Questions Asked on
April 8, 2013

  1. Math probability

    Assume that 60% of community college students are female. 1) if we pick 100 students at random justify why we can or cannot model this using a normal model. 2) find the probability that between 50 and 70 of the 100 students selected are female. 3) fidn Q1

    asked by Katy
  2. physics

    five joules of work are needed to shift .5 C of charge from one place to another. the potential differences between the places is

    asked by Susan
  3. algebra

    i need help solving this problem -58x-26=8x-230.6 please help need to see how u get the answer

    asked by teanna
  4. physics

    how much energy is stored in a 9 volt battery rated at 10 a hour

    asked by Susan
  5. math - please help me

    65 chemical engineering students are from urban/suburban backgrounds. (Success is defined as a C or better in the course.) 52 of the 65 students succeeded. Another 55 students were from rural backgrounds; 30 of these students succeeded. A Is there good

    asked by Sejul
  6. physics

    sound can not travel through

    asked by Susan
  7. Algebra

    The value in dollars, V, of a certain stock can be modeled by the equation V=-16+88t+101, where t represents the time in months.When did the stock become worthless?

    asked by Mark
  8. accounting 205

    compute the following items for lone pine company for 20x2, rounding all calculations to two decimal places when necessary

    asked by tracy
  9. Algebra

    The value, V< of Juan's investment portfolio can be modeled by the equation V=16t^2-256t+16,000. When will Juan's investment portfolio be worth $16.576.00?

    asked by Mark
  10. science

    1. _____ is the chemical reaction in cells that needs oxygen to release energy and produces carbon dioxide and water as waste. (1 point) Breathing Exhaling Inhaling Respiration 2. Lungs are masses of _____, grapelike clusters of tiny sacs that are

    asked by Anonymous
  11. math

    I need an expression written for the following logs using "sum, difference, or multiple of logarithms." a) log[base(2)] ((x^2) - 9)/(x^3))^3 b) log[base(a)]5a^4 Hopefully they are clearly written. thanks. -roberto

    asked by Roberto
  12. mathematics

    Need help with these: Write the expression as a logarithm of a single quality. a) 3log[base5](a) + 4log[base5](b) - 2log[base5](c) b) 3log(2)-(1/3)log((x)^(2) - 1) I appreciate help.

    asked by Tom
  13. math

    Ok.. "The strongest recorded earthquake in the world took place in Child on May 22, 1960. It had a magnitude of 9.5 on the Richter scale. The strongest quake actually recorded in Canada was magnitude 8.1 on August 22, 1949 and occurred off the Queen

    asked by Josh
  14. Statistics

    A study of two groups of children since early childhood: One group of 62 attended preschool. A control group of 61 children from the same area and similar backgrounds did not attend preschool. Over 10 year period as adults, 38 of the preschool sample and

    asked by Jose
  15. Math-Statistics

    Assume that 60% of community college students are female. 1) If we pick 10 students at random justify why we can or cannot model this using a normal model. 2) Find the probability that 8 of the 10 students selected are female. 3) Find the probability that

    asked by Jose
  16. math

    Math systems 3x-2y-z=-20 x-y=10

    asked by chris
  17. Chemistry

    1. Calculate the pH of a buffer solution that contains 0.32 M benzoic acid (C6H5CO2H) and 0.17 M sodium benzoate (C6H5COONa). [Ka = 6.5 × 10-5 for benzoic acid] Round your answer to two places past the decimal. 2. A solution is prepared by mixing 470 mL

    asked by Erin
  18. Calculus

    what is the second derivative of (x^3-6x)^11 that is fully simplex

    asked by Molly
  19. calculus

    air is being pumped into a spherical balloon at a rate of 8 cm^3/min. Find the rate at which the radius of the balloon is increasing when the balloon's radius is 5 cm.

    asked by marisol
  20. calculus

    a spherical balloon's radius was measured to be 30 cm with a maximum possible error of 0.2 cm. a) use differentials to estimate the maximum error in the calculated volume. b) what is the relative error?

    asked by marisol
  21. calculus

    if a ball is thrown vertically upward with an initial velocity of 48 ft/s, then its height, s, after t seconds is given by s(t)= 48t-16t^2. a) what is the velocity of the ball after 1 second? b) when does the ball hit the ground? c) with what velocity does

    asked by moises
  22. Big MATH Help needed

    An object at rest begins moving horizontally on the x-axis, starting at position x(t) = 0 feet at time t = 0 seconds.Suppose, after exactly 2 seconds we measure the position of the object to be 3 feet to the right of the origin AND measure the object to be

    asked by Rosie
  23. Chemistry

    1. Calculate the pH of a buffer solution that contains 0.32 M benzoic acid (C6H5CO2H) and 0.17 M sodium benzoate (C6H5COONa). [Ka = 6.5 × 10-5 for benzoic acid] Round your answer to two places past the decimal. 2. A solution is prepared by mixing 470 mL

    asked by Erin
  24. algebra

    Could you show me how to do these math systems and show your work so i understand how to do them. 1) 3x+2y+4z=19 2x-y+z=3 6x+7y-z=17 2) 5x+8y+6z=14 2x+5y+z=12 -3x+6y-12z=20 3) x^2+2xy-2y^2=-11 x^2+xy-2y^2=-9

    asked by hal
  25. English

    While you're working in a sales office, the office manager says that the sales staff should try to use an empathetic tone when speaking with customers. In the word empathetic, the root means a.to give. b.to feel. c. to come d.to force.

    asked by Bianca
  26. college Mathematics

    Can someone please help me with this I am not getting the same answers as the examples in the book. U={1,2,3,4,5,6,7,8} A={1,2,3,4,7,8} B={1,2,4,5} Determine (A'UB')n(AUB)'

    asked by Carol
  27. Life orientation

    Identify and describe 3 enviromnmental health hazards that cause ill health, accidents, crisis, and disasters

    asked by Portia
  28. Trig

    Find the exact values of sin 2 theta, cos 2 theta and tan 2thea using the double angle formula sin theta = 3/4 , pi/2 < theta < pi

    asked by Jiskhaa
  29. Health

    In 10-15 line critically discuss 5 ways in which the human or environmental factor problem impacts on the community. Provide relevant source to support your claims.

    asked by Hulisani
  30. Chemistry

    given that: delta H [Cl(g)]=121.3 kJ*mol^(-1) delta H [C(g)]= 716.7 kJ*mol^(-1) delta H [CCl(subscript 4)(g)] =-95.7kJ*mol^(-1) calculate the average molar bond enthalpy of the carbon-chlorine bond in a CCl(subscript 4) molecule.

    asked by anonymous
  31. HELP!! Chemistry

    Draw a Lewis structure for SO(subscript 2) in which all atoms obey the octet rule. Show formal charges. Draw a Lewis structure for SO(subscript 2) in which all the atoms have a formal charge of zero. Explicitly showing zero charges is optional.

    asked by anonymous
  32. life orientation

    Critically discuss ten ways in which the environmental health hazards can impact on one's health

    asked by prudence
  33. life orientation

    three ways in which enviromental health hazard can contribute to ones ill health

    asked by frans
  34. Physics

    two blocks are connected by a light rope over a pulley fixed at the edge of a table such that bloc A, 16kg is a the table top and block B, 8kg is hanging by the edge. block A is acted upon by a mass of 200N acting towards the center of table surface. the

    asked by ashton
  35. physics

    a motor cycle wheel has a diameter of 75cm.During a contest journey,the wheel makes 3000 complete revolutions.how many metres does d motorcycle travel.

    asked by Anonymous
  36. math

    a banquet hall area is in d shape of a rectangle 30m by 20m.part of d area is a concrete square 15m by 15m,the rest is covered with carpet.calculate the area of the carpet.

    asked by gabriella
  37. life orientation

    in 10-15 lines critically discuss 5 ways in which the human or environmental problem impacts of pollution on the community

    asked by patric
  38. business

    define foreign trade

    asked by gabriella
  39. art

    what are technical names

    asked by gabriella
  40. french

    quelle heure est il?what is the time? 6:35,12:15,22:50,16:30,23:55 PLS HEEEEEEEEEEEEEEEEEELP

    asked by gabriella
  41. physical

    STATE 4 facts and fallacies abt the effect of sports participation on women reproduction

    asked by gabriella
  42. government

    what does national unity preach. mention 5 institutions that promote national unity.

    asked by gabriella
  43. Economics

    Use the concepts of marginal cost and marginal revenue to derive an optimal capital budget for Company X, which has identified 7 possible investment projects and determined its cost of capital as shown below. Table A: Alternative Projects, Required

    asked by Damian
  44. civi edu.

