currents, assuming they are constants. asked on November 16, 2012 29. Math Point$G$is the midpoint of median$\overline{XM}$of$\triangle XYZ$. Point$H$is the midpoint of$\overline{XY}$, and point$T$is the intersection of$\overline{HM}$and$\overline{YG}$. Find the area of$\triangle MTG$if$[XYZ] =150$. asked on April 21, 2016 30. trig A 52-foot wire running from the top of a tent pole to the ground makes an angle of 57° with the ground. If the length of the tent pole is 44 feet, how far is it from the bottom of the tent pole to the point where the wire is fastened to the ground? (The asked on November 16, 2012 31. Math Determine the solution set of the system. x^2+y^2=9 x+y=3 Very confused on this one! PLease Help! asked on August 19, 2011 32. Algebra Jim wants to build a rectangular parking lot along a busy street but only has 1,900 feet of fencing available. If no fencing is required along the​ street, find the maximum area of the parking lot. asked on June 24, 2015 33. Quantitative Statistic The following information is available. H0 : μ ≥ 220 H1 : μ < 220 A sample of 64 observations is selected from a normal population. The sample mean is 215, and the population standard deviation is 15. Conduct the following test of hypothesis asked on April 12, 2017 34. algebra Write a formula to express the following sentence as an equation: The sale price us 25% off the original price. Use S for sale price and P for original price to express S as a function of P. asked on August 31, 2014 35. Probability Daily output of Marathon's Garyville, Lousiana, refinery is normally distributed with a mean of 232,000 barrels of crude oil per day with a standard deviation of 7,000 barrels. Find the probability of producing.. a. at least 232,000 barrels b. between asked on November 2, 2009 36. AP Chemistry The normal boiling points of CO and SO2 are -192 degrees C and -10 degrees C, respectively A) At 25 degrees C and 1 atm, which gas would you expect to have a molar volume closest to the ideal value? B) If you reduce the deviation from ideal gas behavior, asked on January 4, 2007 37. Chemistry NaHCO3 + HCl -> NaCl+H2O+CO2 What is the normality of a sodium bi carbonate solution containing 5.08g NaHCO3 in 150 ml solution? asked on November 12, 2009 38. statistics Miller (2008) examined the energy drink consumption of college undergraduates and found that males use energy drinks significantly more often than females. To further investigate this phenomenon, suppose a researcher selects a random sample of n=36 male asked on July 10, 2013 39. Chemistry 12 When 1.00 g. of MgCO3 is added to 2.0 L of water, some, but not all, will dissolve to form a saturated solution. Calculate the mass of solid that remains undissolved. asked on April 4, 2013 40. algebra Farmer Ed has 9 comma 0009,000 meters of​ fencing, and wants to enclose a rectangular plot that borders on a river. If Farmer Ed does not fence the side along the​ river, what is the largest area that can be​ enclosed? asked on June 22, 2015 41. statistics If 86% of households have cable television and three households are picked at random, what is the probability that at least one of those three picked will have cable television? asked on September 25, 2011 42. chemistry Predict the sign of Delta S in the system for each of the following reactions. 2H3O^+(aq) + CO3^2-(aq) ---> CO2(g) + 3H2O(l) -,+, or 0? asked on March 3, 2010 43. Molarity Find the molarity of a salt water solution containing 0.27 mol NaCl in 150g of H2O. My work: 0.27 mol NaCl/150 g x 1000g/1kg = 1.8 M is this correct, i wasn't really sure what to do... asked on November 12, 2009 44. algebra You randomly choose one of the tiles and flip the coin. Find the probability of the compound event. Write your answer as a fraction or percent rounded to the nearest tenth. asked on May 2, 2019 45. CHEMISTRY 4NH3 + 7O2 = 4NO2 + 6H2O HHOW MANY MOLES OF AMMONIA WILL BE REQUIRED TO PRODUCE 10.0 MOLES OF WATER? The equation tells you 4 mols NH3 will produce 6 mols H2O. Can you set up a proportion to make that work? For example, 2 mols NH3 would produce 3 mols H2O asked on July 17, 2007 46. Chemistry Suppose you are assigned to prepare a buffer of 0.10M HNO2 (Ka=1.7 x 10^-4) and 0.10M NaNO2 by mixing equal volumes of both solutions. What is the pH of the resultant solution? How would I first start this question? I have no clue what the steps are to be asked on April 15, 2015 47. health Which one of the following factors would be considered de-identified information' A. Patients name-Joe Black B.Patients policy number-12345678912 C. Social Security Number-555-121-2222 