1. Discrete Math

    Find z so that 5% of the area under the standard normal curve lies to the right of z. the answer according to the book is 1.645, anyone got any ideas on how to get this?

    asked by Jessica on January 21, 2013
  2. Physics

    a 10-kg bos slides down a frictionless ramp with acceleration 3.6 m/s calculate the weight....the angle and normal force

    asked by Bolo on October 8, 2010
  3. Economics

    The handmade snuffbox industry is composed of 100 identical firms, each having short – run total costs given by STC = 0.5q2 + 10q + 5 and short – run marginal costs by SMC = q + 10 where q is the output of snuffboxes per day. a) What is the short

    asked by Pravinesh on November 2, 2011
  4. Probability

    Using standard deviation. Normally distributed mean of 0 degrees standard deviation of 1.00 degrees celcius. 1. between 0 and 1.28 2. greater than 0.37 3. less than -0.92 4. between 1.50 and 2.50 5. between -0.90 and 1.95 6. less than 0 I don't know how to

    asked by Sue on December 5, 2006
  5. Math

    A rectangle prism is 8 cm long. a)How many 2 x 2 x 2 cm cubes can the prim be cut into? b)What is the total surface area of all the 2 x 2 x 2 cm cubes? c) What is the total volume of all the 2 x 2 x 2 cubes?

    asked by Anonymous on January 14, 2016
  6. Math

    About what percent of the total population believed saying 136,800,000 to be true? Total Populaton:250,000,000

    asked by Dwayne on September 6, 2011
  7. biology - glycolysis +atp (help)

    9. The total amount of energy released from the chemical bonds of glucose is 2870 kJ/mol, after the initial investment of 2 ATP. The total energy that can be harvested to form ATP molecules is about 1200 kJ/mol. a. After the initial investment of 2 ATP, 38

    asked by Farah on March 2, 2011
  8. Math

    Elizabeth visits her friend Andrew and then returns home by the same route. She always walks 2km/h when going uphill, 6km/h when going downhill and 3km/h when on level ground. If her total walking time is 6 hours, what is the total distance she walks in

    asked by Fran on October 2, 2012
  9. Physics

    highway saftey engineers build soft barriers so that cars hittingthem will slow down at a safe rate. a person wearing a saftey belt can withstand an acceleration of 300 m/s how thick should barriers be to safely stop a car that hits a barrier at 110 km/h

    asked by Madi on September 9, 2010
  10. Chemistry

    Hello, i seem to be stuck on a problem and do'nt know why im not gettin the right answer.I have the he Ka and Kb values for each of the weak acids and bases from the chart and I keep getting zero and the second one 2.27*10^-24 is this correct?? Thank uu

    asked by Amy Wight on March 24, 2011
  11. Chemistry

    Hello, i seem to be stuck on a problem and do'nt know why im not gettin the right answer.I have the he Ka and Kb values for each of the weak acids and bases from the chart and I keep getting zero and the second one 2.27*10^-24 is this correct?? Thank uu

    asked by Amy Wight on March 24, 2011
  12. physics

    A small motor draws a current of 1.76 A from a 110 V line. The output power of the motor is 0.20 hp. (a) At a rate of $0.060/kWh, what is the cost, in cents, of operating the motor for 4.0 h? (b) What is the efficiency of the motor? for (a) i am doing

    asked by julie on March 14, 2011
  13. Chemistry

    Hello, i seem to be stuck on a problem and do'nt know why im not gettin the right answer.I have the he Ka and Kb values for each of the weak acids and bases from the chart and I keep getting zero and the second one 2.27*10^-24 is this correct?? Thank uu

    asked by Amy Wight on March 24, 2011
  14. math

    Robert's acct p $98.50 has been delinquent for three months. Office procedures charge a 2% service charge after 90 days componded monthly and is added to future bills. What will be the amount owed after nine months? I did $98.50 x 2% = $1.97 $1.97 x

    asked by LASTDAYS on May 13, 2010
  15. Biology (Genetics)

