Questions Asked on
March 14, 2015

  1. earth

    When earth is seen from outer space,it looks mainly blue. This is because most of the earth is covered with.

    asked by leslie
  2. chemistry

    Hey DrBoB222 I was wondering if you could help me with that problem just a little bit ago again?

    asked by jack
  3. Maths

    Suppose that the reliability of a HIV test is specified as follows: Of people having HIV, 90% of the test detect the disease but 10% go undetected. Of people free of HIV, 99% of the test are judged HIV–ive but 1% are diagnosed as showing HIV+ive. From a

    asked by Sam
  4. Philosophy

    Do you believe that humans have free will? Why or why not? Support your response with concrete examples.

    asked by TayB
  5. math

    Roughly sketch the region enclosed by the curves y = sin x, y = cos x and the x - axis between x = 0 and x = p/ 2 . Also find the area of this region.

    asked by usha
  6. Physics - Mechanics

    A bullet of mass m is shot at speed v toward a pendulum bob of mass M. The bullet penetrates through the block and emerges on the other side traveling at speed v/2. 1. What is the speed v_block of the block immediately after the bullet emerges from the

    asked by Anonymous
  7. Physics - Mechanics

    A large box of mass M is at rest on a horizontal table whose surface is rough; the coefficient of static friction between the table and the block is μ. The box is connected by a taut string to a small block of unknown mass m, initially held horizontally

    asked by Anonymous
  8. Physics - Mechanics

    A small block of mass 1.2 kg is launched by a compressed spring with force constant k=600 N/m. The initial compression of the spring is 0.15 m. The block slides along a horizontal frictionless surface and then up an inclined plane that makes an angle

    asked by Anonymous
  9. maths

    base perimeter of a triangular prism is 25 cm and its height is 40 cm .calculate its lateral surface area?

    asked by jinu
  10. physics

    a car is moving at speed of 50km/hr ,can be stopped by brake at least at 6 m.If the same car is moving at speed of 100 km/hr ,what is the minimum stopping distance?

    asked by priya
  11. physics

    A chair of mass 14.0kg is sitting on the horizontal floor; the floor is not frictionless. You push on the chair with a force F = 40.0N that is directed at an angle of 43.0∘ below the horizontal and the chair slides along the floor.

    asked by Kevin
  12. physics

    The density of copper is 8930 kg per cubic metre. A rod of copper is 20 cm long. What length of it will remain immersed in mercury of density 13600 kg per cubic metre

    asked by Suraj
  13. Physics

    Hi, can anybody provide some hints in how to approach these questions? I've been stuck on it for days!!! Thank you in advance!! Nodes of a Standing Wave: Consider a standing wave, where y represents the transverse displacement of a string that extends

    asked by Tommy
  14. math

    which pizza has the best value for the money; a 10 inch round pie for $6 or a 14 inch pie for $10? Support your answer.

    asked by Michelle
  15. physics

    A 130-kg crate is initially at rest on a horizontal frictionless surface. An applied force of 400 N to the right is exerted on the crate, causing it to move and cover a distance of 26.0 m. At the end of its path, the crate is found to be moving at a speed

    asked by jjjj
  16. SCIENCE(CHEMISTRY)

    calculate the mass of silver deposited when a current of 2.6a is passed through a solution of a silver salt for 70mins ag=108,1 faraday 96500

    asked by MIRACLE IWUNZE
  17. algebra2

    (x-5)^1/3 -4=-2

    asked by anonymous
  18. hct

    How many pints of a 7% cleaning solution must be mixed with 9 pints of a 15% cleaning solution to give a 13% solution?

    asked by lody
  19. Math

    Find the 10th term of a nonconstant arithmetic sequence whose 1st term is 3 with the 1st, 4th, and 13th term forming a geometric sequence. I've tried doing it differently everytime, but I always come to a dead end..

    asked by Anon
  20. Algebra

    This is for a project for Beginning Algebra at Great Bridge Middle School 8th grade class. Here's the questions: The number of companies offering cell phone service has grown rapidly in recent years. The plans they offer vary greatly and it can be

    asked by Connie
  21. Criminal Justice/Probation & Parole

    According to psychoanalytic theory: A. behavior is the result of operant conditioning. B. crime is the result of positive reinforcement. C. conscious behavior is the result of unconscious thought. D. all of the above I think it's C, but not sure.

