Questions Asked on
February 22, 2013

  1. algebra

    Can someone check my answers please and if Im wrong please explain. 1) graph 4x^2+4y^2=64. what are the domain and range? domain;all real numbers range;-4

    asked by lee
  2. chemistry

    a sample of glucose, c6h12o6 contains 2.03*10^21 atoms of carbon. (a)how many atoms of hydrogen does it contain? (b)how many molecules of glucose does it contain? (c)how many moles of glucose does it contain? (d)what is the mass of this sample in grams?

    asked by rose
  3. Physics urgent

    An archer shoots an arrow with a velocity of 45.0m/s at an angle of 50.0degrees with the horizontal.An assistant standing on the level ground 150m downrange from the launch point throws an apple straight up with the minimum intial speed necessary to meet

    asked by Sammie
  4. Analytical Chemistry

    Carbon dioxide dissolves in water to form carbonic acid, which is primarily dissolved CO2. Dissolved CO2 satisfies the equilibrium equation. CO2(g) CO2(aq) The acid dissociation constants listed in most standard reference texts for carbonic acid actually

    asked by Sam
  5. algebra

    A few more question Id like for someone to check please. 1) what are the vertex, focus, and directrix of the parabola with the given equation? x^2-8x-28y-124=0 vertex (4,-5) focus (0,7) directrix y=-12 2) write an equation of a circle with given center and

    asked by lee
  6. Analytical Chemistry

    Phosphoric acid is a triprotic acid with the following pKa values: pka1: 2.148 pka2: 7.198 pka3: 12.375 You wish to prepare 1.000 L of a 0.0100 M phosphate buffer at pH 7.45. To do this, you choose to use mix the two salt forms involved in the second

    asked by Sam
  7. Math

    I need help on the worksheet of what do you get if a bunch of bad guys fall into the ocean worksheet. I don't want the answer I want help on the problems.

    asked by Aileen
  8. Chemistry

    At 25 degrees celsius and 775 Torr, carbon dioxide has a solubility of 0.0347 M in water. What is the solubility at 25 degrees celsius and 1830 Torr

    asked by alyla
  9. calculus

    A circular swimming pool has a diameter of 14 m, the sides are 4 m high, and the depth of the water is 3.5 m. (The acceleration due to gravity is 9.8 and the density of water is 1000 .) How much work (in Joules) is required to: (a) pump all of the water

    asked by Anonymous
  10. science

    The mean weight of 500 male students at a certain college is 151 pounds (lb), and the standard deviation is 15 lb. Assuming that the weights are normally distributed, find the probability of students weight (a) between 121 and 155 lb (b) more than 185 lb.

    asked by suhad
  11. Chemistry

    pKa1 = 2.148, pKa2 = 7.198, pKa3 = 12.375 You wish to prepare 1.000L of a 0.0100M Phosphate buffer at pH7.55. To do this, you choose to use mix the two salt fomrs involved in the second ionization, NaH2PO4 and Na2HPO4, in a 1.000L volumetric flask and add

    asked by Alba
  12. math

    Kevin plotted a linear equation on a graph with 18 as the y-intercept. Which of the following could be the equation plotted by Kevin?

    asked by hi
  13. chemistry

    the mass of 2.50 mol of a compound with the formula ECl4, in which E is a nonmetallic element, is 385g. what is the molar mass of Ecl4? what is the identity of E?

    asked by rose
  14. Physics

    Three charges (q1=1 μC, q2=−2 μC, q3=3 μC) are located at the corners of an equilateral triangle with sides of length one meter. The 3 μC charge is: Repelled by q1 and attracted by q2. Attracted by q1 and repelled by q2. Attracted by both q1 and q2.

    asked by P
  15. math

    Melissa and her friends are stretching rubber bands for an activity in class. Melissa stretched her elastic to 10 inches. Juan stretched it 3 1/2 times as far. Sara stretched it 4/4 as far. Marsha stretched it 2/5 as far. Put the students in order of how

    asked by jared
  16. Chemistry

    A helium balloon contains 0.54g of helium. Given the molecular weight of helium is 4.0 g/mol, how many moles of helium does it contain?

    asked by Mira
  17. Trigonometry

    An observer on a cliff 1000 dm above sea level sights two ships due east. the angles of depression of the ships are 44o and 32o. Find the distance between the ships.

    asked by Need help really fast!
  18. Helpppp

    Find the apr to the nearest half percent for the following loan Amount financed $3400 Finance charge $470 Number of monthly payments 36 Please help

    asked by Kate
  19. Geometry - please help - reflections

    A laser is shot from vertex A of square ABCD of side length 1, towards point P on BC so that BP = 3/4. The laser reflects off the sides of the square, until it hits another vertex, at which point it stops. What is the length of the path the laser takes?

    asked by Knights
  20. Math 0098

    Last year, Deon had $20,000 to invest. He invested some of it in an account that paid 6% simple interest per year, and he invested the rest in an account that paid 10% simple interest per year. After one year, he received a total of $1880 in interest. How

    asked by Jazz
  21. physics

    Carl Lewis set a world record for the 100.0-m run with a time of 9.86 s. If after reaching the finish line, Mr. Lewis walked directly back to his starting point in 90.9 s, what is the magnitude of his average velocity for the 200.0m?

    asked by Pearl
  22. Help please with reflection problem!?

