1. Algerbra please help

    Find the product. 1.(2x)(10x) A:20x*** B:12x C:20x² D:5x 2.-3m(m+8) A:-3m²+24 B:-3m²-24m C:-24m² D:-4m+5*** 3.4d(2d-9) A:8d-36d B:-d C:-28d²*** D:8d²-36d 4.Find the area of the rectangle. 7x+1 ________________ | | | | | | 8x |________________|

    asked by Gummy Bears on May 16, 2015
  2. science/ chemistry

    Ethane (C2H6) is one of the many products of combustion of iso-octane, an important component of petrol. After release into the atmosphere, it is attacked by the hydroxyl radical, HO•, leading to its oxidation in the cycle of reactions when in a NOx-rich

    asked by Nicolas on September 14, 2008
  3. math CA

    1. What are the next two terms in each sequence? 2, 4, 8, 14, 22, … (2 points) 30, 38 30, 40 32, 44 32, 46 2. What are the next two terms in each sequence? 1.3, 2.4, 3.5, 4.6, … (2 points) 5.7, 6.8 5.8, 6.9 6.7, 7.8 7.8, 8.9 3. For questions 3–4, use

    asked by Jesicca on March 14, 2011
  4. MICROECONOMICS

    Suppose you currently earn 30,000 a year. you are considering a job that will increase your lifetime earnings by 300,000 but that requires an MBA. The job will mean also attending business school for two years at an annual cost of 25,000. you already have

    asked by LANINA on May 6, 2011
  5. physics

    You set out to design a car that uses the energy stored in a flywheel consisting of a uniform 97-kg cylinder of radius R that has a maximum angular speed of 330 rev/s. The flywheel must deliver an average of 1.70 MJ of energy for each kilometer of

    asked by Jack on November 7, 2012
  6. micro economic

    Suppose you currently earn $30,000 a year. You are considering a job that will increase your lifetime earnings by $300,000 but that requires an MBA. The job will mean also attending business school for two years at an annual cost of $25,000. You already

    asked by Thu Nguyen on August 27, 2018
  7. Math

    Please show me how to set this up and how to solve. Thanks in advance. At the local ballpark, the team charges $5 for each ticket and expects to make $1,300 in the concessions. The team must pay its players $1800 and pay all other workers $1500. Each fan

    asked by Mary on February 4, 2012
  8. Solar energy

    Consider a crystalline PV module with the following output parameters mentioned at STC (Standard Test Conditions) conditions by the manufacturer. Pmax = 300 W Voc = 40 V Isc = 8 A NOCT = 40°C Temperature coefficient of power = -2 W/°C If the ambient

    asked by Kavitha on November 10, 2014
  9. Dynamics

    A series of small packages are being moved by a thin conveyor belt that passes over a 300-mm radius idler pulley. The belt starts from rest at time t=0 and its speed increases at a constant rate of 150mm/s^2. Knowing that the coefficient of static friction

    asked by Hal on April 7, 2008
  10. English

    Could you plase check these sentences for me? Thank you. 1) She paid the gardener 300 Euros. She always boasts about her excellent school performances. 2) She jokes about my absent-mindedness. She sulks about being left alone (??): I need to give example

    asked by Henry2 on October 21, 2011
  11. cwi

    The sum of the measures of the angles of any triangle is 180 degrees. In triangle ABC, the measure of angle A is 70° more than the measure of angle B. The measure of angle B is twice the measure of angle C. Find the measure of each angle.

    asked by JJd on May 30, 2016
  12. Physics

    Suppose you are drifting on a lake in a boat that measures 1 m high, 1 m wide, and 3 m long. The water level reaches halfway up the boat. 1. What is the volume of water that is displaced by the boat? (density of water = 1000 kg/m^3 or 1.00 g/cm^3). 2. What

    asked by Anonymous on November 10, 2010
  13. 5th Gr Math

    Mikail used 220 inches of wire to make this figure. The figure is made up of 2 indentical triangles, a 15 inch by 12 inch rectangle & a square of side 19 inches. What is the length of 1 side of each triangle if all the sides of the triangles are equal in

