Questions Asked on
September 21, 2013

  1. Math

    Write an equation for the line of the given point and perpendicular to the given line. Please help (5,-4);2x+9y=4

    asked by Pam
  2. history

    why im optimistic about our nations future can you help me i need to write a essay about this paragraph

    asked by juan
  3. Math

    What's the equation of the line containing the given point and perpendicular to the given line. (5,-3);6x+5y=7 Also (4,5);6x+y=4. In the forms of y=mx+b Thank you for your help.

    asked by Pam
  4. English

    1. Pour yourself another cup of tea. 2. Pour another cup of tea. (Are both grammatical? What is the function of 'yourself' in Sentence 1?)

    asked by rfvv
  5. Math (College Level Mathematics)

    Fourier cosine series correspondence for f(x)= x, o < x < pie given by x ~ pie / 2 - 4/n, E infinity on top and n=1 on bottom. cos (an-1)/x / (2n-1)squared, (0 < x < Pie). Explain why this correspondence is actually an equality for 0 is less than or equal

    asked by Joy
  6. Math (College Level Mathematics)

    Fourier sin series for f(x) = 1, 0 < x < Pie is given by 1 = 4/n E 1/ (2n-1) times sin (2n-1) x, (0 < x < n). Using this, find the Fourier sinc series for f(x)= 1, on 0 < x < c where c > 0. Then find the Fourier series for g(x), x > 0 where g(x) = 1, 0 < x

    asked by Joy
  7. Math

    An elevator moves at a rate of -5.8 feet per second from a height of 300 feet above the ground. It takes 3 seconds for the elevator to make its first stop. How many feet above the ground is the elevator now?

    asked by Alicia
  8. a

    can someone help me with steps 0>x^2 +5x-2

    asked by Alaska Diamond
  9. algebra

    I need to find the first five terms in the arithmetic sequence in an =(2)^n-1 n=1 I don't know now to type the n's smaller.

    asked by Alaska Diamond
  10. algebra

    I have to find the solution for (fg)(x) f(x)= -6x-1 g(x)=4x^2 can you show steps please

    asked by Alaska Diamond
  11. algebra

    A parallelogram is 22 inches long and 14 inches wide. How do you find the height of the parallelogram? How do you find the area of the parallelogram ?

    asked by Betty
  12. college physics

    (a) Two protons in a molecule are 3.80 multiplied by 10-10 m apart. Find the electrical force exerted by one proton on the other. Magnitude N (b) State how the magnitude of this force compares with the magnitude of the gravitational force exerted by one

    asked by vishal
  13. college physics

    In the Bohr theory of the hydrogen atom, an electron moves in a circular orbit about a proton, where the radius of the orbit is approximately 0.542 multiplied by 10-10 m. (The actual value is 0.529 multiplied by 10-10 m.) (a) Find the electric force

    asked by vishal
  14. college physics

    A rod 14.0 cm long is uniformly charged and has a total charge of -20.0 µC. Determine the magnitude and direction of the electric field along the axis of the rod at a point 36.0 cm from its center. N/C

    asked by vishal
  15. Chemistry

    A sample of glucose, C6H12O6, contains 5.1x10623. a.)How many atoms of hydrogen does it contain? b.)How many molecules of glucose does it contain? please help me. :(

    asked by Rad
  16. Chemistry

    A sample of glucose, C6H12O6, contains 5.1x10623. a.)How many atoms of hydrogen does it contain? b.)How many molecules of glucose does it contain? please help me. :(

    asked by Rad
  17. Bus/475

    why should core values remain relatively constant.

    asked by Anita
  18. triangles (math)

    BO and CO are respectively the bisector of angle b and angle c triangle ABC.AO produced meets BC at P, then find AB/AC.

    asked by help(in much need)!!!!!!!!!!!!!!!!!!!!
  19. ENGLISH (ESL)

    please need proof Reading Health promotion means what you can do to reduce the health risks and promote the wellness of a human being. This process directed towards enabling people to take action and support them in changing their lifestyle to move toward

    asked by shan
  20. math

    Order: Furosemide 40mg IV push every 12 hours x 3 days. have 50 mg dont clue how to do this .

