1. College Stats

    Suppose that two random variables X1 and X2 have a bivariate normal distribution, and Var(X1) = Var(X2). Show that the sum X1+X2 and the difference X1− X2 are independent.

    asked by Sophia on January 24, 2017
  2. Health

    Individuals suffering from anorexia suffer extreme weight loss, usually _____ below the person's normal body weight 5% 8% 10%**** 15%

    asked by Jacob on May 7, 2016
  3. Health

    how does a disabled wheelchair person cook? use the bathroom? take a shower? and stuff a normal person does in thier everyday life

    asked by Health on April 10, 2013
  4. health supports

    normal motion of the sacroiliac joints is a ? A.hinge action B.gliding action C.rotation D.slight flexture my answer is d

    asked by susue on July 17, 2013
  5. Chemistry

    How does one calculate the pH of a solution that is only 1.84% ionised? determine the concentration of the H+, which will be in a monoprotic acid, concentration * decimal percent. then determing pH in the normal way.

    asked by Fiona on May 21, 2007
  6. dynamics

    at the bottom of a loop the speed of an airplane is 400 mph. this causes a normal acceleration of 9 g ft/sec^2, determine the radius of the loop

    asked by aaa on April 27, 2012
  7. stats

    Suppose for a given group of people, the mean height is 5.5 ft with a standard deviation of .25 ft, and let the data fall under a normal distribution.What percentage of the group is between 5 ft and 5.75 ft?

    asked by yvonne on May 15, 2017
  8. Maths

    9 is a very strange digit. Try to use four nines 9999 and normal operations plus minus multiply divide brackets etc, use 4 nines to make 20

    asked by Tim on September 14, 2013
  9. college

    Determine the flux through a circular coil (diameter = 8.2 cm) when the magnetic field is 1.5 T and is oriented at 32.6 degrees with respect to the coil's normal.

    asked by Alex on April 14, 2010
  10. chemistry

    molecular wt of glucose is 180.14g/mole. What is the quanity of glucose in a 500mL IV solution of a 5% dextrose normal saline contain?

    asked by Anonymous on July 1, 2014
  11. Pre calc

    A set of 500 values has a normal distribution. The mean of the data is 24 and the standard deviation is 2. Find the range about the mean which includes 50% of the data.

    asked by Brandon on November 5, 2012
  12. math

    the iq score of employee in a firm follow a normal distribution. if the mean is 90 and standard deviation is 13. what percentage of score lies between 64 and 116?

    asked by ram on February 12, 2016
  13. Calculus-PLZ help!

    Given u=3i-2j+k,v=2i-4j-3k, w=-i+2j+2k, 1 Find a unit vector normal to the plane containing v and w. 2 Find the volume of the parallelepiped formed by u, v, and w. 3 Are any of these vectors parallel? Orthogonal? Why or why not?

    asked by Liz on May 13, 2013
  14. statistics

    In a normal distribution with the mean being 500 and the standard deviation being 100, what raw score separates the top 40% of a distribution from the rest?

    asked by Jessica on July 30, 2012
  15. statistics

    In a normal distribution with the mean being 500 and the standard deviation being 100, what raw score separates the top 40% of a distribution from the rest?

    asked by Jessica on July 30, 2012
  16. physics

    Two identical 1.60 {\rm kg} masses are pressed against opposite ends of a spring of force constant 1.85 {\rm N}/{\rm cm}, compressing the spring by 25.0 {\rm cm} from its normal length.

    asked by Anonymous on December 23, 2011
  17. chemistry

    Why would it not be useful to just use pure ethanol or pure ethylene glycol as an antifreeze since their normal freezing points are -114.1 C abd -12C respectively.

    asked by redgy on February 14, 2011
  18. Stats

    With normal approximation method and technology, is it necessary to use the one sample z test for proportion for large sample sizes instead of the binomial formula?