    How would you solve these problems? I am confused about what it is asking and how to start it. A step by step process with explanation would be greatly appreciated. Also, are there any simple ways to work out the problems without getting confused, or is

    asked by Airin on September 15, 2015
  16. Math

    Sam has a total of 200 dimes and quarters. If the total value of the coins is $28.10, how many quarters does he have?

    asked by Leon on August 22, 2012
  17. algebra 1

    marcy has a total of 100 dimes and quarters. if the total value of the coins is $14.05, how many quarters does she have?

    asked by kelly on January 31, 2010
  18. algebra 1

    marcy has a total of 100 dimes and quarters. if the total value of the coins is $14.05, how many quarters does she have?

    asked by kelly on January 31, 2010
  19. math

    Joe has a total of 100 dimes and quarters. If the total value of the coins is $14.05, how many quarters does she have?

    asked by Fred on April 26, 2011
  20. algebra

    If you have a total budget of 118,000 what integer would represent a total budget?

    asked by Help needed on February 1, 2008
  21. Economics

    Retrieve the average total cost function given that the total cost=Qsquared+5Q+6

    asked by Gloria on January 10, 2018
  22. algebra1

    Marcy has a total of 100 dimes and quarters. if the total value of coins is $14.05,how many quarters does she have?

    asked by bianca on February 14, 2010
  23. math

    The runway of an airfield faces west. An airplane, flying in the direction of north-east at a height of 2km and at a speed of 400km/h, on a path which passes over a point 3km west of the runway end, is spotted sqrt(29)km horizontally(south-western

    asked by Jainee on November 20, 2011
  24. math,algebra,help

    Now this one it has a different question it asks: What was the age 15-64 population of Europe in 1970? can someone help me or set up the equation for me i would appreciate it. thank you. okay i have a table it reads. It has 4 colums Title population of

    asked by Jasmine20 on January 27, 2007
  25. math

    the sales tax is 6% and the item is $110.00. How much do I add for sales tax?

    asked by arline on May 19, 2013
  26. algebra 2

    A commercial freight carrier is flying at a constant speed of 400mi/h and is traveling 4 mi east for every 3 mi north. A private plane is observed to be 210 mi due east to the commercial carrier, traveling 12 mi north for every for 5 mi west. a.If it is

    asked by Songthan on January 2, 2011
  27. physics

    a horizontal force of 1.2kgf is applied to 1.5kgf of block which rest on surface such that it just begin to slide .if coefficient of friction is 0.3.find out acceleration

    asked by armando on September 6, 2011
  28. physics

    A load W=2 kN is applied vertically to joint C of truss ABCDE as indicated. You will use the method of joints to obtain the axial forces in the bars and reactions at the supports A, E .

    asked by Dog on May 16, 2013
  29. physics

    a 0.5KG ball is drop at concrete incline which is 45 degree above the horizontal then bounces off with the speed of 5m/s due to the force applied on it what is the change in its momentum?

    asked by musonda on March 9, 2015
  30. physics

    A 10 kg mass is sitting on a 25 degree incline. A constant force of 49N is applied up the plane. The coefficient of static friction is .25. Does it go up or down or does it stay put?

    asked by Aaron on February 19, 2013
  31. Physic

    When the break are applied to a moving car travelling at 60km/hr at decelerate at a uniform rate of 5m/s^2. .calculate the time taken to reach a velocity of 36km/hr

    asked by Buchi on October 28, 2018
  32. physics

    a 0.5KG ball is drop at concrete incline which is 45 degree above the horizontal then bounces off with the speed of 5m/s due to the force applied on it what is the change in its momentum

    asked by musonda on March 9, 2015
  33. physics

    4.) A 8.0 kilogram physics textbook experiences an applied force of 28.0 Newtons for 2.6 seconds. The resulting acceleration is 3.50 m/s2. Determine the change in the momentum of the book.

    asked by Melissa on March 4, 2015
  34. PHYSICS!!!