    A laser is shot from vertex A of square ABCD of side length 1, towards point P on BC so that BP = 3/4. The laser reflects off the sides of the square, until it hits another vertex, at which point it stops. What is the length of the path the laser takes?

    asked by Knights
  23. physics

    The drawing below shows a person who, starting from rest at the top of a cliff, swings down at the end of a rope, releases it, and falls into the water below. There are two paths by which the person can enter the water. Suppose he enters the water at a

    asked by A
  24. Math question?

    Calculate the length of the diagonal for the given rectangular prism. It says length hight width but in the lesson it says length hight deph how to i find the diagonal example

    asked by alex
  25. science

    The acceleration of gravity on the surface of Venus is 8.9m/s^2. Would a ball thrown upward on Venus return to the ground sooner or later than a ball thrown upward with the same speed on the earth?

    asked by jake
  26. physics

    A wooden crate weighs 780 lb. What force is needed to start the crate sliding on a wooden floor when the coefficient of starting friction is 0.40?

    asked by J
  27. math

    Kevin plotted a linear equation on a graph with 18 as the y-intercept. Which of the following could be the equation plotted by Kevin?

    asked by hi
  28. science

    In seed plants, what is an important difference between gymnosperms and most angiosperms? A)Gymnosperms rely on animals to carry pollen from the female gametophyte to the male gametophyte, while angiosperms rely on wind. B)Gymnosperms require water for

    asked by Corie
  29. math

    In a certain high school class, consisting of 60 girls and 40 boys, it is observed that 24 girls and 16 boys wear eye glasses, if a student is picked at random from this class. What is the probability that student picked at random is a boy, what is the

    asked by suhad
  30. Math

    I need help on the worksheet of what do you get if a bunch of bad guys fall into the ocean worksheet. I don't want the answer I want help on the problems.

    asked by Aileen
  31. literacy

    The broadest type of search, which looks for your terms any where , is a/an . A. title B. keyword C. auther D. subject my answer c

    asked by Kim
  32. Life Skills

    The Civil War was an example of which type of conflict? a. interpersonal b. intrapersonal c. intergroup d. intragroup I believe its C, is that correct?

    asked by Cheryl
  33. Physics urgent pls!

    A ball is tossed from an upper-storey window of a building.The ball is given an initial velocity of 8 m/s at an angle of 20 degrees below the horizontal.it strikes the ground 3s later .(a) How far horizontally from the base of the building does the ball

    asked by Sammie
  34. math

    Kevin plotted a linear equation on a graph with 18 as the y-intercept. Which of the following could be the equation plotted by Kevin?

    asked by hi
  35. Math

    From 5 statisticians and 6 economists, a committee consisting of 3 statisticians and 2 economists is to be formed. How many different committees can be formed if: a. two particular statisticians must be in the committee? b. one particular economist cannot

    asked by Therese
  36. Physics

    A particle of mass 6.80 10-8 kg and charge 4.4-µC is traveling due east. It enters perpendicularly a magnetic field whose magnitude is 29.0 T. After entering the field, the particle completes one-half of a circle and exits the field traveling due west.

    asked by Elizabeth
  37. math

    several freshmen tried out for the school track team. after round 1, 1/2 of the freshmen were eliminated. After round 2, 1/3 of those remaining were eliminated. After round 3, 1/4 of those remaining were eliminated. After round 4, 1/5 of those remaining

    asked by shirley
  38. chemistry

    0.50g of a mixture of K2c03 and Li2c03 requires 30ml of a 0.25N hcl solution for neutralization. What is the percentage composition of the mixture? The answer k2c03 96% Li2c03 4% K2c03 weight 138g/mol 138/2 = 69 Li2c03 weight 74g/mol 74/2 = 37 30ml x 0.25N

    asked by Fai
  39. chemistry

    the mass of 2.50 mol of a compound with the formula ECl4, in which E is a nonmetallic element, is 385g. what is the molar mass of Ecl4? what is the identity of E?

    asked by rose
  40. Physics

    Two electrons are separated by 1 meter. What is the ratio of the magnitude of the electric force on one electron and the gravitational force on that electron due to the other electron? The charge of an electron is 1.6×10−19C and its mass is

    asked by P
  41. CHEMISTRY

    WHAT IS THE MEANING OF THE NUMERICAL REPRESENTED BY X IN THE GENERAL FORMULA FOR HYDRATE; SALT H2O?

    asked by PHILASANDE
  42. Calculus

    Question 1. A stuntman falls from a hot air balloon that is hovering at a constant altitude,100 feet above a lake. A television camera on shore, 200 feet from a point directly below the balloon,follows his descent. At what rate is the angle of elevation,

    asked by Kevin
  43. chem

    if a sample of iron(III) oxide contains 22.56g of iron, what is the mass of the sample? do u just find the molar masses?

