Questions Asked on
May 21, 2014

  1. physics

    A uniform rod 30cm long is pivoted at it's center. A 40N weight is hung 5cm from the left end. where must the 50N weight be hung to maintain equilibrium?

  2. thermodynamics

    design a 1200-W electric hair dryer such that the air temperature and velocity in the dryer will not exceed 50 C and 3 m/s respectively

  3. maths/permutation and combination

    Find the number of ways, the digits 0,1,2 and 3 can be permuted to give rise to a number greater than 2000. Please I need an explanatory workings!!!

  4. Life sciences, Business studies,Maths lit and CAT

    With Life sciences, Business studies,Maths lit and CAT, what can I study after matric? Which career field should I follow?

  5. Physics -- check answers please

    The earth's magnetic field a) is slightly off centre compared to the Earth's rotational axis of rotation b) has its magnetic south pole at the geographic north pole c) attracts the north end of the compass needle to the geographic north pole d) all of the

  6. Calculus

    a rectangular storage area is to be constructed along the sides of a tall building. A security fence is required along the three remaining sides of the area. What is the maximum area that can be enclosed with 1000m fencing?

  7. math ~dont know all but check some~ pls help!!!

    1. Draw a model to represent the polynomial x2 + 2x + 4. (1 point) 1 big square, 1 tall rectangle, 4 little sqaures 1 big square, 2 tall rectangles, 4 little sqaures in the shape of an "L" 2 big sqaures, 4 little squares none of these 2. Simplify the

  8. Algebra

    Participants in a study of a new medication received either medication A or a placebo. Find P(placebo and improvement). You may find it helpful to make a tree diagram of the problem on a separate piece of paper. Of all those who participated in the study,

  9. Economics Help

    An example of a positive externality is A. noise B. crime C. parks D. trash I think the answer is C. Parks. Will someone tell me if i'm wrong or right please.

  10. physics

    A man stands on his balcony, 120 ft above the ground. He looks at the ground, with his sight line forming an angle of 50 degrees with the building, and sees a bus stop. The function d = 120 sec θ models the distance form the man to any object given his

  11. Spanish

    Hola Sra. Do these look ok? Part I ¿Conoces esta foto? 1. Es una vista del interior de la Mezquita de Córdoba. Tomando en cuenta la información en las secciones de Cultura en contexto (semanas 2 y 11) y los textos culturales Sevilla monumental y La

  12. statistic

    A survey of households in a small town showed that in 500 of 1,200 sampled households, at least one member attended a town meeting during the year. Using the 95% level of confidence, what is the confidence interval for the proportion of households

  13. English

    14. Read the following lines from Edgar Allan Poe's "The Raven" And the Raven, never flitting, still is sitting, still is sitting On the pallid bust of Pallas just above my chamber door; And his eyes have all the seeming of a demon's that is dreaming, And

  14. Physics Please help3

    A point charge with charge q1 = 3.10μC is held stationary at the origin. A second point charge with charge q2 = -4.60μC moves from the point ( 0.160m , 0) to the point ( 0.270m , 0.255m ). How much work W is done by the electric force on the moving point

  15. English

    Which of the following parenthetical citations is placed and punctuated correctly? A.) Edgar Allan Poe was morn in Massachusetts in the early nineteenth century (Freeman 311). ********** B.) Edgar Allan Poe (Freeman 311) was born in Massachusetts in the

  16. English

    choose the word that best completes the sentence. 1. One of the boys forgot backpack outside in the rain. his*************************** its their they Sandra went to the movies with David and me. I.***************************** we. they. Yhough they were

  17. Statistics/Probability

    So I tried solving the first one and apparently failed miserably, attempted both twice and got it wrong each time and I have one submission attempt left, so any help is definitely appreciated! 1. Hotels R Us has kept the following recordes concerning the

  18. English

    10. For what reason doe Shirley Jackson likely use stock characters in "The Lottery?" A.) to draw attention to the story's plot and theme******************************** B.) to teach readers about stock characters C.) to order events in the story D.) to

  19. English

    Read the following lines from Marge Piercy's "To Be of Use" The people I love the best Jump into work head first without dallying in the shadows and swim off with sure strokes almost out of sight. They seem to become natives of that element, the black

  20. science

    What does selectively permeable mean???? A. selectively permeable means not letting anything in or out. B. selectively permeable means letting everything in and out. C. selectively permeable means only letting things in but never letting anything out. D.

  21. Math - Inequalities

    Please help with the following: What is an open dot, and what is a closed dot? Also, when are they used in inequalities? I am not really sure about what they are. The lesson has not taught me anything about open dots and closed dots. I have also looked

  22. Science help!!!!

    Passive transport involves movement of substances. A. from areas of lower concentration to area of higher concentration B. from areas of higher concentration to areas of lower concentration C. from areas in which the concentration has reached a balance D.

  23. English

    Identify the incorrectly punctuated sentence. A.) I went to the library and checked out two books, a movie, and an audio recording. B.) I promised to be on time for the are show so that I could help sign up the participants. C.)I want to learn more about

  24. English

    Choose the topic that best limits the broad subjects music. A.) famous pianists B.) modern rap music C.) history of the harmonica D.) history of "The Star-Spangled banner" Not sure on this one. Please help Thanks.

