Questions and responses by Anonymous, page 11
  1. Maths

    Boy lost 0.3 of his marbles . He has 77 left . How many did he start with?

    asked on September 18, 2016
  2. Math

    What are the missing numbers between 10 22 34 46 58 on the number line

    asked on September 8, 2016
  3. agebra

    The graph represents the normal distribution of recorded weights, in pounds, of cats at a veterinary clinic. Which weights are within 2 standard deviations of the mean? Check all that apply.

    asked on July 12, 2016
  4. advanced alh

    The number of hours that college students sleep on a week night is approximated by a normal curve with a mean of 7 hours and a standard deviation of 1.7 hours. Answer the question below using a z table: About what proportion of students sleep less than 5

    asked on June 3, 2016
  5. CHECK my drivers ed answers

    1. Searching for other roadway users includes identifying (1 point) only those in motor vehicles. signs, signals, and roadway markings. users of different sizes and shapes. the characteristics of the roadway.**** 2. What is the Zone Control System? (1

    asked on May 11, 2016
  6. History

    How did the notion of the freedom of contract create opportunities and constraints on liberty?

    asked on March 30, 2016
  7. Math

    Suppose that the amount of time it takes to build a highway varies directly with the length of the highway and inversely with the number of workers. Suppose also that it takes 100 workers 6 weeks to build 4 miles of highway. How long will it take 160

    asked on March 11, 2016
  8. Algebra

    A college football coach wants to know if the is a correlation between his players' leg strength and the time it takes for them to sprint 40 yards. he sets up the following test and records the data: Every day for a week, he counts how many times each

    asked on November 17, 2015
  9. College Physics

    A student throws a 140 g snowball at 7.5 m/s at the side of the schoolhouse, where it hits and sticks. What is the magnitude of the average force on the wall if the duration of the collision is 0.19 s ?

    asked on October 23, 2015
  10. Math

    A card is randomly drawn from a standard $52$-card deck. An ace of hearts wins the grand prize; any other ace or heart wins a small prize. What is the probability of winning a small prize? Express your answer as a common fraction. Assume that a grand prize

    asked on August 10, 2015
  11. calculus

    The rate of decay in the mass, M, of a radioactive substance is given by the differential equation dM dt equals negative 1 times k times M, where k is a positive constant. If the initial mass was 100g, then find the expression for the mass, M, at any time

    asked on July 17, 2015
  12. Chemistry

    Zn + 2 HCl = H2 + ZnCl2 / When 25.0 g of Zn reacts, how many L of H2 gas are formed at 25 degrees Celsius and a pressure of 854 mmHg?

    asked on May 6, 2015
  13. Accounting

    DeWeese Corporation issues $400,000 of 8%, 5-year bonds on January 1, 2015, at 105. Assuming that the straight-line method is used to amortize the premium, what is the total amount of interest expense for 2015?

    asked on April 27, 2015
  14. math

    Which number is not equal to one of the following expressions? 0.6038 x 1000 603.8 -: 10 60.38 -: 100 0.6038 603.8 60.38 6.038

    asked on April 14, 2015
  15. physics

    You begin pushing the car forward from rest. Assume that your car has a mass of 809 kg. Neglecting friction, how long will it take you to push your car up to a speed of 3.93 m/s on a level surface if you exert a constant force of 218 N on it?

    asked on February 19, 2015
  16. physics

    You drop a rock into a deep well and 4.1s later hear the splash. How far down is the water? Neglect the travel time of the sound. Express your answer using two significant figures.

    asked on January 25, 2015
  17. Science

    50 ml of ethyl alcohol amd 40ml of water combined in a beaker add up to 90ml of liquid why is this? (Particle theory)

    asked on November 20, 2014
  18. statistics

    The Office of Student Services at a large western state university maintains information on the study habits of its full-time students. Their studies indicate that the mean amount of time undergraduate students study per week is 20 hours. The hours studied

    asked on October 12, 2014
  19. statistic

    A “Set” within quantitative theory represents…?