    asked by rose
  44. chemistry

    how many grams of CO2 can be formed by the complete combustion of a 14.7 sample of C2H6 that is 92.4% pure?( assume the impurities contain no carbon)

    asked by rose
  45. Physics

    A car is traveling at 44.4 km/hr on flat highway. If the coefficient of friction between road and tires on a rainy day is 0.114, what is the minimum distance in which the car will stop?

    asked by Anonymous
  46. Chem

    Calculate the mass percent composition of C,H, O and in aspirin. Express your answers using two significant figures. Enter your answers numerically separated by commas.

    asked by Mira
  47. chemistry

    use the following data to calculate the mean bond enthalpy values for the C-H and C-C bonds. CH4(g)-C(g) + 4H(g) standard enthalpy change is +1648 kj/mol C2H6(g)-2C(g) + 6H(g) standard enthalpy change is +2820 kj/mol

    asked by Bliss
  48. math

    I have to put these in order from greatest to least without multiplying? 6x 2/5, 3 2/3x 2/5, 2/7x2/5, 2/2x2/5 I think this is correct the way it is am I right?

    asked by jared
  49. Physics

    A 4.10 kg mass, m, on a frictionless table is moving in a circle with radius 0.390 m at a constant speed. m is attached to a 5.00 kg mass, M, by a cord through a hole in the table. Find the speed with which m must move for M to stay at rest.

    asked by Audrey Riegel
  50. Physics

    A test car travels in a straight line along the axis. The graph in the figure shows the car's position as a function of time

    asked by Dani
  51. chemistry

    A sample of liquid consisting of only C,H and O and having a mass of 0.5438g was burned in pure oxygen and 1.039g of CO2 and 0.6369g H2O were obtained. what is the empirical formula of the compound?

    asked by rose
  52. Math

    If you have one $50 bill, one $20 bill, one $10 bill and one $100 bill, how many possible sums of money consisting of three bills each, can be formed?

    asked by Therese
  53. Math

    From 5 statisticians and 6 economists, a committee consisting of 3 statisticians and 2 economists is to be formed. How many different committees can be formed if: a. two particular statisticians must be in the committee? b. one particular economist cannot

    asked by Therese
  54. Guidance and Discipline

    Which one of the following ideas will NOT help children to feel personal ownership in their classroom?

    asked by Sandra
  55. Physics

    A plane is flying at 25 degrees north of west at 190km/ h. Suddenly there is a wind from 15degrees north of east at 45 km/ hr. what is the planes new velocity with respect to ground in standard position

    asked by Dan
  56. world geography

    1. The natural vegetation regions of sub-Saharan Africa A. are heavily impacted by human activity. B. don't correspond closely to climatic regions. C. only correspond to climatic conditions in areas of West Africa. D. are all characteristic of equatorial

    asked by Dale
  57. Engineering Maths

    help solving the ffg. differential equation: dy/dx +ytanx=y^3sec^4x

    asked by Taldil
  58. Math ASAP

    Bonnie has a rectangular photographic print that is 5 inches wide and 7 inches long. If she multiplies both the length and width by 1.5, how will the perimeter of the print increase?

    asked by alex
  59. trig

    (sec^2x-1)(csc^2x-1)=1 prove the following identity ive been stuck on this for hours please help

    asked by Anonymous
  60. comm156

    Create an outline that includes details that support your thesis. Outline only the body of your paper. Remember to avoid bias to strengthen your writing (that is, present a balanced case for your thesis). Explain in a short paragraph why you decided to

    asked by rosita
  61. English

    Bret Harte "Plain Language from Truthful James" 1. What was the major theme in this poem? 2. What can we learn from the characters in the poem about the people of this time period. 3. What lesson can be learned from the plot if this poem. 4. What message

    asked by Anonymous
  62. english 4 AP

    I have an essay due and I cannot really understand the topic im supposed to write about. Its about the novel "sense and sensibility" Many plays and novels that focus upon the courtship or marriage of a man and a woman include a second pair who help to

    asked by kaliegh
  63. PHYSICS 2

    The antenna broadcasts radio signals at the resonant frequency of the tank circuit. Suppose that a certain tank circuit in a shortwave radio transmitter has a fixed capacitance of 1.8 x 10-11 F and a variable inductance. If the antenna is intended to

    asked by Please HELP
  64. science

    A force of 20 N gives an object an acceleration of 5m/s^2. (a) What force would be needed to give the same object an acceleration of 1m/s^2? (b) What force be needed to give it an acceleration of 10m/s^2?

    asked by jake
  65. Guidance and Discipline

    Which one of the following ideas will NOT help children to feel personal ownership in their classroom?

    asked by Sandra
  66. PHYSICS

    You have a coil with 20 loops inside a magnetic field generator that is temporarily generating a field that has a rate of change of -0.25. The other end of this coil is wrapped around a core with 15 turns. How many turns must a second coil wrapped around

    asked by william mclaren
  67. Science

    If the competing equilibria are ignored, does that mean the value of their equilibrium constant cant be calculated?