    asked by Pat
  22. gabigabi secondary mathlit

    they leave kimberly on sunday morng and need to be in bloemfontain by 12:00 to get ready for their concert at 14:00 what is the letest time that they can leave kimberly .if the assume that their average speed when they travelling will be 90km/h

    asked by nonhle
  23. algebra2

    cuberoot(n+8)-6=-3

    asked by anonymous
  24. math

    3/5 of the people at a funfair were children. 3/4 of the remaining people were men. There were 140 more children than women. How many people went to the funfair?

    asked by jessi
  25. Corporate Finance

    Suppose you have been hired as a financial consultant to Defense Electronics, Inc. (DEI), a large, publicly traded firm that is the market share leader in radar detection systems (RDSs). The company is looking at setting up a manufacturing plant overseas

    asked by Student
  26. chemistry

    the wave length of the first line of the Lyman series of hydrogen is identical to the second line of the Balmer series for some hydrogen like ion 'X'.Identify the ion.

    asked by babai
  27. maths

    a cubical water tank is filled by tap water at the rate of 1.4liters per second. find the length of the tank in centimeters if the tank if completely filled in 28minutes

    asked by neevetha
  28. ENG1511

    Please rephrase this people's claims that they have friends with whom they share ideas and life experience.

    asked by Nondumiso
  29. Math

    Montreal's Marathon building is 395 m tall. From a point level with, and 148m from, the base of the building, what is the angle of elevation to the top of the building?

    asked by Rishabh
  30. math

    How would I solve this equation for x? 0=3.9657(0.9982^x)ln0.9982

    asked by Sara
  31. Chemistry help

    washing soda is a hydrate of sodium carbonate. a 2.714 g sample of washing soda is heated until a constant mass of 1.006 of na2co3 is reached. what is the mass of the water evaporated? what is the percent water in the compound?

    asked by Anonymous
  32. Chemistry help

    Write two molecular formulas that reduce to each to each of the given empirical formulas. Do not include the given empirical formulas. 1. Al2(SO4)3 . Cr(CN)3

    asked by Anonymous
  33. chemistry

    what are the islamic values in the experiment composition of potassium chlorate?I have to do lab report about the topic and the due date is around the corner.please help me..

    asked by student
  34. Criminal Justice/ Probation & Parole

    The advantage of selecting probation/parole officers on the basis of a written examination is that: A. it produces the candidates who will be the best probation/parole officers. B. it provides the hiring agency with the greatest amount of flexibility. C.

    asked by Pat
  35. math, scale drawing

    charlies swimming pool is rectangular. it has an area of 120ft2. charlie drew a scale drawing of the pool using the scale 3/2 centimeters= 2 feet. what was the area of the scale drawing?

    asked by Farvah
  36. life orientation

    four kinds of fraud the student who receive and repay nsfas should guard against commiting?

    asked by pressure
  37. science

    The passageway that takes air from your throat to your lungs is called the pharynx*** larynx alveoli trachea

    asked by Anonymous
  38. math

    A point (-5, 4) is mapped onto (-1, -1) by a translation. Find the image of (-4, 5) under the same translation.

    asked by kudu
  39. math

    Two towns P and Q are 400 km apart. A bus left for P and Q. It stopped at Q for one hour and then started the return to P. one hour after the departure of the bus from P, a trail also heading for Q left P. the trailer met the returning bus ¾ of the way

    asked by kudu
  40. Chemistry

    Suppose 0.500 g of sulfur combines with 1.00 g of copper. What is the empirical formula of the compound? The atomic mass of sulfur is 32.065 g and the atomic mass of copper is 63.546 g.

    asked by Catherine
  41. Chemistry

    Describe the procedure to prepare this solution: 100 mL of a solution 0.1 M of KMnO4 Help? I don't understand what this implies.

    asked by Amy
  42. Chemistry

    Given that 12.25 g of aluminum sulfide is reacted with excess water. How many grams of aluminum hydroxide can be obtained? The molar mass of aluminum sulfide is 150.0 g and the molar mass of aluminum hydroxide is 78.0 g.