    define constitution and explain federal constitution,unitary constitution,confederal constitution

    asked by gabriella
  45. Chem

    how do you find the molarity of NaOH if 23.64ml of its solution is needed to neutralize .5632g of KHC8H4O4?

    asked by Mary
  46. life orientation

    name two institution organization that are invoved in supporting redress to these disasder in xenophobia

    asked by Anonymous
  47. math 12 grade

    find two positive number X and Y such that their sum is 35 and the product X2 Y5 is maximum?

    asked by ramesh
  48. Life orientantion

    Describe 5 factors of Hiv

    asked by Alice
  49. life orientation

    what are 10 ways in which environmental health hazards impact negatively in one's life

    asked by theo
  50. Creative writing

    I have to write a fractured fairy tale, and I have 2 questions. 1) is Alice in Wonderland a fairy tale? And 2) If I wrote something about Alice who falls asleep in wonderland and is killed and forced to be there forever, does that count as a fractured

    asked by Millie
  51. math

    the length of a rectangle hallway is 3 times its breadth if the perimeter of the hallway is 48 m find its length and breadth

    asked by mahendra
  52. Probability

    A school is running a raffle for two prizes. 59 tickets were sold for the raffle, numbered 1,…,59. All the tickets are put into a hat and a teacher picks out two tickets which have numbers i and j from the hat. What is the expected value of |i−j|?

    asked by stranger
  53. Geometry

    Convex quadrilateral ABCD has sides AB=BC=21, CD=15 and AD=9. Given additionally that ∠ABC=60∘, what is the length of BD?

    asked by stranger
  54. PHI103

    If I move to Texas, I will need air conditioning. I don't need air conditioning. So I didn't move to Texas" is an argument form known as

    asked by Krystal
  55. Middelsworth

    1. You flip a coin 30 times and get heads 11 times, so the chance of getting heads is . Is this an example of theoretical or experimental probability? (1 point)theoretical experimental 2. You have made 3 out of 10 of your last free throws. How many free

    asked by Chico
  56. maths

    Given the identity x^4-2x^3+ax^2-2=x(x-1)(x+1)Q(x)+4x^2+bx+c , where Q(x)is a polynomial, (i)state the degree of Q(x) (ii)find the values of a,b and c ,and hence state the remainder when x^4-2x^3+ax^2-2 is divided by x^3-x .

    asked by :)
  57. math

    If 4x^3-6x^2+1=(x-2)Q(x)+ax-3 for all values of x ,where Q(x) is a polynomial in x ,find (i)the value of constant a (ii)Q(x)

    asked by :)
  58. trig

    if sin 41'=m. write m in terms of cos 41'

    asked by thapelo
  59. math

    (8x^4 + 4x^2 + x) - (x + 10)(2ax^2 + 1) The expression is simplified to 8x^4 - 6x^3 - 56x^2 - 10. What is the value of "a" ?

    asked by Boobear
  60. Physics

    Calculate the work required to be done to stop a car of 1500kg moving with a velocity of 60km/hr?

    asked by Abhishek
  61. Chemistry

    Calculate the pH of a mixture containing 50.0 mL (0.50M) H2SO4 and 50.0 ml (0.50M) NaOH. I have no idea where to start!I need a walk through if possible! I've tried everything and I get the wrong answer every time!

    asked by Moots
  62. math

    Maribel's city imposes a tax that is 40% of the state tax she pays. Her taxable income is $198.50 per week. Her state imposes tax at a rate of 5%. How much state and local tax is withheld from her weekly pay?

    asked by kk
  63. Physics

    Recently there has been technological advances that allow for 3-D imaging up to kilometers away from an object. This can be done by using laser light that bounces off an object. By measuring the time it takes the laser light to get to the object and back,

    asked by Bob
  64. Physics

    You wish to swim across a small river to your friend on the other side. The river is 30 m wide and you begin to swim straight across it at a speed of 1 m/s. The current in the river is 0.5 m/s and so the river carries you downriver as you swim. How far

    asked by Bob
  65. Physics

    The world record for revolutions per minute for an ice skater is 308 RPM, held by Natalia Kanounnikova. You can see a video of the spin here. When she starts the spin and her leg is extended, she's going somewhere between 1-2 revolutions per second. Let's

    asked by Bob
  66. math

    Graph the quadratic functions y = -2x^2 and y = -2x^2 + 4 on a separate piece of paper. Using those graphs, compare and contrast the shape and position of the graphs

    asked by Boobear
  67. Science

    Most microrganisms reproduce: A. Sexually B. asexually C. By meiosis A or B not sure

    asked by Tony
  68. Life Orientation

    3 environmental health that cause ill health

    asked by pitso
  69. Probability

    In a cookie jar, there are 6 choco chip cookies and 8 oatmeal cookies. Kim takes out the cookies one at a time and proceeds to eat them. The probability that the 7th cookie that Kim eats is a choco chip cookie is a/b, where a and b are positive coprime

    asked by Kim
  70. electrochem

    Between Mg and Zn which one is the anode and which one is the cathode? And between Mg and Fe which one is the anode and which one is the cathode? Please and thank you. im so stuck. :/

    asked by shyanne
  71. Alg 1

    Factoring to solve quadratic equations: Use the Zero-Product Property to solve each equation. Write your solution in roster form: The volume of a storage tub shaped like a rectangular prism is 24 ft^3. The height of the tub is 3 feet. The width is w feet

    asked by Jane
  72. Math

    find the accumulated value of an investment of 20,000 for 3 years at an interest rate of 7%, if the money is a compounded semiannually; b. coumpounded quaterly; c. compounded monthly d. coumpounded continuously.

    asked by Keresha
  73. finance Business

    What I the before-tax cost of 8.4% and the firm uses 35% what is QM's weighed average cost of capital.

    asked by Vernette
  74. Mathematics

    System 5x+8y+6z=14 2x+5y+z=12 -3x+6y-12z=20

    asked by Joe
  75. life orientation

    identify and state the human and environmental factors causing HIV the under discussion

    asked by siphesihle
  76. World Geography

    1. The Polish economy began to grow in the 1990s because the government A. built more state-owned factories. B. controlled prices better.

    asked by bree
  77. Soc. Studies

    Which description best captures Abraham Lincoln's approach to slavery before he signed the Emancipation Proclamation? A.Lincoln was himself pro-slavery, but thought that states should have the right to choose whether or not slavery was legal. B.Lincoln was

    asked by Cassie
  78. World Geography

    1.The physical feature of Western Europe where most major cities are found is called A. the plains. B. the glacier.

    asked by bree
  79. Chemistry

    If your partner did not take into account the vapor pressure of water when calculating the moles of hydrogen produced, would the mass of Mg that was calculated at the end of the experiment be too high or too low? Why?

    asked by Kate
  80. Chemistry

    If the strips of MG ribbon are coated with white MgO, would this cause the mass of Mg that you calculate to be too high or too low? Why?

    asked by Kate
  81. life orientation

    describe the negative impact of HIV on a person well being and society in general

    asked by siphesihle
  82. Chemistry

    Instead of a strip of pure Mg ribbon, you are accidentally given a strip of an aluminum-magnesium alloy. You calculate the mass of the strip as above. Would the mass of the strip be higher or lower than expected? Write the appropriate chemical equations

    asked by Kate
  83. Chemistry

    What volume of hydrogen, measured at 25 C and 1.00 atm can be produced by dissolving 5.0 g of magnesium in hydrochloric acid? (Write and balance the equation for the reaction first.)

    asked by Kate
  84. Chemistry

    A sample of iron reacted with hydrochloric acid. The liberated hydrogen occupied 40.1 mL when collected over water at 27 C at a barometric pressure of 750 torr. What is the mass of the sample of iron? (Because of the collection of gas over water, the vapor

    asked by Kate
  85. Chemistry

    If you wanted to prepare 50.0 mL of hydrogen, collected over water at 25 C on a day when the barometric pressure was 730 torr, what mass of aluminum would you react with a hydrochloric acid? (Balance the equation first.)

    asked by Kate
  86. Science

    A device that can be used both for cooling and heating is a _____. heat engine compressor heat pump vaporizer I think it is Heat pump..?

    asked by Cassie
  87. Science

    Most organisms reproduce: A. Sexual B. asexual C. By meiosis Is it b not sure between b and a

    asked by Tony
  88. English (Check Please)