    asked by Ahmad M
  68. Nsuk

    (1)calculate the heat energy datas temperatures 100degree celciuse and 4degree celciuse,mass 0.5kg take latent heat of vapourisation 2.02times10raised to the power of minus6.(2)calculate the specific latent heat of fusion mass of calorimeter 0.01kg and

    asked by Saen
  69. Algebra 1

    The first of three pipes fills a tank in 12 minutes and a second pipe in 10 minutes. If both these pipes and also a third pipe are open the tank is filled in 4 min. How many minutes will the third pipe alone require to fill the tank? My teacher told me to

    asked by NEED HELP NOW!!
  70. Math 0098

    Last year, Joe had to invest. He invested some of it in an account that paid simple interest per year, and he invested the rest in an account that paid simple interest per year. After one year, he received a total of in interest. How much did he invest in

    asked by Jazz
  71. Chem

    Calculate the mass percent composition of C,H, O and in aspirin. Express your answers using two significant figures. Enter your answers numerically separated by commas.

    asked by Mira
  72. Physics

    True or False. When non-conservative forces are present, the amount of work done increases with the length of the path.

    asked by Anonymous
  73. physics

    An aircraft in a straight line with a constant speed of 450km.h ,What is the magnitude of the resultant force acting on the aircraft?

    asked by rose
  74. math

    A jar had 16 marbles 4 are red . One marble is drawn and not replaced. Then s second marble is drawn . What is the probability of selecting a red marble and then another red marble?

    asked by mary jackson
  75. Math

    In how many ways can a group of 10 people be divided into: a. two groups consisting of 7 and 3 people? b. three groups consisting of 4, 3, and 2 people?

    asked by Therese
  76. physics

    A girl whirls a stone in a horizontal circle 1.5 m above the ground by means of a string 141 cm long. The string breaks, and the stone flies of horizontally and strike the ground 13.6 m away. What is the centripetal acceleration of the stone while in

    asked by Robert
  77. Biology

    What results in the combination of the haploid sets of chromosomes from two individuals into a diploid zygote

    asked by Candy
  78. chemistry

    Biphenyl, C12H10, is a nonvolatile, nonionizing solute that is soluble in benzene, C6H6. At 25 °C, the vapor pressure of pure benzene is 100.84 torr. What is the vapor pressure of a solution made from dissolving 11.1 g of biphenyl in 29.1 g of benzene?

    asked by Anonymous
  79. maths

    A sum of Rs100 is invested at 8%. Simple interest per annum. Calculate the interest at the end 1,2,3.....years.

    asked by Anonymous
  80. graphing

    im not sure how to do this question A student fires a model rocket into the air. The rocket reaches a maximum hieght of 24.8 meters and lands 55 meters from the student. (assume parabola and no wind) a. list three points of trajectory(coordinate pairs) b.

    asked by Anonymous
  81. College math

    Can someone please assist me The problem reads "use the rule of 78 to find the payoff amount for the loan paid in full before the date" Finance charge: $717 Total number of payments 41 Amount per payment $155 Remaining payments when paid in full 10 Please

    asked by Meg
  82. math help!!

    A boat travels down the river in 2.9 hours. The return trip up river takes 3.6 hours. A one way trip down or up river is a distance of 30 miles. If the boat is traveling at maximum speed, what is the boats speed measured in waters with no current? You need

    asked by lilly
  83. math

    9 men build a house in a working 4 days .how many workmen ,working at the same rate willbe needed to build a house in 3 days

    asked by bamogopa
  84. physics

    a particle of mass(m) attack to a string of length (r) b wave round in a circle with speep(b) fine the form of the expression for the tension the string

    asked by Anonymous
  85. physics HELP!

    A container holds 1.3 mol of gas. The total average kinetic energy of the gas molecules in the container is equal to the kinetic energy of a 6.7x10-3 kg bullet with a speed of 830 m/s. What is the Kelvin temperature of the gas?

    asked by Ashley
  86. Patho - Hyperkalemia and Heart Attacks

    Could someone please explain why an increase in potassium would cause a decrease in HR? I need someone to really dumb it down for me so I can fully understand. i was thinking that more Ka+ would increase the HR but in my lesson, it said it would slow down

    asked by Lena
  87. Math

    24 m of fencing are available to enclose a play area. what would the maximum area be if the fencing only went on 3 sides because the wall is used as the 4th side. Please show you work

    asked by CJ
  88. Math

    Out of 4 architects, 6 engineers and 9 electricians, how many ways can a group of 6 people be formed to attend a forum if: a. there is an equal number of architects, engineers and electricians b. two particular engineers cannot be in the committee? c.

    asked by Therese
  89. math

    A grocer sell 84 oranges in one day. At the end of the day, the grocer has 1/3 as many oranges as he did at the start of the day. If n=the number of oranges the grocer has left at the end of the day, which of the equations could be used to determine the

    asked by Tonia
  90. Biology

    Which disorder causes a natural immunity to Malaria?