    asked by Anonymous
  21. polynomials

    can someone please help me with this problem I have to get the sum diff and product I keep trying to work it out but i really think im blowing it. x^3- ¡¼2x¡½^2 + 3x-1 ¡Ã x^2- x+4

    asked by Rick
  22. polynomials help me please

    Im sorry here is the problem rewritten X^3 -2x^3 + 3x-1 : X^2-x+4 I have to get the sum diff and product and it kicking my tail i think i keep doing it wrong can someone please help me

    asked by Rick
  23. math

    The variable n represents a whole number. a. For what values of n will the sum of n+3 be less than 50? b. For what values of n will the product 3n be less than 50?

    asked by Shohanur
  24. Chemistry stoch1

    Calculate mass of iron, which will be converted into (Fe3O4) by the action of 18g of steam on it.

    asked by Aman
  25. Chemistry

    A sample of 2.08 grams of Z is dissolved into 500 grams of water which is in a styrofoam coffee cup. The temperature is monitored and is found to rise from 25.682◦C to 25.899◦C. What is ∆Hsolution for substance Z? Assume no heat is lost/gained by

    asked by John
  26. leadership

    An important factor of being judged a best company to work for is the input provided by company employess.

    asked by rachel
  27. statistics

    if a toaster ovens hav an average life expectancy of 9.5 years with a standard deviation of 4.75 years. what is the probability that a toaster oven will last twenty years or will fail in one year or less?

    asked by efe
  28. Algebra Answer Check

    What is the simplified form of the following expression? 7m^2 + 6.5n - 4n + 2.5m^2 - n a. 9.5m^2 + 1.5n (?) b. 4.5m^2 + 1.5n c. 1.5m^2 - 4.2n d. 9.5m^2 - 1.5n Simplify the following expression. 1/3(21m + 27) a. 7m + 27 b. 7m + 9 (?) c. 63m + 9 d. 7m + 81

    asked by Anonymous
  29. Englsih

    Please edit this writing. There are several errors in this writing. People take out oil from the sands in AB so we can drive and leave tailings ponds. This caused a lot of damage to the land and negative impacts to wildlife. Natives get sick from eating

    asked by Dory
  30. English

    Please edit this writing. There are several errors. Also, evaluate the writing, style, spelling and content of this writing piece. The Alberta oil sands are being developed at an unprecedented rate for oil extraction. Consequently there is a great deal of

    asked by Jarry
  31. Algebra Answer Check

    Which property is illustrated by the following statement? 2x(6) = (6)2x a. Associative Property of Addition b. Commutative Property of Multiplication (?) c. Inverse Property of Multiplication d. Commutative Property of Addition Which property is

    asked by Anonymous
  32. English

    Please evaluate the writing, grammar, style, spelling as well as content. People take out oil from the sands in AB so we can drive and leave tailings ponds. This caused a lot of damage to the land and negative impacts to wildlife. Natives get sick from

    asked by Sandy
  33. statistics

    if anxiety scores were recorded as Z score or 1.10, is that higher than 35 in the current study?

    asked by efe
  34. math

    If f (x,y)= x-y+3, What is f (f (6,4), 2)? A. 12 B. 11 C. 6 D. 3 E. 2

    asked by fran
  35. Chemistry

    What is the energy of a bond formed between a potassium (K+) cation and an iodide (I−) anion? The ionic radii of K+ and I−, are 152 pm and 206 pm, respectively. Assume the Born exponent n is 10

    asked by ss01
  36. Chemistry

    Calculate the cohesive energy of potassium iodide (KI). The ionic radii of K+ and I−, are 152 pm and 206 pm, respectively. Assume the Born exponent n is 10. Assume a Madelung constant of 1.7.

    asked by ss01
  37. Math

    In a certain Library, there are r bookcases with s shelves in each book case. If a total of b books is to be distributed among the shelves, What is the number of books per shelf? a) b/rs b) rb/s c) rsb d) r/s-b e) b/s-r

    asked by David
  38. Statistics

    2. A researcher hypothesized that the pulse rates of long-distance athletes differ from those of other athletes. He believed that the runners’ pulses would be slower. He obtained a random sample of 10 long-distance runners. He measured their resting

    asked by Carol
  39. Algebra

    Two cyclists leave towns apart at the same time and travel toward each other. One cyclist travels slower than the other. If they meet in hours, what is the rate of each cyclist?