    asked on October 4, 2014
  20. c

    A hose can fill a swimming pool in 4 hours. Another hose needs 9 more hours to fill the pool than the two hoses combined. How long would it take the second hose to fill the pool?

    asked on September 16, 2014
  21. compound interest

    At the beginning of every year, Molly deposits $200 in a savings account that offers an interest rate of 20%, compounded annually. The total amount that Molly will have in her account at the end of 3 years is

    asked on August 26, 2014
  22. chemistry

    A solution contains 72.0 g of HCl and 468 g of (C6H6). What is the mole fraction of benzene?

    asked on June 19, 2014
  23. calculus

    A golf ball is hit off the top of a cliff that is 75 feet tall at an angle of 45° to the horizontal with an initial velocity of 80 feet per second. The quadratic equation shown below models the height, h(x), of the ball when it is x feet from the

    asked on May 28, 2014
  24. Statistics

    Selecting a letter of the alphabet: If 3 letters of the alphabet are selected at random, find the probability of getting at least one letter "x". Letters can be used more than once. My answer was: P(at least 1 "x) = 1 - (25/26)^3 = 1951/17576 or 0.11 Is

    asked on February 21, 2014
  25. english

    In which sentence is the underlined phrase a prepositional phrase functioning as an adjective? She went to boarding school in Coventry. My sister was born in Chicago. Her grades gave my sister a place in the top rank of her class. My sister moved away in

    asked on January 24, 2014
  26. Solar Energy Help ASAP

    Below you see a plot of an ideal and a non-ideal JV curve. Based on this plot and assuming an irradiance of 1000W/m2, give approximately the numerical values to the questions bellow: I. Estimate the ideal Fill Factor (in %): II. Estimate the non-ideal Fill

    asked on October 17, 2013
  27. Solar Energy Help ASAP

    Let's assume that solar light reaches a silicon solar cell with an angle of incidence of θi=0o. For simplicity, let's consider the refractive index of silicon to be nSi=3.5. The refractive index of air is nair=1. What percentage of light would be lost due

    asked on October 17, 2013
  28. AP Chemistry

    Consider the reaction 2 Al2O3(s) ! 4 Al(s) + 3 O2(g) . H = +3339.6 kJ/mol What is the change in heat when 0.455 L of a 3.60 M Al solution reacts with excess O2 ? 1. -424 kJ 2. -2735 kJ 3. -1695 kJ 4. -1368 kJ 5. -26,521 kJ 6. -21,962 kJ 7. -685 kJ 8.

    asked on September 29, 2013
  29. math

    A newly-opened restaurant has 5 menu items. If the first 4 customers each choose one menu item uniformly at random, the probability that the 4th customer orders a previously unordered item is a/b, where a and b are relatively prime positive integers. What

    asked on July 1, 2013
  30. physics

    We are given an input current Iin=100μA and a linear resistive load represented by the resistor RL . Our resistive load is not regulated for the high current provided by our current source, so we add a resistor RS in parallel to divide the current such

    asked on March 27, 2013
  31. physics

    A toy train rolls around a horizontal 1.0-{\rm m}-diameter track. The coefficient of rolling friction is 0.15. What is the magnitude of the train's angular acceleration after it is released?

    asked on March 9, 2013
  32. maths-urgently needed

    In right angled triangle ABC angle B=90 degree and AB= root 34 unit. The coordinates of point B and Care (4,2)and (-1,y) respectively. If area of triangle ABC = 17 sq.units, then find value of y.

    asked on February 12, 2013
  33. chemistry

    Suppose we want to charge a flask with 1.9 g of sugar. We put the empty flask on a balance and it is determined to weigh 170 g. Enter the weight we would expect to see on the balance when we're done adding the sugar.

    asked on January 9, 2013
  34. Physics

    A block slides from rest with negligible friction down a track, descending 5.0m to point P at the bottom. It then slides on the horizontal surface. The coefficient of friction between the block and the horizontal surface is 0.20. How far does the block

    asked on December 29, 2012
  35. maths --plse help me..