    asked by Catherine
  43. math

    Two points P and Q have coordinates (-2, 3) and (1, 3) respectively. A translation map point P to P’ (10, 10) (a) Find the coordinates of Q’ the image of Q under the translation (b) The position vector of P and Q in (a) above are p and q respectively

    asked by kudu
  44. math

    P (5,) and Q (-1, 2) are points on a straight line. Find the equation of the perpendicular bisector of PQ: y = mx+c how to find missing

    asked by kudu
  45. English

    For a paragraph about the Midwest can culture, language, manners go into one paragraph?

    asked by m
  46. Math

    Hi! I wanted to know how you would sketch the graph of this system of inequalities. Math problem: 2x2 + y ≥ 2 x ≤ 2 y ≤ 1

    asked by Heather
  47. Finance

    A firm's bond's have a maturity of 10 years with a $1,000 face value, an 8 percent semiannual coupon, are callable in 5 years at $1,050, and currently sell at a price of $1,100. What are their yield to maturity and their yield to call? What return should

    asked by Hk
  48. statistics

    A credit card company estimates that the average credit card balance of Americans is $3,210. A statistics student wants to know whether this is true for citizens of her home town. Which hypothesis test would be most appropriate for addressing this

    asked by madi
  49. Vectors

    Does the point of intersection between L1:(4,9,2)+s(1,-1,-1), seR and Ls: (2,11,4)+t(5,-3,-4), teR lie on the plane 3x-2y+3z+4=0?

    asked by Sara
  50. science

    3.A weather station is located 300 miles directly east of a second station. Winds at the eastern station are blowing from the south. Winds at the western station are blowing from the north. What is true about the weather system near these two locations? A.

    asked by Angelina
  51. Vectors

    Explain why the planes 3x-6y-9z+5=0 and x+2=2y+3z never intersect

    asked by Sara
  52. Education/College level

    Using the NETS for teachers Standard 1. b. Facilitate and inspire student learning and creativity. b. Engage students in exploring real-word issues and solving authentic problems using digital tools and resources. Using this standard I have to: create a

    asked by Cathy
  53. Calculus

    Find an equation of a line tangent to y = 2sin x whose slope is a maximum value in the interval (0, 2π] I believe the equation is y=2x-4pi. How is the b-value -4pi?

    asked by Sara
  54. finance

    You want to have $2 million in real dollars in an account when you retire in 30 years. The nominal return on your investment is 8 percent and the inflation rate is 5.3 percent. What real amount must you deposit each year to achieve your goal? (Do not round

    asked by jake
  55. algebra

    you research the cost of a gallon of gasoline over several years to look for trends the table shows the data you have collected what is the equation of the line of best fit how much would you expect to pay for gasoline in 2029 a)y=0.538x+1.36; $33.10 b)

    asked by matt
  56. Physics

    A 1.42 kg ball is connected by means of two massless strings, each of length L = 1.29 m, to a vertical, rotating rod. The strings are tied to the rod with separation d = 1.29 m and are taut. The tension in the upper string is 48.0 N. What are (a) the

    asked by Brian
  57. Managerial Accounting

    Joanna Pauly was delighted to see that her ROI figures had increased for the third straight year. She was sure that her campaign to lower costs and use machinery more efficiently (en- abling her factories to sell several older machines) was the reason

    asked by mary
  58. Chemistry

    What is the cause of hexagonal structure ?

    asked by Ciaria
  59. Science

    fus = 12.5 and vap = 93.2 both j/k x mol Determine the entropy change when 7.30 mol of HCL(g) condenses at atmospheric pressure. my first answer was -91.3 but it keeps telling me that is incorrect and that delta Svap if scaled at 1.00 mol but needs to be

    asked by Talaya
  60. english

    Researchers are LEAST likely to want to know which of the following from their sources?

    asked by marcus
  61. teacher aide

    lesson - 02604500 - helping abused children

    asked by maggie
  62. psychology

    which of the following has been demonstrated by research as a skill or ability that is induced via meditation? A) ability to raise metabolism B) ability to cure bacterial infections withou medication C) ability to lower body temperature D) ability to

    asked by Carol
  63. Chemistry

    How many millilitres of a 0.1 M solution of NaF and of 0.1 M solution of HF must be mixed to obtain 1L of buffer at pH = 4? Ka = 6.7 × 10-4 Currently I am quite confident with using the henderson and Hasselbalch equation but this question has left me

    asked by James Wilson
  64. Statistics

    How many different ways can you put 3 distinguishable things in 10 boxes?