    1. The speaker’s use of many exclamation points and imperative statements in “Beat! Beat! Drums!” helps readers feel the tone’s (Points : 3) humor. urgency. quiet calm. high spirits. 2. With what kind of life are the images in the second stanza of

    asked by Desean
  89. Calculus

    1. In a certain country, the percentage of the population relocating to a new town is given by the following function: p(t) = 20.6e^-0,009t,where 0 _< t _< 52. Time is zero (t = 0) corresponds to the year 1960. 1. Find the rate at which people relocated

    asked by Deeno
  90. FRENCHHHH

    conjugue les verbes a limparfait ou au passé compose guillame,quatorze ans,se rapelle son long sejour a l'hopital, quand il receivait la visite des animatuers de docteur clown,La premiere fois, j'ai cru(croire) qu'ils ______ (venir) d'une autre planete!

    asked by Mia
  91. Science

    What is the mass of LiF in 100.0mL of 0.10M solution?

    asked by Anonymous
  92. Science

    All objects emit _____ radiation. A.electromagnetic B.kinetic C.thermal D.solar I think it is A...?

    asked by Cassie
  93. please help analytical chemistry

    50 ml of a .1103M solution of formic acid is titrated with a .2511M NaOH. a) What is the pH before and NaOH is added? b) How many mL of NaOH solution must be added to reach the equivalence pt? c) what is the pH at the equivalence pt of the titration? d) If

    asked by Lana
  94. Science

    Fast food restaurants keep food hot with infrared lamps. The heat is transferred to the food by _____. condensation conduction convection radiation I think it is radiation...?

    asked by Cassie
  95. Science

    Air is a good conductor of heat. true false I think it is false...?

    asked by Cassie
  96. physics

    Longitudinal waves in a spring have a wavelength of 50mm.The vibrator making them is vibrating at 5 oscillations per second. Calculate the speed of the waves.

    asked by Percy
  97. physics

    Longitudinal waves in a spring have a wavelength of 50mm.The vibrator making them is vibrating at 5 oscillations per second. Calculate the speed of the waves.

    asked by Percy
  98. Science

    When you hold a ball above the ground it has kinetic energy. true false I think it is False - that is potential energy..right?

    asked by Cassie
  99. Math

    Bought 3 shirts & 2 pair pants for $85 and my friend bought 2 shirts & 5 pants for $130, and the shirts are the same price, what is the price of each shirt?

    asked by Anna
  100. Science

    A good refrigerant must have a low boiling point. true false I think it is true...?

    asked by Cassie
  101. Math Help

    Suppose that each student in stat. has a 9% chance of missing class on any given day and that student attendance is independent. In a stat. class of 20 students, find the probability that: 1) no student is absent 2) one student is absent 3) three student

    asked by Chris
  102. Physics

    A current I=2 Amperes flows in a circular single loop coil of radius R=10 cm. (a) Evaluate the magnitude of the magnetic field (in Tesla) at a point P on the axis of the coil, and a distance z=5 cm away from the plane of the coil itself

    asked by abdul rahman
  103. physics

    Consider two N-turn circular coils of radius R, each perpendicular to the axis of symmetry, with their centers located at z=±l/2 . There is a steady current I flowing in the same direction around each coil Assuming the N=100, I=2 Amperes, R=10 cm, l=2 cm

    asked by abdul rahman
  104. 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
  105. art history

    According to the lesson, most African art was created for all of these purposes EXCEPT:

    asked by Kristen
  106. Chemistry

    Which is the more concentrated solution: a solution made with .70 moles of NaCl in a .35L water or a 35g of NaCl in .75L?

    asked by Alexis
  107. Algebra

    I need some help with algebra I'm not sure how to get to the answer. Find the number of terms in each sequence. 1. a1=4 an=42 d=2 2. a1--0.3 an=-36 d=2.1 3. 1/12, 1/8, 1/6, 5/24, 1/4,......9/8 Evaluate each sum. 1. There is an e like symbol that has a 15

    asked by Jenny
  108. trig

    I am trying to get wxMaxima to give me arcsin(4/5), either in radians or degrees. I am using a: 4/5$ b:asin(a)$ print("the angle is ", b)$ But it returns the angle is asin(4/5) How do I get wxMaxima to give me the angle? I want .927 radians or 53.1

    asked by Josh
  109. Statistics

    Events and are mutually exclusive. Suppose event occurs with probability and event occurs with probability . Compute the probability that occurs or does not occur (or both). Compute the probability that either occurs without occurring or and both occur.

    asked by Jack
  110. physics

    An ideally efficient freezer cools food to 260 K. If the room temperature is 300K, how much work does the freezer consume when removing 100J heat from the food?

    asked by garnel
  111. Physics, diffraction, interference, help!

    3.Blue light (λ = 450 nm) shines on a diffraction grating that has 4000 lines/inch. A.Calculate the angle of the fourth-order image

    asked by Jamie
  112. Physics

    Mandy picks up a 25 N book from the floor to a height of 0.50m. How much work does Mandy do? (Hint use w=mg to find the force necessary to move the book)

    asked by Jennifer Tran
  113. English

    An international agreement that aims to reduce carbon dioxide emissions and the presence of greenhouse gases. Countries that ratify the Kyoto Protocol are assigned maximum carbon emission levels and can participate in carbon credit trading. Emitting more

    asked by Brittany
  114. math

    . Ms. Alison drew a box-and-whisker plot to represent her students’ scores on a mid-term test. Josh received 72 on the test. Describe how his score compared to those of his classmates. (1 point)About 25% scored higher; about 75% scored lower. Everyone

    asked by Terry
  115. Biochemistry

    In yeast, ethanol is produced from glucose under anaerobic conditions. What is the maximum amount of ethanol (in millimoles) that could theoretically be produced under the following conditions? A cell-free yeast extract is placed in a solution that

    asked by Josh
  116. Masemola high school

    Two institution or organisations that are involved in supporting or giving redress to these disasters. Teenage pregnancy, lack of infrastructure and genetically modified foods.

    asked by Thapelo tower
  117. science

    Suppose you hang an object of weight W by a string from a hanging spring scale, such as the kind used in some grocery stores. You then hang the scale with the object from the ceiling of an elevator. When the elevator is standing still, the scale will read

    asked by Hanna
  118. Algebra

    I need some help with algebra as I'm confused as to how to solve them. Find the common difference d and the value of a1 using the information given. 1. a6= 5/4, a8= 9/4 Evaluate each sum. 2. E like symbol that has a 29 on the top. On the bottom n=1 and to

    asked by Jenny
  119. Physics AP

    An ideal monatomic gas expands isobarically from state A to state B. It is then compressed isothermally from state B to state C and finally cooled at constant volume until it returns to its initial state A. How much work is done on the gas in going from B

    asked by Emilea
  120. finance

    Fashion Distributors Incorporated currently sells on terms of 2/10, net 30, with bad debt losses at 1% of gross sales. Of the 99% of the customers that pay, 50% take the discount and pay on Day l0; the remaining 50% pay on Day 30 (average collection period

    asked by raj
  121. AP Chemistry

    So I have the reaction 2HBr(g) H2(g)+Br2(g) I'm supposed to find the equilibrium constant, K, using free energy (G) values. The values in my textbook for G of H2 and Br2 were zero, and the value for HBr(g) was -53.5. So, to find delta G I did products -

    asked by Casey
  122. ABC

    How many integers n satisfy the inequality 21≤n≤47?

    asked by Anonymous
  123. stastics

    For each of the following confidence intervals, indicate how much of the distribution would be placed in the cutoff region for a two-tailed test from 80%, 85% and 99%

    asked by jerry
  124. abc

    How many elements are in the set {10,12,14,…,48,50}?

    asked by Anonymous
  125. life orientation

    one environmental or human factor that causes ill health,accidents,crises and disasters within south africa

    asked by nokuthula
  126. business math

    A computer with software costs $2,987, and Docie Johnson has agreed to pay 19% per year finance charge on the cash price. If she contracts to pay the loan in 18 months, how much will she pay each month?

    asked by tmouery
  127. PHILOSOPHY

    Who claimed that our subjection to pain and pleasure should be the foundation for our lives?

    asked by James
  128. Science

    When 2 resistors, R1 and R2 are connected in series across a 6V battery the potential difference across R1 is 4V. When R1 and R2 are connected in parallel to the same battery the current through R2 is 0.45 A. Find the values of R1 and R2. Thanks :)

    asked by Lisa
  129. Physics(Simple Harmonic motion and Elasticity)

    A copper rod (length = 2.0 m, radius = 3.0 * 10^-3 m) hangs down from the ceiling. A 9.0-kg object is attached to the lower end of the rod. The rod acts as a “spring,” and the object oscillates vertically with a small amplitude. Ignoring the rod’s

    asked by Elapid
  130. Algebra

    the angle of elevation from bottom to the top of the mountain has a measure of 60 degrees. suppose a ski lift to the top is 2000 feet long. how high is the mountain to the nearest feet? Am I suppose to find the sine of 60?