    asked by Ryan on November 12, 2012
  14. accounting

    My friend Robert Hughes runs hardware business in down town Dallas. Because of competition he relies on neighborhood customers for sales. From inception of operations to December 31, 2010, Robert Hughes Hardware Company provided for uncollectible accounts

    asked by adam on October 16, 2011
  15. Child Psychology

    I need someone to let me know if I answered these two questions correctly. 1st Question Amy knows that when she runs over and stands quietly by her grandfather's chair, he will reach over and tickle her under her chin. When a child learns to behave in a

    asked by Sharon on July 20, 2011
  16. math

    A suitcase measures 22 inches long and 16 inches high. What is the diagonal length of the suitcase to the nearest foot. 16^2 + 22^2 = C^2 256 + 484 = C^2 740 = C^2 SQRT of 740 = 27.20 in. The diagonal length to the nearest foot equals 2.26ft.

    asked by David on June 8, 2016
  17. math

    A suitcase measures 22 inches long and 16 inches high. What is the diagonal length of the suitcase to the nearest foot. 16^2 + 22^2 = C^2 256 + 484 = C^2 740 = C^2 SQRT of 740 = 27.20 in. The diagonal length to the nearest foot equals 2.26ft.

    asked by David on June 8, 2016
  18. Physics

    A double-slit experiment using violet light of wavelength 400 nm produces a spacing of (triangle x). what is expected spacing if red light of wavelength 600 nm used? a) 2/3 (triangle x) b) (triangle x) c) 1.5 (triangle x) d) 3 (triangle x)

    asked by Jessey on January 7, 2018
  19. statistics

    Please advise-Thank you. The Center for Urban Transportation research released a report stating that the average commuting distance in the United States is 10.9 miles Suppose that this average is actually the mean of a sample of 300 commuters and that the

    asked by vera on April 21, 2012
  20. algebra1

    Betty wishes to bulid a rectangular dog runalong the side of her garage. The garagewill be on of the longer sides of the run. If she has 50 feet of fenccing and wishes the run to be 3 times longer than i is wide, how many square feet will the fencing

    asked by john101 on September 5, 2007
  21. Physics

    A space vehicle travelling at a velocity of 6000km/h separates into two parts of mass 1200 kg and 300 kg. The two parts continue moving in the same direction with the lighter section moving at 6200km/h. Making use of the principle of conservation of

    asked by Robert on June 10, 2018
  22. chemistry

    What is the concentration of Ag+ remaining in solution? Calculate the following when 0.250 L of 0.249 M AgNO3 solution is mixed with 0.350 L of 0.300 M Na2CO3 solution. Ksp for Ag2CO3 is 8.46E-12. A) What mass of the precipitate forms? I found out the

    asked by hellp on March 31, 2012
  23. Organic Chemistry

    A 1.0 gram sample of aspirin will dissolve in 300 mL of water and in 17 mL of chloroform at 25 deg C. a. What is the solubility of aspirin in each solvent expressed in g/mL? (show your calculations) I don't know where to start, does the molecular weight

    asked by Kyle on February 17, 2015
  24. Alegra 2

    A baseball is hit at a point of 3 feet above ground at a velocity of 100 feet per second and an angle of 45 degrees. The path of the baseball is h(x)= -0.0032(x-156.25)squared+87, where x and h(x) are measured in feet. A. what is the baseball's maximium

    asked by Emily on October 23, 2011
  25. 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 26, 2009
  26. Consumer math

    Complete the chart to find the mean, variance and standard deviation. Remember to use commas and round numbers to the nearest tenth. X _ X _ X - X _ (X - X)2 1. 900 = 466.2 = The mean is 2. 35 = -398.8 = 159,041.4 The median is 3. 500 = 66.2 = The variance

    asked by yamilex on December 11, 2012
  27. finance part 2

    11. Whit a Subchapter S corporation A. corporate income is taxed as directed income to stockholders B. stockholders have the same liability as members of a partnership C. the number of stockholders is unlimited D. life of the corporation is limited 12.