    asked by Mackenzie
  40. Algebra Answer Check

    What is the algebraic expression for the following word phrase: the quotient of 6 and the sum of 5 and y? 6 a. ----- 5-y 6 b. ----- (?) 5+y c. 6(5+y) d. 6/5 + 6y What is the algebraic expression for the following word phrase: the quotient of j and 8? a.

    asked by Anonymous
  41. math

    The average of 20,70 and x is 40. If the average of 20,70, x and y is 50, then y= a. 30 b. 60 c. 70 d. 80 e. 100

    asked by Carl
  42. Physics

    A runner is jogging at a steady 2.7 km/hr. When the runner is 7.7 km from the finish line, a bird begins flying from the runner to the finish line at 5.4 km/hr (2 times as fast as the runner). When the bird reaches the finish line, it turns around and

    asked by Theresa
  43. Math

    A 10-foot fence was set 2 5/6 feet into the ground. What is the exact length of the fence above ground?

    asked by Anonymous
  44. math

    in triangle ABC, AB=6, BC=12 AND AC=X. Which of the following cannot be a value of x? a. 6 b.7 c.8 d.9 e.10

    asked by Carl
  45. Chemistry.........

    Elemental chlorine exists as a diatomic molecule Cl2. Chlorine atoms exist in two different isotopes 35Cl and 37Cl. In the mass spectrum of chlorine molecules, how may peaks due to chlorine atoms would be observed? 2 how many different peaks due to the

    asked by Anonymous
  46. chemistry

    Butane gas, C4H10(g), is commonly used as a fuel in barbeque gas cylinders. Write a balanced chemical equation for the combustion of butane gas

    asked by jeannet
  47. body system

    a 63 year old man has become progressively hard of hearing. hes a retired airplane maechanic. what kind of hearing loss is this man most likely to have

    asked by Anonymous
  48. Accounting 1

    The total revenue of the month of June amounted to $6,500; total expenses amounted to $3,500; and withdrawals amounted to $600. The net income for the month amounted to $6,000. $2,400. $3,000. $3,500.

    asked by Tee
  49. math

    A researcher was interested in the emotional effects of music on exam performance. Before their exam, a professor took one group of students into a room in which calming music was played. A different group of students were taken to another room in which

    asked by Rachael
  50. Math

    Which sum or difference is equivalent to the following expression? 5-3x --- 5 Is this 1 - 3x/5?

    asked by Anonymous
  51. Business Math

    What is the maturity date of Samantha Best’s loan?

    asked by Anonymous
  52. Algebra

    The perimeter of a basketball court is 108 meters and the length is 6 meters longer than twice the width. what are the length and the width?

    asked by John
  53. business math

    What is the maturity value of the following loan? Use MV = P(1 + RT) to find the maturity. Principal Rate (%) Time Maturity Value $120,740 11¾ % 7 months (Points : 3)

    asked by Badgirl444
  54. physics

    The initial speed of a cannonball is 520 m/s. The acceleration of gravity is 9.8 m/s 2 . The cannon and target are at the same elevation. If the ball is to strike a target that is at a horizontal distance of 2.7 km from the cannon, what is the minimum time

    asked by Anonymous
  55. Physics

    You are given three vectors. A = 45.6 at θ1 = 51.2° above the +x axis, B = 23.6 at θ2 = 32.8° above the −x axis, and C = 34.0 along the −y axis. Determine A - B + C (magnitude and angle from the positive x axis).

    asked by Craig Thompson
  56. Math - Finance

    Product A This product will take 2 years to develop, at a cost of $100,000 in the first year (Yr 0) and $50,000 in the second. Revenue (benefits) in subsequent years is expected to be $100,000 per year. Product B This product will only take a year (Yr 0)

    asked by gboy- Help please
  57. Physics

    You are given three vectors. A = 45.6 at θ1 = 51.2° above the +x axis, B = 23.6 at θ2 = 32.8° above the −x axis, and C = 34.0 along the −y axis. Determine A - B + C (magnitude and angle from the positive x axis).