    asked by Casey
  131. maths-

    Given: B={1},find no. of elements of P[P{P(B)}].

    asked by anoynomous
  132. Statistics

    The Boeing 757-200 ER airliner carries 200 passengers and has doors with a height of 72 inches. Heights of men are normally distributed with a mean of 69 inches and a standard deviation of 2.8 inches. b) assume that half of the 200 passengers are men, what

    asked by Liz
  133. Mathematics

    6x + 7 = 55 x = 8 Is this the correct answer to the following question? "I'm thinking of a number. If you multiply it by 6 and then add 7, you will get 55. What is my number?"

    asked by Anonymous
  134. jardan high. general science

    water,anchorge,photosynthesis,mineral,food,support. The main functions of roots are { } and taking in { } and { }. The stems { } the other parts of the plant and transport { },{ } and around the plant.the leaves are the main part making { } by { }.

    asked by will
  135. life orientation

    Ways in which humans or environmental problems impacts on the community

    asked by kerry
  136. Math

    I got an answer by trial and error but need to know how to set the problem up. Bob bought 10 movies for $153. The DVDs were $12 and the BluRays were $23. How many of each did Bob buy? 7 DVDs and 12 BluRays. Thank you for help.

    asked by Joci
  137. mathematics

    Given: B={1},find no. of elements of P[P{P(B)}].

    asked by anoynomous
  138. Please help science

    Most organisms reproduce: Sexually Asexually By meiosis Is it asexually or sexually not sure I think it is asexually though

    asked by Tony
  139. Mathematics

    Is this the correct answer to the following question? "A shake at the Shake Shack costs $0.80. The bill for three burgers and a shake was $4.40. How much is a burger?" $4.40-$0.80= $3.60 $3.60/3= $1.20 My answer: $1.20

    asked by Anonymous
  140. Physics

    A series RCL circuit has a resonant frequency of 1470 Hz. When operating at a frequency other than 1470 Hz, the circuit has a capacitive reactance of 5.0 Ù and an inductive reactance of 29.0 Ù. (a) What is the value of L? 1 H (b) What is the value of C?

    asked by Anonymous
  141. Math help

    Which of the following is an example of a dependent event? 1 flipping two coins 2 rolling a number cube and spinning a spinner 3 choosing two scoops of ice cream 4 choosing a cookie at random, eating it, and then choosing another at random

    asked by Mr.Brain
  142. English

    What is the most important reason to consider typography when creating a procedural text?

    asked by Kel Marie
  143. English

    How might an instruction manual designed for troubleshooting differ from an instruction booklet designed for improving performance in a skill?

    asked by Kel Marie
  144. fractions

    how can you tell that a fraction is a unit fraction?

    asked by ttuuffyy
  145. Please help with Statistics

    : Is Scanner Accuracy the Same for Specials? 176 miles on Wednesdays, 181 miles on Thursdays, and 108 miles on Fridays. He wonders if this evidence contradicts his belief in a uniform distribution of miles across the days of the week. Explain why it is not

    asked by Bettie
  146. Mathematics

    Is this the correct answer to the following question? "You can ride a bicycle 15 mph. Your sister rides 12 mph. You give her a one hour head start. In how many hours will you catch up if neither of you stops?" 15-12= 3 12/3= 4 My answer: 4 hours.

    asked by Anonymous
  147. Trig

    Solve the equation on 0° ≤ θ < 360° and express in degrees to two decimal places. sin(2θ) = -0.7843 I've gotten 308.345° (QIV) and 231.655° (QIII). I'm unsure how to get the answer though? The final answer is: 115.83°, 295.83°, 154.17°,

    asked by Mary
  148. math

    Selma went to the mall and spent 1/3 of her money. She then lost 1/2 of what she had left. She then had $5. How much money did Selma originally have? I know the answer is 30 but how do I explain others how to figure it out easily?

    asked by CGM
  149. Physics

    In 1996, NASA performed an experiment called the Tethered Satellite experiment. In this experiment a 2.20 104-m length of wire was let out by the space shuttle Atlantis to generate a motional emf. The shuttle had an orbital speed of 7.50 103 m/s, and the

    asked by Don
  150. chemistry

    Which weak acid would be best to use when preparing a buffer solution with a pH of 8.50? 1) an acid with Ka=3.3x10^-9 2) an acid with Ka=5.0x10^-4 3) an acid with KA=6.3x10^-6 4) an acid with Ka=5.0x10^-7 5) an acid with Ka=4.0x10^-5 6) an acid with

    asked by Anonymous
  151. Chemistry

    What mass (g) of magnesium chloride (MgCl2) must react with sulfuric acid (H2SO4) to release 890.2 ml of Hydrogen chloride (HCl) gas at STP according to the following equation? Round to one decimal place. MgCl2 (s) + H2SO4 --> MgSO4 (aq) + 2 HCl

    asked by Linzy
  152. chem

    If a buffer solution is 0.170 M in a weak acid (Ka = 7.8 × 10-5) and 0.500 M in its conjugate base, what is the pH?

    asked by Anonymous
  153. Chemistry

    What mass (g) of water is produced by the combustion of 48.8 g of propane according to the following reaction? Round your answer to one decimal place. C3H8(g) + 5 O2(g) --> 3 CO2(g) + 4 H2O (l)

    asked by Linzy
  154. Chemistry

    If a buffer solution is 0.160 M in a weak base (Kb = 2.3 × 10-5) and 0.550 M in its conjugate acid, what is the pH?

    asked by Felicia
  155. Chemistry

    What mass(g) of hydrogen gas is produced by decomposing 179.1 g of water. Round your answer to one decimal place. 2 H2O(s) --> 2 H2(g) + O2 (g)

    asked by Linzy
  156. chemistry

    1L of a .2M solution of Ethanoic acid is altered by adding 5.00g of sodium butanoate. what is the pH of the new solution

    asked by Lana
  157. Chemistry

    2Mg + O2 ¨ 2MgO How many grams of MgO are produced when 79.5 grams of O2 react completely with Mg according to this equation?

    asked by Linzy
  158. achem

    1L of a .2M solution of butanoic acid is altered by adding 5.00g of sodium butanoate. what is the pH of the new solution?

    asked by Lana
  159. Chemistry

    A hospital glucose solution is analyzed to verify its concentration. A 10.0 mL sample with a mass of 10.886 is evaporated to dryness. If the solid glucose residue has a mass of 0.648, what is the m/m% concentration?

    asked by Linzy
  160. Chemistry

    How many grams of Na2CO3 can be found in a 273 mL sample of 0.5 M solution

    asked by Linzy
  161. Chemistry

    What is the mass (g) of nickel(II) nitrate (182.71 g/mol) dissolved in 160.4 mL of 0.100 M Ni(NO3)2 solution?

    asked by Linzy
  162. Chemistry

    The half-equivalence point of a titration occurs half way to the end point, where half of the analyte has reacted to form its conjugate, and the other half still remains unreacted. If 0.220 moles of a monoprotic weak acid (Ka = 5.7 × 10-5) is titrated

    asked by Felicia
  163. Life orientation

    Identify 3 environmental health hazards that cause ill health,accidents,crises, and disasters within the south african community and globally

    asked by Relebogile
  164. Chemistry

    What is the molarity of a saline solution that contains 3.6 g NaCl (58.44 g/mol) dissolved in 100.0 mL of solution?

    asked by Linzy
  165. Chemistry

    What is the molarity of a sucrose solution that contains 76.7 g of C12H22O11 (342.34 g/mol) dissolved in 138.2 mL of solution

    asked by Linzy
  166. Chemistry

    A 2.5% KCl solution is prepared by dissolving enough of the salt to give 181.4 g of solution. What mass (g) of water is required?

    asked by Linzy
  167. Chemistry

    What volume(ml) of 8.0 M solution is required to make 134.3 ml of 1.2 M solution

    asked by Linzy
  168. L0

    5 factors that contribute to hiv

    asked by Thama
  169. Chemistry

    You have a stock solution of 5.0 M H2SO4. How many mL of stock solution are required to make 136 mL of 1.6 M H2SO4 solution

    asked by Linzy
  170. Algebra please help!!

    Find the number of terms in each sequence. 1. 2,-6, 18,-54,,,,,-4374 Find the common ratio r and the value of a1 using the information given. (assume r >0) 2.a3=324, a7=64 Find the indicated sum. 3. a1=2, r=-3; find s8 4. E like symbol with a 10 on top. On

    asked by Jenny
  171. Algebra please help!!