  25. English

    Use your knowledge of prefixes and suffixes to determine the meaning of the bolded word in the sentence below. The salmon began their PERILOUS journey upstream. A.) without B.) forward advance C.) able to survive D.) full of danger**********************

  26. Science Check Answers?

    Which of the following best summarizes the function of the respiratory system? A. to transport oxygen to cells and wastes away from cells. B. to protect the organs in the chest cavity C. to move oxygen from the air into the body and carbon dioxide from the

  27. Math

    Suppose you spin a spinner that is equally likely to land on any one of the numbers from 1 to 8. Which event has the same probability as P(not 2 or 3)?

  28. English

    Identify the word that has an error in capitalization. Destini plans to study engineering at Stanford university. A.) engineering B.) Stanford C.) university**************************** D.) no error Did you know that the largest lake in North America is

  29. Algebra! Plz help~!

    You have the numbers 1-25 written on slips of paper. If you choose a slip at random, what is the probability that you will select a number that is divisible by 5? You have the numbers 1-24 written on slips of paper. If you choose a slip at random, what is

  30. Science (A&P)

    Trace the path of food from the mouth to the large intestine and what occurs at each structure. Anything would be helpful because I am having trouble finding the answer.

  31. Math

    Amita decides that she wants the molds to have a square base.How many of the possible molds can she use?

  32. Science Check Answer?

    1. Name the components of the respiratory system in the order incoming air would encounter them during breathing. A. trachea, pharynx, larynx, alveoli, bronchi B. bronchi, larynx, alveoli, trachea, pharynx C. larynx, trachea, bronchi, pharynx, alveoli D.

  33. furthermathematics

    a particle is projected at an angle tita to the horizontal with an initial velocity U.if the maximum horizontal distance travelled is 20m and the greatest height reached is 10m.find U and Tita

  34. English

    Identify the correctly punctuated sentence in each group. A.) Do you know where Bailey shoes are? B.) Do you know where Bailey's shoes are?* C.) Do you know where Baileys' shoes are? D.) Do you know where Baileys's shoes are? A.) The man said Turn right at

  35. English

    Use context clues to determine the meaning of the bolded word in the sentence below. Her enormous job responsibilities PRECLUDE the option of a vacation this summer. A.) made impossible in advance************ B.) specified in advance C.) were in harmony

  36. Algebra

    A meteorologist says that the probability of snow today is 45%. What is the probability that it will not snow? • 2/11 • 9/10 • 11/20 • 9/11

  37. Science help!!!!

    What does selectively permeable mean???? A. selectively permeable means not letting anything in or out. B. selectively permeable means letting everything in and out. C. selectively permeable means only letting things in but never letting anything out. D.

  38. Chemistry

    A sample of H2 is collected over water such that the combined hydrogen–water vapor sample is held at a pressure of 1 standard atmosphere. What is the partial pressure of the H2 if that of the water vapor is 2.5 kPa? A. 103.8 kPa B. 98.8 kPa C. 2.5 kPa D.

  39. Algebra please check my answers

    1) The linear function f(x) contains the points (-10, -29) and (-2, 83). If g(x) = 25x - 50, which statement is true? A. The functions f(x) and g(x) both have positive slopes.

  40. math

    Find the product 1. (2x)(10x) (1 point) 20x 12x 20x^2 5x 2. –3m(m + 8) (1 point) –3m2 + 24 –3m2 – 24m –24m^2 –4m + 5 3. 4d(2d – 9) (1 point) 8d – 36d –d –28d^2 8d^2 – 36d 4. (3x + 4)(x – 2) (1 point) 3x^2 – 2x – 8 x – 8 3x –

  41. Chemistry

    Ammonia is produced when Nitrogen gas reacts with Hydrogen gas, as shown by the equation below: N2 + 3H2 --> 2NH3 If the percentage yield is 90%, what would be your experimental yield of NH3 if 145.8g of N2 react? 2) 2Mg + O2 --> 2MgO A) If 50g of Mg

  42. Chemistry

    Ammonia is produced when Nitrogen gas reacts with Hydrogen gas, as shown by the equation below: N2 + 3H2 --> 2NH3 If the percentage yield is 90%, what would be your experimental yield of NH3 if 145.8g of N2 react? 2) 2Mg + O2 --> 2MgO A) If 50g of Mg

  43. math 6 rule pattern

    The same rule is used on each of these number column A to get the numbers in Column B. COlumn A B -3 -5 0 1 3 3 6 13 Which could be the rule? Multiply by 2, then add 1 add 1 Subtract 2 Multiply by 3, then add 4 I picked that last one, But I know I am

  44. math (last question #5) @Damon

    5. (2y – 1)(4y – 3) (1 point) –2y + 3 8y^2 – 10y – 3 8y^2 – 10y + 3 8y^2 – 2y + 3 i did the rest (#1 and #3) but im stuck on #5, can u help Damon? thanx

  45. algebra

    A video rental company offers a plan that includes a membership fee of $6 and charges $2 for every DVD borrowed. They also offer a second plan, that costs $48 per month for unlimited DVD rentals. If a customer borrows enough DVDs in a month, the two plans

  46. Chemistry

    Suppose that coal of density 1.5g/cm3 is pure carbon. The combustion of carbon is described by the equation C+O2---> CO2 ∆H◦ = −394 kJ What is the value of q (heat) a ump of coal the size of 7.5cm*7cm*6.5cm is burned? answer in kJ what mass of water

  47. Physcis

    A bird lands on a bare copper wire carrying a current of 27 A. The wire is 8 gauge, which means that its cross-sectional area is 0.13 cm2. (a) Find the difference in potential between the bird's feet, assuming they are separated by a distance of 7.2 cm.

