Popular questions and responses by MELISSA
  1. calculus

    Make a substitution to express the integrand as a rational function and then evaluate the integral. (Use C for the constant of integration.) 1/x{(x-1)^1/2} dx

    asked on April 6, 2017

    Write formulas for the compounds that form from In and each of the following polyatomic ion: NO−3, SO2−4, PO3−4. (Assume In charge is 3+.) InNo9, InSO6, AND InP4 is wrong

    asked on June 24, 2016
  3. algebra/pre-calc - please help

    Lines can be used to approximate a wide variety of functions; often a function can be described using many lines. If a stock price goes from $10 to $12 from January 1st to January 31, and from $12 to $9 from February 1st to February 28th, is the price

    asked on November 19, 2016
  4. forces

    Two teams of nine members each engage in a tug of war. The first team's members have average masses of 64 kg and exert average forces of 1350 N horizontally. The second team's members have average masses of 69 kg and exert average forces of 1365 N

    asked on February 8, 2014
  5. Calculus - Rates of Change

    A water tank has a shape of an inverted cone with a base radius of 2m and a height of 4 m. If water is being pumped into the tank at a rate of 2m3/min, then find the rate at which the water level is rising when the water is 3m deep. Attempted solution: V=

    asked on March 7, 2016
  6. physics

    A 6.0 kg object undergoes an acceleration of 2.0 m/s2.a. What is the magnitude of the net force acting on the object?b. If this same force is applied to a 4.0 kg object, what acceleration isproduced?

    asked on December 3, 2009
  7. physics

    A child throws a ball with an initial speed of 8 m/s at an angle of 40 degrees above the horizontal. The ball leaves her hand 1 m above the ground. How long is the ball in flight before it hits the ground? What is the magnitude of the ball's velocity just

    asked on September 19, 2010
  8. physics

    a father pulls his young daughter on a sled with a constant velocity on a level surface through a distance of 10-m, if the total mass of the sled a the girl is 35-kg and the coefficent of kinetic friction between the sled runners and the snow is 0.20, how

    asked on January 26, 2008
  9. Physics!! Help!!!!!

    A wire of length L and cross-sectional area A has resistance R. What will be the resistance R_stretched of the wire if it is stretched to twice its original length? Assume that the density and resistivity of the material do not change when the wire is

    asked on February 15, 2012
  10. geometry

    If the endpoints of the diameter of a circle are (3, 1) and (6, 5), find the length of the diameter.

    asked on October 14, 2012
  11. Math

    A sensor light installed on the edge of a home can detect motion for a distance of 50ft. in front and with a range of motion of 192degree. Over what area will the sensor detect motion and become illuminated?

    asked on February 20, 2012
  12. Investments

    Melissa Popp is thinking about buying some shares of R.H. Lawncare Equipment, at $48 per share. She expects the price of the stock to rise to $60 over the next 3 years. During that time she also expects to receive annual dividends of $4 per share. A. What

    asked on April 15, 2014

    Write formulas for the compounds that form from Sr and each of the following polyatomic ion: NO−3, SO2−4, PO3−4. APPARENTLY SrNO6, SrSO4 , Sr3PO8 is wrong

    asked on June 24, 2016

    Provide the name of the oxyanion of the acid HNO2(aq) I ENTERED Carbonate ion BUT ITS WRONG

    asked on June 24, 2016
  15. physics

    The distance between the second and sixth crests in a wave is 75cm and one crest travels a distance of 25 cm in 3.0s . Find the frequency of the wave

    asked on June 6, 2012
  16. Chemistry

    What mass, in grams, of sodium carbonate is required for complete reaction with 8.35g of nitric acid to produce sodium nitrate, carbon dioxide, and water? [Show work]

    asked on February 12, 2014
  17. math

    a ball is dropped from a height of 3m and bounces on the ground . At the top of each bounce, the ball eaches 60% of its previous height. Calculate the total distance travelled by the ball when it hits the ground for the fifth time

    asked on December 17, 2011
  18. Math

    Find the area under the standard normal curve to the right of z = -1.25.

    asked on December 9, 2009
  19. Math

    4 letters are typed, without repetition. What is the probability that all 4 will be vowels? Write your answer as a percent. Round your answer to three decimal places.

    asked on November 19, 2017
  20. physics

    A fan at a baseball game is 100.0m from the home plate. If the speed of sound is 350 m/s , how long after the batter actually hits the ball does the fan hear the crack? Assume that there is no wind.