    asked by Joan on April 1, 2011
  19. maths

    A clothing firm determines that in order to sell x suits, the price per suit must be p = 150 - 0.5x. It also determines that the total cost of producing x suits is given by C(x) = 4000 + 0.25x^2. a. Find the total revenue R(x). b. Find the total profit

    asked by shila on October 23, 2007
  20. math

    he pie chart below shows how the total annual income for a certain family is spent. If the amount budgeted for Housing and Insurance combined is 42,000, what is the total family income? there is saving 8%, food 19%, clothing 18%, auto 12%, entertainment

    asked by mary ann on January 15, 2015
  21. Physics

    You pull on a wagon resting on the sidewalk. What will happen next? The wagon moves because you apply more force to the wagon than it applies to you. The wagon doesn’t move because the force you apply to the wagon is equal to the force it applies to you:

    asked by BlessedGalPal on October 8, 2018
  22. Physics

    A Football player on team a is movin gat a velocity of 8ms at an angle of 49 below the x axis. He collides with a player on team B, The Player B is moving at 7.5ms at an angle of 41 below the X and has a mass of 110KG after the collision both players

    asked by Alex on July 30, 2012
  23. Math

    What is the value of the missing angle? 720 120 128 138 There's a hexagon and the angles are 152 degrees 85 degrees 125 degrees 135 degrees and another 85 degrees

    asked by MyNameIsNunya on April 12, 2018
  24. Physics

    A speed trap is set up with two pressure-activated strips placed across a highway, 110 m apart. A car is speeding along at 33 m/s, while the speed limit is 21 m/s. At the instant the car activates the first strip, the driver begins slowing down. What

    asked by Sara on December 19, 2008
  25. maths

    Compass bearings of a carin are taken from two points A and B, 400 m apart, along a strsight north-south path, A being due north of B. the bearings of the carin from A and B are 110 degrees and 80 degrees, respectively. choose the two options which give

    asked by claire philips on May 12, 2007
  26. math word problem

    Read the following story about the TV weatherperson and identify as many places as possible that the weatherperson could use addition or subtraction of integers to answer her questions. Write and solve the number sentences she could use. Ms. Cloudcover,

    asked by Anonymous on July 1, 2009
  27. Physics... rotation

    A constant force of 40 N is applied tangentially to the rim of a wheel with 20 cm radius. The wheel has a moment of inertia of 30 kg m2. Show that the angular acceleration of the wheel is 0.27 rad s-2

    asked by Kimora on November 14, 2008
  28. phy

    A 12N force is applied to a 20kg door If a frictional torque is present what will be the angular acceleration of the door The door is 80cm wide and I=1/3ml^2.

    asked by ami on October 23, 2010
  29. Physics :)

    An object has a moment of Inertia of 300 kgm^2. A torque of 94 Nm is applied to the object. What is the angular acceleration of the object? Can someone please explain this to me and help me find the correct answer?! Thank you! :)

    asked by Savannah on April 13, 2013
  30. psy - revise please

    By the time people reach young adulthood, they have an idea of what causes them stress. The text discusses several sources of stress. What sources of stress did the text identify of which you were previously unaware? Has your reading helped you identify

    asked by rose-Ms. Sue on April 22, 2008
  31. maths

    by selling at 77% some 9/4%shares of face value 100 and investing the proceeds in 6% shares of face value 100, selling at 110 a person got profit of 117. how many shares did he sell?

    asked by aarathy on February 27, 2016
  32. physics/calc

    An anchor weighing 110 lb in water is attached to a chain weighing 2 lb/ft in water. Find the work done to haul the anchor and chain to the surface of the water from a depth of 35 ft.

    asked by j on March 22, 2014
  33. physics

    If instead, the swimmer makes 30.5 laps in the same pool in 3 h, determine the total distance the swimmer traveled, the swimmer's total displacement, the swimmer's average velocity, and the swimmer's average speed. -answer in km

    asked by lauren on January 22, 2012
  34. math

    Quadrilateral PQRS is a parallelogram. If adjacent angles are congruent, which statement must be true? A. PQRS is a square. B. PQRS is a rectangle. C. PQRS is an isosceles trapezoid. D. PQRS is a rhombus

    asked by y.m. on June 8, 2010
  35. Social studies

    Does having an unusual name, such as Chastity, Englebert or Moon unit, have an effect on how a child develops? The results of some previous studies agrees with the commonsense idea that such as name could cause a child to be rejected or ridiculed and thus