    asked by Jason on July 23, 2008
  28. english

    I need help. I need to revise any run-on sentences. The first one is this. Not sure if these are correct. Death Valley National Monument located in Southern California and Nevada, is one of the hottest place on earth. Temperatures there have soared as high

    asked by Roger on June 10, 2010
  29. Math

    1) Each side of a triangle is a different length. One side is 6, one side is more than 6, and one side is less than 6. The perimeter of the triangle could not be... a.13 b.18 c.22 d.24 2)Which of the following could not be the measures of two of the three

    asked by Bell on July 29, 2015
  30. microeconomics

    How the technical rate of substitution and marginal product are related and what is their difference? i only wrote their definitions The technical rate of substitution measures the rate which the firm has to substitute one input for another, for keeping

    asked by liza on December 21, 2012
  31. health

    Write a 300-500 word essay on what you have learned. The essay should have an introduction that states your thesis. Representation and style are general concepts to keep in mind when you develop your points. End your assignment with a strong conclusion

    asked by Nani on August 11, 2015
  32. College Math

    In a certain triangle the measure of one angle is triple the measure of a second angle but is 110 degrees less than the measure of the third angle. [The sum of the measures of three interior angles of a triangle is always 180 degrees.] What is the measure

    asked by Richard D on October 11, 2012
  33. Chemistry

    cube of aluminum that measures 5 cm on each side is added to a 500 ml- graduated cylinder containing 200 ml of water.  What is the new level of the water in the graduated cylinder after the cube of aluminum is added?  

    asked by Sammie on September 28, 2015
  34. statistics

    The alternative hypothesis for an independent-measures t test states ______. a. There is no mean difference between the two populations being compared. b. There is no mean difference between the two samples being compared. c. There is a non-zero mean

    asked by Robbie on November 11, 2012
  35. Biology

    For my Biology Lab I have to create a graph showing my results. We used an enzyme, and put in a substrate (H2O2). Every 10, 30, 60, 90, 120, 180, and 360 second H2O2 was killed with acid. To measure the amount of H2O2 we used KMnO4. Now to the question. I

    asked by John on September 23, 2008
  36. Math

    A geosynchronous equatorial orbiting satellite orbits 22,300 miles above the equator of Earth. It completes one full revolution each 24 hours. Assume Earth's radius is 3960 miles. a. How far will the GEO satellite travel in one day? b. What is the

    asked by Mike on November 18, 2007
  37. trigo

    A submarine at the surface of the ocean makes an emergency dive, its path making an angle of 21deg with the surface. a. If it goes for 300 meters along its download path, how deep will it be? What horizontal distance is it from its starting point? b. How

    asked by trigofunctions on August 3, 2010
  38. Business math

    The clarkdell school system has three schools. School #1 has 500 students School #2 has 600 students School #3 has 400 students What part of a $15,000 allocation will go to school #2? 15,000 divide by 3= $5,000 Will you check my answer?

    asked by Devon on February 21, 2015
  39. math

    1.Julio bought a backpack for $39.95 and 2 belts for $17.99 each. The sales tax is 6.5%. How much did Julio spend for all the items, including tax? A $61.71 B $75.93 C $80.87 D $98.01 2. not posted 3.Each year on the same day, Susan deposits $275 into a

    asked by anonymous on January 30, 2016
  40. Math

    Corey wants to buy grass seed for his yard, which measures 252 square feet. Each bag of grass seed covers 12 square feet. What fraction of his yard will one bag of seed cover?

    asked by Amari on May 13, 2015
  41. Statistics

    A researcher measures how positive a person’s mood is and how creative he or she is, obtaining the following interval scores: Participant Mood X Creativity Y 1 10 7 2 8 6 3 9 11 4 6 4 5 5 5 6 3 7 7 7 4 8 2 5 9 4 6 10 1 4 (a) Compute the statistic that

    asked by Jessica on February 10, 2014
  42. Statistics

    A researcher measures how positive a person’s mood is and how creative he or she is, obtaining the following interval scores: Participant Mood X Creativity Y 1 10 7 2 8 6 3 9 11 4 6 4 5 5 5 6 3 7 7 7 4 8 2 5 9 4 6 10 1 4 (a) Compute the statistic that

    asked by baegirl on June 13, 2015
  43. physics

    When serving, a tennis ball is almost motionless when it is slammed by the racquet. A force sensor in an experimental tennis racquet measures a force of 80 N during the impact with a 0.058 kg tennis ball. The impact lasts for 0.04 seconds. If the ball was