    asked on May 20, 2012
  21. math

    A farmer has 90 meters of fencing and would like to use the fencing to create a rectangular garden where one of the sides of the garden is against the side of a barn. Let L represent the varying length of the rectangular garden (in meters) and let A

    asked on September 2, 2018
  22. physics

    The distance between successive crests in a series of water waves is 5.0m; the crests travel 8.6m in 5.0s . Calculate the frequency of a block of wood bobbing up and down in the water

    asked on June 18, 2012
  23. Math !!!!!

    a function f(x)has doamin {xeR/x>-4} and range {yeR/y

    asked on September 24, 2011

    Write formulas for the compounds that form from Sr and each of the following polyatomic ion: NO3 −1, SO4 −2, PO4 −3. SR (+3 CHARGE) NO3(-1 CHARGE) SO4(-2 CHARGE) PO4(-3 CHARGE) Re posting this question. hopefully someone can help me answer this now.

    asked on June 24, 2016
  25. Chemistry

    I am doing a lab online and have no clue on how to get started with the following questions? Please Help me! 1. Calculate and record the following (in grams): (a) mass of NaCl by subtraction of other components: (b) measured mass of NaCl after boiling away

    asked on October 23, 2010
  26. Chemistry

    Write the chemical formulas for the compounds containing each of the following: a) one calcium atom for every two iodide atoms. b) two nitrogen atoms for every four oxygen atoms. c) one silicon atom for every two oxygen atoms. d) one zinc atom for every

    asked on July 1, 2010
  27. math

    what do you call a duck that steals

    asked on January 12, 2010
  28. Finance

    Aset P has a beta of 0.9. The risk-free rate of return is 8%, while the return on the S&P 500 is 14%. Asset P's required rate of return is:

    asked on June 17, 2012
  29. math

    The value of an investment A (in dollars) after t years is given by the function A(t) = A0ekt . If it takes 10 years for an investment of $1,000 to triple, how many years will it take for the investment to be $9,000? Simplify your answer completely. I am

    asked on March 10, 2017
  30. math

    When one rents an apartment, one is often required to give the landlord a security deposit that is returned if the apartment is undamaged when you leave. In some localities, the landlord is required to pay the tenant interest once a year compounded yearly.

    asked on January 29, 2019
  31. Math

    4 letters are typed, with repetition allowed. What is the probability that all 4 will be vowels? Write your answer as a percent. Round to the nearest hundredth of a percent as needed.

    asked on November 19, 2017
  32. physics

    A 160kg horizontal beam is supported at each end. A 330kg piano rests a quarter of the way from one end. What is the vertical force on each of the supports?

    asked on November 27, 2012
  33. physics

    Some children go tobogganing on an icy hill. The start from the rest at the top of the hill. The toboggan and children have a combined mass of 94 kg. The height of the first hill a is 12.0m the height of b is 0, and the height of c is 3.0m. If friction is

    asked on June 15, 2012
  34. college algebra

    A magazine company had a profit of $98,000 per year when it had 32,000 subscribers. When it obtained 35,000 subscribers, it had a profit of $117,500. Assume that the profit P is a linear function of the number of subscribers s. a.) Find the function P b.)

    asked on February 28, 2012
  35. 12th Physics

    A 55 kg ice skater is at rest on a flat skating rink. A 198 N horizontal forceis needed to set the skater in motion.However, after the skater is inmotion, a horizontal force of 175 N keeps the skater moving at a constantvelocity. Find the coefficients of

    asked on December 8, 2009
  36. physics

    A particular guitar string is supposed to vibrate at 210Hz , but it is measured to vibrate at 220Hz By what percent should the tension in the string be changed to correct the frequency?

    asked on December 13, 2012
  37. Calculus

    Let F(s)=5s2+5s+4 . Find a value of d greater than 0 such that the average rate of change of F(s) from 0 to d equals the instantaneous rate of change of F(s) at s=1. d=

    asked on September 13, 2010
  38. Chemistry

    I am really having trouble answering this question, can someone help? A binary compound between an unknown element E and hydrogen contains 91.27% E and 8.73% H by mass. If the formula of the compound is E3H8, calculate the atomic mass of E.

