# Janice

Popular questions and responses by Janice
1. ## 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

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?

3. ## Algebra

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

4. ## 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

5. ## 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

6. ## 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

7. ## 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

8. ## 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

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 10. ## 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 11. ## 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 12. ## 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 13. ## 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 14. ## 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 15. ## 3rd grade math Write fact families for the numbers in 30 and 31.how are the fact families different asked on January 10, 2017 16. ## math How many 50 centimeter pieces of ribbon can Casey cut from a roll of 60 meters long? asked on March 18, 2015 17. ## 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 18. ## 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 19. ## 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 20. ## algebra solve the system of equations 2r+2s = 50 and 2r-s=17 asked on January 20, 2011 21. ## Probability 3 When confronted with an in-flight medical emergency, pilots and crew can consult staff physicians at MedAire, an emergency facility in Tempe, Arizona. If MedAire is called, there is a 4.8 percent chance that the flight will be diverted for an immediate asked on November 2, 2009 22. ## 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 23. ## 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 24. ## 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 25. ## 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 26. ## english what is correct barb-and i or barb and me asked on August 17, 2011 27. ## Math olympiad A machine is set to give out one number less than twice the number fed into it. A number is fed into the machine. the result is fed back into the machine. The second result is 53. What number was first fed into the machine? asked on December 10, 2009 28. ## 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 29. ## 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 30. ## 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 31. ## 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 32. ## psychology In general, the approach to stress embraced by psychoneuroimmunologists focuses on asked on December 14, 2014 33. ## trig Given BC = 53 cm, BD = 62 cm, CD = 80 cm, ABC = 53°, and ACB = 66°, find the following. (Round your answers to the nearest whole number.) (a) the length of the chainstay, AC AC = cm (b) BCD BCD = ° asked on November 16, 2012 34. ## 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 35. ## 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 36. ## 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 37. ## french How do you say I am hungry in the morning? Is it, J'ai faim du matin. asked on April 7, 2008 38. ## 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 using the asked on April 12, 2017 39. ## Maths In class 4A, 21 boys play cricket, 16 boys play football. 13 play both games. What is the smallest number of boys in that class asked on July 17, 2016 40. ## 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 41. ## Math I posted this under business the first time and got no answer so since its more mathematical here it is again: 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

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

43. ## Calc

∫ (2x+1)/(x+1) dx Please show steps if you work it. I think it's a partial fraction and worked with decomposition. Not sure though.

44. ## 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

45. ## 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.

46. ## 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.

47. ## 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.

48. ## 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?

49. ## Psychology

How would the researcher randomly select files? (What does the process look like?)

50. ## Physical Geography

38 degrees celcius is what degree F?

51. ## geometry

22. If I drink orange juice, then I am healthy.

52. ## math

What is the interest owed if the principle is 56,950. at 11 4/5 % interest for 155 days, using the 365 day calendar?

53. ## math

Consider that the age,x,of a unicorn in human equivalent years can be given by the formula f(x)= -0.002718x^4+0.097326x^3-1.3367x^2+12.46x+3.914. When a unicorn is 2.5 years old, what is its age in human eqivalent years? What about when it is 12 years old?

54. ## 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?

55. ## English-cover letter

This is the first sentence of my cover letter. Should I use "for" or "at"? Or is there a better way to phrase this sentence? I am writing to express my interest in working for [Company name] or I am writing to express my interest in working at [Company

56. ## english

Which sentence is correct? Anyone who wants a copy of the game may have it for their video library or Anyone who wants a copy of the game may have it for his or her video library?

57. ## 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

58. ## Chemistry

NaHCO3 + HCl -> NaCl+H2O+CO2 What is the normality of a sodium bi carbonate solution containing 5.08g NaHCO3 in 150 ml solution?

59. ## 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) +

60. ## 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)?

61. ## Chemistry

1) Is chalk a mixture or a compound? 2)We say that reactive metals react with acids to give salt + hydrogen gas.Is it necessary to write "dilute acids"?

62. ## Chemistry

Sorry, I still do not understand why metals react more vigorously in acids than in water?

63. ## Chemistry-help needed

Concentrated sulphuric acid and manganese(IV) oxide were added to the solid. On warming a gas was evolved which turned litmus colourless. The answer is that Cl2 gas was evolved and chloride ion is present. Can you please explain the reaction that took

64. ## Chemistry

When we test for carbon dioxide gas, we bubble it through limewater and get a white precipitate CaCO3. What is the equation for the reaction? Is it CO2 + Ca(OH)2 --> CaCO3 + H2O

65. ## Economics

Suppose you have an industry with 20 firms and the concentration ratio is 20%. How would you describe this industry?

66. ## 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

67. ## 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.

68. ## 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

69. ## 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

70. ## 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.

71. ## 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

72. ## algebra

tell whether x and y show direct variation and explain reasoning

73. ## Math

I have 6 hundred,4 tens, 5 ones and 7 tenths. What number am i

74. ## 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

75. ## 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 using the

76. ## 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

77. ## math

sue has 19 feet of material. she plans on making scarves. if each scarf is to be 7 1/2 inches, how many can she make?

78. ## math

359=sim 17 what number or sum would likely follow this numver

79. ## 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 $[XYZ] =150$.

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 91. ## 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

As a Christian, do you see tithing as a requirement? Should it be 10%?

93. ## Algebra

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

94. ## 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?

95. ## 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

96. ## word problem

A contractor, Mr. Parker charged his customer $100 for painting a rectangular ceiling of length 5.4m and width 3m. Another contractor, Mr. Lewis charged his customer$115 for painting a rectangular ceiling of length 5.7m and width 3.2m.The quality of work

97. ## 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

98. ## Calculus 2 Trigonometric Substitution

I'm working this problem: ∫ [1-tan^2 (x)] / [sec^2 (x)] dx ∫(1/secx)-[(sin^2x/cos^2x)/(1/cosx) ∫cosx-sinx(sinx/cosx) ∫cosx-∫sin^2(x)/cosx sinx-∫(1-cos^2(x))/cosx sinx-∫(1/cosx)-cosx sinx-∫secx-∫cosx sinx-sinx-∫secx =-ln |secxtanx|+C Can

99. ## Math

The table shows the actual retail market share of passenger cards from Ford Motor Company as a percentage of the U.S. market. Year Market Share 1975 23.6% 1980 17.2% 1985 18.8% 1990 20.0% 1995 20.7% A mathematical model for this date is given by f(x) =