    Find the number of terms in each sequence. 1. 2,-6, 18,-54,,,,,-4374 Find the common ratio r and the value of a1 using the information given. (assume r >0) 2.a3=324, a7=64 Find the indicated sum. 3. a1=2, r=-3; find s8 4. E like symbol with a 10 on top. On

    asked by Jenny
  172. Algebra please help!!

    Find the number of terms in each sequence. 1. 2,-6, 18,-54,,,,,-4374 Find the common ratio r and the value of a1 using the information given. (assume r >0) 2.a3=324, a7=64 Find the indicated sum. 3. a1=2, r=-3; find s8 4. E like symbol with a 10 on top. On

    asked by Jenny
  173. Check answers please Statistics

    Suppose that each student in stat. has a 9% chance of missing class on any given day and that student attendance is independent. In a stat. class of 20 students, find the probability that: 1) no student is absent =15.16 2) one student is absent =30 3)

    asked by Chris
  174. L.O

    In 10-15 lines critically discuss 5 ways in which the human or environmental problem impacts on the community of homelessness

    asked by Nomfundo
  175. math

    3m + 8 = m

    asked by kemi
  176. haramaya/dinamics

    the skier leaves 20degre surface at 10m/s a)determine the distance d to the point where he lands

    asked by aniso
  177. math 118

    On a math test a student where the mean is 50 and the standard deviation is 12, a student has a z-score of 0.83. What did the student score on the test?

    asked by Stacey
  178. Statistics Help please

    Is Scanner Accuracy the Same for Specials? In a study of store checkout scanning systems, samples of purchases were used to compare the scanned prices to the posted prices. The accompanying table summarizes results for a sample of 819 items. When stores

    asked by Bettie
  179. Physics

    A loop of wire has the shape shown in the drawing. The top part of the wire is bent into a semicircle of radius r = 0.12 m. The normal to the plane of the loop is parallel to a constant magnetic field ( = 0°) of magnitude 0.85 T. What is the change ÄÖ

    asked by Don
  180. M.H.S

    Marry claims that she can shoot a stone 50m vertically high using slingshot .what is the relationship of the height reached by the stone and initial velocity of it?

    asked by Nation
  181. science

    10 students whose combined mass is 700 kg ride down 30 m in a elevator. How much thermal energy is produced in the elevator system by the loss in gravitational potential energy of the students

    asked by Anonymous
  182. life orientation

    five ways in which xenophobia problem impact on the community

    asked by dolly
  183. Statistics help Please

    The table below reports birth weight and whether the mother smoked for 189 pregnancies. If Smoking and Birthweight were independent, then we would expect the number of low birth weight babies born to smoking mothers to be: (???/???) * ??? = 23.1 The

    asked by Bettie
  184. math

    can u help me with my algebra

    asked by khadaja
  185. Life science, history, geography, and maths literacy

    I'm in grade 11 and i was wondering if you could help me with this question. I'm doing those subjects and i would love to take a career that is linked in those subjects, what would they be?

    asked by Ernest
  186. Mathematics

    Is this the correct answer to the following question? "You can ride a bicycle 15 mph. Your sister rides 12 mph. You give her a one hour head start. In how many hours will you catch up if neither of you stops?" 15-12= 3 12/3= 4 My answer: 4 hours.

    asked by Anonymous
  187. Algebra 2

    A teacher is choosing 4 students from a class of 30 to represent the class at a science fair. In how many ways can the teacher choose the students?

    asked by Lea
  188. Physics

    A long, narrow rectangular loop of wire is moving toward the bottom of the page with a speed of 0.021 m/s (see the drawing). The loop is leaving a region in which a 2.7 T magnetic field exists; the magnetic field outside this region is zero. During a time

    asked by Anonymous
  189. math

    How do you write out 121.2 million

    asked by TJ
  190. aig math(Ms.Sue)

    Your school librarian has asked your class for some help on the purchase of some new bookcases with 2 shelves each. She has 300 new books she needs to shelve. 1/2 of the books are half an inch thick. 1/3 of them are 1/4 of an inch thick, and the rest are

    asked by lidia
  191. physical science chemistry

    calculate the mass of sodium nitrate needed to make 550 ml of solution of concentration 0;2 mol.dmc to the power of minus 3

    asked by Thuba
  192. Mathematics

    "One number is 5 more than another. Their sum is 53. What are the two numbers?"

    asked by Anonymous
  193. physics

    A string of 15 identical Christmas tree lights are connected in series to a 127 V source. The string dissipates 58 W.What is the equivalent resistance of the light string? Answer in units of Ω

    asked by Tony
  194. CHECK ANSWERS AND HELP PLEASE

    if P(A)=.60, P(A/B)=.50, AND P(B)= .40, answer the following. 1) events A and B are independent =FALSE true or false or cannot determine 2) events A and B are disjoint =TRUE true or false or cannot determine 3) find P(A and B) =??????

    asked by MELISSA
  195. science P2

    calc the volume of solution that contains 5,3 g of sodium carbonate if the solution has a concentration of 0,4 mol-dm (to the power of minus 3)

    asked by Thuba
  196. math plz help

    3. The number cube shown is rolled and the spinner shown is spun. Find P(5 and blue). the number cube goes to five. the spinner has four spaces. 1 is blue 4. The number cube shown is rolled and the spinner shown is spun. Find P(an odd number and yellow).

    asked by Anonymous
  197. physics

    A string of 15 identical Christmas tree lights are connected in series to a 127 V source. The string dissipates 58 W.What is the equivalent resistance of the light string? Answer in units of Ω

    asked by Tony
  198. Precalculus Test

    I have a precalculus test coming up and I'm not really understanding how to do everything. Please help. 1. Find the angle betweem 0 and 2pi which is coterminal to the angle -(7pi)/5. Now convert the angle you just found to degrees.

    asked by marie darling
  199. math

    38.61/39.00

    asked by Anonymous
  200. engineering

    Mary Williams needs to change a Fahrenheit temperature to Celsius. Use the Fahrenheit temperature of 80 degrees to test your solution.

    asked by Anonymous
  201. math

    You are developing a data base for Army tracked combat vehicles and you are normalizing the data base to base year 2006 dollars. What number would you enter into the data base for a vehicle budgeted at $1,725,000 in the FY08 appropriation? $1,604,505

    asked by Shawn
  202. math

    Manny is painting 5 cubes that are each 2 inches long. He needs to paint each cube twice. How much surface area total will he paint?

    asked by Sari-Grace
  203. math

    There are 6 pizzas for 8 people. If the pizzas are divided equally, how much pizza will each person receive?

    asked by Holly
  204. algebra.. HELP ME!!

    Mai spends 7 3/4 hours in school each day. Her lunch period is 1/2 hour long, and she spends a total 7/10 hour switching rooms between classes. The rest of her day is spent in 6 classes that are all the same length. How long is each class?

    asked by syram
  205. algebra2

    What are the mean, variance and standard deviation of these values? 62,41,54,60,49,58.

    asked by Lea
  206. Algebra.... SOMEONE HELP ME!!!!

    A rectangular room on a blueprint is 2 inches wide and 5 inches long. If the scale of the blueprint to the actual room is 1:72, what is the width of the room?

    asked by syram
  207. physical science

    The orbital velocity of an earth satellite in an orbit 400 mi above the earth?

    asked by ben
  208. Science

    PLEASE HELP MY DAUGHTER WANTS ME TO CHECK HER HOMEWORK AND I DON'T KNOW TO MUCH ABOUT SCIENCE LOL! BUT PLEASE HELP PLEASE PLEASE HELP ME PLEASE 'IN YOUR OWN WORDS PLEASE' PLEASE PLEASE PLEASE 'IN YOUR OWN WORDS' IN YOUR OWN WORDS PLEASE' I'M BEGAN YOU

    asked by Bella (The Parent)
  209. physics

    A spherical mirror is polished on both sides. When the concave side is used as a mirror, the magnification is +2.7. What is the magnification when the convex side is used as a mirror, the object remaining the same distance from the mirror? If the object is

    asked by Anonymous
  210. algebra 2

    In a cooler there are 8 bottles of grape juice and 12 bottles of orange juice. There are also 6 blueberry yogurts and 9 strawberry yogurts. If you grab a bottle of juice and a yogurt without looking, what is the probability that you get a grape juice and a

    asked by Lea
  211. Algebra

    I just cannot seem to get these two problems. Any help is greatly appreciated. Use the method of substitution to solve the system. xy= 4 5x − y + 19= 0 and y^2 − 4x^2 = 7 9y^2 + 16x^2 = 323

    asked by jobe
  212. Albebra 2

    A school wants to determine the average time it takes students to get to school. Every student coming off the bus is surveyed. What is the sampling method used? Does the sample have a bias?