D. Patient condition-patient is improving asked on August 30, 2010 48. algebra solve the system of equations 2r+2s = 50 and 2r-s=17 asked on January 20, 2011 49. statistics Test consist of 10 multiple choice questions each having 4 possible answers one being correct. you guessed all 10 what is the probability of getting less than 30% asked on July 13, 2013 50. algebra A club currently has 300300 members who pay$ 400$400 per month for membership dues. The​ club's board members want to increase monthly revenue by lowering the monthly dues in hopes of attracting new members. A market research study has shown that for asked on June 22, 2015 51. ps316 There 112 seats there 7 seats in each row and 70 people are seated how many rows are empty asked on November 30, 2014 52. Physics if a car is moving around a circular track at a constant speed of 55 mi/h, is there a net force acting on the car? asked on October 25, 2010 53. Chemistry Since gases can be highly compressed, what must be true of the spaces between the molecules of the gas? asked on February 23, 2008 54. psychology In general, the approach to stress embraced by psychoneuroimmunologists focuses on asked on December 14, 2014 55. Physics A CAR HAS A MASS OF 1200KG TRAVELLING ON A LEVEL ROAD. THE CAR DECELERATED AT A RATE OF 10M/S^2 TILL THE CAR STOPPED. iT HAS TO OVERCOME A TOTAL RESISTANCE OF 400N WHILE BRAKING. (I) CALCULATE THE BRAKING FORCE OF THE CAR (II) WHAT WAS THE DRIVING OF CAR asked on June 17, 2011 56. Quantitative Statistic Pennsylvania Refining Company is studying the relationship between the pump price of gasoline and the number of gallons sold. For a sample of 20 stations last Tuesday, the correlation was .78. At the .01 significance level, is the correlation in the asked on April 18, 2017 57. trig Find all solutions to the following triangle. (Round your answers for angles A, B, A', and B' to the nearest minute. Round your answers for sides a and a' to the nearest whole number. If either triangle is not possible, enter NONE in each corresponding asked on November 16, 2012 58. UMD A solution of H2SO4(aq) with a molal concentration of 3.22 m has a density of 1.183 g/mL. What is the molar concentration of this solution? asked on September 30, 2012 59. chemistry In reverse osmosis, water flows out of a salt solution until the osmotic pressure of the solution equals the applied pressure. If a pressure of 47.0 bar is applied to seawater, what will be the final concentration of the seawater at 20 °C when reverse asked on February 19, 2012 60. Chemistry how many psi are in an atm? 14.7 lbs/in2 = 1 atm. An easy way to have your conversions checked is to go to www.google.com and type in, for example, 1 atmosphere to pounds per square inch and hit the go button. asked on July 17, 2007 61. french Where you usually eat? Ou tu manges d'habitude? I was wondering for asking the question, where the d'habitude goes? End of sentence? And for answering... Je manges au restaurant d'habitude. or D'habitude, je manges au restaurant. or Je manges d'habitude au asked on April 10, 2008 62. physics In the Atwood machine shown in Figure 5.14a, m1 = 2.00 kg and m2 = 8.00 kg. The masses of the pulley and string are negligible by comparison. The pulley turns without friction and the string does not stretch. The lighter object is released with a sharp asked on October 21, 2015 63. Calculus 2 ∫ tan^2 (x) sec^4 (x) dx ∫ [tan^2 (t) + tan^4 (t)] dt ∫ [1-tan^2 (x)] / [sec^2 (x)] dx Trigonometric integral Please show steps so I can understand! asked on March 14, 2015 64. chemistry consider the reaction between copper metal and chlorine gas producing solid copper(1) chloride. when 16.2g of copper is reacted in an excess of chlorine, how many grams of copper(1) chloride will be produced asked on April 28, 2012 65. english what is correct barb-and i or barb and me asked on August 17, 2011 66. accounting The stockholders' equity accounts of Lawrence Company have the following balances on December 31, 2010. Common stock,$10 par, 274,000 shares issued and outstanding $2,740,000 Paid-in capital in excess of par 1,200,000 Retained earnings 5,600,000 Shares of asked on September 10, 2010 67. Math Hey, Inequalties are not my favourite topic, but I'd like to learn more about them. Could anyone be able to list down brif notes about them here. asked on May 31, 2010 68. Business I want to buy a car with cash in 4 years. I have$10,000.00 that I can invest today. I can get a bond earning 4%. How much will I have for the purchase? This is what I am thinking for an answer but not quite sure: N=4 years I=4% PV=10,000 for a total of