    asked by anonymous on April 13, 2017
  36. stats

    Education 25 t0 34 35 t0 54 55+ Total Did not complete high school 4,474 9,155 14,224 27,853 Completed high school 11,546 26,481 20,060 58,087 1-3 years of college 10,700 22,618 11,127 44,445 4 or more years of college 11,066 23,183 10,596 44,845 Total

    asked by Anonymous on February 7, 2009
  37. Statistics

    Profitability remains a challenge for banks and thrifts with less than $2 billion of assets. The business problem facing a bank analyst relates to the factors that affect return on assets(ROA), an indicator of how profitable a company is relative to its

    asked by Julie Nessa on December 9, 2016
  38. Physics

    If five forces act towards the same point on a body at angles of 60, 120, 180, 240 and 270 degrees and their respective magnitudes are 60N, 40N, 30N, 25N and 20N. Determine whether this system of forces is in equilibrium; find the resultant.

    asked by Chinedu on March 3, 2010
  39. physics

    A football kicker can give the ball an initial speed of 25m/s. What are the greatest and least elevation angles at which he can kick the ball to score a field goal from a point 50m in front of goalposts whose horizontal bar is 3.44m above the ground?

    asked by john on April 30, 2015
  40. Chemistry

    Sorry for postiong twice. But I really need to know if the answers I am getting are correct; Nitrogen and oxygen react to produce nitric oxide according to the following equation: N2 (g) + O2 (g) → 2 NO (g) The equilibrium constant for this reaction is

    asked by John on March 10, 2018
  41. geometry

    Please refer to the following photo to answer this question: screenshotsfirefoxcom/0F0pXhMjyyk0fnnP/brilliantorg A kite is divided into four regions by two line segments that connect the midpoints of opposite sides. Is the total blue area equal to the

    asked by unowen on November 22, 2017
  42. Physics

    In a game of American football, a quarterback takes the ball from the line of scrimmage and runs backwards for 10 yards, and then sideways to the left, parallel to the line of scrimmage for 15 yards. At this point, he throws a forward pass at the angle of

    asked by John on February 3, 2012
  43. math plz

    A sales manager was given a bonus of $6,350 on the year's sales of $440,000. When answering the following questions, please make sure your final answers are in percentage form and are accurate to 2 decimal places. For example 34.56%. a) What was the bonus

    asked by suvi on February 8, 2010
  44. Chemistry

    Need help with #2 & # 3 1. Record the pairs of data for pressure (atm) and volume (mL). Pressure(atm) Volume(mL) 1.000 150 mL 1.154 130 mL 1.364 110 mL 1.667 90 mL 2. Does your experimental data verify Boyle's Law? Explain. 3. What pressure would the gas

    asked by Ashley on May 14, 2010
  45. Biology

    If two people with normal vision have a daughter can she be colorblind? I tought that the answer would be no because it is sex linked and the second X in women makes up for the X that is colorblind that she might have but what if they are both carriers of

    asked by Ayeisha on May 10, 2007
  46. Statistics

    In the following problem, check that it is appropriate to use the normal approximation to the binomial. Then use the normal distribution to estimate the requested probabilities. More than a decade ago, high levels of lead in the blood put 87% of children

    asked by Leatha on March 11, 2015
  47. geometry

    A child on top of a lighthouse observes two ships that are 90 ft apart from each other. The angles of the depression of the two ships are 34º and 20º. How far is the closest ship from the base of the lighthouse? I'm sorry, I would show my work, I just

    asked by Katie on February 3, 2015
  48. Geometry

    A child on top of a lighthouse observes two ships that are 90 ft apart from each other. The angles of the depression of the two ships are 34º and 20º. How far is the closest ship from the base of the lighthouse? I'm sorry, I would show my work, I just

    asked by Katie on February 3, 2015
  49. math

    An observer in a lighthouse 48.8 m above sea level saw two vessels moving directly towards the lighthouse. He observed that the angles of depression are 42 and 35 degrees. Find the distance between the two vessels, assuming that they are coming from the

    asked by Daniela on February 20, 2017
  50. Math

    Determine how many triangles can be drawn. Calculate, then label, all side lengths to the nearest tenth and all interior angles to the nearest degree. a= 2.1 cm, c= 6.1 cm,

    asked by Jeremy on March 29, 2015
  51. alg 2

    evaluate cot 11 pie/6 to the nearest hundred angle given in radians.. is there a way to put this in calculator. another ? use a calculator and inverse function to find radian measures of the given angle angles whose tangent is 4.21 is that 1.34 the answer?