    a rectangle with perimeter 44 cm is divided into 5 congruent triangles as shown in the figure. what will be the perimeter of each of the congruent triangle?

    asked on December 15, 2012
  36. physics

    A simple pendulum consists of a ball connected to one end of a thin brass wire. The period of the pendulum is 2.0000 s. The temperature rises by 149° C, and the length of the wire increases. Determine the period of the heated pendulum

    asked on December 11, 2012
  37. physics

    (a) daredevil is attempting to jump his motorcycle over a line of buses parked end to end by driving up a 32° ramp at a speed of 4-0.0 m/s (14-4- km/h), How many buses can he clear if the top of the takeoff ramp is at the same height as the bus tops and

    asked on September 6, 2012
  38. Math

    What is the most probable next number in this list? 12, 1, 1, 1, 2, 1, 3

    asked on August 27, 2012
  39. acc 100

    Metzger Company compiled the following financial information as of December 31, 2010: Revenues $140,000 Metzger, Capital (1/1/10) 70,000 Equipment 40,000 Expenses 125,000 Cash 35,000 Metzger, Drawings 10,000 Supplies 5,000 Accounts payable 20,000 Accounts

    asked on April 24, 2012
  40. sociology

    There are 35 cars backed up at the intersection because of an accident. Which sociological term best describes these 35 drivers?

    asked on February 2, 2012
  41. Calculus

    Evaluate the integral by interpreting it in terms of areas. In other words, draw a picture of the region the integral represents, and find the area using high school geometry. interval 0 to 11 |3x-15|dx

    asked on November 17, 2011
  42. Calculus

    A stone is dropped from the edge of a roof, and hits the ground with a velocity of -195 feet per second. How high is the roof? .

    asked on November 14, 2011
  43. Physics (4)

    A 4.0-kg particle is moving horizontally with a speed of 5.0 m/s when it strikes a vertical wall. The particle rebounds with a speed of 3.0 m/s. What is the magnitude of the impulse delivered to the particle?

    asked on October 29, 2011
  44. General Physics I

    An antelope moving with constant acceleration covers the distance between two points 70.0 m apart in 7.00 s. Its speed as it passes the second point is 15.0 m/s. (a) What is its speed at the first point? (b) What is its acceleration?

    asked on October 12, 2010
  45. chemistry

    which of the following molecules is polar? NO2 CO2 BF3 SF6 CCl4

    asked on July 11, 2010
  46. discrete probability distribution (help please!)

    a machine has 7 identical components which function independently. the probability that a component will fail is 0.2. the machine will stop working if more than three components fail. find the probability that the machine will be working.

    asked on April 12, 2010
  47. Physics

    Four point charges are positioned on the rim of a circle. The charge on each of the four is +0.5 µC, +1.5 µC, -1.0 µC, and -0.5 µC. If the electrical potential at the center of the circle due to the +0.5 µC charge alone is 4.5 104 V, what is the total

    asked on January 29, 2010
  48. Chemistry

    A sample of H2 gas (12.28 g) occupies 100.0 L at 400.0 K and 2.00 atm. How much volume will a 9.49 g sample of H2 occupy at 353 K and 2.00 atm? a. 68.2 L b. 54.7 L c. 147 L d. 109 L e.77.3 L Is it a. 68.2 L?