asked on July 7, 2015
69. algebra

Jim wants to build a rectangular parking lot along a busy street but only has 1 comma 9001,900 feet of fencing available. If no fencing is required along the​ street, find the maximum area of the parking lot.

asked on June 22, 2015
70. Statistics

A recent article in a computer magazine suggested that the mean time to fully learn a new software program is 40 hours. A sample of 100 first-time users of a new statistics program revealed the mean time to learn it was 39 hours with the standard deviation

asked on February 10, 2010
71. physics

Consider the line passing through the center of the cue ball as the x axis. At the point of collision with the solid ball on the table, a line passing through the centers of the cue ball and the solid ball form a 45° angle with the X axis. Assume no

asked on February 13, 2016
72. Algebra

Form a third degree polynomial function with real coefficients such that 2+i and -5 are zeros. f(x)= ?

asked on June 29, 2015
73. Finite Math

: Four cards are drawn without replacement from a well shuffled standard deck of cards. Let X be the number of aces drawn. 12. What are the possible values of the random variable X? Write them in increasing order as a set using roster (or list) notation.

asked on December 14, 2013
74. ALGEBRA I

You need to rent a moving truck for two days. Rider Moving Trucks charges $50 per day and$.50 per mile. UMove Trucks charges $45 per day and$0.75 per mile. Write an equation describing each situation. Graph them on the same xy axis. You only need

asked on March 20, 2017
75. Chem

A gas has density of 1.977 g/dm3 at STP (a) what is its molecular mass? (b) what is its density at 77¢XC and 0.95 atm pressure? (c)If the gas is an oxide and has the formula XO2, what is the atomic mass of X

asked on November 15, 2015
76. Math

A juice concentrate containing 65% solids is added to a single-strength juice solution(containing 15% solid), in order to generate a final product which contains 45% solids. Calculate the amounts required for the concentrate and for the single strength

asked on February 7, 2012
77. Physics

How will mechanical energy affect different points of oscillation on a vertical spring? Well i know that mechanical energy is PE and KE...So when the spring is compressed the mechanical energy will equal the PE and when extended or stretched it will equal

asked on June 23, 2011
78. Chemistry-confused

All alkalis produce hydroxide ions when dissolved in water. How do we write the chemical equation for aqueous ammonia? I see some textbooks write it as ammonia gas dissolving in water to form ammonium ions and hydroxide ions. NH3(g)+ H2O(l) ==> NH4+(aq) +

asked on April 10, 2009
79. College Econ

The gross national debt initially is equal to $2.5 trillion and the federal government then runs a defict of$100 billion: 1. What is the new level of gross national debt? 2. If 100 percent of this deficit is financed by the sales of securities to the

asked on February 16, 2009
80. Finance

High Hills plc produce underwater turbines to generate energy and are considering introducing machinery that will reduce the labour hours required to produce a turbine from 5 hours to 2 hours for the remainder of the product life cycle of 3 years. The

asked on December 15, 2015
81. physics

A care package is released from a plane moving with a horizontal speed of 123 m/s. The plane flies at a constant height of 1013 m above the ground. a.) Find the speed of the care package just before it hits the ground. b.) Find the magnitude of the angle

asked on October 2, 2015
82. Math

I have a problem. A theater runs 2 movies The first movie is 40 minutes long, the second is 60 minutes long. They start at 3:00. At what time will they start at the same time again? I know the answer is 5:00. I know it robably has something to do with 120

asked on September 20, 2009
83. algebra

tell whether x and y show direct variation and explain reasoning

asked on September 24, 2017
84. physics

What physics is involved for a passenger feeling pushed backward into the seat of an airplane when it accelerates along the runway during takeoff?

