1. functions

    A and B are accute angles with sin A =0.7 and cos B= 0.4. Find sin(A-B)

    asked by jerson on December 8, 2008
  2. geometry

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

    asked by Superman on June 24, 2010
  3. 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
  4. Math

    Given:a and b are first-quadrant angles, sin a = 5/13 , and cos b = 3/5 , evaluate sin(a - b).

    asked by bill on March 19, 2010
  5. 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 25, 2014
  6. 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
  7. geometry

    X lies in the interior of

    asked by megan on February 9, 2010
  8. trig

    True or false? If A and B are angles of a triangle such that A > B, then cos A > cos B.

    asked by Betsy on January 21, 2011
  9. 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 6, 2011
  10. 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 20, 2012
  11. 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
  12. 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
  13. 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 29, 2010
  14. 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
  15. 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
  16. maths - geometry

    In a space with an orthonormal coordinate system consider the plane; &: 4x-3y=12 (a)(i)Find the coordinates of the points of intersection of the plane & with the coordinates axes (=axes intersections???) (ii)Find the parametric equations for the line of

    asked by Anonymous on April 28, 2010
  17. 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
  18. accounting

    The partners in New Yorker Company decide to liquidate the firm when the balance sheet shows the following. NEW YORKER COMPANY Balance Sheet May 31, 2010 Assets Liabilities and Owners' Equity Cash $27,700 Notes payable $13,140 Accounts receivable 24,790

    asked by mayasa on April 8, 2010
  19. 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
  20. trig

    If a triangle has an area of 50 square units and has angles that measure 15, 65, and 100 degress, find the length of the shortest side to the nearest tenth. Do not round till the final answer.

    asked by A on April 4, 2011
  21. trig

    If a triangle has an area of 50 square units and has angles that measure 15, 65, and 100 degress, find the length of the shortest side to the nearest tenth. Do not round till the final answer.

    asked by A on April 4, 2011
  22. chemistry

    For CH3CO2H, give the hybridization and approximate bond angles for each atom except hydrogen. Also, draw an orbital bonding picture. Show all lone pairs. Can this be drawn on paint and uploaded to me? Thank you.

    asked by kate on September 24, 2009
  23. Physics

    Suppose a traffic light weighing 1.00*10^2 N hangs from a vertical cable tied to two other cables that are fastened to a supposrt. The tensions T1 and T2 are both 80N. Find the new angles with respect to the horizontal axis.

    asked by Anonymous on October 27, 2009
  24. Science

    clarify why parallax just works for stars that r less than 200 light years away. It is because of the smaller angles involved in the greater distances, which cause to many observation errors for calculations to be valid. Please correct me if I'm wrong,

    asked by Sara on February 23, 2010
  25. 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
  26. 5th grade math

    A marathon race has 522 runners divided into 6 groups. What is a reasonable number of runners in each group? A 112, because 522/6 is about 550/5=110 B 98, because 522/6 is about 500/5=100 C 87, because 522/6is about 540/6=90 D 82, because 522/6 is about

    asked by dave on October 21, 2010
  27. Chemistry

    What mass of silver chloride can be prepared by the reaction of 160.0 mL of 0.25 M silver nitrate with 110.0 mL of 0.20 M calcium chloride? Calculate the concentrations of each ion remaining in solution after precipitation is complete. (Enter a 0 if none

    asked by Sam on March 14, 2013
  28. Physics

    A horse canters away from its trainer in a straight line, moving 110 m away in 16.0 s. It then turns abruptly and gallops halfway back in 5.4 s. (a) Calculate its average speed. m/s (b) Calculate its average velocity for the entire trip, using "away from

    asked by Jon Tres on August 30, 2018
  29. heat

    if the absolute pressure of a gas is 550.280 kPa, its gage pressure is ? A.101.325kPa b.277.280kPa c.448.955kPa d.651.605kPa Gauge pressure - atmosphericpressure=absolute pressure where atmospheric pressure varies, but standard atmospheric pressure is

    asked by Andre on July 15, 2005
  30. calculus

    When air expands adiabatically (without gaining or losing heat), its pressure and volume are related by the equation PV^1,4=C where C is a constant. Suppose that a a certain instant the volume is 520 cubic centimeters and the pressure is 99kPa and is

    asked by Ash on October 29, 2009
  31. 10th grade algebra not ms.sue

    a 68 mile trip uses 2 gallons of gas. how many gallons would you use on a 110 mile trip? round to the nearest tenth of a gallon.

