Questions Asked on
October 29, 2016

  1. math

    Julia paddleboat travels 2km/h in stilll water. The boat is paddled 4km down stream in the same time it takes to go 1km upstream what is the speed of the river. Please help and show all work I suck at story problems haha

    asked by madison
  2. Statistics

    The Townville Parks Department has just installed 1900 new lightbulbs with an expected mean lifespan of 75 months and a lifespan standard deviation of 12 months. Assuming normally distributed bulb failure, how many bulbs will need to be replaced after 53

    asked by Jen
  3. physics

    Calculate the magnitude of the force FM required of the "deltoid" muscle to hold up the outstretched arm shown in the figure below. The total mass of the arm is 2.8 kg and θ = 11°. d=12cm D=24cm

    asked by Rpbert
  4. Math Help

    Let A={2, 4, 6, 8} and B={2, 3, 5, 7, 9}. Compute n(A). ​ 17 14 5 8 4 1 Please help thank you

    asked by Kal Jay
  5. chem

    how many atoms are there in 0.0300 mole of methane molecules?

    asked by john
  6. Chemistry

    Consider the following reaction. CaSO4(s) reverse reaction arrow Ca2+(aq) + SO42-(aq) At 25°C the equilibrium constant is Kc = 2.4x10^-5 for this reaction. (a) If excess CaSO4(s) is mixed with water at 25°C to produce a saturated solution of CaSO4, what

    asked by Anonymous
  7. management

    examine the impact of one's family background and setting to work place behaviour?

    asked by George
  8. Chemistry

    What mass of Cu(IO3)2 can be formed from 0.690g of CuSO4-5H2O?

    asked by Anonymous
  9. math

    the acceleration of an object varies directly as the force f exerted and inversely as its mass m. if the constant of variation is 1 find the acceleration in meters/second^ of a 10 kg object exerting force of 10 newtons

    asked by iramae
  10. Physics

    The wheels of a skateboard roll without slipping as it accelerates at 0.45 m/s2 down an 75-m-long hill. If the skateboarder travels at 1.8 m/s at the top of the hill, what is the average angular speed of the 2.6-cm-radius whe els during the entire trip

    asked by Anonymous
  11. Physics

    State the reason why a steel sphere resting on a horizontal surface is said to be in neutral equilibrium.

    asked by Aliy
  12. Physics

    A balloon is filled with a gas which is lighter than air.it is observed to rise in a air upto a certain height. State a reason why the balloon stops rising.

    asked by Aliy
  13. Math probability

    There are 6 gray socks,8 brown socks and 2 blue socks in a drawer.If you remove 2 socks without looking,what is the probability that they are both blue?

    asked by Chase
  14. math

    i have only 8 digits and each one is the same. The number that follows me has 9 digits. Who am i?

    asked by jabulile
  15. Maths

    Solve Simultaneous Equetion Using Elimination Method: (A)2x - 3y= -3 and 3x - 7y= -1.

    asked by Martin
  16. math

    Truck A can carry 70% more dirt than truck B in the same amount of time. Together both trucks take 6 hours to finish a job. Working at this rate, how many hours would it take truck B to finish the same job?

    asked by Oben
  17. Math

    A defective clock is set correctly at 12 nn.However it registers only fifteen mins. for each hr.In how many hr.will it again register the correct time?

    asked by Chase
  18. Math's

    Out of 2 dozen orenges.16 were eaten. what fraction of the oranges were eaten?

    asked by Shiva
  19. thermodynamics

    what is enthalpy of pure ethly alcohol at 1atm?

    asked by bob
  20. Math

    A sausage sample was found to contain 65% moisture, based on fresh weight. The sausage was dried in an oven until its moisture content was 10%. A 2.0 g portion of the dried sausage was extracted with the Soxhlet method to determine the amount of crude fat.