asked on September 16, 2014
85. statistic of behavioral science

for each of the following, identify the exam score that should lead to the better grade. In each case, explain your answer. A score of x=56, on an exam with the mean =50 and the standard deviation of 4; or a score of x=60 on an exam with the mean=50 and

asked on June 22, 2013
86. trig

A barge is pulled by two tugboats. The first tugboat is traveling at a speed of 16 knots with heading 135°, and the second tugboat is traveling at a speed of 15 knots with heading 195°. Find the resulting speed and direction of the barge. (Round your

asked on November 16, 2012

If I went to a store and spent $16 more than half the money I had in my pocket and was left with$16 in my pocket how much did i have when I went into the store? I'm thinkng $64 but not positive asked on January 7, 2010 88. Chemistry We say that most bases are metal oxides and hydroxides, so an example of a base that is not ana oxide or hydroxide would be aqueous ammonia NH3(aq)? asked on April 10, 2009 89. french Passe compose: (Please forgive my accent marks) i know the past participle agrees with the subject, my text only have example for aller...je suis alle(e)...tu es alle(e)...nous sommes alle(e)s. But i am not sure for other verbs like descendre and partir... asked on April 2, 2008 90. Science A sliver bar 0.125 meter long is subjected to a temperature change from 200C to 100C.What will the length of the bar after the temperature change? See the aluminum question. I will be happy to critique your work and thinking. A silver bar 0.125 meter long asked on July 31, 2005 91. Math I want to buy a house in 5 years. I need to have a down payment of$50,000. How much do I need to have today in order to have the down payment, if I can earn 5%? I have tried to figure this out and have arrived at 39200.00

asked on July 8, 2015
92. trig

Find all solutions to the following triangle. (Round your answers for angles A, C, A', and C' to the nearest whole number. Round your answers for sides c and c' to two decimal places. If either triangle is not possible, enter NONE in each corresponding

asked on November 16, 2012
93. trig

Find all solutions to the following triangle. (Round your answers to one decimal place. If either triangle is not possible, enter NONE in each corresponding answer blank.) A = 115.2¡ã, a = 43.6 cm, b = 23.1 cm First triangle (assume B ¡Ü 90¡ã): B =

asked on November 16, 2012
94. physics

A weight lifter lits a 1250 pound barbell 2 meters in 3 seconds. How much power was used to lift the barbell

asked on November 4, 2010
95. Chemistry

An alkali is a soluble base. Is barium hydroxide an alkali?

asked on April 10, 2009
96. chemistry

Alloys are harder and stronger than pure metals. I saw this sentence, "Alloys make the metal harder by preventing the layers of atoms from sliding." I think it is more correct to add the word "easily" at the end of the sentence since in an alloy, it is

asked on January 25, 2009

I can only put away $1,000 a year toward retirement. I am 22 and plan on retiring at 65 and earning 6%. How much will I have at retirement? Not positive the answer I got is correct..my answer is$464,215.00

asked on August 18, 2015

I want to buy a house in 5 years. I need to have a down payment of $50,000. How much do I need to have today in order to have the down payment, if I can earn 5%? not sure how to go about this problem asked on July 8, 2015 99. statistics Playing game of chance and pay 300 by rolling a fair die one time if you rome a 2 and receive$1300 if you roll a 4 or six you receive \$900 if you ore a 3 5 or 9 receive nothing. find expected value for this game. based on value is it a good game to play?

asked on July 13, 2013
100. trig

Find all solutions to the following triangle. (Round your answers for angles A, C, A', and C' to the nearest minute. Round your answers for sides a and a' to two decimal places. If either triangle is not possible, enter NONE in each corresponding answer

asked on November 16, 2012

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