Questions Asked on
May 14, 2011

  1. Math

    Solve the equation. Identify any extraneous solutions. x = sqrt root 3x + 40

  2. physics

    A proton and an electron in a hydrogen atom are separated by a distance of 5.3 x 10-11 m. The magnitude and direction of electric field set up by the proton at the position of the electron is: a. 5.1 x1011 N/C away from the proton b. 5.1 x1011 N/C toward

  3. Chemistry

    A solution contains 0.133 g of dissolved Lead. How many moles of soduim chloride must be added to the solution to completly precipitate all of the disolved lead? What mass of sodium chloride must be added?

  4. Physics

    A 18 kg child slides down a 4.0 m-high playground slide. She starts from rest, and her speed at the bottom is 2.8 m/s. What is the change in the thermal energy of the slide and the seat of her pants?

  5. Chemistry

    What is the heat required in Joules to raise the temperature of 100.0g ice at -20 degrees C to steam at 120 degrees C?

  6. Physics

    Using the Bohr model of hydrogen, find the linear momentum, when n=3.

  7. Math

    write numeral as hindu- arabic numeral _ XMMDCLXII

  8. geometry

    WHAT IS THE LATERAL AREA FORMULA FOR A TRAPEZOID PRISM

  9. pleaseeeee help - physics

    Four charges are placed at the four corners of a square of side 15 cm. The charges on the upper left and right corners are +3 μC and -6 μC respectively. The charges on the lower left and right corners are -2.4 μC and -9 μC respectively. The net

  10. Algebra

    Which relation is not a function? 1)(x-2)^2+y^2=4 2) x^2+4y+y=4 3) x+y=4 4) xy=4 So, I could eliminate some answers. My answer is either its 1 or 2. Can anyone help me?

  11. physics

    A capacitor has a capacitance of 3 pF. What potential difference would be required to store a charge of 21 pC? Choose one answer. a. 3 V b. 21 V c. 7 V d. 0.14 V

  12. Physiology

    Suppose a salt and a glucose solution are separated by a membrane that is permeable to water but not to the solutes. The NaCl solution has a concentration of 1.95 g per 250 mL (molecular weight = 58.5). The glucose solution has a concentration of 9.0 g per

  13. history

    How is that Buddhism declined after the Muslim invasions while Hinduism survived?

  14. physics

    A proton traveling at 10^4 m/s in the positive x-direction, enters a region where there is uniform electric field of magnitude 10 v/m and a uniform magnetic field of magnitude 10^-2 T. The electric and magnetic fields are parallel and are in the

  15. algebra

    A university bookstore recently sold a wirebound graph-paper notebook for $0.88, and a college-ruled notebook for $2.38. At the start of spring semester, a combination of 50 of these notebooks were sold for a total of $59.00. How many of each type were

  16. Physics Calculation

    The weight of an apple near the surface of the earth is 1N. What is the weight of Earth in the gravitational field of the apple?

  17. chemistry

    if unlimited iron is available to react with 34.0g of copper (II) chloride, how many g of copper metal would be produced?

  18. physics]

    a body moving along a straight line at 20 m/s undergoes an acceleration of 4 metre per second square.after two seconds what will be its speed? also, find the displacement .

  19. Stats

    Do more than 50% of US adults get enough sleep? According to the Gallup organization's December 2004 Lifestyle Poll, 55% of US adults said that they get enough sleep. The poll was based on a random sample of 1003 adults. Test an appropriate hypothesis and

  20. Trig- Check my answer Please

    Find the reference angle for -144 degrees. I'm coming up with 504 degrees, but I think I'm missing a step.

  21. Chemistry

    A 108g piece of unknown metal is heated to 100 degrees C in boiling water. The heated sample of metal is then dropped into 50ml of H20, which is initially at 23.0 degrees C. After a few minutes the temp. of water raises to 37.5 degrees C. What is the

  22. physics

    an iron bar measures 11 cm x 7 cm x 5 cm it is melted down to make a cylinder height of 9 cm what is its radius

  23. Chemistry

    Calculate the [H+] in a solution that has a pH of 9.00.