  48. Algebra

    A website requires a four-digit numerical password in which the digits cannot repeat. How many possible passwords are there? • 24 • 5,040 • 151,200 • 3,628,800

  49. Science--check my answers.

    1. Which of the following effects would you expect if red blood cells were shaped like neurons? They would not be able to move as easily through capillaries. **** They would more easily carry out gas exchange in the alveoli. They would not need to be

  50. math

    In which quadrant does the terminal side of the angle with measure -245 degree lie? Quadrant I Quadrant IV Quadrant III Quadrant II None

  51. English

    Identify the degree of comparison for the bolded word. This new magazine about computers is very COLORFUL. A.) Positive B.) Comparative C.) superlative D.) none of the above The article on Web design is LONGER than the one on games. A.) Positive B.)

  52. math

    A train leaves LAX traveling 65 MPH and another train leaves NY traveling at 35 MPH…at what destination will they collide

  53. Algbera

    which angle is coterminal with an angle measuring 130 degrees? 230 130 -490 490 none of these

  54. Civics

    A major US trade partner has gone to war with its neighbor. It's leader asked the United States for help. Which of the following statements is true about how the president will react? A. He will make a decision based on only his own feelings about the war.

  55. English

    Choose the best answer. Which sentence would make the best opening for a speech arguing for more nutritious school lunches? A.) Many students dislike the current lunch menus, and I feel they should be changed.******************************** B.) Evidence

  56. Science/Health

    2. Which of the following explains why the heart is organized so that it pumps blood to two different locations? A. to supply blood to two different sides of the body B. to allow a way for the blood to pick up new blood cells C. to move oxygen-poor blood

  57. Language Arts /The Giver

    1. What is the jonas apprehensive about at the beginning of the novel? A. a plane flying over the community B. a dream that he had recently C. the upcoming ceremony and his assingment ***** 2. In Jonas's community, members are released from the community

  58. math

    What does the word rational coordinates Mean? What are they used for and what is a real world problem that can help me understand it?

  59. Chemistry

    How many grams of iron metal do you expect to be produced when 245 grams of an 80.5 percent by mass iron (II) nitrate solution reacts with excess aluminum metal? Show all of the work needed to solve this problem. 2 Al (s) + 3 Fe(NO3)2 (aq) yields 3 Fe (s)

  60. Math

    A chessboard has 8 rows and 8 columns. A rook and a bishop are put randomly and with equal probability among all pairs of squares of the board. a. What is the probability that the two pieces are put on the squares (1,1) and (1,2)? b. What is the

  61. Algebra

    The table below represents the function f(x). (-6, 12),(-5,-8),(-4,-4), (-3,0),(-2,4),(-1,8),(0,12). If g(x) is a linear function that has a slope of -3 and a y-intercept of -9, which statement is true? A) The x-intercept of f(x) is less than the

  62. Calculus

    A fragment of bone is discovered to contain 20% of the usual carbon-14 concentration. Estimate the age of the bone to the nearest hundred years, given that Carbon-1 is radioactive with half-life of 5730 years and the rate of decay is given by the following

  63. English

    The question was "What lesson or meaning do you think this story held for the British audience of the Victorian Era?" This is for the story The Mark of the Beast by Rudyard Kipling. I was thinking that the answer was that the lesson was that just because

  64. Science

    2. Adding a _______________ to an electric circuit would increase the magnetic field around a wire. a.) insulator b.) solenoid c.) resistor d.) conductor My Answer: conductor

  65. Maths

    find the equation of the perpendicular bisector of the line joining P(2, -4) to Q(-5,1) A. 8y-14x 13=0 B. 8y-14x-13=0 C. 8y 14x-13=0 D. 8y 14x 13=0 Please I need someone to help me with this, with an explanatory workings.

  66. Math 6 meters help

    A fence encloses a rectangular field. The field is 4 meters longer that it is wide. The total length of the fence is 144 meters. What is the area in square meters of the enclosed field? Choices 1,192 1296 1292 1440 I have tried dividing but getting know

  67. Science

    1. Name the components of the respiratory system in the order incoming air would encounter them during breathing. A. trachea, pharynx, larynx, alveoli, bronchi B. bronchi, larynx, alveoli, trachea, pharynx C. larynx, trachea, bronchi, pharynx, alveoli D.

  68. Science 1 question

    5. Which of the following would be true during the inhalation phase of breathing? A. The lungs are inflated, oxygen concentration is high, and carbon dioxide concentration is low in the alveoli. B. The lungs are deflated, oxygen concentration is high, and

  69. Algebra

    Suppose you roll a red number cube and a yellow number cube. What is the probability of rolling any matching pair of numbers? (Hint: Add the probability of each of the six matches.)