    A net force of 30 N is applied to a 10 kg object, which starts at rest. What is the magnitude of its momentum after 3.0 seconds? Can someone please explain this as you go through the steps? I already know the equation is p=mv and I know that mass is 10kg

    asked by Christina on June 2, 2012
  35. chemistry

    What is the minumum acceleration potential (V) that must be applied to a beam of free electrons for diffraction to occur in a crystal of niobium (Nb)? Express your answer in volts.

    asked by Harold on December 21, 2013
  36. math

    maths (integ) voltage v=25sin50πt is applied on a circuit. using integration, find mean and RMS over range t=0 to 10ms . i got it to 25/2πt^2 cos(2π/9)+c but im not sure that im going the righ way.

    asked by not a lemon on April 21, 2014
  37. world history

    what was the name of the concept which spread this desire for increased militarism and was characterized by the phrade "survival of the fittest"-- evolution being applied to society? Social Darwinism

    asked by Larry on January 28, 2008
  38. probability and statistics

    a certain university in the region has a population of 20000 students distributed into 15 courses and four year levels.if you would like to determine the sample size, what technique can be applied

    asked by fin on January 4, 2015
  39. Legal

    How fast was a car driving when it applied its brakes after striking someone who remained on the hood, and did notcome to a stop for 153 feet, while descending a hill?

    asked by Doug on March 17, 2016
  40. word power

    8. Often applied to politicians, the term _______ suggests hiding one's feelings while obscuring or "spinning" facts. A. simulate B. dissimulate C. vacillate [D. dissemble]

    asked by jake on September 21, 2012
  41. Physics

    Three applied forces F1= 20N, F2= 40N and F3= 10N act on a crate with a mass of 2kg on an incline with θ = 30o, φ = 60o and μk = 0.2, find the acceleration

    asked by user on June 11, 2012
  42. english

    you've applied foa specific job in your field of study. the human resource ARRANGE A INTERVIEW AND TELL YOU BRING YOUR POLISHE PIECE OF WORK

    asked by willie on May 17, 2012
  43. science

    How far out from an axis must a 1200 N force be applied (i.e. what is the forces moment arm) in order to counter and hold a 90 Nm torque acting in the clockwise direction?

    asked by Ariel on January 14, 2012
  44. Physics

    Three applied forces F1= 20N, F2= 40N and F3= 10N act on a crate with a mass of 2kg on an incline with θ = 30o, φ = 60o and μk = 0.2, find the acceleration

    asked by user on June 12, 2012
  45. english

    I have to revise each statement to eliminate the unethical aspects. - Factory- trained technicians respond to all our calls. - “The service contract… on the whole… applied to upgrades .”

    asked by mariana on August 24, 2016
  46. Chemistry

    158.5 mL of a AgNO3 solution at 5.0M was combined with a 3.5M CaCl2 solution. 110.5g of AgCl was recovered. Given that the CaCl2 is the limiting reagent, how many milliliters of the 3.5M CaCl2 solution was used?

    asked by Sara on April 5, 2011
  47. Physics

    An R-C circuit is driven by an alternating voltage of amplitude 110 V and frequency w. Define V0 to be amplitude of the voltage across the resistor. The resistance of the resistor is 1000 ohms and the capacitance of the capacitor is 1 microFarad. What is

    asked by Freddy on March 6, 2012
  48. Algebra

    To play on the football team, a seventh grader must weigh no more than 110 pounds. Your neighbor is in seventh grade and weighs 94 pounds. Write and silve an inequality that represents how much weight your neighbor can gain and still meet the requirement.

    asked by Mike on January 12, 2016
  49. Physics

    There are approximately 110 million TVs in the United States. Each uses, on average, 80 W of power and is turned on for 5.9 hours a day. If electrical energy costs 0.11 dollars per kWh, how much money is spent every day in keeping the TVs turned on?

    asked by Drue on April 1, 2013
  50. Algebra

    To play on the football team, a seventh grader must weigh no more than 110 pounds. Your neighbor is in seventh grade and weighs 94 pounds. Write and silve an inequality that represents how much weight your neighbor can gain and still meet the requirement.