  24. cyber security

    Prior to the discovery of any specific public-key schemes such as RSA, an existence proof was developed whose purpose was to demonstrate that public-key encryption is possible in theory. Consider the following tables, as shown below: M1= 5 4 2 3 1 M2= 5 2

  25. math

    a farmer is building a fence around his yard. one side of the fence will be the side of his barn , the other three sides will be made of wood. He has enough materials for 120m of fence, what is the maximum area he can enclose ? what are the dimensions

  26. physics

    Four charges are placed at the four corners of a square of side 15 cm. The charges on the upper left and right corners are +3 μC and -6 μC respectively. The charges on the lower left and right corners are -2.4 μC and -9 μC respectively. The net

  27. english ,,please check my grammar

    please help me to get the correct grammar... thank you.. my father is turning 76 and he’s still physically strong and healthy and my mother is turning 75 and she’s also doing good her life and living together.we are nine members in our family and I

  28. physics

    If a boat and its riders have a mass of 800 kg and the boat drifts in at 1.5 m/s how much work does Sam do to stop it?

  29. chemistry

    tell the taste of these types of water well water mineral water fresh water tap water earated water?

  30. chem

    Citric acid, the compound responsible for the sour taste of lemons, has the following elemental composition: C, 37.51%; H, 4.20%; O, 58.29%. Calculate the empirical formula of citric acid. so i did that and got C6H8O7 but now i need to find the molecular

  31. Chemistry

    A solution contains an unknown amount of dissolved calcium . Addition of 0.112 mole of K3PO4 causes complete precipitation of all the calcium. How many moles of calcium were dissolved in the solution?

  32. Mathematics

    Q1.A man earn $1200 and spends $450 per month.Find ratio of (a)His income to his expenditure and (b)His savings to his income Q2.An open water tank with length 20 cm and width 15 cm holds 4.8 liters of water.calculate the height of the water level tank and

  33. abou the internet

    How can you decide if a webpage is authentic and not just the opinion of somenone wishing to push a particular viewpoint?

  34. Algebra

    what is the square root of 12x^3y^2

  35. Statistics

    Find the population standard deviation for the data set? 1, 2, 3, 5, 6, 7

  36. History

    Hi I'm evaluationg sources and I need help finding out more informatoin on Z.A.B Zeman. IN the book, he said something about being a marxist/socialist/communist but i'm not sure what and its kinda urgent that I find out... I've been working real hard.

  37. Science

    What two major factors determine the size of a star? Is it a) Gravity and Mass OR b) The force of gravity pulling in trying to make the star as small as possible and the outward pressure from the radiation generated in the core trying to swell it up.

  38. crossword help

    -a type of search that uses word with specific meanings -A combination of more than one search engine -Use this type of searching if you find nothing with a simple search

  39. res342

    In conducting research that looks at differences in populations, samples are used for numerous reasons. Using entire populations in a test is difficult, so various sampling techniques are applied. In situations in which the population variance is unknown,

  40. psy/211

    what is a theory and how do you write one

  41. math

    is g=((1,1),(2,3),(3,5),(4,7))is a function from A=(1,2,3,4)to B==(1,3,5,7)?if this is given the formula g(x)=ax+b,then find a & b?

  42. Physiology

    Before the invention of refrigerators, pioneers preserved meat by salting it. Explain how meat can be preserved by this procedure.(Hint: think about what salting the meat would do to decomposer organisms, such as bacteria and fungi)

  43. Chemistry

    Calculate the [H+] in a solution that has a pH of 9.00.

  44. Physiology

    Would you expect the muscle fibers of the tongue to be striated or smooth? What about the muscle of the diaphragm? Explain your answer.

  45. history

    To what extent do you believe that these turbulent and violent images may have contributed to Republican Richard Nixon's General Election victory in November 1968 - by a very, very narrow margin?