    asked on September 12, 2010
  39. accoutning

    what is an advantage of the partnership form of business organization is? 1. unlimited liability 2. mutual agency 3. ease of formation 4. limited life

    asked on July 30, 2010
  40. psychology

    Which of the following characteristics is associated with sense of hardiness? -Pessimism - Believing in fate, destiny, and luck - Expecting positive outcomes - Viewing stressors as challenges are met - Type B behavior pattern I think it's the second or

    asked on November 19, 2008
  41. physics

    Write the energy transformation equation for each situation Fireworks explodes An arrow is shot off a bow and flies through the air A paved driveway feels hot on a clear ,sunny day A camper raises an axe to chop a chunk of wood A lawn mower with a gasoline

    asked on April 12, 2012
  42. Math

    You estimate that a puppy weighs 12 pounds. The actual weight of the puppy is 14 pounds. Find the percent error. Round your answer to the nearest hundredth of a percent. Help me Im stuck..!

    asked on February 29, 2016
  43. stat

    A physician routinely makes physical examinations of children. She is concerned that a three-year-old girl has a height of only 87.8 cm. Heights of three-year-old girls have a mean of 97.5 cm and a standard deviation of 6.9 cm (based on data from the

    asked on March 15, 2014
  44. UV

    the two lenses in contact are 45 cm away from the object and the distance of the object from the image is 110 cm. if one of the two lenses in contact has a focal length of 15cm, what is the focal length of the second lens? thanks :)

    asked on March 8, 2014
  45. physics

    What's the shortest air column , closed at one end, that will resonate at a frequency of 440.0Hz when the speed of sound is 352 m/s

    asked on June 5, 2012
  46. physics

    A 50.0kg cyclist on a 10.0kg bicycle speeds up from 5.0m/s to 10.0m/s , the total kinetic energy before acceleratingis 750, and after acceleratingis 3000, how much work is done to increase the kinetic energy of the cyclist and the bicycle

    asked on April 27, 2012
  47. college physics

    A commuter backs her car out of her garage with a constant acceleration of 1.20 m/s2. (a) How long does it take her to reach a speed of 1.60 m/s? s (b) If she then brakes to a stop in 0.8 s, what is her (constant) deceleration?

    asked on January 23, 2014
  48. chem

    What volume of benzene (C6H6,d=0.88g/ml,molar mass=78.11g/mol) is required to produce 1.5 x 10^3 kJ of heat according to the following reaction?

    asked on November 18, 2013
  49. math

    The function f(x) = ax^3-x^2+bx-24 has three factors. Two of these factors are x-2 and x+4. Determine the values of a and b, and then determine the other factor

    asked on October 7, 2012
  50. physics

    A boy fires a 60 g pebble with his slingshot. The pebble leaves the slingshot at 35m/s How high above the slingshot will the pebble rise if it's fired straight up?

    asked on May 8, 2012
  51. math

    determine the value of k such that g(x)=3x+k intersects the quadratic function f(x)=2x^2-5x+3 at exactly one point determine the value(s) of k such that the linear function g(x)=4x+k does not intersect the parabola f(x)=-3x^2-x+4

    asked on October 24, 2011
  52. Chemistry

    Ethanol burns to produce 1300.0 kJ/mol and has a heat capacity of 65.6 J/mol·K. If Dr. Porter has 1.00 L of liquid ethanol (density = 0.789 g/mL), what is the minimum mass of fuel that should be removed and burned to heat the remaining ethanol from 25 °C

    asked on November 9, 2010
  53. Chemistry

    In the following reaction, first find how many oxygen molecules would be used to completely react with 230 grams of pentyl alcohol (C5H11OH)? Then, if exactly 1.505x10^21 carbon dioxide molecules were formed in this reaction, calculate the grams of water

    asked on November 24, 2017
  54. pre calc

    Formulate but do not solve the problem. Kelly Fisher invested a total of $20,000 in two municipal bonds that have yields of 8% and 9% interest per year, respectively. If the interest Kelly receives from the bonds in a year is $1680, how much did she invest

    asked on January 5, 2017
  55. Chemistry

    Benzene, C6H6, reacts with nitric acid, HNO3. Two products are formed, one of which is water. The second product has a molar mass of 213 grams. The second product is composed of 33.8% carbon, 1.42% hydrogen, 19.7% nitrogen, and 45.1% oxygen. Write a

    asked on April 17, 2015
  56. american government

    judicial review is the power of the american courts to:

    asked on January 21, 2013
  57. Physics

    A sound wave is traveling in warm air when it hits a layer of cold, dense air. If the sound wave hits the cold air interface at an angle of 23 degree angle, what is the angle of refraction? Assume that the cold air temperature is -10 degrees C and the warm

    asked on December 13, 2012
  58. math

    State a trigonometric ratio that is equivalent to each of the following trigonometric ratios Sin 3pie/10 Cos 6pie/7

    asked on November 10, 2012
  59. Physics

    A hydraulic lift is used to jack a 780 kg car 15 cm off the floor. The diameter of the output piston is 15 cm, and the input force is 160 N. a)What is the area of the input piston (in m^2)? b)What is the work done in lifting the car 15 cm? c)If the input

    asked on November 10, 2012
  60. Chemistry- helpp!