    asked by Mike on January 12, 2016
  51. programmning code

    Is this code right? Declare Integer days, counter = 1 Declare Real penny = 1, salary, total = 0 Display "Enter a number of days." Input days Display "Days",TAB,"Salary While counter

    asked by Anon on May 21, 2010
  52. Physics please check

    A uniform solid disk with a mass of 32.3 kg and a radius of 0.414 m is free to rotate about a frictionless axle. Forces of 90.0 N and 125 N are applied to the disk. (a) What is the net torque produced by the two forces? (Assume counterclockwise is the

    asked by Mary on April 24, 2007
  53. Economics

    The handmade snuffbox industry is composed of 100 identical firms, each having short – run total costs given by STC = 0.5q2 + 10q + 5 and short – run marginal costs by SMC = q + 10 where q is the output of snuffboxes per day. a) What is the short

    asked by Pravinesh on November 5, 2011
  54. PHYSICS

    The drawing shows a large cube (mass = 34 kg) being accelerated across a horizontal frictionless surface by a horizontal force P. A small cube (mass = 3.3 kg) is in contact with the front surface of the large cube and will slide downward unless P is

    asked by MJ on June 4, 2007
  55. math

    1. The cost of a regular price to Saint Louis Cardinal baseball was $60. During the World Series, the price increased by 2/5. What did the fans pay? A. $65 B. $84 C. $80 D. $69 my answer is D 2. Abby is touring China for four days. The rental is $38.15 per

    asked by Kim on May 22, 2014
  56. Business Economics

    When we are given an expression for the Short Run Total Cost Curve (for eg: 8 + 3Q - 1.5Q^2 + 0.25Q^3), how do you derive expressions for the following: 1. Average Fixed Costs 2. Average Viarable Costs Curve 3. Marginal Costs Curve 4. Short Run Supply

    asked by Dan on April 18, 2007
  57. 8th grade math

    Kenisha sells athletic shoes part-time at a department store. She can either earn $500 per month plus a 4% commission on her total sales or $400 per month plus a 5% commission on total sales. A)write a system of equations to represent the situation. B)what

    asked by jessica on April 28, 2010
  58. Chemistry

    A mixture of ethane and ethene occupied 35.5 L at 1.000 bar and 405 K. This mixture reacted completely with 110.3 g of O2 to produce CO2 and H2O. What was the composition of the original mixture? Assume ideal gas behavior Im pretty sure i use dalton's law

    asked by Drew on September 19, 2012
  59. physics

    Challenger Deep in the Marianas Trench of the Pacific Ocean is the deepest known spot in the Earth's oceans, at 10.922 km below sea level. Taking density of seawater at atmospheric pressure (p0 = 101.3 kPa) to be 1024 kg/m3 and its bulk modulus to be B(p)

    asked by HELP!!!! on April 16, 2011
  60. accounting

    To reconcile total manufacturing costs with the total cost of goods manufactured during the period, A)subtract out all period costs from total manufacturing costs to arrive at cost of goods manufactured. B)add beginning and subtract ending finished goods

    asked by Lee on August 12, 2008
  61. Statistics

    A. In a given normal distribution, the sample mean is 75 and the sample standard deviation is 4. Find the corresponding standard score of the following values: 1. 69 2. 85 3. 70 4. 65 B. In a given normal distribution, the population standard deviation is

    asked by Sylvia on March 3, 2018
  62. chemistry

    C6H5OH(s) + 7O2(g) --> 6CO2(g) + 3H2O(g) A 2.000 gram sample of pure phenol, C6H5OH(s), is completely burned according to the equation above. If the volume of the combustion chamber is 10.0L, calculate the final pessure in the container when the

    asked by ashley on December 28, 2007
  63. geometry

    a convex polygon has a pattern in which each angle alternates between being 140 degrees and being 148 degrees they give me 5 sides and want me to figure out how many angles

    asked by Anonymous on October 1, 2014
  64. Geometry

    I having diffucltly with this triangle.This trangle angles are 3x,4x,x.You have to solve for x.I know you have to use the triangle sum therom.I got 7x=180.That would equal a decimal point which is not right.It has to be whole number.