    asked by James
  21. English

    1. I don't know. + Who is she? 2. I don't know who she is. 3. I don't know who is she. -------------------------------- #1 can be changed into #2 or #3. Is #3 grammatical? ================================ 4. I know. + What makes you think so? 5. I know

    asked by rfvv
  22. maths

    Write down all factors of 18 and 24

    asked by Owain
  23. English

    1. We will always wait for you right here on this island where Koreans have lived for a long time. -------------------------- What is the antecedent of the where clause? a. this island b. right here on this island c. right here ============================

    asked by rfvv
  24. math

    each day Ashley practices free throws. The first day she takes 12 shots, and every day after she takes 2 more than the previous day. How many free throws will she shoot on the 6th day. Thank you. =)

    asked by Aleah
  25. Maths

    Two cars travel towards each other on a 400 km stretch of road. One car travels 90 km/h and the other at 70 km/h. How long does it take before they pass each other

    asked by Jim
  26. English

    1. This is a picture of Tom. 2. This is a picture of Tom's. -------------------------------- Does #1 mean as follows? Tom is in this picture. Does #2 mean as follows? This picture is Tom's. This is a picture which Tom has taken. This picture belongs to

    asked by rfvv
  27. math

    Hospitals contain backup generators in case of power failure. A hospital has two backup generators each of which has a 2% probability of failure. Only one generator is needed to supply emergency power. What is the probability that the backup system will

    asked by Anonymous
  28. math

    A manufacturer of calculators would like to separate defective calculators from calculators that are acceptable. Through an error, a shipment of twelve calculators is sent out containing three defective calculators and nine working calculators. A customer

    asked by Anonymous
  29. English

    1. Dokdo was first recorded as part of Korea in the 500s. 2. Dokdo was first recorded as a part of Korea in the 500s. -------------------------- Can we use both expressions, 'part of' and 'a part of'?

    asked by rfvv
  30. Math

    Prove that angle a is equal to angle E if angle D is equal to angle c Science I can't put the picture of the triangle I will try and explain it Two triangles that connect on one angle >< like this but a triangle and the angle in the middle ^ ( the angle

    asked by Ali
  31. Math

    At a speed of 15 revolutions per min.,how long will it take a wheel of radius 14 in.,rolling on its edge to travel 440 ft.

    asked by Chase
  32. Math

    A quadrilateral has the following vertices: A(-2;4) B(-4-2) C(4;-3) D(2;1).Determine the coordinates of the enlarged image if the scale factor = 2

    asked by Kwanele
  33. Philosophy

    We may observe, that there is no species of reasoning more common, more useful, and even necessary to human life, than that which is derived from the testimony of men, and the reports of eye-witnesses and spectators. This species of reasoning, perhaps, one

    asked by Stag
  34. physics

    A variable-speed drill, initially turning at 150 rpm, speeds up to 1300 rpm in a time interval of 1.0 s. What is its average rotational acceleration? ----- rpm/s2

    asked by Carly D
  35. Physics

    A Bomber On A Military Mission Is Flying Horizontaly At A Height Of 3000m above the ground at 60km/min,it drops a bomb on a target on the ground,determine the acute angle between the vertical and the line joining the bomber and the target at the instant

    asked by Ola
  36. math

    A defective clock is set correctly at 12 nn.However it registers only fifteen mins. for each hr.In how many hr.will it again register the correct time?

    asked by iselle
  37. English

    1. I found it convenient to drive a car. 2. I found it convenient that I drive a car. 3. I make it a rule to get up at six. 4. I make it a rule that I get up at six. 5. I believe it useful to buy things on the Internet. 6. I believe it useful that we buy

    asked by rfvv
  38. English

    1. I found it necessary that we should try to memorize the passage. 2. I found it necessary to memorize the passage. 3. I made it a rule that I have to brush teeth after eating. 4. I made it a rule to brush teeth after eating. 5. I believe it true that I

    asked by rfvv
  39. Algebra

    The sum of a number and 10 is -10

    asked by Cynthia
  40. history/presidents

    How many presidential elections has it been since 1936 when Franklin D. Roosevelt was reelected. I believe it's 20, but some of the sites seem to have different answers.

    asked by Ginger
  41. math

    At a sports festival half the number of people that chose basketball, chose football. The number of students who chose basketball was a quarter the number of students who chose baseball. There were 84 more students who chose baseball than soccer. How many

    asked by andrew
  42. Chemistry

    A 1.00Lgas sample at 1.00degree celsius and 600torr contain 50.0%helium and 50.0%xenon by mass. What are the partial pressure of the individual gasses?

    asked by Tiangaydonzo
  43. mtap

    There were 42 mangoes in each crate. Twelve such crates of mangoes were delivered to a factory. Four mangoes were rotten and had to be thrown away. The remaining mangoes were packed into boxes of10 mangoes each. How many boxes of mangoes were there?