  70. maths

    3sinpi/6 secpi/3-4sin5pi/6cotpi/4=1

  71. Math 6 gemoetery

    A business owner wants to have a rectangular parking lot resurfaced. The lot is 93 feet long by 58 feet wide. Basesd on a cost of $2.47 per square foot, the owner incorrectly estimated that it would cost $12,000 to have the lot resurfaced. Which could be

  72. chemistry

    i need to find the enthalpy for COF2 F2 (g) + CO (g) --> COF2 (g) i found -507 but i am not sure if it is correct

  73. Math

    identify the center and radius of the circle with the equation (x+5)^2+(y-2)^2=9 A. this equation represents a circle with center (5,-2) and a radius of 3 units B. This equation represents a circle with center (-5,2) and a radius of 3 units C. this

  74. math 6 probability

    Rick plays football. He makes 75% of his passes. He will be attempting two passes. Rick makes the first one. What is the probability that Rick makes the second pass? 25% 75% 100% 50% I think it's %50 ?

  75. economics

    What is the SA government proving providing and to whom?

  76. Spanish

    Spanish Help Me Plz!!^__^ _________ 1. La Marcha _________ 2. La Cruz de Guía _________ 3. La Bulla _________ 4. Los Nazarenos _________ 5. El Paso del Cristo _________ 6. Los Penitentes _________ 7. El Paso Palio a. crowds of people b. the members of the

  77. science

    ZnS(aq) + 2HCl(aq) --> ZnCl2(aq) + 2H2S(g) what happens in this reaction means what changes& colour happens????

  78. chemistry

    Calculate a value for the solubility of (NH4)2C2O4H2O in g/100 cm3 at 298 K

  79. Economics

    What are the costs and consequences of providing the subsidies and welfare?

  80. Business Math

    248.24 is 50% of what number?

  81. English

    Dear Writeacher, thank you for the answer. Will you help me with two more questions? 1) Do you think it's possible to say "according to the opinion of many analysts" (I mean 'according' + 'opinion', or just "according to many experts")? 2) Do you think

  82. Geometry

    Using a 30-60-90 triangle, if b = 12, find c? I can't seem to get any formulas to work for this. any help would be wonderful.

  83. Math

    1/a+1/b+1/c=1/2 a≧b≧c Please help me The math question

  84. Algebra

    write the equation of the circle passes through the point (√5,0) and whose center is the origin

  85. Math

    determine the midpoint of the segment whose endpoints are a(7 3 -4) and b(-3 1 0)

  86. History

    Explain why some british politicians thought it would be good for Great Britain to keep the colonies?

  87. math

    1 identify the coordinates of the vertex and the equation of the axis of summetry of the parabola x=2 (y-1)^2+3 A. The vertex of the parabola is (1,3), and the equation of the axis of symmetry B. the vertex of the parabola is (3,1) and the equation of the

  88. math 6 probaility

    max flipped a pair of coins 60 times. On 24 occasaions, heads appeared on both coins. How is this outcome different from the expected outcome? It occurred 9 more times than expected. It occurred 4 more times than expected. It occurred 6 fewer times than

  89. Maths (Integration)

    Integrate(1+x/x^3)dx Don't know how to go bout this, if the numerator was a whole number it would ve been easier for me, Pls help me out.

  90. u.s. history

    ways in which life changed on the home front during WWI.

  91. English

    1. Why don't you start first? 2. Why not start first? 3. How about starting first? 4. What do you think about/of starting first? 5. How do you feel about starting first? --------------- Are they all grammatical?

  92. physics

    At the top of a hill, a roller coaster has 67,500 J of kinetic energy and 290,000 J of potential energy. Gradually, the roller coaster comes to a stop due to friction. If the roller coaster has 30,000 J of potential energy when it stops, how much heat

  93. geometry

    there exists a circle with chords. the chords are congruent. their corresponding arc measurements are 80 degrees and 2x+10 solve for x

  94. u.s. history

    comparing the kinds of changes that took place in the United States during WWI with changes that took place in the U.S. following the attacks of September 11, 2001.

  95. English

    1. Do you sleep less than 5 hours a day? 2. I like you less than him. 3. I ate fish less than fruit. 4. I ordered fried chicken less than noodles. 5. I player soccer less than baseball. 6. I studied math less than English. 7. I helped Mother less than my

  96. MATH

    HOW DO YOU WRITE 21 MAY 2014 IN 5 LETTERS WITHOUT USING NUMBERS

  97. u.s. history

    Assignment: Students are organized into small groups. Students select the question(s) they would like to investigate on the influenza epidemic that began in 1918 using the following questions as a guide: i only need this one Where did it begin and how did

  98. Algera

    identify the vertices, the co-vertixes, and the foci of the ellipse x^2/4+y^2/9=1 A. the vertexes are (0,2) and (0,-2). The co-vertexes are (3,0) and (-3,0). The foci are ((0, 3√5) B. The vertex ices are (0,3) and 0.-3). The co-vertex are (2,0) and

  99. health

    What is bone strengthening?

  100. English

    What kinds of toppings can people choose for Brussels waffles? 1. People can choose chocolate, ice cream, and fruit. 2. They can choose chocolate, ice cream, and fruit. ------- Are both answers grammatical? Then, which one is a common answer.