    asked by Candy
  91. Math

    f=8ln(sec(x)+tan(x)) f'=

    asked by jonh
  92. math

    find two consecutive natural number the sum of whose reciprocal is 11/30

    asked by mahi
  93. trig

    What is the length of side c to the nearest whole number if side a 105 and angle A 65 degrees and angle B 37 degrees?

    asked by Anonymous
  94. math

    several freshmen tried out for the school track team. after round 1, 1/2 of the freshmen were eliminated. After round 2, 1/3 of those remaining were eliminated. After round 3, 1/4 of those remaining were eliminated. After round 4, 1/5 of those remaining

    asked by shirley
  95. trig sub question

    Hello, I have a question concerning trigonometric substitution. let's say we have integral of dx/sqrt(9x^2 + 4), so after doing a few steps we have: 2/3 integral of sec0/sqrt((2tan0)^2 + 4*) d0 (the * is for later on) the next step turns into: 2/3 integral

    asked by Tom
  96. Physics

    Find the mass of water that vaporizes when 3.94 kg of mercury at 248 °C is added to 0.183 kg of water at 83.0 °C.

    asked by Ashley
  97. Calculus

    F(x) = x^2 sin x F'(x) y= tan x/x^2 y'=

    asked by Amy
  98. math

    The price in dollars of a house during a period of mild inflation is described by the formula P(t)=94000 e0.03 t, where t is the number of years after 1990. Answer the following questions: B. In the year 2000 the value will be increasing at a rate of

    asked by Hannah
  99. history

    Who came to power in China, instituting a Communist regime that would bring great suffering to the nation's people

    asked by melissa
  100. math

    round up 114.29 to nearest cent

    asked by ann
  101. English

    Can someone help me with these questions please. Bret Harte "Plain Language from Truthful James" 1. What was the major theme in this poem? 2. What can we learn from the characters in the poem about the people of this time period. 3. What lesson can be

    asked by bs
  102. Guidance and Discipline

    Which one of the following ideas will NOT help children to feel personal owernership in their classroom?

    asked by Sandra
  103. Physics

    In a series RCL circuit the generator is set to a frequency that is not the resonant frequency. This nonresonant frequency is such that the ratio of the inductive reactance to the capacitive reactance of the circuit is observed to be 4.91. The resonant

    asked by Please HELP
  104. Physics

    Posted by Dan on Thursday, February 21, 2013 at 11:17pm. Plane flying southwest at 155mi/hr. their is a wind from the west at 45.0mi/hr. what's the planes new velocity

    asked by Rick
  105. Dynamics

    It takes 16s to raise a 2800lb car and the supporting 650lb hydraulic car-lift platform to a ht of 6.5 ft. Knowing that the overall conversion efficiency from electric to mechanical power for the system is 82% determine a) the average power output

    asked by Amelia
  106. Engineering Maths

    Pleas help solve the ffg. differential equation: dy/dx-(1+1/x)y=y^2

    asked by Taldil
  107. mechanics of materials

    The change in length of a steel wire under an applied load can be halved by keeping all other conditions constant but using:which of the following is correct A. a different material having a Young's modulus half that of steel B half the cross sectional

    asked by dmkp
  108. math

    a rectangle is 6in wide and 14in tall if it is reduced to a width of 3in then how tall will it be

    asked by Anonymous
  109. Chemistry

    Heyy Jiskha!! I need ur help today:) Hope you will help:D My question is that why is supersaturation unstable... I read the explanations for this on many websites but for some odd reason I just cannot get it to sink in my mind. What does it mean by it is

    asked by Priya
  110. science

    3. In a sample of 64 students given an examination in statistics, it is found that the mean weight is 57 kg with standard deviation 9 kg. Find : Ć i) The proportion of students weight 48-62 kg. Ć ii) The proportion of those less than 72 kg. Ć iii)

    asked by suhad
  111. social studies !

    Hi, i'm the person that asked what are some servants, shopkeepers, or slave in Ancient Rome. What I mean is what are the names of someone that is either a shopkeeper, servant, or slave. That google type of site did not help ! Can you people please help me

    asked by Anonymous
  112. Physics

    A girl whirls a stone in a horizontal circle 1.9 m above the ground by means of a string 111 cm long. The string breaks, and the stone flies of horizontally and strike the ground 11.2 m away. What is the centripetal acceleration of the stone while in

    asked by Ashlyn
  113. NUTRTION AND GENERAL HEALTH

    Which one of the following vegetables provides four important nutrients—vitamin A, vitamin C, folic acid, potassium—and dietary fiber? A.Sweet potatoes B.Carrots C.Spinach

    asked by Hennessey
  114. non permissable values

    i have a hard time understanding the non permissable values could someone please explain. I have solved the following equations but need help determining the values. Also if you could check to see if i did them right it would be alot of help 1.

    asked by Tara
  115. calc

    The price in dollars of a house during a period of mild inflation is described by the formula P(t)=94000 e0.03 t, where t is the number of years after 1990. Answer the following questions: B. In the year 2000 the value will be increasing at a rate of

    asked by Hannah
  116. Algebra 1

    The first of three pipes fills a tank in 12 minutes and a second pipe in 10 minutes.If both these pipes and also a third pipe are open, the tank is filled in 4 minutes. How many minute will the third pipe alone require to fill the tank? Just need an

    asked by NEED HELP NOW!!
  117. Math

    f(x)=x^5x Use logarithmic differentiation to determine the derivative.