    asked by Anonymous on July 4, 2011
  65. physics

    two ropes attached to I beam (mass 500 kg). ropes make angles of 60 degrees with horizontal. Determine tension in each rope

    asked by Anonymous on November 7, 2010
  66. Math

    Mno~pqr for each of the following angles name the angle that is cronguet.please give me the unit test answers for lesson 13 math 7 unit 8-geometry

    asked by Birdie on March 1, 2018
  67. analytical geometry

    if (l1,m1,n1),(l2,m2,n2),(l3,m3,n3) are the direction cosines of three mutual perpendicular lines,show that the line whose direction ratios area l1+l2+l3,m1+m2+m3,n1+n2+n3 make equal angles with them

    asked by manjula on January 16, 2013
  68. Trig

    There is a right triangle with a left side of six, a bottom side of 10, and a hypoteneuse 11.66. How do you find the other two angles? I tried the inverse of tangent 6/11.66, but my calculator said that's invalid. What do you properly do?

    asked by Sam on December 17, 2009
  69. physics

    A proton moves at right angles to a magnetic field of 0.0609 T with a speed of 8.16×10 6 m/s. Find the magnitude of the acceleration of the proton. Answer in units of m/s 2

    asked by Anonymous on March 3, 2011
  70. trig

    my question is find all angles of theta and 2pi whose reference angle is alpha = pi/12. Give exact answers. i cannot for the live of me find this

    asked by patrick on September 15, 2012
  71. Word Problem

    Suppose a frequency table consists of six categories. If all six categories contain the same number of observations, the interior angles of each section of the associated pie chart would be

    asked by Marilyn on September 3, 2008
  72. Math

    If cost = -0.42 and cosw = -0.80, both t and w are positive, and the angles determined by t and w are in quadrant 3, then which of the following statements is true? Here is my answer (B).... a. t > w B. w > t(X) c. Cannot be determined please explain why I

    asked by lizzie1230 on November 29, 2013
  73. analytical geometry

    if (l1,m1,n1),(l2,m2,n2),(l3,m3,n3) are the direction cosines of three mutual perpendicular lines,show that the line whose direction ratios area l1+l2+l3,m1+m2+m3,n1+n2+n3 make equal angles with them

    asked by manjula on January 15, 2013
  74. physics

    the displacement-time graph of two bodies P and Q are straight lines making angles 30° and 60° respectively with time axis .Calculate the ratio of velocities P and Q

    asked by adi on August 31, 2012
  75. Math

    two triangles Use the triangles. Name one pair of congruent angles. A. ∠PQR and ∠VST B. ∠PRQ and ∠SVT C. ∠RQP and ∠TVS D. ∠QPR and ∠STV

    asked by Anonymous on January 10, 2019
  76. science

    Two forces P and Q whose resultant is 10Newton are at right angles to each other. If P makes 30 degrees with resultant.Show me the workings of the magnitude of Q in Newton and the diagram of the vectors.

    asked by Anonymous on June 8, 2015
  77. Geometry

    Two angles are supplementary if the sum of their measures is 180∘. If the measure of one angle is 16x degrees, represent the measure of its supplement as an expression of x.

    asked by Ruben on August 29, 2013
  78. trigonometry

    the bases of a trapezoid are 22 and 12 respectively. The angles at the extremities of one base are 65 degree and 40 degree respectively find the two legs. Answer using law of sines pls

    asked by joe on February 10, 2012
  79. Geometry

    Which statement is no true about adjacent angles? They have no interior points in common. They share a common side. They are coplanar. They have the same measure. My answer: D

    asked by Nicole on November 12, 2015
  80. trig

    From a tower 57 ft high two objects in a straight line from it are sighted at angles of depression of 27degrees and 40degrees5' respectively. Find the distance between the two objects.

    asked by renzkie on January 2, 2014
  81. math

    Determine two coterminal angles (one positive and one negative) for the given angle. Give your answers in radians. a) 8pie/9 b)8pie/45 I know that you have to add 2pie but I do not know how to do that.

    asked by Hannah on October 13, 2009
  82. Algebra, URGENT!