  101. Jumba s.s.s.

    Which impact would hv xenophobia to community

  102. statistics

    predict the score in statistics for a student whose score in mathematics is 30

  103. Chemistry

    Hey guys so I was absent for my class and my teacher STILL wants me to figure out how to do limiting reactant and theoretical yield I tried Khan academy and it was no use. So basically the first question is : My data is : Mass of lead nitrate = 5.03g and

  104. Evaluate the expression.Algebra

    Evaluate the expression. (9/6) (6/4) (3/1) I think this are combination I try three different ways, now I am not sure how to do it.

  105. physics

    A person has a 2 resistance coils. By using them singly, in series or in parallel, he obtains 2 ohm, 4 ohm, 12 ohm, and 16 ohm. What is the new resistance?

  106. math

    If a plant has a linear growth rate and 1 day after planting is 2x+4 and day four is 4x+8 Wgat is the growth rate?

  107. Math

    A video rental company offers a plan that includes a membership fee of $6 and charges $2 for every DVD borrowed. They also offer a second plan, that costs $48 per month for unlimited DVD rentals. If a customer borrows enough DVDs in a month, the two plans

  108. math

    The scale on a map is 1cm :50 m.determine a distance of 4 cm in metres

  109. Help Mrs.Sue LA

    Courage to Speak “Any volunteers?” Ms. Chavez scanned the class. Ming slouched farther down in her seat. “Come on now, you’ll all have to interview someone sometime this year. No one wants to go first? Okay, I’ll just have to choose someone.” I

  110. physics

    A car with a mass of 2,000 kg has a kinetic energy of 900,000 J. How fast is it traveling?

  111. Math

    identify the vertex and the length of the transverse axis is 10 units, and the length of the conjugate axis of the hyperbola x^2/25-y^2/16=1

  112. Stats

    I am working on a review sheet and got everything except for this one. I am not sure whether to use z or t. The number of hours per week that high school juniors watch TV is normally distributed with a mean of 8 hours and a standard deviation of 2 hours.

  113. science

    Passive transport involves movement of substances. A. from areas of lower concentration to area of higher concentration B. from areas of higher concentration to areas of lower concentration C. from areas in which the concentration has reached a balance D.

  114. math

    A construction company is laying natural gas Piping: pipeline. Several sections of pipe have been laid in a pile at the construction site. There are 12 sections of pipe in the bottom row of the pile. Each row has one less pipe than the row below it. There

  115. Geography

    How did Southeast Asians react to contact with many different religions?

  116. math

    Rich is 1.5 meters tall and cast a 0.75 meter shadow. At the same time a nearby flagpole cast a 3 meter shadow. How tall is the flagpole?

  117. BIOLOGY please help

    The first phase of somatic cell division is (A) __________, when the cell’s chromosomes condense, and the nuclear envelope that holds the chromosomes starts to break up. During this time, structures called the (B) __________ form from centrioles, which

  118. math

    c=2πr c= 7.12 pi= 3.14 find value of r -rounded to 2 decimal points

  119. Physics

    2. How much energy would a body of mass 50kg need to provide for the following: a. Climbing a hill 500m high. b. Walking up steps 10m tall. c. Jumping 10cm up.

  120. math

    A line has a run of 5 feet and a rise of 13 feet. Determine the slope.

  121. Algerbra 2

    Billy buy a car for 16,400.his car depreciates in value 24% each year. What was the value after 2 years?

  122. Maths/Algebra/Calculas

    A square piece of paper 20cm by 20cm has equal sized squares cut from each corner, size x. What is the formula to work out the volume of this? Also what size squares cut at each corner would produce the largest volume open top box? Thanks for any help,

  123. Civics

    1. Who has the power and the United States to declare war? A. President. B. the senate. C. Secretary of state. D. Congress . 2. Which of the following issues relates most to domestic policy? A. Education. B. treaties. C. War. D. Military. 3. Which of the

  124. Physics

    A bird lands on a bare copper wire carrying a current of 27 A. The wire is 8 gauge, which means that its cross-sectional area is 0.13 cm2. (a) Find the difference in potential between the bird's feet, assuming they are separated by a distance of 7.2 cm.

  125. Precalculus

    Find the values of x and y. Matrices.. [-4 2 3 5 3 5 2 -3 1] TIMES [2 x 5] EQUALS [9 38 y] It is difficult for me to type the matrices in but.... The first matrix is 3x3 consisting of -4,2,3 in the first row.. 5,3,5 in the second row ......2,-3,1 in the

  126. Math 6 proportion

    21% reptiles, 11% are birds. There are a total of 1,500 animals in the zoo. Is this the correct proportion that I wrote to solve? 11/21 = r/1,500

  127. Algebra

    Need help, I think it is 2/25. Do you have an equation that I can figure it? You choose a marble at random from a bag containing eight brown marbles, six yellow marbles, and one purple marble. You replace the marble and then choose again. Find P(both

  128. english question

    i think its A. or C. Which among the following sentences is the most effective opening line (hook)? A.I hope that if you will read my paper, you will believe me when I tell you that John F. Kennedy was not assassinated as the result of a plot but by a

  129. science

    Write balanced chemical equations (using symbols) for the following reactions 1.hydrochloric acid reacts with magnesium to form magnesium chloride and hydrogen 2.Nitrogen monoxide burns in oxygen to form nitrogen dioxide

  130. math

    The 3rd term in an arithmetic sequence is 12, the 7th term is 24, a) How many common differences are there between a_3 and a_7? b) What is the common difference of the sequence? c) What is the first term in the sequence? a_1 d) What is the expression for

  131. Social Studies Help? Thanks!~ :3

    Name two geographic obstacles and one political obstacle that stood in the way of the construction of the Panama Canal. How did engineers and politicians overcome these obstacles?