    asked by Bob
  65. math

    How would I write the equation y=3.9657(0.9982^x) in the format of g(x)=f(x)+f(x-60)?

    asked by Sara
  66. Pre.Calc

    You want to make an investment in a continuously compounding account over a period of ten years. What interest rate is required for your investment to double in that time period? Round the logarithm value to the nearest hundredth and the answer to the

    asked by Julissa
  67. Calculus

    The limit as x approaches 4 ((-3x+1)/(x-4)^2) is A. -11 B. -13 C. Infinity D. Negative infinity E. DNE

    asked by Anonymous
  68. H Chemistry

    if 1.01x103 ml of h2o gas at stp is compressed into o.345ml container what would the new pressuer be

    asked by angie
  69. reading help

    Vocbulary Words: Assist Assume Bluntly Commission Competitors Disapprove Earnings Exasperated Extinguished Humiliating Patron Percentage Personnel Rectify Regardless Worthwhile Use each clue to write a vocabulary word. a. not disadvantageous but, b. not

    asked by John Dosley
  70. math

    nine friends each get 1 half of a candybar. How many bars are there? show your work.

    asked by rauline
  71. Math

    1. Solve: log (y-1) = -log(y-9) 2. Find the inverse of the logarithmic function f defined by f(y)= 2log5 (2y-8)+3.

    asked by Lily
  72. Spanish

    Sabemos que Juan A. estudió matemáticas. B. estudió arte. C. estudió literatura española.

    asked by Ciaria
  73. Calculus check

    If f(x)=sin^2(3-x) then f'(0)= A. -2cos3 B. -2sin3cos3 C. 6cos3 D. 2sin3cos3 E. 6sin3cos3 I got B

    asked by Sarah
  74. coding

    Anesthesia services for closed treatment of fracture of humerus; patient is 85 years old, but healthy. Provide the code(s) and the physical status modifier.

    asked by kory
  75. spanish

    Cuando el empleado del hotel es atento y cortés es bueno darle _____. A. un ascensor B. una llave C. una propina D. un itinerario

    asked by Ciaria
  76. Calculus check

    y=-1/sqrt(x^2+1) , then dy/dx= A. x/(x^2+1)^1/2 B. x/(x^2+1)^1/2 C. -x/(x^2+1)^1/2 D. -x/(x^2+1)^3/2 E. x/(x^2+1) I got B.

    asked by Sarah
  77. spanish

    Si vas al mar, vas a disfrutar del _____ y de _____.

    asked by Ciaria
  78. Calculus check revised.

    y=-1/sqrt(x^2+1) , then dy/dx= A. x/(x^2+1)^1/2 B. x/(x^2+1)^3/2 C. -x/(x^2+1)^1/2 D. -x/(x^2+1)^3/2 E. x/(x^2+1) I got B.

    asked by Sarah
  79. Chemistry

    Oil and water don't mix. We say that oil is

    asked by Kris
  80. Spanish

    Es mejor que Uds. _____ en la excursión hoy porque mañana no hay suficiente tiempo. A. vayan B. van C. va D. vaya

    asked by Ciaria
  81. Pre-Calc.

    Change the exponential statement 5^x=125 into an equivalent logarithmic statement. I know the answer is log5(125)=(x) Just don't know the steps to get it.

    asked by Julissa
  82. Geom

    I have a 25cm wheel across how many rotations to go 100000 kilometers

    asked by Jim
  83. spanish

    Si necesitas dinero en efectivo, hay _____ en muchos lugares en la excursión. A. quioscos B. artesanías C. cajeros automáticos D. vendedores

    asked by Ciaria
  84. Pre-Calculus

    How many parameters in a quadratic function in a vertex form change when you change the location of the vertex? ( P and Q change? The value of the coefficient( a ) may also change?)

    asked by Lucina
  85. Spanish

    Hello how do I say "my future house" in spanish. I didn't want to use google translate because of the grammar.