    asked on January 3, 2010
  49. physics - please help

    A golf ball of mass 0.045 kg is hit off the tee at a speed of 48 m/s. The golf club was in contact with the ball for 5.4 10-3 s. (a) Find the magnitude of the impulse imparted to the golf ball. (b) Find the magnitude of the average force exerted on the

    asked on December 9, 2009
  50. Physics

    Uniform Circular Motion: Suppose that a particle's position is given by the following expression: r(t) = Rcos(omega*t)i + Rsin(omega*t)j 1. Choose the answer that best completes the following sentence: The particle's motion at t=0 can be described by

    asked on October 4, 2009
  51. PHYSICS - plz help

    A house painter uses a chair and pulley arrangement to lift himself up the side of a house. The painter's mass is 69.2 kg and the chair's mass is 24.0 kg. With what force must he pull down on the rope in order to accelerate upward at 0.379 m/s2? The rope

    asked on October 2, 2009
  52. Chemistry

    Write formula equations and net ionic equations for the hydrolysis of the following salts in water. a. sodium carbonate b. ammonium bromide I don't know what the products should be. a. Na2CO3+H2O--> ? b. NH4Br+H2O--> ? Please help me with this. I really

    asked on April 24, 2009
  53. physics

    charge +2micro coulomb is placed at a pointA(2,1,0). another charge-3 microcoulomb placed at B(4,2,-1). find the net force on charge +5micro coulomb placed at a point C(-1,3,2)

    asked on June 30, 2020
  54. Calculus

    How do I find the unit tangent vector with what I have x =2cos(t) , y=2sin(t), z =2t The formula is T(t)=r'(t)/lr'(t)l. Show steps so I know.

    asked on June 26, 2020
  55. MATH

    How many lines through the origin make angles of 60degree with both the +y and +z axes ? What angle do they make with the +x axis ?

    asked on June 13, 2020
  56. Chem

    Wavelength of light emitted depends directly on: A The quantity of energy absorbed by an electron. B The specific element the electron belongs to. C The quantity of energy released by an electron. D All of the above D?

    asked on June 11, 2020
  57. Physics

    You and your bicycle have combined mass 80.0kg.When you reach the base of the bridge, you are travelling along the road at 5.00m/s. (See figure below). At the top of the bridge, you have climbed a vertical distance of 5.20m and have slowed to 1.50m/s. You

    asked on June 8, 2020
  58. Math

    Compute the sum\[ (a +(2n+1)d)^2- (a + (2n)d)^2 +(a + (2n-1)d)^2 - (a+(2n-2)d)^2 + \cdots + (a+d)^2 - a^2.\]

    asked on March 24, 2020
  59. Physics

    For an ideal fluid flowing through a horizontal pipe, Bernoulli's principle and the continuity equation state that the pressure within the pipe does which of the following? Pressure descreased pipe diameter increase?

    asked on February 5, 2020
  60. Math

    The area of a square living room is 256 ft2. Which is the length of the room?

    asked on November 18, 2019
  61. calculus

    Does the function satisfy the hypotheses of the Mean Value Theorem on the given interval? f(x) = x3 + x − 9, [0, 2]

    asked on July 29, 2019
  62. English

    In the excerpt of Night, by Elie Wiesel, he mentioned that his foot was "bad". What reason does the text give for this?

    asked on July 29, 2019
  63. Physics

    A brick is thrown upward from the top of a building at an angle of 25° to the horizontal and with an initial speed of 15m/s. If the brick is in the flightfor 3.0 s, how tall is the building?

    asked on July 10, 2019
  64. Math

    Write and simplify the polynomial represented by the model. polynomial blocks A. –2x2 + 2x + 3 B. 2x2 – 2x – 3 C. 3x2 – 2x – 3 D. 2x2 – 2x + 3

    asked on May 22, 2019
  65. History

    Which of the following were actions that motivated Radical Republicans to seek the impeachment of President Johnson? Choose all that apply. A. President Johnson encouraged former Confederate states to reject the Fourteenth Amendment. B. President Johnson

    asked on January 29, 2019
  66. Chemistry

    Calculate the number of moles of magnesium chloride produced by reacting 168g of magnesium trioxocarbonate (IV) with excess hydrochloric acid Mg=24,C=12,O=16,H=1,CL=35.5

    asked on September 30, 2018
  67. Psychology

    1. Behavioral therapy began with _______________. (1 point) Ivan Pavlov B.F. Skinner John Watson*** Erik Erikson Read the statement. Choose the correct answer. 2. Watson is most (in)famous for performing experiments on ______________. (1 point) A baby*** a

    asked on May 23, 2018
  68. American history

    Which pull factor would most likely encourage an immigrant who wanted to raise and sell cattle in the United States?