  46. Physiology

    Compare and Contrast the structure and function of the epithelium of the skin and the epithelium of the intestion

  47. Physiology

    Suppose you were to grind up and homogenate a pancreas. Do you think it would be possible to isolate insulin from this hemogenate? ( Hint: remember that the pancreas is also an exocrine gland, producing pancreatic juice) Explain your answer

  48. Physics

    Which requires more fuel- a rocket going from the earth to the moon or a rocket coming from the moon to earth? Please explain why. Thank you so much :)

  49. Science

    What are two competing effects that determine the size of the star? Please keep the answer short and thank you.

  50. Science

    By what factor would your weight change if the earth's diameter were doubled and its mass were also doubled? Thanks :)

  51. thank you mathmate

    Thank you for your help

  52. Physics

    A projectile is launched beneath the straight line path it would follow if there was no gravity. How many metres does it fall below the line if it has been travelling for 1 second? 2 seconds?

  53. Physics

    A ball is thrown upwards from the ground with a velocity of 30m/s. How long will it take to reach a point 10.0m above the ground on its way down?

  54. Math

    Write an equation which models how old in years each of you will be when you are three times as old as the younger person. My age is 30, my son is 6.

  55. English

    Summary, Analysis, Synthesis, and Evaluation Review the four paragraphs below. There is one paragraph matching each of the following types: summary, analysis, synthesis, and evaluation. Once you have read each paragraph, complete the following chart to

  56. history

    why is the mining industry in British Columbia so dependent on world prices and markets

  57. physics

    Consider the system shown in the figure below with m1 = 30.0 kg, m2 = 13.7 kg, R = 0.110 m, and the mass of the pulley M = 5.00 kg. Object m2 is resting on the floor, and object m1 is 4.60 m above the floor when it is released from rest. The pulley axis is

  58. physics hw urgent please

    show how you would you arrange to find f in terms of v,m and r from four equations below. f=1/t, f=ma,v=2piR/T,a=v^2/R Thanks

  59. Chem

    A) Calculate the pH of a buffer system that is 0.06 M HNO2 and 0.160 M NaNO2 B) What is the pH after 2.00 M NaOH are added to 1.00 L of this buffer I can do part A but I don't know how to part B

  60. Chemistry

    Silver crystallizes in a face centered cubic unit cell with an edge length of 0.40836 nm. Calculate the density of silver in grams per cubic centimeter i know the answer is 10.5 g/cm^3 but i keep getting lost in figure it out.

  61. ALPHA OMEGA MATH GRADE 8

    TO FIND THE TOTAL AREA OF A RECTANGULAR SOLID CARTON. LENGTH: 4 1/2 FT HEIGHT: 2 FT WIDTH: 3FT

  62. pharmacy

    What patient issues might arise when working in an institutional pharmacy setting?

  63. physics

    .250 kg toy airplane is suspended from the ceiling in a conical pendulum. It flies with a radius of 10 cm, and has a period of 20 seconds. Find the centripetal force acting on the plane?

  64. Chemistry

    An element has ccp packing with face-centered cubic unit cell. Its density is 3.78 g/cm^3 and the unit cell volume is 2.31 x 10^-25 L. Calculate the molar mass (g/mol) of the element to 3 sig figs. the answer is 131 g/mol i first changed 2.31 x 10^-25 L to

  65. English

    Can you check these sentences for me, please? Thank you 1) Eliot's The Waste Land is divided into five unequal sections which show no realistic or logical continuity. 2) The first four sections correspond to the four Greek classical elements of earth,

  66. ssc

    Suppose that the governmental authorities wished to decrease use of a pesticide that is leaching into groundwater supplies in a watershed by 60% from current use levels. Discuss the advantages and/or disadvantages of distributing marketable pesticide

  67. algebra

    9t^4 + 7t - 45 t^3 + 10t. Now, please combine your like terms.

  68. English

    I left out the following sentences. Thank you. 1) In particular, he uses allusions to thirty-five writers in six languages along with allusions to various philosophical and religious traditions. 2) April is described as the cruellest month since it "stirs"

  69. math

    answer in simplest radical form. sin 90 degrees

  70. math

    answer in simplest radical form. sin 90 degrees

  71. algebra

    9t^4 + 7t - 45 t^3 + 10t. Now, please combine your like terms.

