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Questions Asked on
December 7, 2014

  1. Chemistry

    estimate Delta H for the following reaction C2H4 (g)+3O2(g)→2 CO2(g)+2 H2O(g) So we have (4) C-H bonds and (1) C=C bond or (H = 4*414 + 615= 2271) For oxygen, (3) O=O bonds or (H = 3*502=1506) 2CO2 is (2) O=C=O (H=730*4=2920) 2H2O is (2) H-O-H or

    asked by Mahnoor

  2. Chem

    Determining oxidation numbers for remaining atoms in HIO3, H3PO4, Ba(OH)2, and BaPO4 I have no idea if I am doing this right I don't even know how to do this For HIO3 I added the charges as +1 and 3(-2) which i got -5 then I did it the similar way for the

    asked by Feather

  3. Healthcare

    How does the law protect patient rights in managed care?

    asked by Jackie

  4. Chemistry

    Vitamin K is involved in normal blood clotting. When 2.32 g of vitamin K is dissolved in 25.0 g of camphor, the freezing point of the solution is lowered by 7.78 °C. The freezing point and Kf constant for camphor can be found here. Calculate the molar

    asked by Abdul

  5. Psychology

    Hello, I am in need of help with a psychology question. Here is the information that was provided: Psychologists use field observations, laboratory experiments, and other methods to gather data relevant to their research questions. When sufficient data

    asked by Meredith

  7. Physics

    A sign that weighs 670N is mounted at the end of a 2.00-m long rod of negligible weight. The supporting cable is connected at angle theta=30deg to the center of the rod. What is a) the tension T in the supporting cable, and b) the horizontal and vertical

    asked by Stephanie

  8. Economics help

    Does an IPO seem like a good idea for a business? What kind of things would you say in an SEC statement to demonstrate that your business? So would I say that the business is very successful and on its way in expanding?

    asked by Carey

  9. math 104

    A rocket engine, 2.44 cross product 10−5 watts/cm2

    asked by Anonymous

  10. Maths

    In figure A and B are on the same side of line L. AD perpendicular to l and BE perpendicular to l. If C is the midpoint of AB proove that CD = CE.

    asked by Sarsi

  11. problem solving

    lily estimate that she was able to answer correctly 35 question out of 40 questions in a test. however, she only scored 75% for the test. find the difference between the actual number of questions that answer correctly and the estimated number of question

    asked by adek

  12. problem solving

    speed of the car is 47.52 km/hr. a lorry wheel is rotating at 400 RPM. what is radius (in cm) of a lorry wheel has a same speed with the car.

    asked by adek

  13. chemistry

    What is the volume of solution prepared when 6g of acetic acid is dissolved to prepare 0.25M solution

    asked by Ahmad ali

  14. problem solving

    a landscaper bought some decorative cement blocks from a landsccaping supplier. the supplier charged 5% sales tax and the total came to $315. without the tax, the landscaper could have bought 6 more blocks for the same total cost. how many blocks did the

    asked by adek

  15. problem solving

    a landscaper bought same decorative cement blocks from a landscaping supplier. the supplier charged 5% sales tax and the total came to $315. without the tax, the landscaper could have bought 6 more blocks for the same total cost. how many blocks did the

    asked by adek

  16. problem solving

    lily estimate that she was able to answer correctly 35 question out of 40 questions in a test. however, she only scored 75% for the test. find the difference between the actual number of questions that answer correctly and the estimated number of question

    asked by adek

  18. problem solving

    speed of the car is 47.52 km/hr. a lorry wheel is rotating at 400 RPM. what is radius (in cm) of a lorry wheel has a same speed with the car

    asked by adek

  19. math

    how long is the groove on one side of a long play(33 1/3 rpm) phonograph record? assume there is a single recording and the author (beginning) groove is 5.75 inches from the center and the inner(ending) groove is 1.75 inches from the center. the recording

    asked by kakak

  20. problem solving

    a nine digit number is formed using each of the digit 1,2,3,...,9 exactly once. for n= 1,2,3,...,9,n divides the first n digits of the number. find the number.

    asked by kakak

  21. problem solving

    suppose one had 100 yards of fencing to enclose a garden. What shapes could be enclosed? What are the dimensions of each and what is the area? make a chart.