    asked on May 3, 2018
  69. Algebra

    Write y=1/6x+4 in standard form using integers. Help?

    asked on November 28, 2017
  70. Algebra

    Max has been offered positions by two car companies. The first company pays a salary of $12,500 plus commission of $750 for each car sold. The second company pays a salary of $22,500 plus a commission of $250 per car sold. How many cars would need to be

    asked on September 19, 2017
  71. statistic

    A new car was put into production. It involved many assembly tasks. Each car was inspected at the end of the assembly line and the number of defects per unit was recorded. For the first 100 cars produced, there were 40 defective cars. Some of the cars had

    asked on July 7, 2017
  72. Calculus

    The slope of the tangent line to a curve at any point (x, y) on the curve is x divided by y. What is the equation of the curve if (2, 1) is a point on the curve?

    asked on April 28, 2017
  73. Chemistry

    The reaction, N2O5 = 2NO2+1/2O2 is first order in N2O5 with rate constant 6.2 x 10^-4 s^-1. What is the value of rate of reaction when [N2O5] = 1.25 mol L^-1 s^-1 ?

    asked on April 26, 2017
  74. Calculus

    All edges of a cube are expanding at a rate of 8 centimeters per second. (a) How fast is the volume changing when each edge is 4 cm? (b) How fast is the volume changing when each edge is 10 cm? Kind of confused... V = x^3 dx/dt = 8 dV/dt = 3x^2 dx/dt (a)

    asked on March 7, 2017
  75. bearings

    PQRS are four locations on the same horizontal plane Q is an bearing of 041 degree from P and the distance is 40km,S is 28km from R on a bearing 074 degree, R is directly due north of P and the distant between Q and R is 38km. Find to the nearest whole

    asked on January 13, 2017
  76. physics

    A small tiny nail may Pierce an inflated Tyre and remain there without pressure reduction.explain

    asked on January 4, 2017
  77. Really Need Help Please

    A certain virus infects one in every 200 people. A test used to detect the virus in a person is positive 90% of the time if the person has the virus and 10% of the time if the person does not have the virus. (This 10% result is called a false positive.)

    asked on December 16, 2016
  78. english

    None of the students ________ happy with the instructor because she ________ homework every weekend.

    asked on October 28, 2016
  79. Language

    Which words can be used to describe Jonas's father

    asked on June 23, 2016
  80. Chemistry

    A compound contains 69.9% iron and 30.1% oxygen. What is its empirical formula?

    asked on January 14, 2016
  81. Math

    1. Write the ratio in the simplest form. 50:10 (a) 25:5 (b) 10:2 (C) 5:1* (D) 1:5 2. Solve the following proportion. p/6=7/8 (a) p=5.25 (b) p=8 (c) p=10.5* (d) p=42 3. Chris's uncle has a model car. The model is 6 inches long and 3 inches wide. The actual

    asked on November 15, 2015
  82. Chemistry (Check)

    6.3 mg of a boron hydride is contained in a flask of 385 mL at 25. degrees C and a pressure of 11 Torr. A. determine the molar mass of the hydride. B. which of the following hydrides is contained in the flask, BH3, B2H6, or B4H10 A. MM = 27.597 g/mol B.

    asked on November 13, 2015
  83. math

    Types of bonds are divided into three categories: good risk, medium risk, and poor risk. Assume that of a total of 13,838 bonds, 7,035 are good risk, 1,388 are medium risk, and the rest are poor risk. One bond is chosen is chosen at random. what is the

    asked on October 4, 2015
  84. Math OMG Please help

    A wooden access ramp is being built to reach a platform that sits 45 inches above the floor. The ramp drops 3 inches for every 31-inch run. -Write a linear equation that relates the height y of the ramp above the floor to the horizontal distance x from the

    asked on October 2, 2015
  85. MATH

    When a draftsman draws three lines that are to intersect at one​ point, the lines may not intersect as intended and subsequently will form an error triangle. If this error triangle is long and​ thin, one estimate for the location of the desired point

    asked on October 2, 2015
  86. calc

    Let F of x equals the integral from 1 to 3 times x of the natural logarithm of t squared. Use your calculator to find F″(1).