    asked by french
  44. math

    Find the value of K so that x^2-5x+k=0 has one root equal to 4.

    asked by Math
  45. math

    You are writing multiple choice test. Each question has 5 choices, only one of which is correct. You have no idea how to answer three questions. What is the probability that you will get all three of these questions correct if you guess the answers? Please

    asked by Anonymous
  46. math

    If a dark-haired mother and father have a particular type of gene than the probability that any child that they have will be light-haired is 0.25. What is the probability that all three children will have light hair? Thanks.

    asked by Anonymous
  47. Algebra 2

    Express log A in terms of the 2 logarithms of prime numbers: A= (sqrt(3)*sqrt4(125))/7^3

    asked by Anonymous
  48. PLease Help Math Sets

    The 130 consumers were asked about their buying preferences concerning another product that is sold in the market under three labels. The results were 12 buy only those sold under label A. 24 buy only those sold under label B. 27 buy only those sold under

    asked by Kal Jay
  49. Science chemistry

    Does hydrogen borate conduct electricity? We were told to search this up but I can't find it online and my class never did a lab on it.

    asked by Zubaida
  50. Science chemistry

    Also. If you are given the conductivity of an unknown chemical, what the blue and red litmus paper change into when you check the chemical. And the pH level and solution type. How do you know the solution name and formula? I never learned how to find the

    asked by Zubaida
  51. Math

    The country hall charges a rental fee of $1000 and at least $3000 for food. Olivi is planning a class reunion. If she had chosen a buffet that costs $38.56 per person what is the minimum possible number of people who must attend to support the expense?

    asked by Sierra
  52. Sets

    Let A, B, and C be subsets of a universal set U and suppose n(U)=100, n(A)=30, n(B)=30, n(C)=32, n(A∩B)=9, n(A∩C)=10, n(B∩C)=14, and n(A∩B∩C)=5. ​ Compute n(Ac∩Bc∩Cc) c. 70 64 39 14 10 89 I dont understand this. Please help. Thank you.

    asked by Kal Jay
  53. Science chemistry

    Also. If you are given the conductivity of an unknown chemical, what the blue and red litmus paper change into when you check the chemical. And the pH level and solution type. How do you know the solution name and formula? I never learned how to find the

    asked by Zubaida
  54. Please explain (Math)

    Let A and B be subsets of a universal set U and suppose n(U)=210, n(A)=100, n(B)=60, and n(A∩B)=30. Compute n(Ac∩Bc). 80 150 100 90 180 200 Please help. Thank you

    asked by Kal Jay
  55. Math

    A radioactive material has a half life of 500 years. A) Given 20 grams of this material, how much will remain after 1,000 years? B) Given 100 grams of this material, how much will remain after 750 years? Thank you to whom ever can help me :)

    asked by Milly
  56. Math

    Mr. Abernathy purchased a selection of wrenches for his shop. The total cost was $78. He bought the same number of $1.50 and $2.50 wrenches, and half that many $4 wrenches. The number of $3 wrenches was one more than the number of $4 wrenches. How many of

    asked by Anoymous
  57. English

    Hi, I really need help on two questions for the novel called 'In the heat of the night! Here's the questions btw its chapter three In the chapter 1 and 2, the racial issue has been hinted. Now we sees clear indication that this issue will be a major item

    asked by Sarah Smiuth
  58. Englush

    Hi again, I have another question for the novel 'in the heat of the night' for chapter three. Here it is , Give the significance of the following, 'That's what he's got a shirttail for.' 'Like I said, Virgil, we know our business down here. Go home.' if

    asked by Sarah Smiuth
  59. Chemistry

    102.0 MHz (typical frequency for FM radio broadcasting) Express your answer using four significant figures.

    asked by Chelsea
  60. Chemistry

    Does group 18 elements soluble in organic solvents such as tetra-chloro-methane or alcohol

    asked by Husler
  61. physics

    A ham sandwich consists of one slice of ham (9 grams) and two slices of bread (25 grams each). You have 1 kg of ham and 1.2 kg of bread. You make as many sandwiches as you can. How many sandwiches did you make? 1) How many sandwiches did you makd? 2) What

    asked by Lisa
  62. physics

    Given that 1 g of hydrogen combines completely with 8 g of oxygen to form water, how much water can you make with 10 g of hydrogen and 24 g of oxygen?