    asked by Craig Thompson
  58. Physics

    You are given three vectors. A = 45.6 at θ1 = 51.2° above the +x axis, B = 23.6 at θ2 = 32.8° above the −x axis, and C = 34.0 along the −y axis. Determine A - B + C (magnitude and angle from the positive x axis).

    asked by Craig Thompson
  59. physics

    A dynamite blast at a quarry launches a chunk of rock straight upward, and 2.3 s later it is rising at a speed of 18 m/s. Assuming air resistance has no effect on the rock, calculate its speed at (a) at launch and (b) 5.4 s after the launch.

    asked by girl
  60. Algebra

    Which property is illustrated by the following statement? (7p)mn = 7p(mn) a. Commutative Property of Multiplication b. Associative Property of Multiplication(?) c. Inverse Property of Multiplication d. Commutative Property of Addition What is the

    asked by Anonymous
  61. algebra

    Thank for the answer to the problem: the perimeter of a basketball court is 108 meters and length is 6 mters longer than twice the width. You gave me the width, but not the length. What is the length?

    asked by John
  62. Algebra

    Two cyclists leave towns apart at the same time and travel toward each other. One cyclist travels slower than the other. If they meet in hours, what is the rate of each cyclist?

    asked by Mackenzie
  63. business maths

    according to business week magazine,in 2003 there were 3.8 million millionaire-up 15% from 2002.how many million millionaire were there in 2002?round to nearest tenth.

    asked by Anonymous
  64. Chemistry

    An unknown compound contains only C, H, and O. Combustion of 4.50 g of this compound produced 10.2 g of CO2 and 4.19 g of H2O. What is this empirical formula of the unknown compound?

    asked by Casey
  65. Chemistry

    What is the maximum mass of S8 that can be produced by combining 85.0 g of each reactant? 8SO2 + 16H2S yields 3S8 +16H2O

    asked by James
  66. Math

    Is this statement true? The least squares regression line is a unique line for each data set? I would say yes.

    asked by John
  67. Math

    Using the formula r = d/t, where d is the distance in miles, r is the rate, and t is the time in hours, at which rate must you travel to cover 212.5 miles in 2.5 hours? a- 71 mph b- 106 mph c- 150 mph d- 85 mph ? What is the simplified form of the

    asked by Anonymous
  68. math

    How do you simplify (x^10) - 1 / (x - 1)?

    asked by Renae
  69. Biology

    Enantiomers, like L-alanine and D-alanine, are so similar that ribosomes will incorporate either one into a protein during synthesis. True or False?

    asked by Liam
  70. Math

    Please, help me with this problem. 200=-25p

    asked by Anonymous
  71. math

    a local summer baseball team plays 20 games each season. so far, they have won 9 games and lost 2. how many more games must they play win this season to win at least 75% of all their games?

    asked by kris
  72. chem

    Assume that you have 1.41mol of H2 and 3.50mol of N2. How many grams of ammonia (NH3) can you make, and how many grams of which reactant will be left over? 3H2+N2→2NH3

    asked by sue
  73. math

    3+2(1+X)>4

    asked by kpop
  74. math

    6-13y

    asked by Maisie
  75. Early Childhood Education

    A needs and services plan is a. written by a pediatrician b. only for infants and toddlers with special needs c.a plan discussed by parents and caregivers upon entry into an infant-toddler program d. a formal plan to serve children that is made by the

    asked by Sasha
  76. chemistry

    A particle with the mass of a proton is trapped in a box. The particle falls from the n=3 state to the n=2 state and emits 0.16 meV of energy. What is the size of the box? Please report your answer in nm.

    asked by sam
  77. Surveying

    I am looking for horizontal distance between 2 points. My slope distance is 153.97' and a vertical distance of 91degrees 32minutes 45seconds.

    asked by Dean
  78. Algebra

    Two cyclists leave towns apart at the same time and travel toward each other. One cyclist travels slower than the other. If they meet in hours, what is the rate of each cyclist?

