Popular questions and responses by Dana
  1. Calculus

    Find a formula for the fourth degree polynomial p(x) whose graph is symmetric about the y-axis (meaning it has no odd powers of x), and which has a y-intercept of 10, and global maxima at (3,253) and (−3,253).

    asked on April 7, 2013
  2. chemistry

    Calcium carbonate CaCO3 reacts with stomach acid (HCl, hydrochloric acid) according to the following equation: CaCO3(s)+2HCl(aq)->CaCl2(aq)+H2O(l)+CO2(g) Tums, an antacid, contains CaCO3. If Tums is added to 35.0 mL of 0.300 M HCl,how many grams of CO2 gas

    asked on October 8, 2010
  3. math

    Four accounting majors, two economics majors, and three marketing majors have interviewed for five different positions with a large company. Find the number of different ways that five of these could be hired. One accounting major, one economics major, and

    asked on May 4, 2008
  4. chemistry

    Calculate the expansion work done when 50 g of water is electrolysed under constant pressure at 25C

    asked on September 5, 2010
  5. Math

    Find the probability for the experiment of tossing a six-sided die twice. Put the answer in a/b form. P(the sum is odd or prime)

    asked on April 28, 2015
  6. english 4

    Change the italicized clause to a nominative absolute. Rewrite the entire sentence in the box below. As the hurricane season was over, people returned to the cottages on the beach. Change the italicized clause to a nominative absolute. Rewrite the entire

    asked on November 9, 2014
  7. trig

    -Find sin(x+y), cos(x-y), tan(x+y) and the quadrant of x+y sinx=-3/5, cosy=-7/25, x and y in Q3

    asked on November 16, 2011
  8. math

    Solve the problem. A shirt company has 4 designs that can be made with short or long sleeves. There are 5 color patterns available. How many different types of shirts are available from this company? a. 9 types b. 40 types c. 11 types d. 20 types

    asked on May 4, 2008
  9. Geometry

    The point A (3, 4) is reflected over the line x = 2, and then is reflected over the line x = -4. What are the coordinates of A'? (1, 2) (9, 4) (-9, 4) (1, 4)

    asked on January 23, 2012
  10. Geometry

    The measures of 6 of the interior angles of a heptagon are: 120°, 150°, 135°, 170°, 90°, and 125°. What is the measure of the largest exterior angle? 90° 80° 75° 85°

    asked on January 23, 2012
  11. geometry

    Answer has to be in exact form. Find the area of the region between a regular hexagon with sides of 6" and its inscribed circle.

    asked on January 15, 2012
  12. math

    How many distinguishable permutations of letters are possible in the word? BASEBALL a. 20,160 b. 10,080 c. 5040 d. 40,320

    asked on May 4, 2008
  13. physics

    A 1000-kg space probe is motionless in space. To start moving, its main engine is fired for 5 seconds during which time it ejects exhaust gases at 5000 m/s. At the end of this process it is moving at 20 m/s. The approx. mass of the ejected gas is??

    asked on October 10, 2010
  14. macroeconomics

    Which of the problems in the construction of the CPI might be illustrated by each of the following situations? Substitution Bias, Introduction of New Goods, Unmeasured Quality Change 1. The invention of the iPod 2. The introduction of air bags in cars 3.

    asked on September 11, 2013
  15. financial planning

    corp had earnings before taxes of $400,000 and sales of $2,000,000. If it is in the 40% tax bracket its after tax profit margin is?

    asked on July 21, 2012
  16. math

    To win the World Series, a baseball team must win 4 games out of a maximum of 7 games. To solve the problem, list the possible arrangements of losses and wins. How many ways are there of winning the World Series in exactly 6 games if the winning team wins

    asked on May 4, 2008
  17. Algebra 1

    What is the simplest form of following expression -(8n-5v)

    asked on September 22, 2017
  18. maths

    you have eight $1coins and five $2 coins in your pocket. What is the smallest number of coins you need to take out of your pocket to be certain of having atleast one of each coin?