    asked by Beth
  63. Trigonometry

    The angle of depression from the top of a lighthouse across the street is 65 degrees. the angle of depression from the top of the lighthouse to the top of a house is 28 degrees. the distance from the lighthouse to the house is 37 feet. what is the height

    asked by Lilly
  64. Physics

    Given the following about a spring: mass = 20.0 kg height initial = 5.25 m (above the ground) height final = 2.17 m (above the ground with the mass attached) delta y initial = 0.00 m There are several questions I must answer from this. 1. What is the value

    asked by George
  65. Math

    Ron is tiling a countertop. He needs a place 54 squarrs tiles in each of the 8 rows to cover the counter. He wantd to randomly place 8 groups of 4 blue tiles and have the rest of the tiles be white. How many white tiles will Ron need?

    asked by Charissa
  66. Math

    Ashley made an pie with a diameter of 25 cm. She cuts the pie into 6 equal slices. What is the area of each pie?

    asked by Ashley
  67. 1 MATH QUESTION

    When using the midpoint formula, what is different between a number line and a coordinate plane?

    asked by Anonymous
  68. Statistics

    The Citiburg Parks Department has just installed 1100 new lightbulbs with an expected mean lifespan of 64 months and a lifespan standard deviation of 8 months. Assuming normally distributed bulb failure, how many bulbs will need to be replaced after 49

    asked by Jen
  69. Math

    A professor at a school of Architecture designed an asymmetrical​ A-frame house pictured below. The included angle between sides AB and​ CB, which measure 30.96 ft and 17.78 ​ft, respectively, measures 67 degrees. Find the length of side AC.

    asked by MAT
  70. physics

    What is true about microscopic properties of an object? 1) They are just small versions of the macroscopic properties. 2) They are the properties of particles that make up the object. 3) They are the average of many properties of individual particles. 4)

    asked by Heather
  71. Science

    Identifying the cause of any problems in a design is called____.

    asked by Anonymous
  72. Calculus

    Determine an upper/lower estimate for the area under the curve f(x) = cos x between x = 0 and x = pi/2 . Show how you arrive at this estimate. This is the question that my teacher wanted us to answer and I'm not sure how to even start the process. Should I

    asked by Mia
  73. math

    Dan fenced a rectangular piece of land measuring 15 m and 31 m. He used six strands of wire, leaving a space of 5 m for the gate. What was the total length of the wire used?

    asked by kgk
  74. Science

    Identifying the cause of any problems in a design is called _____. A. Patenting B. Brainstorming C. Prototyping D. Troubleshooting is the answer D?

    asked by Anonymous
  75. Math

    A marine surveyor uses a rangefinder and a compass to locate a ship and an island in the vicinity of the coast on which she stands. The rangefinder indicates that the island is 379 ft from her position and the ship is 600 ft from her position. Using the​

    asked by jose
  76. physics

    A volume of 140 cm3 of an ideal gas has an initial temperature of 20°C and an initial pressure of 1 atm. What is the final pressure if the volume is reduced to 120 cm3 and the temperature is raised to 40°C?

    asked by Sue
  77. Math REALLY NEED HELP

    1. nineteen thousand, one hundred forty-two millionths was the first guess. the second guess was eight thousand, five hundred forty-one hundred-thousandths. which was greater and by how much? 2. They were happy because 80 of the people could be seated

    asked by Deathfromabove
  78. Math

    A runner competes in a 6 mile race. The year befoere her speed was 3mph slower and it took her one hour longer. What was her speed this year. Please help me by showing all work, Thank you

    asked by Carol
  79. Chemistry

    To what volume must 10ml of 5M HCl be diluted to make a 0.5M HCl solution......???? A.1ml B.50ml C.100ml D.500ml E.1000ml

    asked by Sawera
  80. Math

    1. Determine the total number of arrangements of three or four toys from a basket of eight different toys.

    asked by Instantaneous
  81. Discrete Math

    In roulette, a wheel with 38 numbers is spun. Of these, 18 are red, 18 are black, and 2 are green. The probability that when the wheel is spun it lands on any particular number is 1/38. a) What is the probability that the wheel lands on a red number? b)

    asked by Christopher
  82. Science

    Identifying the cause of any problems in a design is called _____. A. Patenting B. Brainstorming C. Prototyping D. Troubleshooting is the answer D?