    asked by Anonymous on June 1, 2013
  44. Math

    VWXYZ is a rectangle-based pyramid where WX = 66 cm and XY = 32 cm. The vertex is vertically above the center of the base. GIven that the slant heights of VA and VB are 56 cm and 63 cm respectively, find the total surfact area of the pyramid. Additionally,

    asked by Atilla on January 23, 2011
  45. Math

    The vertical backboard located 4ft from the baseline supports the rim of the basketball net. The backboard measures 6ft wide by 4ft high. The shooter's square is a white box above the rim of the basket. It must measure 1 1/2 ft high and 2ft wide. What is

    asked by Robert on May 15, 2015
  46. engineering

    I am studying Fire Science Engineering. I have a question concerning my homework. The question is A compartment measures 3 meters by 5 meters and is 2.8 meters high. A fire raises the temperature from 20 degrees C to 1000 degrees C. If the starting

    asked by Deborah on October 29, 2011
  47. Physics

    The engineer of a passenger train moving at 29.0 m/s sees a freight train 360.m ahead on the track moving at 6.00 m/s. The engineer takes 0.400 seconds to react, and then applies the brakes. At what rate must the passenger train then decelerate in order to

    asked by Bob on January 7, 2017
  48. Physics. Appreciate the help I can get.

    A 400.0 kg mass experiences a horizontal push force of +720 N and a friction force of 320 N. A) assuming the mass is initially moving at 5.0 m/s how far will it travel in 6.0s? B) how much work does the 720.0 Newton force do over the distance determined in

    asked by Jenny on October 20, 2015
  49. math

    A factory can produce two products, x and y, with a profit approximated by P = I think it's b but I'm not really sure. Can someone show me how to do this or let me check my answer? :) 14x + 22y – 900. The production of y can exceed x by no more than 200

    asked by Alex on September 17, 2012
  50. M A T H

    A small plant manufactures riding lawn mowers. The plant has fixed cost (leases, insurance, etc.) of $48,000 per day and variable cost (labor, materials, etc.) of $1,400 per unit produced. The mowers are sold for $1,800 each. So the cost and revenue

    asked by Anonymous on April 13, 2014
  51. Chemistry

    How would you solve this problem? C4H8(g)--> 2C2H4 Determine the order of the reaction and the rate constant based on the following pressures, which were recorded when the reaction was carried out 430 C in a constant volume vessel. Time (s) P(C4H8)(mmHg) 0

    asked by Jane on July 17, 2010
  52. math

    Elisa surveyed people in her neighborhood about whether they would like to have a swimming pool in their community park. Of those who responded, 65% were in favor of having a swimming pool. Based on these results, which statement could be true? A. Elisa

    asked by Brooke on April 9, 2015
  53. Dr.Bob (about finding the ml of ethanol)

    ~From before since the question's been bumped to the next page. Just copied and paste with added stuff. I'm confused as to what to do for the calculations for my lab. Lab: Semimicroscale crystalization-erylenmyeyerflask and Hirsch Funnel Weigh 0.30g of

    asked by ~christina~ on September 3, 2007
  54. English

    1. I will be 17 years old next year. 2. I would be 17 years old next year. (Is #2 corect? When can we use 'would'?) 3. The river runs south. 4. The river flows south. (Are both OK?) 5. We have dinner when she arrives. 6. We will have dinner when she

    asked by John on December 30, 2008
  55. Math

    A Woman has cat's and birds. When asked how many of each she has she answers... " I have between both cats and birds 400 feet and 232 eyes.(Cats have 4 feet and Birds have 2 feet) How Many Total? How many Birds? How many Cats? Please help me solve this.

    asked by Michelle on September 21, 2011
  56. Math

    A company selling cell phones has a total inventor of 800 phones. Of these phones, 400 are smartphones and 240 are black. If 200 phones are not black and not a smartphones, how many are black smartphones?

    asked by Anonymous on July 10, 2016
  57. Kennedy King

    7. You are scheduled to receive a $750 cash flow in one year, a $1,000 cash flow in two years, and pay a $300 payment in four years. If interest rates are 6 percent per year, what is the combined present value of these cash flows?