    asked by kakak

  22. problem solving

    what triangular region with p=100 has the most area? find all five triangular regions with p=100 having integer side and integer area . such as 29,29,42

    asked by kakak

  23. Math word problem

    Jeremy has 19 coins of 2 different values. the total value of the coins is $1.00. What are the coins? How many of each coin does he have?

    asked by Max

  24. physics

    a metre ruler balances itself at 58 cm mark when a weight of 20 gf is suspended from one end. what is tge weight of the metre ruler?

    asked by saikat

  25. Advance Algebra

    The concentration (in milligrams per liter) of an antibiotic in the blood is given by the geometric series: A + Aekt + Ae2kt + + Ae(n − 1)kt where A is the number of milligrams in one dose of the antibiotic, n is the number of doses, t is the time

    asked by Karen

  26. ashford university

    Theories of personality wk 1 assignment I don't understand it

    asked by Anonymous

  27. solve

    A long distance trucker traveled 168 miles in one direction during a snow storm. The return trip in rainy weather was accomplished at double the speed and took 3 hours less time. What is the speed going?

    asked by Anonymous

  29. physics

    Newton first law provides the measure of ???

    asked by Rahul

  30. physics

    Define Newton's first law .

    asked by Rahul

  31. Science

    What will be the effect on litmus paper when methyl amine is used?

    asked by Affie

  32. physics

    : stand with one arm and side of one foot pressed agaonst a wall.can you raose the other leg side ways? if not,why not

    asked by aliya

  33. science

    Baseball of 0.15 kg is thrown upward at an initial velocity of 35 m/s . tow seconds later a 20 g bullet is fired at 250 m/s into the rising baseball . How high will the combined bullet and baseball rise

    asked by ssn

  34. Math

    (6.3 * 10^2)^-6 1/(6.3 * 10^2)^6 (divide and the sign flips to a positive value) On the calculator I get 1.59 * 10^-17 I have no idea how though it is correct

    asked by Norma

  35. Math

    solve 7 1/2 - 3 5/6

    asked by Math

  36. math please help

    The following data represent the asking price of a simple random sample of homes for sale. Construct a 99% confidence interval with and without the outlier included. Comment on the effect the outlier has on the confidence interval. Here is the information:

    asked by LADO

  37. social studies

    1. which of the following staments would describe a reason why the confederation government was unable to help georgia solve its problems with the indians? it was too busy fighting foreign wars. the president would veto any action it took. it was a week

    asked by someone help i am new

  38. Physics

    A 24g ball of clay traveling east at 3.3m/s collides with a 33g ball of clay traveling north at 2.4m/s . 1a)What is the movement direction of the resulting 57g blob of clay? 1b)What is the speed of the resulting 57g blob of clay?

    asked by Angelica

  40. Physics

    A spaceship of mass 2.0×106kg is cruising at a speed of 4.6×106m/s when the antimatter reactor fails, blowing the ship into three pieces. One section, having a mass of 5.2×105kg , is blown straight backward with a speed of 2.2×106m/s . A second piece,

    asked by Robbie

  41. Math

    Find the valu eof accros (5/6). Then, round your answer to four decimal places. I know that the answer is 0.5856 but how would I round that? Thanks!

    asked by Penny

  42. Math

    Find the exact value: 1.) cos^-1(sin(pi/2)) 2.) arccos(cos(7pi/2))

    asked by Tori

  43. ethic

    Disloyalty, greed, merciless mess prejudice, and intolerance are examples of

    asked by tony

  44. physics

    A contestant in a winter games event pushes a 41.0 kg block of ice in the positive direction across a frozen lake as shown in the Figure (a). The coefficient of static friction is 0.1 and the coefficient of kinetic friction is 0.03.

    asked by mathew

  45. Chemestry

    To fnd the empirical formula i have to convert the percent in g first, or a take the date in percent?

    asked by Ana

  46. ALG 1

    Identify the GCF of 12a4b3 + 8a3b2

    asked by DORON

  47. trigonometry

    At a swim meet, a parent is videotaping his son from a seat in the stands that is 20 meters past the starting line and 8 meters away from his son's lane. Let x represent the distance the son has swum. a. Write x as a function of (theta). b. At what angle

    asked by Nick

  48. Physics

    As part of a safety investigation, two 1200kg cars traveling at 24m/s are crashed into different barriers. Find the average force exerted on the car that hits a concrete barrier and takes 0.16s to stop.