    asked on July 29, 2015
  87. math-urgent

    A ball with a mass 0.15kg is thrown upward with an initial velocity 20m/s from the roof of a building 30m high. Neglect air resistance. Find the max height above the ground that the ball reaches. Assuming the ball misses the building find the time that it

    asked on June 21, 2015
  88. chemistry

    25 ml of 3M hno3 are mixed with 75ml of 4.0M HNO3 if volumes are additive then find molarity

    asked on April 18, 2015
  89. Calculus

    A certain magical substance that is used to make solid magical spheres costs $800 per cubic foot. The power of a magical sphere depends on its surface area, and a magical sphere can be sold for $20 per square foot of surface area. If you are manufacturing

    asked on March 30, 2015
  90. English Help Please

    An example of dramatic irony in The Diary of Anne Frank,Act I is when A. Peter easily removes his Star of David but Anne has difficulty removing it because it is a symbol of her Jewish heritage. B. Anne states she will go to Paris or be a famous dancer and

    asked on March 9, 2015
  91. math

    Scenario 1) You and your friend enjoy riding your bicycles. Today is a beautiful sunny day, so the two of you are taking a long ride out in the country side. Leaving your home in Sunshine, you ride 6 miles due west to the town of Happyville, where you turn

    asked on November 26, 2014
  92. Quick math help

    An angle with a measure of 89.9 degrees... Would it be a right or an acute angle?

    asked on September 14, 2014
  93. maths

    The rectangle box with square base is open at the top. The maximum volume of the box made from 1200 m2 tin,in m3 is:

    asked on September 7, 2014
  94. statistics

    A bottling commpany produces bottles that hold 10 ounces of liquid . Periodically, the company gets complaints that their bottles are not holding enough liquid. To test this claim, the bottling company randomly samples 25 bottles and finds the average

    asked on May 22, 2014
  95. Chemistry

    How many grams of nitrogen are required to react with 2.79g of hydrogen to produce ammonia? A) 25.8 g B) 13.0 g C) 78.2 g D) 38.7 g E) 77.4 g I get the answer as 38.7 but it is meant to be B I did 2.79g x 3molH2/2.016g/mol x 1molN2/3molH2 x

    asked on May 8, 2014

    Which set of lengths could be the side lengths of a right triangle? (1 point) • 20 cm, 22 cm, 29 cm • 10 ft, 12 ft, 15 ft • 7 km, 24 km, 28 km • 13 in, 84 in, 85 in

    asked on May 7, 2014
  97. physics

    For the purposes of this problem, there are three parts to the figure, and the center of mass of each one is shown in the drawing. These parts are: (1) the torso, neck, and head (total mass = 40.4 kg) with a center of mass located on the y axis at a point

    asked on March 27, 2014
  98. Math

    Given the following function, choose the graph with the two possible angles with the domain 0 < or = to theta < or = to 360 degrees. Sec(theta)= -13/5

    asked on March 24, 2014
  99. Accounting

    If fixed costs are $300,000, the unit selling price is $31, and the unit variable costs are $22, what is the break-even sales (units) if fixed costs are reduced by $30,000? Answer 30,000 units 8,710 units 12,273 units 20,000 units

    asked on July 14, 2013
  100. Accounting

    As of January 1 of the current year, the Grackle Company had accounts receivables of $50,000. The sales for January, February, and March were as follows: $120,000, $140,000 and $150,000. 20% of each month’s sales are for cash. Of the remaining 80% (the

    asked on July 14, 2013