  72. algebra

    9t^4 + 7t - 45 t^3 + 10t. Now, please combine your like terms.

  73. trig

    if sin 0 > 0 and tan 0 < 0, what quadrant contains the terminal side of 0.

  74. trig

    If cos 0 = - 1/2 and tan 0 > 0, find the quadrant that contains the terminal side of 0, and then find the exact values of the other five trig functions of 0.

  75. Statistics

    suppose you flip a fair coin five times. which of these pairs of events are disjoint? (a). you get five heads;you get four heads and a tail (b). the first flip is a head;the second flip is a head (c). you get five heads; the second flip is a tail (d). you

  76. Chemistry

    how many radicals are in CuSO4? What occurs to CuSO4 particles in terms of temperature,energy and particles Arrangment as they move from matter to solid? What is the proccess called? (moving from liquid to solid)

  77. maths

    The variation in a population is modelled by the recurrence relation (Jn+1 0.9257 0.0208) (Jn) + (0.014) (An+1 0.0661 0.9767) (An) (0.056) where Jn and An are the sizes, in millions, of the subpopulations of juveniles and adults, respectively, n years

  78. maths

    Choose the THREE options that define sequences that do not converge. Options A P0 = 40, Pn+1 − Pn = 2.8 Pn (1− Pn/300) (n = 0,1,2, . . .) B P0 = 100, Pn+1 − Pn = 0.7Pn (1− Pn/480) (n = 0,1,2, . . .) C P0 = 250, Pn+1 − Pn = 2.4Pn (1− Pn/420) (n

  79. maths

    The mean weight (1.0042kg)of the contents of samples of 30 bags of sugar has standard error 0.008kg. Choose the option that is closest to the probability, to three decimal places, that the mean weight of the contents of samples of 30 bags of sugar will be

  80. math

    find the volume of a cone that is 18in. high and has a 6 in radius

  81. math

    find the volume of a cone that is 18in. high and has a 6 in radius

  82. math

    10 in equals feet giving in fraction form

  83. math

    680 centimeters equals feet give answerin decial form to the nearest 1/100

  84. maths

    f(x)=ln(e^x-e^-x), x>0 By applying in turn the Composite and Quotient Rules, find derivative and second derivative. Thanks.

  85. math

    a doctor orders 570 ml of cough medicine. how many ounces is that?

  86. English

    Is this a slant rhyme: toes and soul

  87. Probability

    A college professor has been studying the relationship between the attendance habits of his students and the grades they earn in his courses. A breakdown of 200 of his students revealed the following: Attended regularly --- 160 Attended sometimes --- 40

  88. Grammar-Writeacher

    Identify the simple subject and simple predicate in each sentence. There are children waiting in the lobby. Simple subject: = children simple predicate = are waiting (asked yesterday and you said - * was waiting *) wondering if you meant are waiting

  89. Normal Probability Distribution

    A professor at a local college noted that the grades of his students were normally distributed with an average percentage of 74 and a population standard deviation of 10. He found that 6.3% of his students received A's while 2.5% of his students failed the

  90. trig

    if point P is a point on the terminal side of 0, and 0 is in standard position, find sin 0,cos 0 and tan 0. 1. P(-6,8) 2. P (1,3) 3. P (-2,-40), 4. P (-5, -12)

  91. com/156

    When developing your arguments for your final essay, how might you determine what is fact and what is opinion? Does the opinion of an expert in the field carry more weight than the opinion of someone that is not? Explain why or why not. Find one factual

  92. Calculus

    lim sin2x x->0 ----- x How do I get rid of the x on the bottom in order to solve this problem? Thanks!

  93. English

    Is there a better word for 'morally wrong" and "sinful"? I have been using those two words once already and I don't want to sound repetitive. Sentence: It is sinful and morally wrong for women to have sexual desires in Afghanistan.

  94. English

    So get in where you fit in go on and shine free your mind is this a hyperbole

  95. Business

    You have been retained to analyze how many check-in agents should be used at a check-in counter for a large hotel. During normal business hours, customers arrive at a rate of about 24 per hour, and it takes about 7 minutes to complete the check-in process.