    asked on March 30, 2017
  19. science

    which of the following cellular organelles is responsible for realising the energy contained in food

    asked on April 27, 2016
  20. ph science

    a flight attendant pulls a wheeled suitcase, applying a 64-N force at a 35 degree angle to horizontal. how much work does she do in pulling the suitcase 45m f=d/t=64+35=99/2x45=2227.5

    asked on April 16, 2016
  21. maths

    At the party Jade ate less than four jelly beans. Nicole ate twice as many jelly beans as Jade. Kahlee had twice as many as Nicole. Chris had two more than kahlee. Chris ate ten jelly beans. How many jelly beans were eaten at the party?

    asked on September 18, 2015
  22. math

    The arrow is spun several times until it stops at a number 4. Find the probability that this happens on the third spin.

    asked on March 21, 2015
  23. math

    A flagpole stands at a right angle to the horizontal at the bottom of a slope. The slope has an incline of 8° with the horizontal. The flagpole casts a 20 meter long shadow up the slope. The angle of elevation of the sun is 17°. Determine the height of

    asked on July 21, 2012
  24. Geometry

    The quadrilateral with these following vertices is a parallelogram. (-4, -3), (2, -3), (4, -6), (-4, -6) True False

    asked on January 19, 2012
  25. geometry

    the means of a proportion are 4 and 17. List all possible oairs of positive integers that could be the extremes of the proportion

    asked on November 15, 2011

    4BF3+3H2O=H3BO3+3HBF4 if the reaction vessel contains 0.496 mol BF3 and 5.63g of H2O, which compound is the limiting reactant? how many molesof HBF4 can be produced?

    asked on April 19, 2011


    asked on April 19, 2011
  28. physics

    a .105 kg hockey puck moving at 48 m/s is caught by a 75 kg goalie at rest. With what speed does the slide on the ice?

    asked on January 31, 2011
  29. math

    Classify each quadrilateral using the best description

    asked on November 14, 2010
  30. physics

    what distance does the electromagnetic radiation travel in 50.0 (nu)s?

    asked on October 20, 2010
  31. physics

    a car starting from rest is accelerated at 2m/s(square) for 10s, then moves at constant velocity for 20s and then decelerates at 1m/s(square), finally stops. how far does it travel during its trip? please help me! I need in solution for that problem

    asked on September 4, 2010
  32. Algebra

    In a class of 50 students, 29 are Democrats, 11 are business majors, and 5 of the business majors are Democrats. If one student is randomly selected from the class, find the probability of choosing: (a) Democrat who is not a business major. (b) A student

    asked on April 27, 2018
  33. maths

    Four girls each caught a fish while at the beach. Teri's was double the size of Jane's. Jane's fish was shorter than Lynn's by nine centimetres. Lynn's was 18 centimetres longer than Reina's who caught a fish 30 centimetres long. How long were Teri's

    asked on September 17, 2015
  34. Chem

    List several anions, by formula, that contribute to the salinity of a water sample. Is this the answer? : chloride sulfate sodium , Na bicarbonate carbonate bromide fluoride What does it mean by formula? thanks so much !

    asked on September 9, 2015
  35. Math

    θ equals the angle in Quadrant II so that cot θ= -3. Find the values for sin θ, cos θ, and tan θ.

    asked on December 4, 2014
  36. physics

    Approximately how far will the people have to travel to move the truck 1.5m if |Truck force is 4500N and people are 1200N?

    asked on November 29, 2011
  37. math

    write a cosecant function with a period of 4pi, phase shift of 4 pi, and vertical shift of 8. My answer:csc(theta/2-8pi)-8

    asked on August 10, 2011
  38. chemistry


    asked on April 19, 2011
  39. statistics

    For a sample with a mean of M=45, a score of x=59 corresponds to z=2.00.What is the sample standard deviation?

    asked on January 31, 2011
  40. Statistics for social sciences

    For a population with u=50 and o=8, find the z-score for x=54, x=42, x=62 ,x=48 ,x=52 ,x=34

    asked on January 31, 2011
  41. english

    Pronouns used as subjects or subject complements are in the nominative case. True or False

    asked on January 4, 2011
  42. chemistry

    Balance the following redox reactions assuming a basic solution. Show all the steps. a. MnO2(s) -> MnO4^-2 + H2 (g) b. H2O2 (aq) + Cl2O7 (g) -> ClO2- (aq) + O2 (g) How can you balance these if for example in part a., there is no H on the left side... can I

    asked on November 1, 2010
  43. english

    The face of this admired accomplished American papers on postage stamps coins and paper money of the United States. Can you please help me with correct comma placement?