    The equation for synthesis of the poisonous gas COCl2 is CO(g) + Cl2(g)COCl2 If 43.2 kJ of energy is evolved when 39.5 g of COCl2 is synthesized, what is the molar enthalpy for this synthesis? THANK YOU!

    asked on November 2, 2010
  61. Chemistry

    Is potassium citrate ionic compound or molecular compound?

    asked on November 28, 2009
  62. history

    which factors in west and east africa allowed their cultures to endure??

    asked on November 7, 2018
  63. Chemistry

    In the following reaction, first find how many oxygen molecules would be used to completely react with 230 grams of pentyl alcohol (C5H11OH)? Then, if exactly 1.505x10^21 carbon dioxide molecules were formed in this reaction, calculate the grams of water

    asked on November 24, 2017
  64. Chemistry

    In the following reaction, first find how many oxygen molecules would be used to completely react with 230 grams of pentyl alcohol (C5H11OH)? Then, if exactly 1.505x10^21 carbon dioxide molecules were formed in this reaction, calculate the grams of water

    asked on November 24, 2017
  65. Geometry

    Can you help me with Always, Sometimes, Never questions?? I have answered all of these, but I am not sure if they are right. 1. The base angle of an isosceles triangle are acute----Always 2. When the altitude and the median are drawn from the same vertex

    asked on May 28, 2013
  66. math concepts and applications

    A rectangle has a length of 6 meters and a perimeter of 20 meters. What is the width of the rectangle? A. 4 meters B. 7 meters C. 14 meters D. 52 meters C ?

    asked on August 15, 2012
  67. physics

    The third resonant length of a closed air column is 75cm . What is the first and second length

    asked on June 5, 2012
  68. physics

    A 60 kg student does 60 push ups in 40s . With each push up , the student must lift 70% of the body mass a height of 40cm off the floor. Assuming two significant digits, calculate the following The work the student does against a force of gravity for each

    asked on April 25, 2012
  69. college algebra

    A rectangle is bounded by the x-and y- axes and the graph of y = -1/2x + 4. a.) Find the area of the rectangle as a function of x. b.) Complete the following table x area 1 2 4 6 7 c.) What is the domain of this function?

    asked on February 28, 2012
  70. economics

    An article in Business Week warned of the dangers of deflation as the collapse of numerous Asian economies was creating worries that Asia might try to “ export its way out of trouble” by oversupplying everything from automobiles to semiconductors.

    asked on February 21, 2012
  71. Math

    a teacher asked her students to think of a number, multiply by 5, and subtract the product from 20 , then she asked them to multiply the resulting difference by the number they first thougt of a) use function notation to express the final answer in terms

    asked on September 22, 2011
  72. Calculus

    If h(t) represents the height of an object above ground level at time t and h(t) is given by h(t)=-16t2+11t+1 find the height of the object at the time when the speed is zero.

    asked on September 13, 2010
  73. Chemistry

    Fungal laccase, a blue protein found in wood-rotting fungi, is 0.390% Cu by mass. If a fungal laccase molecule contains four copper atoms, what is the molar mass of fungal laccase?

    asked on September 11, 2010
  74. math

    A patient has been instructed to take 15ml of alumina and magnesium oral suspension every other hour for four doses daily. How many days will two 12 oz bottles last?

    asked on March 1, 2008
  75. physics

    The center of a 4.0 kg sphere and a 7.5 kg sphere are separated by a distance of 1.5 m where is the center of mass of the two sphere system

    asked on February 4, 2008
  76. physics

    A skier coasts down a very smooth 10-m high slope. if the speed of the skier on the slope is 5.0-m/s what is his speed at the bottom of the slope?

    asked on January 26, 2008
  77. Chem 205

    A solution of ammonia and water contains 3.50×1025 water molecules and 9.00×1024 ammonia molecules. How many total hydrogen atoms are in this solution? Any help would be appreciated, thank you!