    asked by Becca

  49. Calculus

    Lines tangent to the curve y-1=2x^2+3x pass through the point A(2,-1). Find the x-coordinate(s) of the point(s) of tangency. The answer is 2+2^1/2, 2-2^1/2, I just don't know how to get there. Please help! Thank you!

    asked by Ty

  51. Math

    Below is a table showing the cost lawn maintenance service charges for various commercial and retail properties. Cost of lawn maintenance ($) 640, 250, 500, 640, 720, 640, 250, 720 A. Find the mean absolute deviation for the lawn maintenance company B.

    asked by Suzy

  52. Math

    At a swim meet, a parent is videotaping his son from a seat in the stands that is 20 meters past the starting line and 8 meters away from his son's lane. Let x represent the distance the son has swum. a. Write x as a function of (theta). b. At what angle

    asked by Lindsey

  53. ilays high school

    what is a volume 2 mole of hydrochloric acid will neutralize 25 cent meter cubic of sodium carbonate solution

    asked by dalmar falaash

  54. chemisty

    convert .98L of N20 gas at STP to moles

    asked by Iestyn

  55. Chemistry

    estimate Delta H for the following reaction C2H4 (g)+3O2(g)→2 CO2(g)+2 H2O(g) So we have (4) C-H bonds and (1) C=C bond or (H = 4*414 + 615= 2271) For oxygen, (3) O=O bonds or (H = 3*502=1506) 2CO2 is (2) O=C=O (H=730*4=2920) 2H2O is (2) H-O-H or

    asked by Anon

  56. math

    A medical researcher wanted to determine the effect of pH (a measure of alkalinity or acidity, with pure water having a pH of 7) on the growth of a bacteria culture. The table below gives the measurements of different cultures, in thousands of bacteria,

    asked by Quintyn

  57. math

    Flying with the wind, a plane traveled 570 miles in 3 hours. Flying against the wind, the plane traveled the same distance in 5 hours. Find the rate of the plane in calm air and the rate of the wind. Rate of plane ______mph Rate of wind ________mph

    asked by Quintyn

  58. math

    The fuel efficiency for a certain midsize car is given by E(v)= -0.016v^2+1.408v+3.8, where E(v)is the fuel efficiency in miles per gallon for a car traveling v miles per hour. What speed will yield the maximum fuel efficiency? _______mph. What is the

    asked by Quintyn

  59. Algebra 1

    Graph y= absolute x -2

    asked by Steve

  60. Algebra 1

    Describe how the graphs of y =IXI nand ym = IXI -15 are related. 1- the graphs have the same shape,. The y intercept of the 2nd graph is -15 2-the graphs have the same y intercept. The 2nd graph is steeper than y= absolute x 3- the 2 graphs are the same 4-

    asked by Steve

  62. math

    At a swim meet, a parent is videotaping his son from a seat in the stands that is 20 meters past the starting line and 8 meters away from his son's lane. Let x represent the distance the son has swum. a. Write x as a function of (theta). b. At what angle

    asked by Abby

  63. algebra

    to conduct a scientific experiment, students need to mix 90 millimeters of a 3% acid solution. They have a 1% solution and a 10% solution available. How many millimeters of a 1% solution and of the 10% solution should be coming to produce 90 millimeters of

    asked by j

  64. English..

    How does a gun represent fear? Hoe does pearls represent hope? How does a key represent hope?

    asked by Thi.

  65. Chem-Diprotic Acid

    Ascorbic Acid is an organic diprotic acid, H2A, that is found in many natural materials. KA1=7.94x10^-5 and KA2=1.62x10^-12. If you start with a 0.75 M solution of H2A, what is the concentration of ALL species in the solition at ph=3.8? I have no idea how

    asked by Matt

  66. calc

    Give the equation of a plane containing the points (1, 0, 0) and (1, 2, 1) and parallel to the line whose equations are x = y, z = so i found n to be then i used the equation n(r-ro) and got y-x+2z. the answer is x-y+2z =1. how do they get =1 and why is it

    asked by rebecca

  67. social studies

    a description on Guyana national flag

    asked by annie

  68. math

    Gina's art teacher mixes 9 pints of yellow paint with 6 pints of blue paint. Did Gina use the same ratio of yellow paint to blue paint instructed by her teacher.

    asked by charles

  69. math

    The Suarez family paid $15.75 for 3 movie tickets. How much would they have paid for 12 tickets.