    asked on September 26, 2010
  44. English

    Does a SAT essay require a title?

    asked on May 31, 2009
  45. Physics

    Four equal masses of 4.0 kg are placed at the vertices of a square of side 8.0 m. Find the force on the mass at the top left vertex.

    asked on October 17, 2018
  46. Physics

    Two alpha particles (helium nuclei) are held in place 1.0 nm apart. Describe the motion of the two nuclei when they are released.

    asked on September 29, 2018
  47. Physics

    Two alpha particles (helium nuclei) are held in place 1.0 nm apart (use 120 on for the diameter of a helium atom). Compare the electric and gravitational forces acting between the two nuclei.

    asked on September 29, 2018
  48. math

    five people are sharing 1 bottle of juice .What fraction of the bottle of juice will each person receive?

    asked on January 30, 2018
  49. Math

    There is 40 baskets for $715 and 400 for $5,935. there is a deivery fee. what is the one - time delivery fee?

    asked on September 27, 2017
  50. literature

    How is the concept of cultural encounter treated in the short story “One out of Many”?

    asked on April 23, 2017
  51. business

    i need to understand this question , i have to write an essay and i don't understand it .There are as many ways to use information technology in business as there are business activities to be pursued. Human Resource management has many activities that are

    asked on April 21, 2017
  52. Science

    What volume of a 2.00 M HCL solution can be prepared by diluting 0.350L of 14.0 M HCl solution?

    asked on December 5, 2016
  53. Chemistry

    If a 30.pL tank of laughing gas contains 2.74 moles of N2O at 25 degrees C, what is the pressure (atm) in the tank?

    asked on December 5, 2016
  54. Maths

    A blue train is 500m long and is travelling at 58km/h. A yellow train is 400m long and is travelling at 32km/h. The trains are travelling towards each other. Ooriginally, the trains are 900km apart. A) how long will it take for the 2 trains to reach each

    asked on October 4, 2016
  55. Maths

    Sally and ben are running around a 400m circular track. Sally can run at 8m/s while ban can run at 6m/s. They start at the same time and run in the same direction. How far are they apart after 5 minutes?

    asked on October 4, 2016
  56. Physics

    You're driving parallel to train tracks at 52.0 km/h when a train passes you, going a steady 91.0 km/h. A track crossing is up ahead, so you begin to speed up at 8.00 m/s2. How far do you drive before you pass the train?

    asked on September 21, 2016
  57. Fundamental Chemistry

    Given the balanced reaction below; write out the balanced ionic equation and the balanced net ionic equation. Include phase labels and charges where appropriate. Cu(s) + Zn(NO3)2 (aq) → Cu(NO3)2 (aq) + Zn(s)

    asked on April 13, 2016
  58. Maths

    A plane is flying at an altitude of 880 m. Sarah is standing on the ground and she observes the angle of elevation to the plane as 67'40'. Twenty-five seconds later the angle of elevation had changed to 24'30'. (a) How far has the plane flown in that time?

    asked on February 5, 2016
  59. english

    1. It's raining cats and dogs. 2. Hit the sack. 3. You're bouncing off the walls. What is the inferential meaning of all the 3 idioms?

    asked on November 2, 2015
  60. Finite

    One coin is fair and one is weighted so that Pr[H]=211. You randomly select one of the two coins, and flip it 5 times, noting the result of each flip. What is the expected number of heads?

    asked on October 13, 2015
  61. pre algebra

    1/4 my answer is 0.25 am i correct?

    asked on August 31, 2015
  62. pre algebra

    o.12 my answer is x=3/25 an i correct?

    asked on August 31, 2015
  63. pre algebra

    is 0 a whole number, integer, rational, and real number?