    asked by Anonymous
  83. algebra 1

    Susie wants to have at least a 90 average for the year in her Algebra class. Her current test scores are 85, 100, 86, and 97. What does she need to score on her fifth test to have at least a 90 average?

    asked by Grace
  84. Science

    Cost is an example of _____ in designing a product. A. a constraint B. a solution C. a trade-off D. an idea is the answer A?

    asked by Anonymous
  85. Math

    Half of the product of three numbers

    asked by Mayaad
  86. math

    When a situation can be modeled by a linear equation, what information do you need in order to find an equation?

    asked by Carly
  87. Computer Science, Hardware

    1.) If each stage is 1 clock cycle, calculate the number of clock cycles to execute a code stream of 10 instructions in a non-pipelined (i.e. sequential) fashion? 2.) Repeat part 1, assuming the instructions are executed in a pipelined fashion. Would this

    asked by Dio
  88. math

    The number has 6 digits. The nuber is less than 300000. 10 is a factor of the number. The hundred thousands and ten thousands digit are the same and are odd. The tens digit is a cube number and is one more than the thousands digit. The sum of the hundreds

    asked by sania
  89. Chemistry

    The specific rotation of pure enantiomer is known from the literature to be -20. The measured value of a solution containing A plus its enantiomer B (specific rotation must be +20) is -40. What is the ee (enantiomer excess) of this sample?

    asked by Sarah
  90. math

    Find the values of the trigonometric functions of t from the given information. tan(t) =1/9 terminal point of t is in Quadrant III sin(t)= cos(t)= csc(t)= sec(t)= cot(t)=

    asked by Z
  91. math

    An airplane leaves Atlanta at 2 PM and flies north at 250 miles per hour. A second airplane leaves Atlanta 30 minutes later and flies north at 280 miles per hour. At what time will the second airplane overtake the first? Answer Choices 6:20 PM 6:00 PM 6:40

    asked by Zara
  92. math

    Three bells toll at intervals of 8 minutes, 15 minutes and 24 minutes respectively. If they toll together at 3 p.m, at what time will they next toll together again?

    asked by Anonymous
  93. Chemistry-Dr.Bob

    The specific rotation of pure enantiomer is known from the literature to be -20. The measured value of a solution containing A plus its enantiomer B (specific rotation must be +20) is -40. What is the ee (enantiomer excess) of this sample?

    asked by Sarah
  94. maths

    A bus traveled from LA to CA. It covered 115 km in the first one and a half hour and the remaining 95 km in two and a half hour. What was the average speed in km/h for the whole trip?

    asked by Eno
  95. Physics

    Given the following about a spring: mass = 20.0 kg height initial = 5.25 m (above the ground) height final = 2.17 m (above the ground with the mass attached) delta y initial = 0.00 m There are several questions I must answer from this. 1. What is the value

    asked by George
  96. Art

    Hundertwasser who was born in December15, 1928 in Austria and died in February19, 2000. What do you think about characteristics of his work?

    asked by Jo
  97. Finance

    You want to have $2million in real dollars in an account when you retire in 43 years. The nominal return on your investment in 9.939% and the inflation rate is 3.2%. What is the real amount you must deposit each year to achieve this goal?

    asked by VicG
  98. Calc

    Use upper and lower sums to approximate the area of the region using the given number of subintervals (of equal width). (Round your answers to three decimal places.) y = 5/x

    asked by Kelly
  99. Math Compound Interest

    If $500 is invested at an interest rate of 4.5% per year, find the amount of the investment at the end of 11 years for the following compounding methods. (Round your answers to the nearest cent.) Find a, Anually Find b, SemiAnually Find c, Quarterly Find

    asked by NHick
  100. Calculus

    Use the limit process to find the area of the region between the graph of the function and the y-axis over the given y-interval. f(y) = 7y, 0 ≤ y ≤ 2

    asked by Matt
  101. Calc

    Use the limit process to find the area of the region between the graph of the function and the x-axis over the given interval. y = −4x + 6, [0, 1]

    asked by Jenna
  102. Math

    Find the area of a path 2 metres wide built around a rectangular pool 10m by 4m.

    asked by Anonymous
  103. Math

    2 water tanks are being set up.Each one starts with 100 liters of water.The first tank fills at the rate of 15 liters per min.The second tank fills at the rate of 20 liters per min.When will the first tank contain 7/3 as much as the second tank?

    asked by Chase