    asked by Dashawn on October 13, 2014
  58. PHYSICS DUE SOON

    In each cycle of its operation, a heat engine expels 6,100 J of energy and performs 1,300 J of mechanical work. (a) How much thermal energy must be added to the engine in each cycle?_____J (b) Find the thermal efficiency of the engine.____%

    asked by Ame on November 29, 2012
  59. Math/Probability/Statistics

    Find the expected value and the standard deviation in the following raffle: Value Tickets Grand Prize: $2,000.00 1 Second Place Prize: $800.00 20 Third Place Prize: $40.00 60 Fourth Place Prize: $30.00 300 Total Number of Tickets Sold: 10000

    asked by Anonymous on October 22, 2015
  60. MATH

    A spinner is divided into equal parts 1-5. George spun the spinner 300 times. A table of outcomes is shown. Part- Times Spun 1 - 42 2 - 66 3 - 63 4 - 72 5 - 57 Based on the table, what is an estimated probability of the spinner landing on an even number?

    asked by roma on May 11, 2016
  61. Math

    A survey asked a group of students to list their eye color. The results of the survey are shown in the graph. Based on the graph, how many more students in a class of 300 students would be expected to have green eyes than blue eyes? A) 10 B) 20 C) 50 D) 90

    asked by ItsBeeboBaby on November 29, 2018
  62. Geometry Honors

    Problem: A triangular lot has two sides of length 100m and 48m as indicated in the figure below. The length of the perpendicular from a corner of the lot to the 48m side is 96m. A fence is to be erected perpendicular to the 48m side so that the area of the

    asked by Ryan on March 15, 2016
  63. Physics Homework

    Consider problem U concerning the geosynchronous satellite of mass 50 kg. It orbits at a radius of 42,300 km with a speed of 3076 m/s. a) How much energy is needed to lift the satellite from the earth's surface (Re=6,370 km) up to that radius? b) How much

    asked by Eli Smith on October 20, 2013
  64. math

    A sector of a circle subtending an angle 300 degrees at the centre is used to form a cone with base radius 6cm. Find the (a.)radius of the circle (b.)volume of the cone (c.)area of the minor sector of the circle

    asked by shegster on April 30, 2014
  65. statistics

    Assume the lifespan of light bulbs manufactured by Bright Inc. can be modeled with a normal distribution with a mean of 300 days and a standard deviation of 40 days. 70% of light bulbs produced by Bright Inc. survive longer than how many days?

    asked by Saralynn Niealsen on September 21, 2016
  66. physics

    A mass of 300 g is attached to a string that is 1.21 m in length. The mass is whirled in a horizontal circle on a surface and completes 7.00 rotations in a time of 2.71 s. The force of tension in the string is 92.7 N. Determine the force of friction

    asked by myra on April 25, 2012
  67. Physics

    a ball is thrown upwards from a tower standing 300 feet tall. the initial velocity of the ball is 32 feet/second. the negative acceleration of the ball due to gravity is -16 in terms of feet per second squared. What is the velocity of the ball after 1

    asked by Hannah on April 28, 2017
  68. Health

    1. In a soccer game, the coach of the home team realizes her players are not as highly skilled as the other team and she wishes to avoid a high scoring game which she believes her team will not win. How can she apply coaching tactics to give her team the

    asked by Carly on December 15, 2016
  69. math - quadratic problems

    1. What must be the dimensions of a rectangle to have an area 125m^2 and a perimeter of 60m? 2. In a right angle the hypotenuse is 15cm. if the second side is twice the length of the third side, calculate the exact length pf the shortest side. 3. THe

    asked by need help with all on February 22, 2018
  70. more of the same

    The answer to this should be 201.7, but I keep getting off track. 300=70+(375-70) e^ -k*10 230=305 e^-10*k ln 230=ln 305 e^-10*k ln 230= ln 305 -10*k

    asked by Phoebe on March 4, 2013
  71. Physics

    A drag racer crosses the finish line of a 400.0-m track with a final speed of 104 m/s. (a) Assuming constant acceleration during the race, find the racer’s time and the minimum co efficient of static friction between the tires and the road. (b) If,