    asked on August 31, 2015
  64. pre algebra

    is 0.75 a rational numbre?

    asked on August 31, 2015
  65. math

    1/4 my answer is 0.25 am i correct?

    asked on August 31, 2015
  66. Math Check

    Hi! Can someone check my answers for this question? Thanks!! Directions: Look for the probability for an experiment that deals with the drawing of two marbles (without replacement) from a bag containing one green, two yellow, and three red marbles. Put the

    asked on April 28, 2015
  67. Math Check

    Hi! Can someone check my answers for this question? Thanks!! Directions: Look for the probability for an experiment that deals with the drawing of two marbles (without replacement) from a bag containing one green, two yellow, and three red marbles. Put the

    asked on April 28, 2015
  68. math

    which sets of ordered pairs represents a linear relationship? if the relationship is linear, calculate the rate of change of the dependent variable. 1. (-2,4),(-1,1),(0,0),(1,1),(2,4),(3,9) 2. (5,13),(6,15),(7,17),(8,19),(9,21),(10,23) 3.

    asked on March 4, 2015
  69. Math

    provide a table of six values that represent a linear relation? 6 values mean that 6 number on each side x and y value?

    asked on March 3, 2015
  70. statistics

    if you earned a 17 on a quiz what would your score indicate the best performance a. x=15 and s=2.4 b. x=15 and s=2.1 c. x=17 and s=2.4 d. x=17 and s=2.1

    asked on February 15, 2015
  71. statistics

    A teacher is interested in finding out how many hours a day a college student at Monroe Community College exercises. The teacher randomly chooses 1000 college students and asks them, “How many hours do you exercise?” Explain whether there could be any

    asked on February 15, 2015
  72. Math

    I am a parent and need help with this problem so I can show my daughter how to complete. A recipe calls for 8 cups of flour. The amount of flour is 10 cups less than twice the amount of milk. Write and solve an equation to find the amount of milk in the

    asked on February 1, 2015
  73. math

    Lin borrowed $950 for a new laptop. She will pay $25.80 each month for the next 48 months. Find the simple interest rate for her loan. (Rounded to the nearest 10th of a percent.)

    asked on January 22, 2015
  74. math

    TJ had a car loan for $5800. Over the course of the loan, he paid a total of $1508 in interest at a rate of 6.5%. Over how many months did TJ pay off the car loan?

    asked on January 22, 2015
  75. chemistry

    Gasoline sold in Ontario must contain at least 5.00% v/v ethanol? How much gasoline contains 1.50 L of ethanol? my answer is 22.5 ml is this correct

    asked on December 16, 2014
  76. Calculus

    Hi! I need help with this problem: For 0(smaller or equal to) t (smaller or equal to) 9, a particle moves along the x-axis. The velocity of the particle is given by v(t)= (sin pi/4 t). The particle is at position x= -4 when t=0. a) For 0 (smaller or equal

    asked on December 11, 2014
  77. math

    Jane had 16m of ribbon. She gave 3 2/7of it to Linda and 4 1/3 to Sarah. How much ribbon was left?

    asked on December 9, 2014
  78. Pleaaaaaase help with differential graph question

    Suppose further that the population’s rate of change is governed by the differential equation dP/dt = f(P) where f (P) is the function graphed. For which values of the population P does the population increase? (b) For which values of the population P

    asked on December 1, 2014
  79. Geometry

    A carpenter is building a staircase using his knowledge of right angles. The steps have a horizontal landing and a vertical rise causing each step to be a right triangle cut out. Depending on the purpose, steps may be adjusted by the angle of elevation

    asked on October 30, 2014
  80. Algebra, math,

    A helicopter can fly 120 mph in still air. When flying to a town 700 miles away and returning the helicopter has to fly with a tailwind of x mph when going to the town and with a head wind of x mph when returning. If the return flight takes 2 hours more

    asked on May 20, 2014
  81. Homework helpline?