    Two angles are supplementary if the sum of their measures is 180∘. If the measure of one angle is 13x degrees, represent the measure of its supplement as an expression of x.

    asked by Hannah on December 10, 2013
  83. Math

    Working with Equilateral Triangles Problem 1: In a paragraph proof format, show why the angles of an equilateral triangle must measure 60 degrees.

    asked by Anonymous on September 9, 2017
  84. math

    Andy said that any shape with more than three sides or angles has the same number of lines of symmetry. Select the choice that correctly critiques Andy’s reasoning.

    asked by taylor on May 22, 2018
  85. Physics - test question verification

    Forces of 2.4 N and 1.8 N act on an object at right angles to one another. What is the magnitude of a third force acting on the same object so that it remains stationary? A) 3.0 N B) 4.2 N C) 0.6 N I don't understand how the answer is A)

    asked by Theo on January 26, 2015
  86. Chemistry (concentration)

    H2SO4(aq) + 2LiOH(aq) → Li2SO4(aq) + 2H2O(l) 3.2 moles of LiOH enter the reaction and are fully consumed. The molar mass of Li2SO4 is 110 g/mol. The final aqueous solution has a volume of 4.0 L. What is the final concentration of Li2SO4 in g/L? 44

    asked by Summer on April 11, 2018
  87. trig

    as a hot air balloon rises vertically, its angle of elevation from point P on level ground 110 kilometers from th epoint Q directly underneath the balloon changes from 15 degree 5' to 31 degree 45'. Approximately how far does the balloon rise during this

    asked by sam on October 22, 2011
  88. geometry

    In a right triangle, the angles are 90, 66, and 24. The length of the base is 11. What is the length of the hypotenuse?

    asked by Steve on March 16, 2016
  89. Math

    two angles are vertical. if angle A is 37 degrees, what is the measure of angle B?

    asked by Natasha on March 19, 2014
  90. geometry

    If the degree measures of the angles of a triangle are represented by x,y,x+y the triangle must be??

    asked by andrea on February 10, 2011
  91. Math

    Find the ratio of the complementary angles having the ratio of 3:16. With solution please, thank you!

    asked by Jillian on November 19, 2017
  92. math

    a right triangle has one angle that measures 16 degrees. what are the measures of the other two angles?

    asked by dakota on February 5, 2011
  93. Math

    Two angles are complementary. Twice one angle plus the other is 96. Find the measure of each angle.

    asked by Mark on March 23, 2014
  94. Math

    The diagonals of a rhombus are 16cm and 10 cm. Calculate the angles of the rhombus.

    asked by Vanessa on October 19, 2012
  95. math

    if angle A contains 1/2x and angle B contains 1/2(180-x) are the angles A and B supplementary, complementary, or neither

    asked by kahn on September 24, 2014
  96. geometry

    X lies in the interior of

    asked by megan on February 9, 2010
  97. math

    if angle A contains 1/2x and angle B contains 1/2(180-x) are the angles A and B supplementary, complementary, or neither

    asked by sk on September 24, 2014
  98. Math Geometry

    A right triangle has one angle that measures 16 degrees. What are the measures of the other two angles?

    asked by David on January 25, 2011
  99. geometry

    I am given triangle EDF with angles E and F being congruent. What is the perimeter of the triangle if ED= 2x+8, EF= 3x-6, and DF= 4x-6.

    asked by Luke on January 18, 2015
  100. geometry

    Suppose ÐABC = 30°. If ÐABC is bisected, what would each of the new angles measure?

    asked by Superman on June 24, 2010