  96. CHEMISTRY

    What is the oxiden number of NO2?

  97. pharmacy

    The professional's guide to face-to-face counseling is

  98. physics

    A ball is thrown vertically upward with a speed of +12.0 m/s. How long does the ball take to hit the ground after it reaches its highest point? What is its velocity when it returns to the level from which it started?

  99. arithmetic

    _ / _ x _ + _ x _ x _ / _ + _ x _ = 100

  100. Grammar-Writeacher

    Thank You Writeacher and others at Jiskha - you are Awesome - I got 96% on my Exam - should really have been 98-100% but that is computers and not being able to take it up with a Teacher. Wrong ones: Identify the simple subject and simple predicate.

  101. PHYSICS

    iF PROVIDED WITH THE FOLLOIWING WOODEN RAMP,A BALL,METRE STICK, APLUMBLINE AND CARBON PAPER USING LAW OF CONSERVATION H=R^2/1+(I/mr^2) CAN i FIND THE MOMENT OF inertIA BY PLOTTING A GRAPH AND DOING AN EXPOREMENT.

  102. PHYSICS

    iF PROVIDED WITH THE FOLLOIWING WOODEN RAMP,A BALL,METRE STICK, APLUMBLINE AND CARBON PAPER USING LAW OF CONSERVATION H=R^2/1+(I/mr^2) CAN i FIND THE MOMENT OF inertIA BY PLOTTING A GRAPH AND DOING AN EXPOREMENT.

  103. Medical Assisting

    How does blood stay in a liquid form in the blood vessels?

  104. English

    I have a verb packet and I need the answers to B. Helping verbs and Main Verbs

  105. hum

    Identify leaders of the Civil Rights and Black Power movements and their contributions to their respective causes.

  106. health

    define 5 pathologies: give definition, give a treatment, will the person survive,anything else interesting. Include references Please type, 10-15 sentences each pathology.

  107. GEOMETRY

    USE RHOMBUS ABCD. FIND VALUE OF X, IF M DCB = 5X - 10 AND M DAC = X + 10.

  108. Finance

    I need help computing the Annual percentage yield (APY) for a savings account that earned $56 in interest on $800 over 365 days? HELP PLEASE!

  109. Life orientation

    5 ways in which human or environmental problem on the community in south africa

  110. medical terminology

    ok can you give me 5 pathologies and I will look them up. Im not sure what pathologies are.

  111. Humanities Core

    In what ways can we say that quantum physics both is and is not classical science? it has something to do with galileo but im not sure....

  112. Finance

    I need help computing the Annual percentage yield (APY) for a savings account that earned $56 in interest on $800 over 365 days? HELP PLEASE!

  113. math

    Hi I need some help with this math problem..... x - 3/4= 5/6

  114. chemistry

    write the formula of each acid and identify each as a diprotic, a triprotic, or a monoprotic acid sulfuric acid,perchloric acid,phosphoric acid,hydrofluoric acid,acetic acid

  115. Trig- Check my answer Please

    Find the unit vector in the direction of . Do not approximate any numbers in your answer. I get (-1/sqrt10) and (-3/sqrt10)

  116. Square root

    324w^9x^8/48w^5x^5

  117. math

    10 inches equals feet give the answer in a fraction

  118. Business Finance

    If a bank borrows $550,000 from the FED on Friday and repays it on Monday show how it should be written on a T-account for this transaction

  119. Accouting

    The adjusting entry to record supplies expense accomplishes which of the following?

  120. Reaearch - URGENT PLZ HELP

    Hi An pdf file called RUssian COllectivisation was written by a George Beers. I cant find any info on the date of publication or on the author, George Beers HELP!

  121. math

    a doctor orders 570 ml of cough medicine. how many ounces is that?