    Is there a homework helpline for college level I can call and ask homework questions through the phone? I know there is one that is available for elementary school and middle school, and it would seem a little ludicrous for one to be available for this

    asked on April 28, 2014
  82. Business management

    television is an attractive advertising medium because it A. Offers mass coverage and flexibility B. is relatively expensive C. offers rapidly growing network audience D. provides instant feedback which can be used to measure effectiveness

    asked on March 20, 2014
  83. math

    Three boys are sharing a cake. Joey ate 2/5 of the cake, Billy ate 1/3 of it, and Matt ate the remaining piece. What is the ratio of Joey's piece to Billy's piece to Matt's piece?

    asked on March 14, 2014
  84. Physical Science

    a rocket moves through outer space at 11,000 m/s. At this rate, how much time would be required to travel the distance from Earth to the Moon, which is 381,000 km?

    asked on September 15, 2013
  85. geometry

    Al and Harpreet are racing to Wing Stop to get the last batch of fries made for lunch. Al participates in cross country and can cover (write in value) per minute. Harpreet likes to watch TV and play video games. She is out of shape and can only cover 3

    asked on October 6, 2012
  86. business lowercapstone

    Assignment Type: Individual Project Deliverable Length: 4-5 body pages, 1 PERT chart, 1 Gantt chart Points Possible: 185 Due Date: 4/22/2012 11:59:59 PM CT Using your current work organization (or an organization of interest) as the subject matter,

    asked on April 16, 2012
  87. Geometry

    The point A (3, 4) is reflected over the line x = 2, and then is reflected over the line x = -4. What are the coordinates of A'? (1, 2) (9, 4) (-9, 4) (1, 4)

    asked on January 23, 2012
  88. Geometry

    The point A(-2, 3) is translated using T: (x,y) → (x + 4, y + 2). What is the distance from A to A'? square root 6 2 square root 2 5 2 square root 5

    asked on January 19, 2012
  89. geometry

    The coordinate of the midpoint of segment AB is (-3, 2). Find the coordinate of A if the coordinate of B is (0, 2). A = (-6,2) (-3/2,2) (3,2)

    asked on January 16, 2012
  90. geometry

    Answer has to be in exact form.Find the area of a segment formed by a chord 8" long in a circle with radius of 8".

    asked on January 15, 2012
  91. Physics

    A ferry is crossing a river. The ferry is headed due north with a speed of 2.8 m/s relative to the water and the river’s velocity is 4.9 m/s to the east. a) What is magnitude of the boat’s velocity relative to Earth

    asked on October 17, 2011
  92. Physics

    A ferry is crossing a river. The ferry is headed due north with a speed of 2.8 m/s relative to the water and the river’s velocity is 4.9 m/s to the east. a) What is magnitude of the boat’s velocity relative to Earth

    asked on October 17, 2011
  93. algebra

    Find a formula that expresses the fact that P(x, y) is a distance 9 from the origin.

    asked on October 3, 2011
  94. math

    tan(3arc cos3/4)? =3cos3/4 =cos=4 sqrt17/4 = tan

    asked on August 9, 2011
  95. chemistry

    2LiOH + Co2 = Li2CO3 +H2O If a cannister absorbed 100.0g of CO2 from the air that resulted in the production of 148.5g of Li2CO3, what was the percent yeild for Li2CO3.

    asked on April 19, 2011
  96. economics

    how would you illustrate the impact of each of the following events on a production possibilities curve for factory goods and farm goods? a.) the computer in invented b.)1 million farm workers remain unemployed for six months c.) a drought

    asked on April 7, 2011
  97. Finance

    what would happen if i had a credit card with $2000 dollars on it with an interest rate of 10%.the minimum payment is $50 a month how long would it take to pay off

    asked on April 6, 2011
  98. math

    A carpenter can make some chairs and stools. All together there are 32 legs. If the carpenter has pieces of wood that can be used to make 9 seats, how many chairs and how many stools can a carpenter make?

    asked on November 9, 2010
  99. Math

    At the end of each quarter, a 50-year-old woman puts $3000 in a retirement account that pays 5% interest compounded quarterly. When she reaches 60, she withdraws the entire amount and places it in a mutual fund that pays 6.9% interest compounded monthly.

    asked on November 7, 2010
  100. chemistry

    write the formula of the conjugate acid for base H2PO

    asked on October 17, 2010


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