    asked by jonh
  118. Biology

    What results in the combination of the haploid sets of chromosomes from two individuals into a diploid zygote

    asked by Candy
  119. maths

    A sum of Rs100 is invested at 8%. Simple interest per annum. Calculate the interest at the end 1,2,3.....years.

    asked by Anonymous
  120. Math

    how would i write out this equation into a simplified experssion using exponents. (81a^8b^4)^1/4

    asked by tina
  121. calculus

    use implicit differentiation to find dy/dx . Then evaluate the derivative function at the designated point. x2y2 − 1= 0;(0.5, 2)

    asked by jimbob
  122. calculus

    use implicit differentiation to find dy/dx . Then evaluate the derivative function at the designated point 2xy2 – y = 10; (1, −2)

    asked by jimdandy
  123. calculus

    use implicit differentiation to find dy/dx . Then evaluate the derivative function at the designated point. log (xy)= 2; (4, 25)

    asked by mark11
  124. college algebra 1111

    solve. 2z^2-7=-48

    asked by Brandi
  125. Algebra

    I am confused on how solve this substitution problem 4y+3=3y+x 2x+4y=18 If you can, show work please (:

    asked by Stephanie
  126. geometry

    abcd is a parallelogram with sides ab=12 cm,bc=10 cm and diagonal ac=16 cm .find the area of the parallelogram also find the distance between its shortest sides

    asked by Anonymous
  127. statistics

    For a population of μ = 70 and σ = 20, find the z-score and percentile rank for each of the following X scores: 80, 100, 65, 40.

    asked by jackee
  128. edu

    Ms. Rook chose to develop her theme of life cycles around The Very Hungry Caterpillar by Eric Carle. She is using a.a thematic inquiry approach b.webbing c.a thematic/literature based approach d.a whole language learning Not sure between b and c i think c

    asked by ray
  129. Algebra 2 ..

    Simplify. 1. Log base 4 of 256^2 IS THE ANSWER 8....IF SO AM I SMART? 2. Log of 45 ^x Is the answer 1.65X? 3. Log base 6 of 12 ^(x+1) Is the answer 1.39x+1.39?

    asked by Anonymous
  130. Biology

    1) What memory system is sensation responsible for? Sensory, short term or long term memory system? Explain. 2) How does encoding memories relate to transfer appropriate processing and fluid intelligence?

    asked by Jasmine
  131. Chem

    The total pressure in a vessel containing hydrogen collected over water at 25.0°C was 0.8 atm. The vapor pressure of water at that temperature is 23.8. what was he pressure of the oxygen in torr?

    asked by Lupe
  132. physics

    A 50 V battery has an internal resistance r. 1 A 50 V r 55 Ω 66 Ω internal resistance What is the value of r? Answer in units of Ω

    asked by Anonymous
  133. Physics

    You have a coil with 20 loops inside a magnetic field generator that is temporarily generating a field that has a rate of change of -0.25. The other end of this coil is wrapped around a core with 15 turns. How many turns must a second coil wrapped around

    asked by william mclaren
  134. Engineering Maths

    please help solve this differential equation: x^3+(y+1)^2 dy/dx=0

    asked by Taldil
  135. physics

    Tony (of mass 75 kg) coasts on his bicycle (of mass 15 kg) at a constant speed of 4 m/s,carrying a 14 kg pack. Tony throws his pack forward, in the direction of his motion, at 6 m/s relative to the speed of bicycle just before the throw.What is the initial

    asked by Anonymous
  136. algebra

    Five (5) years ago, you bought a house for $171,000, with a down payment of $30,000, which meant you took out a loan for $141,000. Your interest rate was 5.75% fixed. You would like to pay more on your loan. You check your bank statement and find the

    asked by mary
  137. mechanics of materials

    4. A metal bar with a cross-sectional area of 50mm2 is subjected to a tensile strain of 0.001. What is the tensile force responsible for the strain given that the material has a Young's modulus of 15GNm raise to the power -2 A 0.003N B 7.5x10 3N C 7.5x 10

    asked by dmkp
  138. mechanics of materials

    An aluminium alloy bar with a Young's modulus of 70GPa is under a tensile stress of 10MPa, Which of thefollowing is the equal to the strain in the bar? A 0.0014 B 7.0x10 3 c 700 D 1.4x10 -4

    asked by dmkp
  139. mechanics of materials

    An aluminium alloy bar with a Young's modulus of 70GPa is under a tensile stress of 10MPa, Which of thefollowing is the equal to the strain in the bar? A 0.0014 B 7.0x10 3 c 700 D 1.4x10 -4

    asked by dmkp
  140. Calculus

    Find the integral of x^2 divided by the square root of (2x-x^2) dx

    asked by Ashley
  141. science

    A toyota engine has an efficiency of 45% and produces 3010J of work. How much heat does the engine reject?