    asked by natalie on November 12, 2009
  32. HELP!!!!!

    a 68 mile trip uses 2 gallons of gas. how many gallons would you use on a 110 mile trip? round to the nearest tenth of a gallon.

    asked by jean on November 12, 2009
  33. Math

    If a baseball and bat cost $110, and the bat costs $100 more than the ball, how much does the ball cost? I don't get it i say it's 10 but its not its 5 YYYYYYYYY

    asked by Daniel on March 22, 2017
  34. math

    How do I calculate how much in total (including the down payment) I will have paid for this condo when I know the total amount, the down payment, the mortgage, and the monthly payment?

    asked by Madeline on August 7, 2013
  35. Chemistry

    I need to determine the "percentage composition unknown" whatever that is. My current data: a) mass of test tube and foil cover: 7.5323 g b)temp of water bath: 375.65 K c) mass of test tube and foil and gas as sample: 7.5423 g d) barometric pressure:

    asked by Selina on November 4, 2010
  36. Growth model

    Hello everyone. My task is to build a growth model for a company. The company offers services to businesses - and thus allowing the businesses to recruit new clients. Assumptions: - I started working with 10 businesses - A business I start working with

    asked by Pete on August 9, 2009
  37. Physics

    An 100.0-N crate of apples sits at rest on a ramp that runs from the ground to the bed of a truck. The ramp is inclined at 29.0° to the ground. (b) The interaction partner of this normal force has what magnitude and direction? Magnitude 87.46 N Direction

    asked by Amy on May 21, 2012
  38. calculus

    C(q) = q3−60q2+1200q+760 for 0 ≤ q ≤ 50 and a price per unit of $551. Round your answers to the nearest whole number. a) What production level maximizes profit? q = b) What is the total cost at this production level? cost = $ c) What is the total

    asked by Anonymous on July 16, 2014
  39. physics

    You are riding in the back of an open pick-up truck in the snow as you pass your friend's house. Despite the fact that it is snowing you know that he has a habit of being in his bedroom with the light on and his bedroom window open. Being as you are riding

    asked by afia on September 23, 2014
  40. English

    Can someone check these sentences I need to prepare for tomorrow? Thank you. 1) Troy has been at the BRIT School since he was 14. Before that he was in a normal secondary school. 2) Unlike in a normal secondary school, students at the BRIT study all the

    asked by John on April 2, 2013
  41. Geometry 12

    What is the measure of the vertex angle of an isosceles triangle if one of its base angles measures 42° and its congruent sides each measure 9 cm? Please express your answer as a number only.

    asked by Kayla Druery on December 14, 2015
  42. Geometry

    If the sum of the measures of the interior angles of a n-sided polygon is 1,0800, then set up a mathematical model to find the number of sides of the polygon.

    asked by Summer. on June 3, 2015
  43. pre calc

    the longest side of a triangle is 34 feet. the measures of two angles of the triangle are 40 and 65 degrees. find the lengths of the other two sides using law of sines and cosines

    asked by g on April 29, 2011
  44. Pre-Calculus

    Determine the number of triangles that can be formed with the given information. and if it forms two possible triangles solve all unknown angles and sides Angle A=116 degrees a=10 b=11

    asked by DW on April 7, 2013
  45. physics/math

    Does the formula Sum of internal angles of a polygon = (n - 2)x180 degrees, where n represents number of sides, work for polygons of interacting sides?

    asked by sandhya on August 25, 2010
  46. Geometry

    8)Suppose that a given parallelogram is not a rhombus or a rectangle. Which of the following can you conclude about this parallelogram? A) Its diagonals are perpendicular bisectors of each other. B) It is a square. C) Its angles are not all congruent. D)

    asked by Don on May 23, 2010
  47. Math

    Find the area of a triangle on a spherical surface that has a radius of 3cm and angles that measure 75degrees, 160 degrees, and 142 degrees.