    asked on September 11, 2016
  78. Math

    If 5X + x squared > 100 then x is not equal to

    asked on July 16, 2015
  79. college physics

    a) A light-rail commuter train accelerates at a rate of 1.25 m/s2. How long does it take it to reach its top speed of 80.0 km/h starting from rest? (b) The same train ordinarily decelerates at a rate of 1.75 m/s2. How long does it take to come to a stop

    asked on January 25, 2014
  80. Physics

    Light with a wavelength of 500 nm (5. 10-7 m) is incident upon a double slit with a separation of 0.44 mm (4.40 10-4 m). A screen is located 2.1 m from the double slit. At what distance from the center of the screen will the second dark fringe beyond the

    asked on April 5, 2013
  81. physics

    The first resonant length of a closed air column occurs when the length is 30.0cm . What will the second and third resonant lengths be

    asked on June 5, 2012
  82. physics

    A 200m dash along a straight track was timed at 21.1 s by a timer located at the finish line who used the flash from the starters pistol to start the stopwatch. If the air temperature was 30.0c , what would the time have been if the timer had started the

    asked on May 20, 2012
  83. Physics

    how does the slope of a Ff-Fg graph relate to the coefficients of friction , prove it mathematically.

    asked on April 12, 2012
  84. physics

    If you were asked to design a capacitor in which small size and large capacitance were required, what factors would be important in your design?

    asked on February 27, 2012
  85. Precalculus

    Which of the following is a solution for the equation 1/485tan^2x = 0? a) pi b) pi/2 c) 485pi d) no solution Which of the following is NOT a solution to the equation 4sin^2x = 1 for 0≤x≤2pi? a) 30 degrees b) 210 degrees c) 150 degrees d) 120 degrees?

    asked on January 27, 2012
  86. math

    a student plants a seed, after the speed sprouts the student monitors the growth of the plant by measuring its height every week, the height after each of the first tree wees was 7mm , 20mm, and 33mm, respectively, if this pattern of growth continuesinwhat

    asked on January 3, 2012
  87. Math( help please ! )

    The profit p(x) of a cosmetics company , in thousands of dollars,is given by p(x)=-5x^2+400x-2550, where x is the amount spent on advertising , in thousands of dollars a) determine the max profit the company can make b)Determine the amount spent on

    asked on October 17, 2011
  88. spanish

    do any of these words have accents? (if so please identify them): - abrigo - rapido - sabado - vez - menu - operacion - impermeable - ademas - regatear - antipatico - farmacia - esqui - pension - pais - perdon

    asked on February 17, 2011
  89. Chemistry

    Calculate the molar solubility of MgF2 in 0.08M MgCl2 at 25 degrees C.

    asked on February 8, 2011
  90. Chemistry

    convert: 450m/s to m/h? please show exact steps

    asked on August 24, 2009
  91. chemistry

    what is the electron configuration of a calcium atom whose atomic number is 20

    asked on January 7, 2009
  92. chemistry

    the half-life of polonium-218 is 3.0 minutes. what percentage of the original sample remains after 4 half-lives?

    asked on December 10, 2008
  93. chemistry

    explain why some numerical values have an unlimited number of significant digits

    asked on October 22, 2008
  94. Delay of Gratification

    Which of the following illustrates the concept of delay of gratification? a. preferring $500 now rather than $1,000 dollars one year from now b. preferring $1,000 one year from now rather than $500 now c. preferring a 1-in-1,000 chance at $10,000 rather

    asked on October 22, 2007
  95. accounting

    The Delicious Cake Factory owns a building for its operations. Delicious uses only half of the building and is considering two options that have been presented to them. The Candy Store would like to purchase the half of the building that is not being used

    asked on June 29, 2008
  96. Microeconomics

    If a firm has a U-Shaped long-run average cost curve, a.) its fixed cost rises as output rises. b.) it must have increasing returns to scale at low levels or production and decreasing returns to scale at high levels of production. C.) it must have

    asked on October 30, 2006
  97. Chemistry

    How many grams of KI are in 25.0 ml of a 3.0% (m/v) solution?

    asked on October 29, 2019
  98. Physics

    A rugby player passes the ball 6.78 m across the field, where it is caught at the same height as it left his hand. (Assume the player is facing the +x direction.) (a) At what angle (in degrees counterclockwise from the +x-axis) was the ball thrown if its

    asked on September 15, 2017
  99. Math

    In how many ways can a subcommittee of six be chosen from a Senate committee of four Democrats and six Republicans if (a) All members are eligible? (b) The subcommittee must consist of two Republicans and four Democrats?

    asked on January 10, 2017
  100. Algebra

    Separate 51 into 2 parts so the second part is 3 more than twice as large as the first part

    asked on November 14, 2016


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