    asked by jerson on June 10, 2008
  52. Trigonometry

    A triangle has two angles, one 90 degrees, the other (between adjacent and hypotamuse) 26 degrees, and a hypotamuse of 10ft. Find the opposite side's length. Hint: use sine. I think I'm supposed to do 10(sine26), but the answer isn't right. What am I

    asked by DeeDee on September 7, 2013
  53. Physics

    Two vectors F1 and F2 with magnitude F1=42N and F2=70N and where angle1=83 and angle2= 300. The angles are measures from the positive x axis with the counter-clockwise angular direction as positive. What is the magnitude of the resultant vector where

    asked by Melissa on November 19, 2015
  54. chemistry

    at standard pressure, which has the highest average kinetic energy? a)H20(g) at 110 oC b)H20(s) at -10 oC c)H20(l) at 25 oC d)H20(l)(arrows going opposite directions)H20(g) at 70 oC e)H20(s)( arrows going opposite direction)H20(l) at 0 oC

    asked by Anonymous on September 26, 2011
  55. Geometry

    Help! I'm so confused :( 1. Supply the missing reasons to complete the proof. Given: angle Q is congruent to angle T and line QR is congruent to line TR Prove: line PR is congruent to line SR Statement | Proof 1. angle Q is congruent| 1. Given to angle T

    asked by Anonymous on December 18, 2017
  56. Microeconomics

    When agricultural production increases , the total amount paid for agricultural products tends to a. increase because demand is price elastic b. decrease becasue deamn is price elastic c. increase because demand is price inelastic d. decrease because

    asked by Karinna on March 14, 2009
  57. chemistry

    Copper can be determined gravimetrically by precipitation as copper(I)thiocyanate, CuSCN. A wrought aluminum-copper sample(4.5167 g) was dissolved in a minimum amount of concentrated HCl followd by the additon of 25 ml of sulfurous acid to reduced the

    asked by WILL on December 22, 2012
  58. Math sin/cos

    On a piece of paper draw and label a right triangle using the given sides, solve for the unknown side and write the trigonometric functions for angles A and B, if a=5 and c=7. I already found side b which equals 2 sqrts of 6. Now I need to find the sin/cos

    asked by Anonymous on March 10, 2007
  59. physics

    A race car, starting from rest, travels around a circular turn of radius 20.8 m. At a certain instant, the car is still accelerating, and its angular speed is 0.515 rad/s. At this time, the total acceleration (centripetal plus tangential) makes an angle of

    asked by Katie on March 17, 2012
  60. chemistry

    The total acidity in water samples can be determined by neutralization with standard sodium hydroxide solution. What is the total concentration of hydrogen ion, H+, present in a water sample if 300. mL of the sample requires 7.5 mL of 2.8 10-3 M NaOH to be

    asked by lyne on March 27, 2009
  61. physics

    A racing car, starting from rest, travels around a circular turn of radius 28.9 m. At a certain instant, the car is still accelerating, and its angular speed is 0.421 rad/s. At this time, the total acceleration (centripetal plus tangential) makes an angle

    asked by LostInLouisiana on October 26, 2010
  62. algebra

    1. Suppose Mary deposits $200 at the end of each month for 30 years into an account that pays 5% interest compounded monthly. a. How much total money will she have in the account at the end? b. How much total money did Mary actually deposit? c. How much

    asked by beech on October 11, 2011
  63. Algebra 116

    1. Solve using the Elimination Method. 2r - 7s = -57 7r %2B 2s = 39 What is the solution set ______? 2. Simplify -8[-90-(-60-14)]= ______ 3. Solve using the Substition Method. 5x %2B 7y = 41 x = 61 - 8y What is the solution _______? 4. On three consecutive

    asked by MzMaria on September 30, 2008
  64. Geometry

    The m angle A is 30 more than twice angle B. If angle A and angle B form a linear pair, find the measure of both angles.

    asked by Maria on September 8, 2012
  65. math

    asked by anonymous on October 3, 2011
  66. Math

    The area of a triangle is 75 sq in. Calculate the possible angles formed by the triangle's 12-inch and 15-inch side.