  132. Socials

    Summarize the impact each of the 3 components in the national policy had on political considerations. Protective tariffs Increased immigration CPR (Canadian pacific railway) I already did half of this question because it asked for the impact these 3 had on

  133. ECONOMICS

    WHAT IS THE SOUTH AFRICAN GOVERNMENT PROVIDING AND TO WHO?

  134. Algebra

    You take a three question true-or-false quiz. You guess on all the questions. What is the probability that you will get a perfect score?

  135. algebra

    Use a calculator to evaluate an ordinary annuity formula A = m 1 + r n nt − 1 r n for m, r, and t (respectively). Assume monthly payments. (Round your answer to the nearest cent.) $150; 5%; 40 yr A = $

  136. Math

    six people can sit in one table that is rectangular when two tables are placed together ten people can be seated how many people can be seated with three tables?

  137. Algebra

    What are the solutions of the equation 18x^2 - 25x - 3 = 0? A. -1/9,3/2 B. 9, 3/2 C. -9,2/3 D. 1/9, -3/2

  138. English

    identify the sentence in which the bolded verb does not agree with its subject. A.) Everyone on the team WORKS together well. B.) Both of them ARE LOOKING forward to the field trip. C.) Neither of the boys IS EXCITED about playing

  139. Algebra/Permutation

    How do I solve this problem. I try just 1 than just 4 nether were right, than I try 4/4r the Problem is 4Pr Thank you

  140. help please on this

    Making a vaccine for HIV is difficult because the virus has a rapid rate of (A)__________. This is because it is a(n) (B)________ - its genetic material is RNA instead of DNA.

  141. Calculus

    1/X by first principles

  142. Math 6 properties label

    43 + (57+69) (43+57)+69 Are these associative,Commutative, Identity, Inverse property of addition? I feel it is Associative Property of addition.

  143. math

    there is a monthly fee of $35 at your fitness center. You have spent $700 in fees at the fitness center since you have joined.Write and solve an equation to determine how many months you were a member

  144. English

    What is the subject and the verb of the sentence : A police officer stepped into the street and stopped cars .

  145. chemistry

    Calculate the current in ampheres required to produce 15.0g in 2 hrs.

  146. u.s. history

    ways in which life changed on the home front during WWI. can i put that it caused everyone to ration. most ppl would plant victory garden and buy good in stores to send to the troops. everyone had stamp book which they could buy things in the store. kids

  147. algebra

    i'm thinking of two numbers, x and y. The sum of 4x and 1 is y. The sum of y and twice x is 13. Find x and y.

  148. Math

    The number p is the product of three different positive prime numbers greater than 2.If the sum of these three prime number is also prime, what is the smallest possible value for p? Won't the 3 number be 3-5-11? Thanks

  149. math

    you have $5 for lunch. You bought a turkey sandwich for $2.25.Write and solve an inequality to show much more can spend.

  150. Economics help please!

    An automobile company is building a new factory in your town. What may be a positive externality of this event? A. Noise produced by the workers and factory machines. B. Better schools from increase in property tax revenue C. Reduction of contaminants in

  151. Algebra 2

    Given the point A(2,-1) on the terminal side of angle 0, what is the value of the cosecant of angle 0?

  152. Math Help!

    1. Find the product. (2x)(10x) 20x 12x 20x^2 5x 2. -3m(m + 8) -3m^2 + 24 -3m^2 + 24m -24m^2 -4m + 5 3. 4d(2d - 9) 8d - 36d -d -28d^2 8d^2 - 36d

  153. u.s. history

    changes that occurred during WWI and after 9/11?

  154. math

    explain how to graph the inequality 13>=x

  155. Calculus

    find the co-ordinates y=x(2-x) where the gradient is 2

  156. History of KKK

    the history of the KKK and their activities in the postwar South a. What conditions led to the formation of this group? b. What were their tactics? c. What was the result of the activities?

  157. Algebra 2

    what is the exact value of cos 5pi/3 radians

  158. Algebra

    A bag holds 20 yellow mints and 80 other green or pink mints. You choose a mint at random, eat it, and choose another. Find the number of pink mints if P(yellow then pink) = P(green then yellow). What is the least number of pink mints if P(yellow then

  159. math

    A music concert was attended by 450 people. Adult tickets sold for $70 and children’s tickets for $40. If total sales were $27,750, how much of each ticket was sold?

  160. Economics

    People are more likely to clean up waste in their homes than at a community park because.. A. people expect the community park to be dirty. B. hiring a person to clean the home is expensive. C. they own and therefore feel responsible for their home. D.

  161. Economics help please!

    A decision making model is more beneficial than simple comparing costs and benefits because A. the decision making model encourages you to consider multiple options. B. a costs and benefits analysis encourages you to consider multiple options. C. the costs

  162. math/financial planning

    bill is in a 30% marginal tax bracket and lives in los angeles and has invested $20,000 in corporate bonds which earns average annual income of 7.5% what will be bills tax return for the current year?