  122. math

    find the volume of a sphere with a 15in. radius

  123. College Math

    Movies A survey of 350 customers was taken at Regal Cinemas in Austin, Texas, regarding the type of movies customers liked. The following information was determined. • 196 liked dramas. • 153 liked comedies. • 88 liked science fiction. • 59 liked

  124. Reseach - source evaluation HELP

    Hi, I've been exhausting my opportunities to try and find out the credidentials for this pdf. I need the original date of publication I need the credidentials of the author Its called Russian Collectivisation by George Beers. This is not to put in my

  125. MATH

    [3X(-3)-4X(-2)+5X2]+[-2X(-3)+8X(-2)-8X2]

  126. English 4

    I'm doing a monthly essay proverb. I wanna know what's the figure of speech in "absent makes the heart forget." ?

  127. Auto

    If the engine is vibrating within a certain rpm range, what is the likely cause?

  128. Math

    if someone is born on Nov 01, 1998 how old are they in may 2011 or in 2011? shouldn't they be 13 but in my answer book the answer is 12. how come? im confued?

  129. MATH

    [3X(-3)-4X(-2)+5X2]+[-2X(-3)+8X(-2)-8X2]

  130. Chemistry

    A solution contains 0.133 g of dissolved Lead. How many moles of sodium chloride must be added to the solution to completely precipitate all of the disolved lead? What mass of sodium chloride must be added?

  131. Infinite math

    use the M method to solve the following linear programming problem: Minimize C+ -5x+10x+15x Subject to 2x+3x+x (or equal to) 1 x,,x,x>(and equal to) 0

  132. health

    what do you teach for 5th grade Health class?

  133. geometry

    how do 83/100 simplify to 5/6

  134. Physics

    What is the path of satellite called?

  135. Trig

    I need help, I don't remember what to do. Find all solutions of the equation in the interval [0,2pi]. (2cosè+sqrt3)(cscè+1)=0 Write your answer in radians in terms of pi. If there is more than one solution, separate them with commas.

  136. Chemistry

    How many grams of BaCO3 will dissolve in 3.0 L of water containing a Ba+2 concentration of 0.5 M (Ksp= 5.1E-9) My work: BaCO3 Ba+ + CO3- i 0.5 M c -s +s +s e 0.5 +s +s (s)(0.5+s)= 5.1E-9 s= 1.0E-9mol/L x 3.0 L x 197.336 g/L= 5.92E-6 grams of BaCO3

  137. calculus

    Evaluate the indefinite integral: y^3*sqrt(y + 5) dy.

  138. calculus

    Evaluate the indefinite integral: y*(y+5)^1/3 dy.

  139. HSM/220

    i need help with this one. i need to know where to start at. i am not sure where to begin detailing how a human service organization focused on providing job skills to high school dropouts would address the following: • Statement of opportunity •

  140. Applied Physics

    A 10 kilogram object subjected to a 20 Newton force moves across a horizontal frictionless surface in the direction of the force. Before the force was applied, the speed of the object was 2.0 meters/second. When the force is removed the object is traveling

  141. Liff Orientation

    In 10-15 lines critically discuss 5ways in which the human or environmental problem impacts on the community.provide relevant sources to support your claims.

  142. Lord Selkirk

    Lord selkirk can be said to hve been an "unrealistic idealistic". I need evidence to suppor or refute this claim. Does this phrase mean..Fake or didn't know what he was doing?

  143. Statistics

    If one card is randomly selected, what is the probability that the card selected is neither an ace nor a jack?

  144. maths

    The mean weight of the contents of samples of 30 bags of sugar has standard error 0.008kg. Choose the option that is closest to the probability, to three decimal places, that the mean weight of the contents of samples of 30 bags of sugar will be 1kg or

  145. Calculus/Trigonometry

    What is the value of x in the equation of an ellipse??? Equation of an ellipse - (x^2/a^2) + (y^2/b^2) = 1

  146. maths

    The variation in a population is modelled by the recurrence relation (Jn+1 0.9257 0.0208) (Jn) + (0.014) (An+1 0.0661 0.9767) (An) (0.056) where Jn and An are the sizes, in millions, of the subpopulations of juveniles and adults, respectively, n years

  147. maths

    Choose the THREE options that define sequences that do not converge. Options A P0 = 40, Pn+1 − Pn = 2.8 Pn (1− Pn/300) (n = 0,1,2, . . .) B P0 = 100, Pn+1 − Pn = 0.7Pn (1− Pn/480) (n = 0,1,2, . . .) C P0 = 250, Pn+1 − Pn = 2.4Pn (1− Pn/420) (n

  148. Research

    Heya! Where can I get photos/cartoons on dekulakisation and collectivisation? PLZ don't say google! Coz I'm not allowed to use links straight off it. Still need help with my question, a few questions below this one.