    asked by Em on April 29, 2015
  48. Math

    State the theorem or postulate that is related to the measures of the angles in each pair. Then find the angle measures. m∠3=(23x+11)°,m∠4=(14x+21)° Can you teach me this problem?? Please...

    asked by CC on August 31, 2016
  49. Physics, diffraction

    1. Yellow light of wavelength 580 nm shines on a diffraction grating with 4000 lines/cm. A.At what angles do the first-order and second-order maxima occur?

    asked by Jamie on April 8, 2013
  50. Math

    An object is acted upon by two forces, u and v, with direction angles €u and€v, respectively. Find the direction and magnitude of the resultant force. U= 30lb €u = 0degrees v= 90lb €v =60 degrees

    asked by Jace on November 14, 2012
  51. math

    What is the sum of the measures of the angles of a regular decagon? What is the measure of each angle in the decagon? 1,620°; 162° 2,880°; 288° 1,440°; 144° none of these

    asked by i will pay on February 12, 2018
  52. Pre-calc

    If llull=1 and llvll=3, and the vectors maek angles of 170 degrees and 130 degrees with the x-axis respectively, find the component form of the sum of u and V. Please help thanks!

    asked by Casandra on February 14, 2012
  53. physics

    A bag of cement of weight 370 N hangs from three wires Two of the wires make angles è1 = 58.6° and è2 = 23.8° with the horizontal. If the system is in equilibrium, calculate the tension T1.

    asked by Vishnu on October 11, 2008
  54. physics

    A stationary mass of 10 kg disintegrates explosively, with the evolution of 4.2*10^5 J, into three parts, two having equal masses of 3 kg. These two masses move at right angles to each other. Calculate the speed of the third part.

    asked by rikki on January 16, 2012
  55. Math

    Draw two scalene triangles that are not congruent, but have exactly five sets of parts (sides and angles) that are congruent. Make a drawing that is to scale. Label yourmeasurements.

    asked by Michelle on November 9, 2012
  56. physics

    a fire hose held near the ground shoots water at a speed of 6.5m/s at what angle should the ozzle point in order that the water land 2.5m away? why are there two different angles?

    asked by kelly on October 17, 2011
  57. Physics

    An optical fiber is made of a clear plastic with index of refraction n=1.6, For what angles with the surface the light remain contained within the plastic guide?

    asked by jo on January 4, 2015
  58. Physics

    A wheel has a radius of 100 cm. How far (path length) in meters does a point on the circumference travel if the wheel is rotated through angles of (a) 30°, (b) 60 rad, (c) 60 rev, respectively?

    asked by jack on February 10, 2017
  59. maths

    Rudransh has a piece of cardboard in shape of a quadrilateral. He cuts it into two triangles such that angles formed at the vertices are bisected. He wants to find out whether the two triangles are congruent or not

    asked by Anonymous on January 10, 2013
  60. GEOMETRY

    The sum of the measures of two exterior angles of a triangle is 264o. What is the measure of the third exterior angle? • 84o • 96o MY ANSWER?? • 112o • 124o

    asked by SANDRA on December 19, 2014
  61. physics

    A 3 point jump shot is released 2.2 m above the ground, 6.14 m from the basket, which is 3.06 m high. For launch angles of 30° and 60°, find the speed needed to make the basket.

    asked by talia on November 13, 2014
  62. math

    A jet A is flying above 2 ships B and C which are 18km apart. If the angles of depression of B and C from are 60 and 32 degrees respectively, find the height of the jet above the sea level, correct to the nearest m.

    asked by someonestupid on March 5, 2016
  63. Science

    What two angles of elevation will enable a projectile to reach a target 16 km downrange on the same level as the gun if the projectile's initial speed is 400m/sec ?