  163. math 6 algebra

    Mikayla wrote the equation below to calculate y, the total amount of money in dollars she will have saved after she has been saving for x weeks. y = 6x + 80 How much more money will Mikayla have saved after 8 weeks compared to 5 weeks? $8 $18 $98 $128 How

  164. Science(chemistry)

    Give one word/term for the following description in any given chemical compound,the elements always combine in the same proportion with each other

  165. language arts check

    The word simulation originally refers to the act of imitating. What meaning of the word is used in this excerpt from "What Makes Teens Tick?" "In an experiment using a driving-simulation game, he studied teens and adults as they decided whether to run a

  166. English (Checking please)

    According to the author, it is difficult for people to comprehend what when on at Auschwitz because the events are so terrible that readers have never experienced anything similar.

  167. math

    ted has $20,000 invested in mutual bonds from the city of L A.these bonds pay an average return of 5.4% what is the after tax return for the current year on this municipal bond?

  168. Math 6 scale math

    A model of a rail road station has a scale of 1 inch equals 3.5 feet. The dimensions of the model railroad are 34 inches by 18 inches. What are the dimensions of the actual railroad station? 3.5 feet by 18 feet 34 feet by 63 feet 102 feet by 63 feet 119

  169. Physics

    what is the role of a commutator in a DC motor?

  170. Physics

    How do observations of the photoelectric effect conflict with the predictions of classical physics?

  171. chemistry

    The volume of a gas is 150 mL at 240.0 kPa pressure. What will the pressure be when the volume is reduced to 100.0 kPa, assuming the temperature remains constant?

  172. Algebra

    You spin a spinner that has eight equal-sized sections numbered one to eight. Which event is least likely to occur? • The number is even. • The number is less than three. • The number is greater than three. • The number is a multiple of five.

  173. Calculus

    a meteorite slams into the earths crust and penetrates d=(1200t-36000t^2)m in t seconds after impact. What is the maximum depth of penetration?

  174. Science

    When a cell is infected with a virus, what is produced for future protection? i thought it was good bacteria but i don't think a cell can do that. So confused.

  175. Economics

    A decision making model is more beneficial than simple comparing costs and benefits because A. the decision making model encourages you to consider multiple options. B. a costs and benefits analysis encourages you to consider multiple options. C. the costs

  176. Chemistry

    Stoichiometry; Find the percent yield of solid calcium carbonate made when 5.0 mL of 1.0 M Sodium Carbonate reacts with 0.40g Calcium Chloride Balanced Equation; Na2(CO3)+CaCl2-->2NaCl+CaCo3 could you please help me step by step to find the theoretical

  177. Science -Check Answers-

    1. A kitchen ceiling light has five light bulbs on it. When one of the lights goes out, the other four bulbs stay lit. This is an example of a series circuit. True OR False My Answer: True 2. Adding a _______________ to an electric circuit would increase

  178. math test

    A new cruise ship line has just launched 3 new ships: the Pacific, the Caribbean, and the Mediterranean. The Caribbean has 32 more rooms then the Pacific. The Mediterranean has 38 fewer rooms than FOUR times the number of rooms on the Pacific. Find the

  179. language arts check

    4. The Latin word alius means "other." Which of the following words contains this root? alien alight alike** alignment

  180. trianom

    the min. of a clock is 9 inches long and move from 6 to 8 o'clock. hor far does the tip of the min. hand move?

  181. Math 6. Correct?

    Amy is making scale drawings of different things in her neighborhood. One house she drew is 30 feet wide. Her scale drawing of the house is 5 inches wide. Which of the following uses the same scale Amy used to draw this house? Is this right my answer

  182. Science

    To lift a load to the roof, you apply 21 N of force to a pulley. The pulley applies 21 N of force to the load. What is the mechanical advantage of the pulley? A.0 B.1 C.40 D.21

  183. Movie comprehension

    I missed class and did not watch " Never Cry Wolf". So .... What did the wolf do to Tyler's suitcase? How did Tyler respond to the wolf's actions and what was the meaning of his responses?

  184. chemistry

    How many grams of magnesium metal will react completely with 5.2 liters of 4.0 M HCl? Show all of the work needed to solve this problem. Mg (s) + 2 HCl (aq) yields MgCl2 (aq) + H2 (g)

  185. fifth grade math

    susan picked a watermelon that weighed 8/15 lb. larry a watermelon that weigh 1/4 as much as Susans. how muchdid larrys weigh

  186. HIS204

    Question 1.1. The Depression reached its most devastating point in the months between FDR’s victory and when he entered the White House. However, he proclaimed that there was only one thing that the American people needed to be fearful of. Which of the

  187. Calculus

    x(x^2-1)^3 using change of variable

  188. Calculus

    xe^x using integration by parts

  189. Calculus

    2x -------- (x-2)(x+2) using partial fractions That's supposed to be a division sign of some sort

  190. chem

    a hydrocarbon has an empirical formula CH and a vapour density of 39. Determine its molecular formula. solution.................................................... CH=12+1 n=13 13n=39 =3

  191. Calculus

    Find the area of the region enclosed by the parabolas y=x^2 and y+2x-x^2

  192. Algebra

    What is the probability that a number picked from the set {–4, –3, –2, –1, 0, 1, 2, 3, 4, 5} will be a solution of 2x + 5 > 1? • 20% • 30% • 70% • 80%

  193. Calculus

    Find the volume of the solid generated by rotating about the y axis the area in the first quadrant bounded by the following curve and lines. y=x^2, x=0, y=2.