    asked by Mackenzie
  79. Early Childhood Education

    Which of the following should not account for rapid gain in overall brain size after birth. a. number of neurons b.swelling due to rapid muscle growth c. The growth of dendrite trees d. myelinization I chose answer a.

    asked by Sasha
  80. Physics

    Bob rides his bicycle on a bike path that is 75 kilometers long to get to his house that is due east of the bike path. If it takes Bob 15 hours then what is his velocity?

    asked by TJ
  81. physics

    A curving freeway exit has a radius of 50.5m m and a posted speed limit of 35 mi/h \rm mi/h. What is the radical acceleration (in m/s^2) if you take the exit as posted speed express answer to two significant figures and appropriate units. Thanks for any

    asked by deb
  82. MATH

    what is the value of any power with exponent zero?

    asked by Anonymous
  83. Math-Geometry

    Angle AOB=x+3, Angle AOC=2x+11, Angle BOC=4x-7. Solve for x.

    asked by Christa
  84. science

    A particle with the mass of a proton is trapped in a box. The particle falls from the n=3 state to the n=2 state and emits 0.16 meV of energy. What is the size of the box? Please report your answer in nm.

    asked by Urgent please
  85. Science

    Family Smith is interested in buying a solar energy system. After some search on internet they have found two different systems that they are considering. System A is a PV system based on multicrystalline silicon solar cells and System B is a PV system

    asked by Anonymous
  86. Math-Algebra

    The table shows the amount earned for washing cars. How much is earned for washing 25 cars? 3 cars=$13.50, 6 cars=$27, 9 cars=$40.50, and 12 cars=$54

    asked by Christa
  87. Physics

    I need help. Resistor 1: Watts=? Current=? Resistance=520 Volts=? Resistor 2: Watts=? Current=? Resistance=? Volts=57.5 Resistor 3: Watts=? Current=? Resistance=1200 Volts=? Total: Watts=? Current=? Resistance=? Volts=280 Find Resistor 2's resistance.

    asked by Anonymous
  88. Chemistry

    A1g sample of enriched water, a mixture of H2O AND D2O, reacted completely with Cl2 to give a mixture of HCl and DCl. The HCl and DCl were then dissolved in pure H2O to make a 1.00 L solution. A 25.00 mL, sample of the 1 L solution was reacted with excess

    asked by Anirudh
  89. geometry

    two angles, a and b are complementary if the sum of their measure is 90 degrees. If angle a is 21 degrees more than twice angle b find the measures of angles a and b. I would like to know how to set this equation up in order to find the answer.

    asked by Chrissy
  90. Subtracting fractions

    Can someone help me subtract factions I don't know how to borrow. 12 1/3 - 7 2/5 LCD=15 So, 1/3 • 5/5 & 7/5 • 3/3 = 5/15 - 21/15 And then I have no idea what to do

    asked by Lilly
  91. Algebra

    Order the following numbers from least to greatest. √5, -0.1, (-5/3), 0.7, √2 a. 0.7, √2, (-5/3), √5, -0.1 b. √5, √2, 0.7, (-5/3), -0.1 c. (-5/3), -0.1, 0.7, √2, √5 ? d. -0.1, 0.7, √2, √5, (-5/3) To which subsets of real numbers does

    asked by Anonymous
  92. Geography (Ms. Sue)

    1). What Caribbean island is rich in natural gas, and what impact has this land on the economy? 2). What is the dominant vegetation of the Amazon river basin? 3). What is the main disadvantage of the slash-and-burn method of growing crops? 4). What is the

    asked by Anonymous
  93. Chemistry

    Consider the following reaction: 2Fe2O3 --> 4Fe + 3O2 ∆Hrxn° = +824.2 kJ The decomposition of 29.0 g of Fe2O3 results in a. the release of 150 kJ of heat b. the release of 12000 kJ of heat c. the absorption of 12000 kJ of heat d. the absorption of 150

    asked by Anonymous
  94. Chemistry

    Please help! I have spent hours trying to work these three problems. How many grams of solid barium sulfate form when 27.1 mL of 0.160 M barium chloride reacts with 53.4 mL of 0.065 M sodium sulfate? Aqueous sodium chloride forms also. I have converted the

    asked by Anonymous
  95. Geography

    In which direction does the Amazon River and its tributaries flow?