    asked by John on September 6, 2011
  72. Physics

    A drag racer crosses the finish line of a 400.0-m track with a final speed of 104 m/s. (a) Assuming constant acceleration during the race, find the racer’s time and the minimum co efficient of static friction between the tires and the road. (b) If,

    asked by John on September 22, 2011
  73. eth

    The final project for ETH 125 is a 1,400- to 1,750-word autobiographical research paper on race in your community. The CheckPoints and assignments in class are designed to stimulate your awareness of cultural diversity issues, so, as you craft your final

    asked by Anonymous on November 24, 2007
  74. math

    A 4 ft spring measures 8 ft long after a mass weighing 8 pounds is attached to it. the medium through which the mass moves offers a damping force numerically equal to sqrt.2 times the instantaneous velocity. Find the equation of motion if the mass is

    asked by pam on February 26, 2012
  75. math

    a class wanted to cover part of their wall with beatiful tiles, the tiles are square ,one foot on each side ,if the wall to be covered is in the shape of a 10 foot by 12 foot rectangle ,how many tiles will be needed to cover the wall ?

    asked by thania on April 3, 2015
  76. math

    Rectangle WXYZ is drawn on triangle ABC, such that point W lies on segment AB, point X lies on segment AC, and points Y and Z lies on segment BC, as shown. If

    asked by G on March 21, 2015
  77. Algebra

    The stove in the kitchen must be kept at 350 degrees F. to bake a cake. the cake is suppose to be complete in 25 minutes. But it is taking longer because the stove is 50 degrees lower(300) away from what it is suppose to be. So how long will it tale for

    asked by ECPrice on March 29, 2007
  78. Math

    How to multiply 208 by 37? 208 x 37 = (200 + 8) x (40 - 3) = 200x40 - 200x3 + 8x40 - 8x3 = 8000 - 600 + 320 - 24 = 7400 + 320 - 20 - 4 = 7400 + 300 - 4 = 7700 - 4 = 7696 208 x37 ____ 1456 624 ---- 7696

    asked by Chandni on December 25, 2006
  79. math

    I am prepping for a mid-term. A deep sea diving bell is lowered at a rate (constant). After 10 min, the bell is at a depth of 300 ft. After 30 min the bell is at a depth of 1400 feet. What is the ave. rate of lowering per minute? Thanks

    asked by bill on November 3, 2017
  80. Math

    Jamie is a quality control specialist. He is required to check 180 rubber balls out of a shipment of 18,000for defects. He finds that 3 are defective. Of the balls in the bin, he predicts there will be 300 balls defective. What percent if the rubber balls

    asked by Sarah on December 1, 2011
  81. Physics

    A bloc of 10 kg is put at the top of an inclined plan of 45 degrees (to the left), attached to a spring which has a spring constant of 250 N/m. The coefficient of kinetic friction between the bloc and the surface of the inclined plan is of 0,300. What is

    asked by Raf on February 1, 2012
  82. Math

    Jamie is a quality control specialist. He is required to check 180 rubber balls out of a shipment of 18,000for defects. He finds that 3 are defective. Of the balls in the bin, he predicts there will be 300 balls defective. What percent if the rubber balls

    asked by Sarah on December 1, 2011
  83. physic

    Two volleyballs, each of mass 0.300 kg, are charged by an electrostatic generator. each is attached to an identical string and suspended from the same point, as shown in Fiq.2. They repel each other and hang with separation 50.0 cm. The length of the

    asked by sila on January 29, 2014
  84. Math

    The cost of a new car is $16,000, which can be financed by paying $3000 down $300 per month for 60 months. Use the actuarial method to find the unpaid interest. Instead of making the thirty-sixth payment, the borrower decides to pay the remaining balance

    asked by anthony on December 2, 2009
  85. Physic II

    Two volleyballs, each of mass 0.300 kg, are charged by an electrostatic generator. each is attached to an identical string and suspended from the same point, as shown in Fiq.2. They repel each other and hang with separation 50.0 cm. The length of the

    asked by sakne67 on January 26, 2014
  86. Physic

    Two volleyballs, each of mass 0.300 kg, are charged by an electrostatic generator. each is attached to an identical string and suspended from the same point, as shown in Fiq.2. They repel each other and hang with separation 50.0 cm. The length of the