    asked by Siegrain on October 16, 2014
  64. ALGEBRA 2

    In triangle ABC , angle C is a right angle. Find the remaining sides and angles. Round your answers to the nearest tenth. Show your work

    asked by SAM on November 29, 2014
  65. Physics

    A gas is confined in a 0.47-m-diameter cylinder by a piston, on which rests a weight. The mass of the piston and weight together is 150 kg. The atmospheric pressure is 101 kPa. (a)What is the force (in Nt) exerted on the gas by the piston, the weight and

    asked by Thao on January 15, 2013
  66. criminal justice 255

    Describe and apply six law enforcement strategies from Chapter 6 of Defending the Homeland. For each: Label the strategy as proactive, reactive, or both. Describe the strategy: What is it, and what is required to execute the strategy? List the top

    asked by RAINY on December 6, 2007
  67. Experiment+ bio

    In the 1950s the heavy isotope of nitrogen (15N) and an ultracentrifuge were used in an experiment to investigate the manner in which DNA replicates. Bacteria were grown in a culture containing 15N nucleotides for several generations to ensure that only

    asked by Chalrey on December 12, 2006
  68. Fluid Mechanics

    A tank is 180cm long, 90cm deep and 90cm wide at the top, tapering to 30cm wide at the base. If the tank is completely filled with water, calculate: a) the total weight of the water in the tank b) The total force exerted by the water on the bottom c) The

    asked by Claire on November 2, 2010
  69. Stats, Statistics, Math

    A Statistics professor assigned 10 quizzes over the course of the semester. He wanted to see if there was a relationship between the total mark of all 10 quizzes and the final exam mark. There were 229 students who completed all the quizzes and wrote the

    asked by Papi on September 24, 2016
  70. Microeconomics - University of Boston

    4. If Cassandra bought 16 cotton blouses last year when her income was $40,000 and she buys 24 cotton blouses this year when her income is $50,000, then what is her income elasticity of demand? Interpret what the income elasticity of demand you just

    asked by Robert on October 17, 2012
  71. math

    Brenda has taken out a $1300 loan to pay for a hot tub. She will make monthly payments for a year at an interest rate of 10 %, compounded monthly. How much interest will she end up paying? Select one: a. $213.45 b. $71.49 c. $112.56 d. $110.89 What i don't

    asked by Miyabi123456789 on June 6, 2017
  72. Chemistry

    The vapor pressure, P, of a certain liquid was measured at two temperatures, T. Represented in a table: T (in Kelvin) ------- P(in kPa) [325] --------------- [4.00] [775] --------------- [8.59] What is the enthalpy of vaporization for this liquid? (Delta H

    asked by Eric on January 23, 2012
  73. Math

    The cost for a business to make greeting cards can be divided into one-time cost (e.g., a printing machine) and repeated costs (e.g., ink and paper). Suppose the total cost to make 30 cards is $800, and the total cost to make 550 cards is $1,300. What is

    asked by Anonymous on October 21, 2015
  74. math

    I need help calculating (a) the total installment price. (b) the carrying charges, and (c) the number of months needed to save the money at the monthly rate to buy the item below for its cash price (remember to round up). A bike with a cash price of $500,

    asked by Carly on January 26, 2010
  75. physics

    why is it that drivers place cement blocks and other heavy items in the trucks of their vehicles? (think of friction and normal force)

    asked by William on October 24, 2014
  76. Grammar

    There is normal DTRs noted on examination. The prosthetic hardware was freed from the surrounding tissues and removed. I think both sentences are ok as are.

    asked by Cathy on November 10, 2014
  77. Biology

    How does meiosis and fertilization in humans and other sexual reproductive organisms maintain the normal chromosomes number for each species?

    asked by Anonymous on April 9, 2016
  78. science

    when light travels from air into glass at an angle of incidence greater than o degrees, how is it bent in relations to the normal?

    asked by siva on December 6, 2013
  79. biology

    How does meiosis and fertilization in humans and other sexual reproductive organisms maintain the normal chromosomes number for each species?

    asked by Hannah on April 11, 2016
  80. math check

    Consider a normal population with ì = 49 and ó = 6. Calculate the z-score for an x of 44.2 from a sample of size 22. (Give your answer correct to two decimal places.) 3.75 is what I got.. and I have only one more try on this one.