    asked by Davidson
  142. mechanics of materials

    a mild steel bar of length 10cm and width of 10mm is extended by 0.01 mm. Which of the following is equal to the change in width of the bar.(The Poisson's ratio of mild steel is 0.31) A 3.1x10-4mm B -3.1x10-4mm C 3.1x10-5mm D -3.1x10-5mm

    asked by dmkp
  143. mechanics of materials

    A mild steel bar of width 10mm is subjected to a tensile stress of 3,0x105 Pa. Given that Young’s modulus for mild steel is 200 GPa and Poisson’s ration for mild steel is 0.31, calculate the change in width of the bar. Is the width increased or

    asked by dmkp
  144. edu

    Which one of the following would NOT be a typical communication for a three year old ? a."Thats Scary b."I'm hungry c."Nobody likes carrots d.I wan cookies I think c not sure though

    asked by ray
  145. Physics

    A test tube in a centrifuge is pivoted so that it swings out horizontally as the machine builds up speed. If the bottom of the tube is 180.0 mm from the central spin axis, and if the machine hits 54000 rev/min, what would be the centripetal force exerted

    asked by Ashley
  146. physics 203

    a projectile is thrown with initial speed v0=25.0m/2 at an initial angle with the horizontal ANGLE=45 degrees. a. find the time when the projectile is at the maximum height. b. find the position(x,y) at the maximum height. c. at time T, find the components

    asked by ash
  147. Please help on geometry - analytic geometry

    What is the area, in square units, of a triangle whose vertices are at (4,-1), (10,3) and (4,5) ? How to do this?

    asked by Knights
  148. math

    if a person can fill a tank in 12 min. and another person can fill a tank in 20 min. How long will it take both of them to fill 1 tank together?

    asked by shirley
  149. Mathematics

    what geometric figure/shape can we find in enchanted kingdom, rizal shrine in laguna, and in gardenia factory?????? i really need it plz help me T.T

    asked by Elaine
  150. Algebra II

    A line has a slope of 2 and contains the points (1, 3) and (2, y). The value of y is what? Please explain in detail

    asked by Will
  151. health

    A client comes in and asks for a pregnancy test. What do you do?

    asked by Derek
  152. Calculus

    H(x) = (x^4 - 2x +7)(x^-3 + 2x^-4) H'(x)=

    asked by Gary
  153. Algebra 1

    3(n)-2(2n+2)=1/3(n+4) help please, show your work. thank you!

    asked by NEED HELP NOW!!
  154. Calculus

    Find the derivative of f(x) = ln(13e^(5x) + 2)

    asked by Jamie
  155. Math

    Solve for x 5/x-2 + 2/x+5 = 4/x^2+3x-10 not sure i know how to do this

    asked by Angela
  156. physics

    A container holds 1.3 mol of gas. The total average kinetic energy of the gas molecules in the container is equal to the kinetic energy of a 6.7x10-3 kg bullet with a speed of 830 m/s. What is the Kelvin temperature of the gas?

    asked by Ashley
  157. math

    f=(x)cosh^(-1)((x)/(2))-√((x)^(2)-4) f'=

    asked by jonh
  158. math

    if one of the zeros of y=x^2+bx+1 is 1 determine the value of b anyone understand this and can help me break it down

    asked by britnay
  159. Math -algerbra

    can someone show me how to solve an equation algerbracially x=sqrtx+10+2

    asked by anonymous
  160. Math -algerbra

    can someone show me how to solve an equation algerbracially x=sqrtx+10+2

    asked by anonymous
  161. math

    find the greatest common factor of these two expression 18 u^2 v^5 w^3 and 30 u^7 w^4

    asked by mace
  162. Math

    Yusuf can run once around a 400-meter track in 48 seconds. If he could maintain that pace, how many meters would he run in 192 seconds? Write an equation you would use for solving this problem.

    asked by Anonymous
  163. math

    factor the following expression 15 u v w^8+30 u^5 w^9 and factor 36 x^2-y^2 and 7u+7v+v w +wu

    asked by mace
  164. calculus

    y = (sin x) / (1 + tan x)

    asked by Molly
  165. Algebra1

    I have to solve for "x": bx/c=2-cx/b please show your work! Thank you!

    asked by NEED HELP NOW!!
  166. algebra 1

    1/a-y=1/y solve for "y"

    asked by NEED HELP NOW!!
  167. Science

    Proteins found on the outside of cells and viruses are called ____________ , these are used by the body to _______________ pathogens. antigens; help antibodies; make antigens; identify antibodies; reproduce Identify the response below that summarizes the

    asked by Brooke J.
  168. statistics

    What is the standard deviation of 31 sample values with a mean of 2954?