    asked by Lea
  213. algebra 2

    In a high school, 35% of the 3500 students participate in sports. The school board is proposing a participation fee to help with costs. To get student opinion, the school board randomly selects a committee of 6 students to join a discussion of the

    asked by Lea
  214. algebra 2

    Students at a high school all took the same English test. The scores are approximately normally distributed with a mean of 77 and a standard deviation of 9. If 2500 students took the test, approximately how many scored above 86 or below 68%?

    asked by Lea
  215. math

    computer can do 1000 operations in 4.25 X 10 to the 6th power, how many operations can this computer do in an hour?

    asked by sharon
  216. algebra

    Find the number of terms in each sequence. 1. 2,-6, 18,-54,,,,,-4374 Find the common ratio r and the value of a1 using the information given. (assume r >0) 2.a3=324, a7=64 Find the indicated sum. 3. a1=2, r=-3; find s8 4. E like symbol with a 10 on top. On

    asked by Anonymous
  217. math

    an oak tree grows 500 meters north of the bottom of a rectangular park. The oak tree takes up a space of a circular area with a radius of 2.5 meters .The center of the tree is 24 meters from the left side of the park .The park is 200 meters wide and has a

    asked by aspasia
  218. Mathematics

    "Kim is 15. Kim's father is 39. In how many years will Kim's father be exactly twice as old as Kim will be?"

    asked by Anonymous
  219. algebra

    soybean meal is 14% protein; cornmeal is 7% protein. How many pounds of each should be mixed together in order to get 280-lb mixture that is 125 protein?

    asked by Anonymous
  220. Science ms sue please help

    A horse and a donkey can mate with each other. Their offspring,called a mule, is not fertile. Do horses and donkeys belong to the same species? Explain your answer. A scientist collects wild rabbits that live at sea level and moves them to the mountains.

    asked by Gabby
  221. Science

    Describe what happens to body systems over time from infancy to adulthood to older adulthood. In your own words please. thank you guys ;)

    asked by Sandy
  222. to ms sue

    do you how to do probality? if so can you look at my question

    asked by Anonymous
  223. math beyond this

    Is there a way to make this look nicer? x^2+4x (208/x^2)

    asked by Iggy
  224. Applied calculas

    1. Consider the function y = xx (for x > 0). a) Why does the derivative rule for xn not apply? b) Why does the derivative rule for ax not apply? c) What are the four magic properties of logarithms? d) Take the ln of both sides. Use the properties of

    asked by jack
  225. physics

    The mean diameters of X and Y, two planets in the same solar system, are 7.0 103 km and 1.4 104 km, respectively. The mass of X is 0.15 times the mass of Y. The value of g on Y is 8.6 m/s2. (a) What is the ratio of the mean density of X to that of Y (ρX /

    asked by Rachel
  226. Applied calculas

    Let y=〖tan〗^(-1) x Rewrite it as an equation involving a trig function. Use implicit differentiation to determine an expression for y.

    asked by jack
  227. Applied calculas

    3. a) Write out the limit definition for the derivative of y = xx. Attempt to solve it. b) Write out the limit definition for the derivative of the inverse trig function from question 2. Attempt to solve it. c) Discuss the value of implicit

    asked by jack
  228. math

    A barrel contains 15 liters of water. After a boulder is dropped into the water, the reading on the barrel is 22 liters. What is the volume of the boulder?

    asked by Anonymous
  229. Math

    A farmer is planting squash plants that need 2 3/8 feet to spread out. He has an area along a fence that is 20 feet long. Round the amount of space the squash plants need to the nearest 1/2 foot. How many squash plants can the farmer grow along the fence?

    asked by Laura
  230. SS Please check answers

    1. The admission of Missouri as a slave state was controversial in the Senate because the Senate was pro-slavery. it would create sectionalism. **it would upset the balance. the Senate was anti-slavery. 2. The main topic of the Lincoln-Douglas debates was

    asked by Jman
  231. social studies

    what wiped out most of the indigenous population of australia

    asked by Chloe
  232. Math

    I think this is geometry: There is a small box with a black frame around it. Inside the box, at the bottom, is an 8. Inside the box, to the right, is a 2. It looks like they are showing Length & Height. On the outside of the box, under the 8, there is a

    asked by Sandy
  233. science/math

    A barrel contains 15 liters of water. After a boulder is dropped into the water, the reading on the barrel is 22 liters. What is the volume of the boulder?

    asked by Anonymous
  234. Math

    You earned a $25 gift card by working in Apangea and have purchased four items. Please list these items in the table below along with their cost. Then calculate the cost of each item as a fraction a decimal and as a percentage. 1.Pack of pencils Amount

    asked by Jerald
  235. Math

    Please explain how to solve this problem. 7x-6/3 + 4(8+2x)

    asked by Janie
  236. math

    Which one is need to happen in order for a shadow to occur?

    asked by Anonymous
  237. chemisty

    Calculate the volume of 4.0ml of nitogen gas at 754mmhg and 25 degrees celcius

    asked by zane
  238. Precalculus

    Jessica deposited $785 into an account that pays 6.2% interest compounded continuously. How long will it take until Jessica has $1000?

    asked by Megan
  239. math HELP

    A barrel contains 15 liters of water. After a boulder is dropped into the water, the reading on the barrel is 22 liters. What is the volume of the boulder?

    asked by Anonymous
  240. Creative Writing

    I know I asked this earlier, but right now I want to know if this is close enough to the original Alice in Wonderland to be a fractured fairytale (I've never seen Alice in Wonderland before and don't have enough time to watch it and write this before it's

    asked by Millie
  241. Math

    Cheryl counted all of her quarters and announced to her family that she had 32/4 dollars. How many dollars were her quarters really worth? A.32 dollars B.1 dollar 70 cents C.8 dollars D.128 dollars C

    asked by Jerald
  242. Grammar PLease Check MY answers!

    Put brackets [ ] around the adverb in each of the following sentences. Write how if the adverbs tell how, when if the adverbs tells when, or where if the adverb tell where the action takes place. 1. Tameesha thought her prom gown draped beautifully. 2. She

    asked by Mandie
  243. Science --

    If you mixed 25.00g of salt in 100.00mL of water and it all dissolved, what would the concentration be in g/mL?

    asked by Marco
  244. LA

    What do you learn from the dialogue between Mr. Frank and Miep at the beginning of Scene 1? A;Miep wants to show Mr. Frank something in the building. B;Mr. Frank wants to live in this building to hold on to his memories. C;The war has ended, but Mr. Frank

    asked by jeff
  245. math check answer

    1. Which of the following is an example of a dependent event? flipping two coins rolling a number cube and spinning a spinner choosing two scoops of ice cream **choosing a cookie at random, eating it, and then choosing another at random 2. Which of the

    asked by Jman
  246. Mathematics

    "Kim is 15. Kim's father is 39. In how many years will Kim's father be exactly twice as old as Kim will be?"

    asked by Anonymous
  247. math

    What is 88% of $33?

    asked by Anonymous
  248. Calculus

    1. In a certain country, the percentage of the population relocating to a new town is given by the following function: p(t) = 20.6e^-0,009t,where 0 _< t _< 52. Time is zero (t = 0) corresponds to the year 1960. 1. Find the rate at which people relocated

    asked by Deeno
  249. science

    With the class watching from a safe (and dry!) distance below, suppose the student drops the balloon and the balloon hits the sidewalk with a force of 20 N. How much work was done on the sidewalk by the balloon?

    asked by Janny
  250. geometry

    There is a square with a star inside. The square has 25cm to show the length of one side. On the right, outside the square, it says 125cm squared, with a line pointing the center of the star in the square. The question is; The target of a shooting game

    asked by Sandy
  251. reading

    what does the quote help us understand, or explain "reading furnishes the mind only materials of knowledge it is thinking that makes what we read"

    asked by Anonymous
  252. geometry

    On my last question, just posted, I asked what percent of the area of the target was shaded. The answer options were 5%, 10%, 20% or 80%?

    asked by Sandy
  253. Math

    2 divide 69.28 plz give work too!

    asked by James
  254. physics

    A converging lens (f1 = 24.0 cm) is located 56.0 cm to the left of a diverging lens (f2 = -28.0 cm). An object is placed to the left of the converging lens, and the final image produced by the two-lens combination lies 20.3 cm to the left of the diverging

    asked by Anonymous
  255. biology/ help please

    which part of a neuron in the cerebellum of the brain is the most extensive in terms of anatomical developement? a-hillock region b-cell body c-dendrites d-nucleus e-axon -my answer is axon

    asked by joy
  256. Science

    Two parents have three children. They have two girls and one boy. What is the probability that the next child will be a boy?