    asked by kevin
  86. Calculus

    If y=3/(sinx+cosx) , find dy/dx A. 3sinx-3cosx B. 3/(sinx+cosx)^2 C. -3/(sinx+cosx)^2 D. 3(cosx-sinx)/(sinx+cosx)^2 E. 3(sinx-cosx)/(1+2sinxcosx)

    asked by Anonymous
  87. spanish

    Hicimos _____ a una catedral histórica en Madrid. A. un quiosco B. una gira C. un ruido D. una propina

    asked by Ciaria
  88. math

    . If a fowl is treated, probability of dying is 1/10 while if not treated the probability is 7/10 calculate the probability that, a fowl picked at random from the 36 fowl is (i) Treated with the drug and will die (ii) Not treated with the drug and will die

    asked by kudu
  89. Calculus

    f(x)=x^n , where n is a positive integer greater or equal to 2. The graph of f(x) will have an inflection point when n is A. Even B. Odd C. Divisible by 3 D. For all values E. For no values

    asked by Anonymous
  90. business maths

    For an investment to double in value during a 12-year period, a. What annually compounded rate of return must it earn? (Round your answer to two decimal places.) Annually compounded rate of return % b. What monthly compounded rate of return must it earn?

    asked by bajwa
  91. math

    Please explain question. How many tons are in 1/2 of a ton.

    asked by Milan
  92. Calculus

    In the next questions, a particle is moving along a horizontal line according to the formula: s=2t^4-4t^3+2t^2-1 a) the particle is moving right when A. 0 is less than t is less than 1/2 B. t is greater than 0 C. t is greater than 1 D. 0 is less than t is

    asked by Anonymous
  93. math

    Please explain this. How many tons are in 1/2 of a whole ton.

    asked by Milan
  94. Calculus check

    The integral of (x^2-4secxtanx) dx= I got x^3/3-4secx+c

    asked by Sarah
  95. Calculus 2

    ∫ tan^2 (x) sec^4 (x) dx ∫ [tan^2 (t) + tan^4 (t)] dt ∫ [1-tan^2 (x)] / [sec^2 (x)] dx Trigonometric integral Please show steps so I can understand!

    asked by Janice
  96. Calc

    ∫ (2x+1)/(x+1) dx Please show steps if you work it. I think it's a partial fraction and worked with decomposition. Not sure though.

    asked by Janice
  97. Calculus

    ∫ x^3 √(16-x^2) dx evaluated between [0, 4] I know this is solved using trigonometric substitution, but I'm not sure how to work it. Please show steps so I will understand.

    asked by Nick
  98. calculus trig substitution

    ∫ x^3 √(x^2+9) dx If you work it can you write the steps? I really don't like the way my teacher teaches it. Someone else doing it might help.

    asked by Allie
  99. Fiance

    If you take out an $8,400 car loan that calls for 36 monthly payments starting after 1 month at an APR of 9%, what is your monthly payment?

    asked by Libby
  100. Math

    Q. Pete wants to buy a stack of clothing that totals $200. The sales tax is 6% if you add tax to his total bill, what is Pete's grand total? A. Do I * 200 * 6 ?

    asked by Destinee
  101. math

    Please answer and explain how you received this answer. A cargo van is carrying 20 identical steel cylinders. Each cylinder contains compressed oxygen. Altogether, the cylinders weigh one half of a ton. In tons, what is the weight of each cylinder?

    asked by nicey
  102. Calculus

    The normal (perpendicular) line to the curve y=sqrt(8-x^2) at (-2,2) has slope A. -2 B. 1/2 C. -1/2 D. 1 E. -1 I got A

    asked by Sarah
  103. Calculus check

    If f(5)=3 and f'(5)=-2, find the derivative of x^2f(x) at x=5. A. 0 B. -18 C. -12 D. -20 E. -80 I got D

    asked by Sarah
  104. Calculus

    The circumference of a circle is increasing at a rate of 2pi/5 inches per minute. When the radius is 5 inches, how fast is the area of the circle increasing in square inches per minute? A. 1/5 B. pi/5 C. 2 D. 2pi E. 25pi

    asked by Anonymous
  105. Physics

    1. What is the kinetic energy of a 0.50 g insect traveling in a straight line at 5.0m/s? a. 6.25j b. 1.25j c. 5.0j d. 250j Is the answer A?? 2. Mechanical energy is defined as the sum of which of the following? a. kinetic, potential and radiant energy b.