    asked by Anonymous
  96. Geography (Ms. Sue)

    What countries are drained by the Amazon and its tributaries? My answer: Bolivia, Brazil, Colombia, Ecuador, Peru, and Venezuela are drained by the Amazon and its tributaries.

    asked by Anonymous
  97. Chemistry

    The standard internal energy change for a reaction can be symbolized as ΔU°rxn or ΔE°rxn. For the following reaction equations, calculate the energy change of the reaction at 25 °C and 1.00 bar. Sn(s) + 2Cl2(g) --> SnCl4(l) ΔH°rxn = -511.3 kJ/mol

    asked by Anonymous
  98. Math

    The population of New York doubles during the workday. At the end of the workday, the population decreases by half. If the population in New York City is roughly 4,000,000 people before rush hour, and the morning rush hour lasts 3 hours, what would be the

    asked by Jessica
  99. Math

    A computer depreciates (loses its value) at a rate of 50% the original value every 2 years. If the computer now costs $75 after 6 years, how much did it cost when you bought it new?

    asked by Anonymous
  100. Math

    A new car depreciates as soon as you drive it out of the parking lot. A certain car depreciates to half its original value in 4 years. IF you bought a car 8 years ago, and it's now worth $5,000, how much did you pay for the car originally?

    asked by Anonymous
  101. Intermediate Algebra

    y/11=3

    asked by Brittany
  102. Cell Biology

    Suppose 1.00 ml of blood from a given donor contained 5 X 106 red blood cells and the donor’s hematocrit were 48%. Determine the surface area that the lipids extracted from the plasma membranes of red blood cells obtained from 10.0 ml blood would occupy

    asked by Cristian
  103. prealgerbra & introductory algebra

    -22+y=y/-14

    asked by Brittany
  104. algebra

    Can someone help me with steps showing select approximate value of x that are solutions to f(x)=0 f(x)=-7x^2 + 5x + 9

    asked by Alaska Diamond
  105. algebra

    -22x + 11y +55z =

    asked by John
  106. chemistry

    The radius of a aluminum atom is 143 pm. How many aluminum atoms would have to be laid side by side to span a distance of 4.90 mm?

    asked by sabrina
  107. english

    There was no danger, difficulty, or that could ponce de leon from venturing into the jungles of florida to search for the fountain of youth. a= obstructuion...deter b=procrastination... subside i know the definitions its to hard i think its b

    asked by someone
  108. Chemistry

    An element with the symbol Z has the electron configuration 2.8.6. Which species is this elrment most likely to form? A. The ion Z 2+ B. The ion Z 6+ C. The compound H subscript 2 Z D. The compound Z subscript 6 F Which ionization requires the most energy?

    asked by Anonymous
  109. PURE MATHEMATICS

    5) find the complex number z and w such that z+w=4+3i and z-iw=3-2i

    asked by Queenie
  110. English

    what is the Past Present and future for carry

    asked by bonita
  111. socials

    An extension to my other question- how did oliver cromwell like impact the world and why was he significant? It could relate to if he had high moral principles. I wrote my essay but I don't know how to close it up.

    asked by bethany
  112. Chemistry

    When electrons get excited can they only move up one level or can they go up multiple orbitals, but just one at a time.

    asked by Serena
  113. physics

    Two stones are thrown simultaneously, one straight upward from the base of a cliff and the other straight downward from the top of the cliff. The height of the cliff is 5.16 m. The stones are thrown with the same speed of 8.67 m/s. Find the location (above

    asked by Jay
  114. Algebra

    Is -7 + 9 = -9 + 7 true, false, or open? a. true b. false (this one?) c. open Is 4x - 3 = 19 true, false, or open? a. true b. false c. open (this one?) Which of the following is a solution to the equation 16 = 4x - 4? a. -5 b. -4 c. 5 (this one?) d. 16

    asked by Anonymous