  149. english

    Is incense a social problem and why ?

  150. ohysics

    how to find the tension in two strings, 0.75 kg meter stick is supported at the 10 cm mark and the 75 cm mark by strings. a 3.5 kg is at the 25 cm mark and a 2.5 kg is at the 90 cm mark.

  151. physics

    a fis is suspended from a 6m uniform beam supported by a cable and attached by a pivot to the ground. the beam has a mass of 20 kg and the cable can withstand a maximum tension of 10000 N. find masimum wright of a fish that can be supported by this system

  152. physics

    a person holds a 5 kg mass in his hand. the forearm is held 45 degrees below the horizonal. the biceps muscle isa attached 5cm from the elbow ad th eight is held 35 cm from the elbow. neglecting mass of the forearm find the tension in the bicep muscle.

  153. geometry

    the adjacent angles of a parallelogram are (3x-120 and (52+2x0.find the angles of the parallelogram?

  154. algebra

    If the cost of a cell phone has decrease 400% during the past 10 years, does that correspond to a cost decrease of 4 times

  155. Chemistry

    What is the heat in Joules required to raise the temperature of 100g H20 from 288K to 308K?

  156. Applied Physics

    The velocity of an object is +47 meters per second at 3.0 seconds and is +65 meters per second at 12.0 seconds. The average acceleration of the object is 2.0 m/s to the fourth power

  157. mensuration

    A rectangle lawn 20meter long and 12meter wide is bordered by a path 2 meter wide. Find area of the path?

  158. Applied Physics

    An object is dropped from a height of 49 meters. The object takes 3.2s to hit the ground. The final velocity of the object when it hits the ground is -31 m/s

  159. statistics

    According to the IRS, 70% of Americans file their taxes electronically. For a group of 12 American adults who were selected at random, what is the probability that at least five of them file their taxes electronically?

  160. physics

    A 15kg wedding cake is allowed to slide freely down a smooth 30degree inclined. Find the resultant force down the inclined and the acceleration of the object.

  161. Applied Physics

    A car is traveling at 20 meters per second. The driver steps on the brake. The car is in equilibrium

  162. physics

    A ball is thrown downwards at 15 degree to and below the horizontal with a velocity of 15m/s from a slope of 10m high. Determine the time taken by the ball to travel in the air and the horrizontal distance it will travel

  163. physics

    A 30kg box of vegetable moves down a 35 degree frictionless inclined. Find the resultant force down the inclined and the acceleration down the inclined

  164. General - URGENT

    Hi Theres this cartoon, it says: Kulak je nejzavilejsi nepritel socialismu. It shows a small fat man lifting up the cheek of a taller man as if he likes him. The shadow shows the fat man chocking the thin man and instead of a torch/candle behind him he is

  165. math

    If you borrow $1,700 at 7% simple interest, how much interest will you pay? A. $7.00 B. $120 C. $119 D. $1819 1,700x0.07 i chose c but i wanted to make sure

  166. Statistics

    Suppose that weights are bell shaped with a mean of 120 pounds and a standard deviation of 10 pounds. What percentage of weights is between 110 and 130 pounds

  167. Math

    Suppose the mean heights of a population are 72 inches with a standard deviation of 2 inches. What height (x) corresponds to the z value of 1

  168. math

    translate the hindu-arabic number equivalent roman numeral 273

  169. bio

    How do organs get the nutrients from blood?

  170. Stats

    Angela is conducting a poll on campus to determine the next student representative. How many students does she need to sample for a confidence level of 90% with a margin of error of + or - 5%?