    asked by jess on August 11, 2010
  67. Geometry

    In hexagon ABCDEF, AB = DE = 2, BC = EF = 4, CD = FA = 6, and all the interior angles are equal. Find the area of hexagon ABCDEF.

    asked by Help for this on February 12, 2017
  68. Geometry/Algebra

    Two opposite angles of a parallelogram are (5x-2)degree and (40-x)degree. Find the measure of each angle of a parallelogram.

    asked by Anonymous on June 13, 2012
  69. math

    One side of triangle is 10 centimetres, two angles next to that side are 30° and 60°. I need to find all three angle bisectors of triangle.

    asked by eve on January 15, 2012
  70. Math

    Sandra was thinking of a quadrilateral. All 4 sides are the same length and are parallel. There are 4 right angles. Which quadrilateral is she thinking of?

    asked by Isabella on February 10, 2012
  71. math

    A figure has 2 sets of parallel sides and 4 right angles. All of the sides are the same length. What are the 3 names for the figure?

    asked by mythreyee on November 30, 2012
  72. college

    The measure of a third angle in an isosceles triangle is 82.5 more than the measure of the two equal angles. whats the angle of the third.

    asked by Anonymous on November 8, 2012
  73. Math

    One angle of an isosceles triangle measures 80 degrees. Witch other angles could be in that isosceles triangle?

    asked by Courtney0 on April 26, 2018
  74. Mount Carmel

    In a trapezium ABCD , angleA :angleD = 3:2 and angle B : angle C = 4:5 . Find all angles of trapezium .

    asked by Yashvi on September 10, 2015
  75. statistics

    {Exercise 3.55} Morningstar tracks the total return for a large number of mutual funds. The following table shows the total return and the number of funds for four categories of mutual funds (Morningstar Funds500, 2008). a. Using the number of funds as

    asked by abdull on October 17, 2011
  76. Earth Science

    Slide 1 This is a cumulus cloud. Can you find four things on the word list that you can use to describe this cloud. Cumulus clouds consists of puffy tops, no rain expected, 3,000 ft. high, and flat bottoms. Slide 2 This is an example of towering cumulus

    asked by Sam on February 16, 2017
  77. Science

    A car is traveling at 65 km/hr. The brakes are applied and the car stops in 3 seconds. What is the car's acceleration?

    asked by Lana on December 1, 2015
  78. Chemistry

    In a study of the following reaction at 1200K it was observed that when the equilibrium partial pressure of water vapor is 15.0 torr, the total pressure at equilibrium is 36.3 torr. 3Fe(s)+4H2O(g) (reversible arrows) Fe3O4(s)+4H2(g) Calculate the value of

    asked by Taasha on July 30, 2007
  79. statistics

    The eruption height and the time interval after eruption of a geyser were measured and shown below. Height(x) 115 120 120 130 140 110 140 100 Interval after(y) 59 64 68 71 75 56 73 54

    asked by anonymous on November 18, 2013
  80. Problem Solving

    Sydnell buys a calculator that's on sale. He paid $90 not including tax. if she had purchased the calculator while it wasn't on sale, he would have paid $110 not including tax. What was the discount he received? Explain. Thanks! (:

    asked by Skyler on January 29, 2010
  81. ECON

    I am working on this but, if I have part a and b wrong, all of the following question related will be wrong. Can you help me out? The market for product A has the following functions: Market demand Q=1,000-4P Market supply Q=1/2P Inverse market demand

    asked by Trisha on June 24, 2005
  82. science

    Part I: Units of Measurement for Gas Laws For the following questions, use the following answer choices to indicate what each unit of measurement is used to measure (pressure, volume, or temperature). 1. atm 2. kPa 3. L 4. oC 5. torr 6. K 7. mL 8. cubic

    asked by Alex on March 2, 2015
  83. English

    1.)my first question is which of the quotes from henry's speech represents an appeal to the head? a. '' we are apt to shut our eyes against a painful truth, and listen to the song of that siren, till she transforms us into beasts.'' b.''has great Britain