    asked by glenzy
  169. Marine science

    A cylindrical container is 30cm in diameter. If is filled at rest by 20 cm of fresh water, and then spun at 30 rpm. after state of solid body rotation is achieved, what is the difference in level between the rim and the center

    asked by Ahmed Mohammed Ali
  170. math

    the length of a rectangle is 3 yds more than twice it width and the area of the rectangle is 77yds find the dimensions of the rectangle the length and width

    asked by carmen
  171. HISTORY

    HABSBURG VS OTTOMAN

    asked by Anonymous
  172. Physics

    During a circus performance, a 77-kg human cannonball is shot out of an 20-m-long cannon. If the human cannonball spends 0.91 s in the cannon, determine the average net force exerted on him in the barrel of the cannon.

    asked by Ronnica
  173. Math f(x)

    given f(x)= x^2+x and g(x)=2x+1 determine f[g(x)] i don't even know where to start with this question help is much needed

    asked by anna
  174. Biology

    Please Help Quick,Write Out The Balanced Chemical Equation For Respiration In An Athlete In A Race.

    asked by Chris
  175. Math

    y=(4(x)-3)^(2)*(3(x)^(2)+2)^(4) implicated differentiation

    asked by jonh
  176. website

    What is the website that is used to do the diagrams. Its like circles connected to circles in this diagram.

    asked by Celest
  177. Math

    The sum of twice a number and another number is 24. The difference of twice the first number and the other number is 12. Which system would model this situation, and what is the solution?

    asked by tyler
  178. English

    I am having trouble writing my thesis statement on the power of destiny in romeo and juliet. Any suggestions

    asked by Gabby
  179. Math

    find f' of f=(x)cosh^(-1)((x)/(2))-√((x)^(2)-4)

    asked by jonh
  180. english

    Is arranging and changing places an example of assonance?

    asked by Queenie
  181. help asap!!

    Bernie put in a garden in her back yard. The garden has a perimeter of 213 feet. She wants to know the total surface area of the garden and all she knows is the perimeter and that the width is 20% or (1/5) of the length. (Remember 20% and the fraction 1/5

    asked by lilly
  182. information literacy

    what is the best way to incorporate an idea from a journal article into a research paper

    asked by Anonymous
  183. Math

    f=8arctan(6x) f'=

    asked by jonh
  184. statistics

    otorola discovered that the average defect rate for parts produced on an assembly line varies from run-to-run and is approximately normally distributed with a mean equal to 3 defects per million. Assume that the goal at Motorola is for the average defect

    asked by Sandy
  185. Math

    F=tan^(-1)(cos(2x)) F'=

    asked by jonh
  186. English

    What is a rebuttal counterargument?

    asked by Amy
  187. math

    sam, pam, ken, and jen wrote each of their names on a slip of paper and placed them in a bowl.Sam was the first to randomly select a name from the bowl. What is the probability that he will select his own name? express answer as a fraction and a

    asked by sandy
  188. english

    please make corrections if any. John contacted juli and asked whether she received book which he sent through George. Juli said George hasn't given the book. John said George is telling all the persons in a defaming manner that he is distributing the waste

    asked by ramesh reddy
  189. Rioja

    A normally distributed population with 200 elements has a mean of 60 and a standard deviation of 10. The probability that the mean of a sample of 25 elements taken from this population will be smaller than 56 is:

    asked by Laws
  190. math

    A jar had 16 marbles 4 are red . One marble is drawn and not replaced. Then s second marble is drawn . What is the probability of selecting a red marble and then another red marble?

    asked by mary jackson
  191. math

    Five (5) years ago, you bought a house for $171,000, with a down payment of $30,000, which meant you took out a loan for $141,000. Your interest rate was 5.75% fixed. You would like to pay more on your loan. You check your bank statement and find the

    asked by mary
  192. Organic Chemistry

    NMR: What can be said about proton spin decoupling? a) It depends on the number of attached protons. b) It slows the deshielding effects of π -electron circulation. c) It is the same as Distortionless Enhancement with Polarization Transfer. d) It is an

    asked by Student
  193. APA

    I am writing a report in apa and I was not sure if it is okay to ask a rhetorical question in the introduction?

    asked by renee
  194. Calculus

    Find the integral of x times the square root of (400-100x^2)dx

    asked by Ashley
  195. maths

    How many ordered sets of non-negative integers (a,b,c,d) are there such that a+b+c+d=10?

    asked by nothing
  196. social studies !

    Hi, what are some servants, shopkeepers, or slaves in Ancient Rome?

    asked by Anonymous
  197. Math

    2+5+8+11+14+17+20+...........=?

    asked by Clement
  198. Math

    Write a two digit odd number using 5 and 6

    asked by Anonymous
  199. Social Studies

    Ms. Sue, you are so awesome! I know this is not a question, but if you're reading this, I would like to thank you for all the help you have given. You are a wonderful teacher :)

    asked by Hello World
  200. Algebra 1

    Find three consecutive even numbers such that the difference between 3 times the first number and twice the second number is 1/3 the third number. also, my teacher told me to use an equation.

    asked by NEED HELP NOW!!
  201. Math

    In the sequence below, each shaded triangle, after the first is 1/4 the area of the preceding shaded triangle. What is the ratio for the shaded area of the 5th triangle?

    asked by Crystal
  202. Calculus

    y= (t^3 + t)/(t^4 - 2) y'=

    asked by Terry