    asked by Alia on January 27, 2014
  87. Geology

    If the decay constant for radioactive decay of ^40 K is λ = 5.543*10^(-10) / year, use this equation to calculate ages of the samples in the following table: t(1/2) = 0.693/λ 1)What is the half life of 40K? table -----Np --- Nd---- Nd/Np

    asked by Maura on November 21, 2013
  88. physics

    Speed in air is 340m.s Siren of ambulance emits waves of frequency 980Hz A detector at the scene measures the frequency as 1050Hz h0w d0 I w0rk this 0ut 1050 = 340 / 340 - vs (980) 1050 = 1 - vs (980) 1050 = -vs (980) 1050 + vs = 980 1050/1050 + vs = 980 /

    asked by angel on November 5, 2014
  89. enhancing children's self-esteem

    16. The best "measure" that a person has achieved high self-esteem is a. a record of strong academic performance b. confidence in a social situation c. self- sufficiency d. strong family relationships 10. When setting guidelines or rules for children and

    asked by Beth on May 8, 2011
  90. precal

    Rebecca and Tom Payton have decided to buy a home that costs $200,000. The Paytons can put down 20% of the home's price. They have applied for a 15-year, 9% FRM to finance the balance. They Paytons have a combined gross annual income of $70,000. A.)$

    asked by Anonymous on September 11, 2010
  91. Physics

    The problem goes like this... You are pushing a shopping cart at a constant speed. The handle makes an angle of 30.0 degrees with the horizontal and the friction in the cart has a coefficient of 0.400 to account for all the axles, etc. The mass of the cart

    asked by Fatima on December 22, 2010
  92. business

    The table given below provides the shipping costs and supply available at each source. Find the minimum-cost shipping solution for the transportation problem. Provide a table of shipping quantities and the minimum value for the objective function for the

    asked by Anonymous on July 24, 2010
  93. math

    the daily production of two factories A and B are 300 and 200 bottle respectively .2% of the product o f each factory are found to be defective .if 6 defective bottle are randomly selected from a daily production of A and B .find the probability that 4 of

    asked by david on April 9, 2017
  94. business math

    a computer store sold 300 items -store sold 6 times asa many hard drives as theyn did cd-rom drives and half as many floppy dtives as hard drives how many of each item

    asked by judy on May 16, 2010
  95. math

    A rock is dropped from a 600 foot tower. The height of the rock as a function of time can be modeled by the equation: h(t) = −16t 2 + 600. During what period of time will the height of the rock be greater than 300 above the ground?

    asked by Anonymous on March 9, 2016
  96. Physics

    In each cycle of its operation, a heat engine expels 6,100 J of energy and performs 1,300 J of mechanical work. (a) How much thermal energy must be added to the engine in each cycle? (J) (b) Find the thermal efficiency of the engine. (%)

    asked by Sam on November 26, 2012
  97. statistics

    On a standard measure of hearing ability, the mean is 300 and the standard deviation is 20. Give the Z scores for persons who score (a) 340, (b) 310, and (c) 260. Give the raw scores for persons whose Z scores on this test are (d) 2.4, (e) 1.5, (f) 0, and

    asked by Gregory on June 29, 2009
  98. Chemistry

    During a titration experiment, a 150.0 mL solution of 0.05 M sulfuric acid (H2SO4) is neutralized by 300.0 mL solution with an unknown concentration of sodium hydroxide (NaOH). What is the concentration of the sodium hydroxide solution? The answer I got

    asked by Summer on March 24, 2018
  99. math

    a vase in the shape of a cube has a side measuring of 7 inches which of the numbers below is the best estimate of how much water it will hold? a 125 in3 b 200 in3 B 200 in3 c 300 in3 d 350 in3 d 350 in3

    asked by marquis on February 28, 2008
  100. Chemistry

    For the theoretically perfect reaction 2H² +O²---2H²O if you react 300 molecules pf hydrogen and 200 molecules of oxygen, how many oxygen molecules will you have that do not engage in the reaction? Answer 50, 100, 150, or 200?

    asked by Help!! on January 31, 2013