    asked by Bobby
  257. Physics

    A long horizontal wire carries a current of 48A . A second wire, made of 2.6mm diameter copper wire and parallel to the first, is kept in suspension magnetically 15cm below(Figure 1) . Determine the magnitude of the current in the lower wire.

    asked by bud
  258. physics

    A 570-turn solenoid is 19cm long. The current in it is 32A . A 2.0cm -long straight wire cuts through the center of the solenoid, along a diameter. This wire carries a 27A current downward (and is connected by other wires that don't concern us). What is

    asked by bud
  259. Chemistry

    First, the question I'm given is: What is the pH of a 1.0 L solution containing 0.25M acetic acid and 0.75M sodium acetate ( Ka for acetic acid= 1.8x 10-5) So I took the -log(1.8x10-5)= 4.74+log(.75/.25)= 5.22 pH But then I'm asked if .050 mol NaOH is

    asked by Marcus
  260. Chemistry

    titration of a 50.00mL of KOH required 175.00mL of 0.0150M acetic acid, what is the Molarity of KOH solution

    asked by Shay
  261. Math

    The tempreture was negative two degrees Celsius before it dropped 10 degrees. What was the tempreture after the drop?

    asked by Travius
  262. Chemistry

    What is the pH of a 0.1 M NaOCl solution (Ka of HOCl is 2.95 x10-8) I did: x squared/.10= 2.95x10-8 x squared= 2.95x10-9 x= 5.43x10-5 -log(5.43x10-5)= 4.27 pH However, the options I'm given are either a.) 3.74 b.) 6.47 c.) 8.23 d.) 10.27 What steps am I

    asked by Marcus
  263. Reading/Maps

    This is what I have to do "Draw a map of mainland U.S.A. and show (draw)how the mississippi river divides the country (part of the labeling) and label both sides correctly." I was wondering if you can find me a map that way I can start it off like how

    asked by Anon
  264. Mathematics

    "The Rag Bag is having a '20% Off' sale. A pair of pants is on sale for $16. How much was it to begin with?"

    asked by Anonymous
  265. chemisty

    what volume will be occupied by 3.25mol of oxygen gas at 735mmhg and 25celcius?

    asked by raw
  266. Newton's Laws

    1. An 1760 kg car is moving to the right at a constant velocity of 2.94 m/s. (a) What is the net force on the car? (b) What would be the net force on the car if it were moving to the left? 2.A freight train has a mass of 6 107 kg. If the locomotive can

    asked by Cole
  267. Math

    A rectangular parcel of land has an area of 2,000 ft2. A diagonal between opposite corners is measured to be 10 ft longer than one side of the parcel. What are the dimensions of the land, correct to the nearest foot?

    asked by Jacks
  268. 7th grade math/ geometry

    how to name an angle in four ways?

    asked by karizma
  269. Chemistry

    Ba(OH)2 is a strong electrolyte. Determine the concentration of each of the individual ions in a 0.700 M Ba(OH)2 solution. I know that Ba(OH)2 -> Ba + 2OH But how do I determine the concentrations? I feel like I am making this more complicated than need be

    asked by Hana
  270. FRM 121 Fashion History II

    Describe the stages in the Victorian and Bustle Era acquisition of adult clothing by male and female children in the late 19th century?

    asked by Tomika Davis
  271. stat probability

    A multiple choice quiz consists of 20 questions, each with 3 possible equally likely answers. If a student guesses at the answer to each question, then the mean number of correct answers selected by the student is?

    asked by Lynn
  272. stat probability

    Find the mean of the distribution shown. x 2 5 7 P(x) 0.28 0.42 0.30 What is the mean and the standard deviation of this distribution?

    asked by Lynn
  273. stat probability

    The number of movies shown in different theatres on Saturday morning in a small city is given in the following. x P(x) 1 0.15 2 0.20 3 0.30 4 0.10 What is the mean distribution (or expectation) of the data given above?

    asked by Lynn
  274. stat probability

    A coin is tossed 4 times. Find the probability that the 4th toss is a tail, given that the first 3 tosses were all heads.

    asked by Lynn
  275. stat probability

    According to an Internet posting, 65% of adults enjoy drinking soda. Choose a group of 12 adults at random. The probability that none of them enjoy drinking soda is?

    asked by Lynn
  276. stat probability

    An apartment building has the following apartments: 2 bdrm 3 bdrm 4 bdrm 1st floor 7 3 4 2nd floor 9 0 11 3rd floor 8 4 7 If an apartment is selected at random, what is the probability that it is a 2 bedroom apartment on the 3rd floor?

    asked by Lynn
  277. Algebra 1

    y=3x+11 2x+y=1 method: __________ x= ____________ y= _____________

    asked by ki
  278. stat probability

    At a certain college, there were 780 science majors, 320 engineering majors, and 390 business majors. If one student was selected at random, the probability that they are a business major is?

    asked by Lynn
  279. physics

    Suppose the Sun is 1.52669 × 108 km from Earth. The speed of light is 2.99792 × 108 m/s. How long does it take for its light to reach us? Answer in units of min

    asked by hannah
  280. Analytic Geometry/Calculus

    We didn't go over the perpendicular form in class, only the parallel. Find the general form of the equation of the plane passing through the point and perpendicular to the specified vector or line.

    asked by Arya
  281. Three Dimensions/Calculus

    Find the general form of the equation of the plane passing through the point and perpendicular to the specified vector or line. P= (2,1,2) which is perpendicular to n=i

    asked by Aunna
  282. Literature

    "Slowly, silently, now the moon Walks the night in her silver shoon This way, and that, she peers, and sees Silver fruit upon silver trees; One by one the casements catch Her beams beneath the silvery thatch; Couched in his kennel, like a log, With paws of

    asked by Anonymous
  283. mathematics

    The perimeter of a square is 17.6cm.find the length of one side of the square

    asked by raheim mckenzie
  284. science

    1. _____ is the process by which food is broken down so that nutrients can be used by the body. (1 point) Absorption Digestion Elimination Ingestion 2. What type of digestion takes place in the mouth? (1 point) chemical mechanical chemical and mechanical

    asked by Anonymous
  285. math

    many of the health fads were actually healthful. what does the word ''healthful'' mean? a- not healthy b- full of health c- cause to be healthy d- a state of health

    asked by shohanur
  286. Newton's Laws

    1. An 1760 kg car is moving to the right at a constant velocity of 2.94 m/s. (a) What is the net force on the car? (b) What would be the net force on the car if it were moving to the left? 2.A freight train has a mass of 6 107 kg. If the locomotive can

    asked by Sarah
  287. math

    how to find volume of a triangle

    asked by VLB
  288. math

    ted has 8 autographed baseballs. all together the baseballs are worth $200.00 explain why you do not have enough information to make a bar diagram to find the value of each baseball.

    asked by help
  289. math

    what number is greater than 55 but less than 60, is not an odd number, and when you add up the 2 digits, it equals 7?

    asked by Paul
  290. Calculus

    Implicit Differentiation. (x-3)^2+(y+2)^2=25

    asked by Henry
  291. Years ?