  194. Biology

    During exercise, (B) __________ muscles in the walls of the veins contract and cause the vein walls to stiffen so more blood flows to the heart and lungs.

  195. Physics Please help

    A thin, horizontal 20cm×20cm copper plate is charged with 1.7×10^10 electrons. Consider the electrons are uniformly distributed on the surface. A. What is the strength of the electric field 0.1 mm above the center of the top surface of the plate? E=____

  196. Physics Please help2

    Two small insulating spheres with radius 7.00×10^−2m are separated by a large center-to-center distance of 0.565m . One sphere is negatively charged, with net charge -2.05μC , and the other sphere is positively charged, with net charge 4.10μC . The

  197. Physics Please help4

    Two 1.50cm -diameter disks spaced 1.80mm apart form a parallel-plate capacitor. The electric field between the disks is 5.10×10^5 V/m I got the voltage as =918 but B. How much charge is on each disk? _________C? and C. An electron is launched from the

  198. algebra

    Tarot cards are used for telling fortunes, and in a reading, the arrangement of the cards is as important as the cards themselves. How many different readings are possible if four cards are selected from a set of seven Tarot cards? Thank you

  199. Statistics

    A confidence interval for a population mean has a margin of error of 3.1. a)Determine the length of the confidence interval. b)If the sample mean is 56.7, obtain the confidence interval.

  200. Science(chemistry)

    Give one word/term for the following descriptions during this type of reaction,the appearance,colour or shape of a substance is changed

  201. maths

    prove that sin sqared pie/6+ cos sqared pie/3-tansqare pie/4=1/2 in trigonometry

  202. Writing

    13. Which of the following is a complex sentence? A. I would like to visit the Kinshasa, but I understand the city is unsafe for foreigners. B. As Jake was reading the letter from June yet again, the flight attendant coughed gently to get his attention. C.

  203. geometry

    If Dave is 6 feet tall and casts a shadow of 15 feet, what is the height of a tree that casts a shadow of 81 feet? Draw a diagram and solve for the height of the tree.

  204. Algebra

    13a+9b-2a-4b

  205. maths

    2sinsqaredpi/6+cosecsqared7pi/6cossqaredpi/3=3/2

  206. trignometry

    2 sinsqarepi/6=cosecsqare7pi/6 cossqare pie/3=3/2

  207. Math

    What is a unit rate?

  208. MATH

    There are 8 boys, 12middle schoolers and 8 girls. what is the ratio of girls to boys?16/12=4:3 divide both sides by 4

  209. maths

    2sinsqaredpi/6+cosecsqared7pi/6cossqaredpi/3=3/2 in trignometry

  210. Math 8th gr.

    27 - (-9) (-2) ÷ 3 * (-4) - 0 - 33 - (-39)

  211. math

    -15 - (3-7) + 6 * (-2) + (-8) - 9

  212. History

    in which ways did the colonies of British north america benefit from the intercolonial railways

  213. math 8th grade

    -15 - (3-7) + 6 * (-2) + (-8) - 9

  214. Math 8th Grade!!!!

    27 - (-9) (-2) ÷ 3 * (-4) - 0 - 33 - (-39)

  215. math 6 probability

    Eric has a spinner that is divided into different colored sections that are the same size and shape. On any spin the theoretical probability of the arrow landing on the red section is 1/5. When Eric spun the arrow x number of times, the arrow landed on the

  216. science

    i need to find the enthalpy for COF2 F2 (g) + CO (g) --> COF2 (g) i found -507 but i am not sure if it is correct

  217. English

    Hello. I will be very grateful if you check the sentences: 1)"Do you think students are not allowed to use dictionaries while writing tests?" 2)"Do you think using dictionaries is not allowed while writing tests?" Do they sound natural and standard

  218. Maths

    Question: total of 40 students in class, boys number is double of the girls number. How many boys & girls in the class? Working as follow: a = boy b = girl 2a + b = 40 2a + 2a = 40 4a =40 a =10 b=2a b = 2x 10 b = 20 So a=10, b= 20. Total only 30, not 40 .

  219. Math,english,lo,ancilury,art&culture,setswana

    Simplify the following ratios.6:72

  220. science help !!

    1. Why is California’s high-speed rail such a groundbreaking effort? 2. Why will it take so long to complete the high-speed rail route?

  221. math

    A section of a hiking trail begins at the coordinates (-7, 5) and follows a straight path that ends at the coordinates (3, 9). What is the rate of change of the hiking trail?

  222. Math

    identify the center and radius of the circle with the equation (x+5)^2+(y-2)^2=9 A. this equation represents a circle with center (5,-2) and a radius of 3 units B. This equation represents a circle with center (-5,2) and a radius of 3 units C. this

  223. Romeo and Juliet

    Shakespeare departs from Aristotle's idea about the hero's recognition. In Romeo & Juliet, it is not Romeo who experiences recognition, but other characters in the play. Who are these characters, and when does the recognition occur?