    asked by joshua on March 10, 2018
  84. math

    one candy bar contains 220 calories. If this represents 10% of the total calories a person consumes in one day, find the total number of calories consumed in a day. 220/x=10/100 cross multiply so x=2200 is this correct? thanks

    asked by Elle on October 29, 2013
  85. linear equation in one variables

    The organisers of an essay competition decide that a winner in the competition gets a prize of Rs 100 and a participant who does not win gets a prize of Rs 25. The total prize money distributed is Rs 3,000. Find the number of winners, if the total number

    asked by sunil on April 8, 2016
  86. college algebra

    Buying and selling land. Anoa bought two plots of land for a total of $120,000. When she sold the first plot, she made a profit of 15%. When she sold the second, she losT 10%. Her total profit was $5500. How much did she pay for each piece of land.

    asked by crystal on March 22, 2009
  87. math

    Assume a 30 month CD purchased for 2000 pay simple interest at an annual rate of 5.5%. How much total interest does it turn what is the balance at maturity. They want to know the total interest and the balance at maturity and they want us to give our

    asked by matt on January 16, 2016
  88. algebra

    find sales tax in your area --(6%). using tax rate, write a linear equation representing the total with tax for a purchase of x dollars. Using this equation to dtermine what the pretax cost of the item is if the total cost is $10.

    asked by sally on May 14, 2010
  89. math

    A bag of buttons contains 3 red, 4 orange, 7 green and 10 blue battens. How many orange buttons should be added so that makes up 1/4 of the total? (Remember, if you add more orange buttons, your total buttons will also increase.) Pla help due tomorrow

    asked by anne on February 10, 2014
  90. algebra

    Truck Rental Plus charges its customers based on a linear model. the table to the right depicts this data. they charge their customers $95 for using their truck for a total of 100 miles and $140 for using their truck for a total of 200 miles

    asked by Anonymous on November 29, 2017
  91. psy- revise please

    Question: By the time people reach young adulthood, they have an idea of what causes them stress. The text discusses several sources of stress. What sources of stress did the text identify of which you were previously unaware? Has your reading helped you

    asked by rose - Ms. Sue on April 22, 2008
  92. Chemistry

    A student who was isolating aspirin stopped the experiment after filtration step alumina. One week later, the methanol was evaporated and the experiment was completed. The melting point of the aspirin was found to be 110-115 degrees C. Explain why the

    asked by Nina on October 10, 2008
  93. biology

    Hemoglobin is a critical oxygen-carrying protein. The protein functions as a tetramer with two α-globin subunits and two β-globin subunits. Individuals homozygous for a specific single point mutation in the region that encodes the sixth amino acid in

    asked by Anonymous on May 2, 2013
  94. 12th grade calculus

    find the lines that are tangent and normal to th ecurve at the point given 1. 2xy+piesiny=2pie (1, pie/2) 2. x^2cos^2y-siny=0 (0, pie)

    asked by elley on October 20, 2008
  95. chemistry

    a sample of water under study was found to boil at 102 degree celiceus at normal temperature and pressure . is the water pure

    asked by sanjeed on June 23, 2011
  96. statistics

    Consider a normal distribution with mean 30 and standard deviation 6. What is the probability a value selected at random from this distribution is greater than 30? (Round your answer to two decimal places.)

    asked by Anonymous on October 23, 2010
  97. statistics

    Assuming the resting heart rates for a sample of individuals are normal distibuted with a mean of 70 and a standard deviation of 15. Waht percentage of rates less than 70

    asked by Darlene Watson on November 12, 2010
  98. Algebra

    Simplify: (x^n)+(x)/(x^2)-(1) -------------------divide top by bottom (x^n+2)-(x^2)/ (x^2n)-(2x^n)+1 I can do problems similar to this if it has normal numbers but I can't do it because I am confused about the n's and the the numbers added to it. Please

    asked by Sara on July 22, 2007
  99. Algebra

    Scores on a test have a mean of 66 and Q3 is 80. The scores have a distribution that is approximately normal. Find the standard deviation. Round your answer to the nearest tenth. 10.5 18.7 20.9 9.4

    asked by Leozap on May 1, 2015
  100. Maths

    9 is a very strange digit. Try to use four nines 9999 and normal operations plus minus multiply divide brackets etc, use 4 nines to make 100

    asked by Tim on September 14, 2013