    asked by N.
  106. spanish

    Si quieres trabajar en un laboratorio químico, serás _____. A. arquitecto B. científico C. mecánico D. veterinario

    asked by Ciaria
  107. spanish

    Como me gusta estar al aire libre y hacer ejercicio, creo que me gustaría seguir una carrera como _____. A. científico de laboratorio B. abogado C. cartero D. juez

    asked by Ciaria
  108. Physics

    Assuming atmospheric pressure to be 1.01 x 10^5 Pa and the density of sea water to be 1025 kg/m^3, what is the absolute pressure at a depth of 15.0m below the surface of the ocean? Could you show me how to do this problem? Thank you.

    asked by N.
  109. PreCalculus

    I tried to do these questions, however I can't seem to get the answer. Can someone help me? I would really appreciate it. _____________________________________ Mathematical Induction Prove that the statement in true for every positive integer n. 1. 1/1*2*3

    asked by Anonymous
  110. Spanish

    Algún día tendrás que _____. A. seguir una carrera B. ganarte la vida C. graduarte del colegio D. All of the above A or D ?

    asked by Ciaria
  111. Spanish

    Creo que después de terminar el programa de estudios en computación, yo _____ todo lo que necesito para seguir esa carrera. A. supe B. sabía C. sé D. sabré B or d ?

    asked by Ciaria
  112. Calculus

    A function f(x) is continuous for all x and has a local minimum at (1,8). Which must be true? A. f'(1)=0 B. f' exists at x=1 C. The graph is concave up at x=1 D. f'(x) is less than 0 if x is less than 1, f'(x) is greater than 0 if x is greater than 1 E.

    asked by Anonymous
  113. college algebra

    How much should be deposited in an account paying 3.5% interest, compounded quarterly, in order to have a balance of $ 6,000after 17years and 3months?

    asked by James
  114. English Grammar

    Please Help Check My Answers. 1. *****A. "The leaves," she explained, "can be anywhere from two to eight inches long." B. Nan said, "It can also have dark or light green leaves". C. "Also," she added. "the leaves' edges can be smooth or wavy." D. "It can

    asked by Anonymous
  115. biology

    Hi, This is a question on my biology test review that I don't understand. I think the answer is pine trees, but I'm not really sure. Please help! In a barren terrestrial habitat, which of the following would be an example of a pioneer organism? moss pine

    asked by Kaden
  116. algebra

    you research the cost of a gallon of gasoline over several years to look for trends the table shows the data you have collected what is the equation of the line of best fit how much would you expect to pay for gasoline in 2029 a)y=0.538x+1.36; $33.10 b)

    asked by matt
  117. Calculus

    if f'(x)=2(3x+5)^4 , then the fifth derivative of f(x) at x=-5/3 is A. 0 B. 144 C. 1,296 D. 3,888 E. 7,776 I got A

    asked by Sarah
  118. Algebra

    1. Solve: log (y-1) = -log(y-9) 2. Find the inverse of the logarithmic function f defined by f(y)= 2log5 (2y-8)+3.

    asked by Lily
  119. Calculus

    For how many values of x will the tangent lines to y=4sinx and y=x^2/2 be parallel? A. 0 B. 1 C. 3 D. 4 E. Infinite

    asked by Anonymous
  120. Calculus check

    Given f(x)=4+3/x find all values of c in the interval (1,3) that satisfy the mean value theorem. A. 2 B. Sqrt(2) C. Sqrt(3) D. +or- sqrt(3) E. MVT doesn't apply I got C

    asked by Sarah
  121. physics

    when 200 grams of aluminum at 100 degrees celsius is dropped into an aluminum calorimeter of mass 120 grams and containing 150 grams of kerosene at 15 degrees celsius,the mixtures reaches a temperature of 50 degrees celsius.what is the specific heat of

    asked by john ralph
  122. math

    If cos 3 theta=sin 30 find the value of theta without using a calculator Is theta = sin 30/ cos 3 = 10

    asked by Jenette