    asked by Sue 74 on June 17, 2013
  81. statistics

    a standardized test has a mean of 88 and a standard deviation of 12. What is the score at thr 90th percentile? Assume a normal distribution.

    asked by cw on February 8, 2011
  82. chemistry

    The normal boiling point of Rh is 3727°C. What is its vapor pressure in mm Hg at 2914°C, if its heat of vaporization is 557.0 kJ/mol?

    asked by hershi on February 5, 2014
  83. Science

    The normal melting and boiling point of O2 are -218C and 49.8atm. a)Sketch the phase diagram for O2. b) Which is denser, O2(S) or O2 (l)? explain.

    asked by Joseph on August 21, 2010
  84. Statistics

    Find the number x such that the proportion of observations that are less than x in a Normal distribution with mean 100 and standard deviation 25 is 0.3. (Use 2 decimal places.)

    asked by Sarah Lacks on May 31, 2016
  85. biology

    what genotypes would I use on a punnett sqare to shoe a man(color blind) and a woman (homozgous for normal vision

    asked by debbie on February 25, 2009
  86. maths

    find equations for the tangent and the normal at P (1n2, 2k) on the curve with equation y=ke^x, where k is a constant. (b) given that y=sin^-1x, show that (1-x^2)d^2y/dx^2-xdy/ dx=0

    asked by gibbsm on October 6, 2013
  87. Math

    A district mathematics test for third-graders had a normal distribution with a mean of 74 and a standard deviation of 11. What percentage of students scored between 63 and 85?

    asked by Clement on February 15, 2016
  88. Math

    Find the z-scores that bound the middle 55% of the standard normal distribution ____ small value _____ larger value

    asked by Teresa on May 11, 2013
  89. math check

    Find the area under the standard normal curve between -1.32 and the mean, P(-1.32 < z < 0.00). (Give your answer correct to four decimal places.) 0.0968

    asked by Nora 62 on June 2, 2013
  90. stats

    Some IQ tests are standardized to a Normal model with a mean of 100 and a standard deviation of 16. About what percent of people should have IQ scores above 116?

    asked by Jamie on September 26, 2010
  91. Science - Pls Help! Thanks ' (:

    normal double glazing windows is made from two layers of glass with air trapped in between them. So How Can They Keep The House Warm ??

    asked by fern on January 11, 2009
  92. stat

    Find the area under the standard normal curve to the left of z = 1.88, P(z < 1.88). (Give your answer correct to four decimal places.)

    asked by janet on July 7, 2012
  93. Math

    Find the z-scores that bound the middle 55% of the standard normal distribution ____ small value _____ larger value

    asked by Teresa on May 11, 2013
  94. 12th

    Assuming a normal distribution of Blood pressure of a mean of 120 with standard deviation of 10, what person would be considered to be unusual ?

    asked by michael perez on November 10, 2015
  95. Math

    The functional determinant of x, e^x, and e^-x is equal to___ The orthogonal trajectory of y^2 - x^2 = C is__ The slope of the normal line to y^2 = x/2 at P(1/8,1/4) is ____ help please...

    asked by Alvin on December 14, 2009
  96. medical terminology

    the period of time when the uterus returns to its normal size is the? A) luteal phase B)menarche C)puerperium D)ovulation

    asked by ceecee on October 17, 2010
  97. Physics

    Why would normal force be set to zero to calculate the minimum possible speed a rider can have at the top of a loop. Please i need help, this is due in few hours

    asked by Ted on April 18, 2013
  98. calculus

    Given f(x,y,z)= use stokes theorem to determine the flux integral curlF dot ds, where S is the graph of z=9 - x^2 - y^2 for z>=0 , oriented by the upward normal. please help!

    asked by sam on December 15, 2014
  99. math

    Find two point on a circle x^2+y^2=1 where the slope of the tangent line is -2 write the equation for the normal lines at these points.

    asked by help on October 10, 2010
  100. statistics

    A population of scores forms a normal distribution with a mean of µ = 40 and a standard deviation of SD = 12. a. What is the probability of randomly selecting a score less than X = 34?

    asked by Anonymous on June 3, 2011