    "In the early 1930s" what years are those like 1900-1930 right?

    asked by Anon
  292. Venn Diagram Help Please

    If P(A)=.60, P(A/B)=.50, AND P(B)= .40, answer the following. draw a venn diagram for the probabilities of A and B.

    asked by MELISSA
  293. Literature

    "Slowly, silently, now the moon Walks the night in her silver shoon This way, and that, she peers, and sees Silver fruit upon silver trees; One by one the casements catch Her beams beneath the silvery thatch; Couched in his kennel, like a log, With paws of

    asked by Anonymous
  294. Chemistry

    a sample of helium gas has a volume of 1.25L at -125celcius and 50.0atm. the gas is compressed at 50.0 atm to volume of 325ml. what is the final temperature of the helium gas in Celcius

    asked by Mckee
  295. Chemistry

    The Ksp for nickel(II) hydroxide is 5.47E-16. What is the base dissociation constant for nickel(II) hydroxide? So I started off doing Ni(OH)2 (s) Ni2+ (aq) + 2OH- (aq) I ..........................0 .................0 C ........................+x

    asked by a Canadian
  296. chemistry

    comment that enthalpy of nutralization is merely the heat of formation one-one mole of liquid water

    asked by shaheer
  297. Physical science

    According to the law of the conservatives of mass, if the products o a reaction have a mass of 64.0 g, then the total mass of the reactants:

    asked by Yannie
  298. math

    Say the price of a gallon of milk was raised from $3.00 to $3.50. What was the percent increase? Round to the nearest whole percent.

    asked by Jennifer
  299. Accounting

    The Divine Merchandising Corporation began March operations with merchandise inventory of 6 units, each of which cost $27. During March, Divine Merchandising made the following purchases: (1) March 4, 12 units @ $28 per unit, (2) March 15, 18 units @ $30

    asked by Kai
  300. science

    A biochemist used 10.000 grams of P-32 in a test on plant growth but forgot to record the date of his experiment. When he measured the amount of phosphorus-32 on another day, he found only 1.250 grams of the isotope remaining. If the half-life of P-32 is

    asked by Candace
  301. life orientation

    Critically discuss 6 ways in which the environment health hazard can impact negativly on ones health

    asked by itumeleng
  302. Math

    Billy has a board that's six and 2/3 feet long. He cuts it into 12 equal pieces. How long is each piece?

    asked by Pierre
  303. hastings

    In a heating curve, when is the temperature constant?

    asked by priscilla
  304. Chemistry

    A sample of sucrose, C12H22O11(s),contains 0.16 mol of oxygen, atoms(O). a.) What amount in moles of sucrose is in the sample? b.)How many atoms of carbon are in the sample?

    asked by Lg
  305. math

    Considera compoound experment in which a nickel is flipped and then a quarter is flipped, need to know all the possible outcomes I came up with 4. correct? also need to know the probability of each possible outcome

    asked by jill
  306. math

    if less than half of the garden is planted with corn, then is it reasonable to estimate that 5/6 of the garden is planted with corn?

    asked by amy
  307. Chemistry

    The experimentally measured and generally accepted value for the molar volume of Na is about 23 cm3/mol. Which of the following best explains why the value calculated in Part B is significantly smaller than the measured values? Part B Answer 16.3 cm3/mol

    asked by Morgan
  308. physics

    A box of books weighing 314 N is shoved across the floor by a force of 475 N exerted downward at an angle of 35° below the horizontal. (a) If μk between the box and the floor is 0.53, how long does it take to move the box 5.00 m starting from rest? What

    asked by John Miller
  309. hist

    Can free labor compete with slave labor?

    asked by jennaa
  310. English

    1. He wants to eat some delicious foods. 2. He wants to eat some delicious food. (Which one is correct? are both OK?) 3. He speaks a little English. 4. He speaks English a little. (Are both grammatical?)

    asked by rfvv
  311. Please help me solve it. Math

    solve for the value of x: 6log (x^2+1)-x=0. please help me because I do not have any idea in this topic.

    asked by Jeconiah
  312. English

    1. This is the boy whom Mary likes. 2. This is the boy who Mary likes. 3. This is the boy Mary likes. (Are they all grammatical? When do we use Sentence 2?)

    asked by rfvv
  313. physics

    A 570-turn solenoid is 19cm long. The current in it is 32A . A 2.0cm -long straight wire cuts through the center of the solenoid, along a diameter. This wire carries a 27A current downward (and is connected by other wires that don't concern us). What is

    asked by bud
  314. physics

    A long horizontal wire carries a current of 48A . A second wire, made of 2.6mm diameter copper wire and parallel to the first, is kept in suspension magnetically 15cm below(Figure 1) . Determine the magnitude of the current in the lower wire.

    asked by bud
  315. algebra

    solve for x: x-18 =64

    asked by Anon
  316. chemistry

    A sample of solid sulfur is heated with an electrical coil. If 105 joules of energy is added to a 12.4 gram sample initially at 24.4°C, what is the final temperature of the sulfur?

    asked by sheila
  317. chemistry

    how do i predict a conjugate a base? Ex: HBr. The conjugate base is Br- a. NH4+ b. H2O c. H2PO4

    asked by K
  318. HISTORY

    how did the US support Diem's regime between 1954-1964?

    asked by sarah
  319. physics

    A truck of mass 8,000kg is traveling along a level road at an initial speed of 25m/s. The driver then shifts into neutral so that the truck is coasting, and the truck gradually slows to a final speed of 13m/s.

    asked by KAthryn
  320. physics

    A 20.0-m tall hollow aluminum flagpole is equivalent in strength to a solid cylinder 4.00 cm in diameter. A strong wind bends the pole much as a horizontal force of 900 N exerted at the top would. How far to the side does the top of the pole flex?

    asked by meme
  321. biology/ help please

    which part of a neuron in the cerebellum of the brain is the most extensive in terms of anatomical developement? a-hillock region b-cell body c-dendrites d-nucleus e-axon -my answer is axon

    asked by joy
  322. math

    I am a decimal number and when you multiply me by the number that is 10 times greater than me you get the answer 291.6

    asked by Liam
  323. math

    solve each system of equations by graphing y=-1/2x+5 y=3x-2

    asked by Alexius
  324. Math

    For each 10-degree adjustment on your water heater thermostat, you can reduce carbon dioxide emissions by 500 pounds a year. By how many pounds will you reduce your carbon dioxide footprint if you turn down your water heater thermostat from 140¢ªF to

    asked by Kristi
  325. Help! Algebra

    Find the common ratio r and the value of A1 with the information given. 1. A3=324 A7=64 2. A4=32/3 A8=54

    asked by Becca
  326. Geometry

    ABC is a triangle with circumcenter O , obtuse angle BAC and AB

    asked by Jacob
  327. physics

    A student, crazed by the first physics Midterm, uses a pushing force of 80 N angled at 70° to push a 5.0 kg book across the frictionless ceiling of his room. a. What is the block's acceleration? b. What is the force of the ceiling on the book?

    asked by Corey
  328. Algebra

    Two questions I need help with. Find the indicated partial sum using the information given. 1. a3=4/9, a7=9/64, S6 Determine wheater the infinite geometric series has a finite sum 2. 6+ 3+ 3/2 + 3/4 +.... 3. -49 + (-7) + (- 1/7) +...

    asked by Becca
  329. Chemistry

    A cell has a standard emf of +0.177 V at 298 K. What is the value of the equilibrium constant for the cell reaction a) if n=1? b) if n=2?

    asked by Summer
  330. Finding the midpoint

    Find the midpoint of the line segment joining the points P1 and P2 P1=(3,2) P2=(-5,7) The midpoint is=

    asked by Lauren
  331. Calculus

    Determine whether the planes are parallel or orthogonal. Equations given: 5x - 3y + z = 4 x + 4y + 7z = 1 How exactly do I solve this? It wasn't covered completely in class.

    asked by Krista
  332. Math

    Find the magnitude of the resultant vector of two 5-pound forces that act on an object with an angle of 70° between them.

    asked by Kyra
  333. chemistry

    200g of HOCl is placed inside a 3L container and allowed to reach equilibrium. Find the equilibrium concentrations for all species. Given: 2HOCL (g) H20 (g) + Cl20 (g) when Delta H = +56 kJ and Keq = 11.11 at 25 C

    asked by Anonymous
  334. Life orientation

    I need help on this question?to discuss 5 ways in which the human or envinmental problem impacts on the community that causes ill health

    asked by Constance
  335. Physics gravity

    A thin spherical shell has a radius of 2.4 m and a mass of 410 kg, and its center is located at the origin of a coordinate system. Another spherical shell with a radius of 1 m and mass 135 kg is inside the larger shell with its center at 0.6 m on the x

    asked by Chel
  336. math

    the world record for the men's long jump is 29 3/8 feet. the women's record for the same event is 24 88/48 feet. How many feet longer is the men's record?

    asked by lee
  337. AP Chemistry

    An unknown metal M forms a soluble compound, M(NO3)2. A solution of M(NO3)2 is electrolyzed. When a constant current of 2.5 amperes is applied for 35 minutes, 3.06 grams of the metal M is deposited. Calculate the molar mass of M and identify the metal.

    asked by Summer
  338. reading

    All of the following are goals of study reading EXCEPT: A. greater speed. B. retain information in your long-term memory. C. be an active reader. D. active reading

    asked by cody
  339. physics

    Three charges are at the corners of a rectangle with side L1 = 0.04 m and L2 = 0.015 m as shown. If q1 = 1.3 microCoulombs, q2 = 2.8 microCoulombs, and q3 = 3.3 microCoulombs, what is the magnitude of the force on q2

    asked by Anonymous
  340. physics

    An object is placed (a)6cm (b)20 from a thin convex lens of focal length 10cm.determine the nature,position and magnification of the image in each case.

    asked by Agu