    asked by andrew

  70. quantitative maths

    in a race A beats B by 100m. the ratio of their speeds is 5:4 . what is the length of the racecourse?

    asked by mona

  71. calc

    I have another question (studying for finals, haha) Let ~r(t) = et cost ~i + et sin t~j be parametric equations of a curve C. Find the length of C from t = 0 to t = π. so the equation I am using is the integral from a to b (in thsi case 0 to pi) of the

    asked by rebecca

  73. math

    A grocery store sells snacks by weight. A six ounce bag of mixed nuts costs $3.60. Predict the cost of a ounce bag

    asked by brandon

  74. Pre-Calc

    At a swim meet, a parent is videotaping his son from a seat in the stands that is 20 meters past the starting line and 8 meters away from his son's lane. Let x represent the distance the son has swum. a. Write x as a function of (theta). b. At what angle

    asked by Connor

  75. math

    The Martin family's truck gets an average of 25 miles per gallon. Predict how many miles they can drive using 7 gallons of gas.

    asked by eugene

  76. calc

    3. If f(x, y)=5 − 4x3 + 8y2, find a unit vector ~u for which the directional derivative D~uf(1, 1) is zero. im not sure how to do this one

    asked by rebecca

  77. Calculus

    Find the average value of the function f(x) 8x^2-9x+8 on the interval [3,5]. Find the value of the x-coordinate at which the function assumes it's average value The average value is ? the x-coordinate is ? Please help and showing work is much appreciated.

    asked by Anonymous

  78. chem

    convert .98L of N20 gas at STP to moles

    asked by Iestyn

  79. Math - Calculus

    If 75100 dollars is deposited in an account for 13 years at 5.35 percent compounded continuously , find the average value of the account during the 13 years period. The average value in the account is ? ** im alittle confused in how to find the average

    asked by Anonymous

  80. calc

    4. Compute ∂z/∂r + ∂z/∂s if z = sin u cos v, u = (r + s)2, and v = (r − s)2.

    asked by rebecca

  81. Economics- IPO help

    Does an IPO seem like a good idea for a business? What kind of things would you say in an SEC statement to demonstrate that your business? So would I say that the business is very successful and on its way in expanding?

    asked by Carey

  82. Math

    Factor: 22n2 + n - 5

    asked by Anonymous

  84. Interdependence

    How would a world with less interdependence affect my life. I don't really understand how it would affect me directly. Is it like the things we import, would have to made in the U.S so then it would be more expensive?

    asked by Mary

  85. chemistry check if my answers are right. drbobzz

    Acetylene gas(c2h2) is used in welding. During one job a welder burns 48.0 g of acetylene. Using a balanced equation for the complete combustion of acetylene calculate the following. Equation 2C2H2 + 5O2 ---> 4CO2 + 2H2O A) the mass of oxygen used B) the

    asked by Rose

  86. Wilton Manor Elm

    Along with the flowers, Samantha bought 4 packages of glass beads and 2 vases. The vases cost $3.59 each and the total sales tax was $1.34. The total amount she paid was $28.50, including sales tax. Explaing a stratehy you would use to find the cost of 1

    asked by Anonymous

  87. Stats

    The Internal Revenue Service (IRS) provides a toll-free help line for taxpayers to call in and get answers to questions as they prepare their tax returns. In recent years, the IRS has been inundated with taxpayer calls and has redesigned its phone service

    asked by Avery

  88. Physics

    . How much potential energy does the 2.5 kg rock sitting on an 18 –meter high cliff have?

    asked by Anonymous

  89. Psychology

    Hello, I am in need of help with a psychology question. Here is the information that was provided: Psychologists use field observations, laboratory experiments, and other methods to gather data relevant to their research questions. When sufficient data

    asked by Meredith

  90. Physics

    A woman runs up a flight of stairs. The gain in her gravitational potential energy is 6500 J. If she runs up the stairs at half the speed, what is her gain in gravitational potential energy?

    asked by Anonymous

  91. Chemistry

    The titration reaction of a solution containing 1.00 g mixture of Na2CO3 and K2CO3 with HCl shows that there are 8.50x10^-3 moles of C03-2. Find the weight percent of Na2CO3 and K2CO3 in the mixture. Please Help!!

    asked by Magaly

  92. rela

    need to do a shoe box diorama on an important event on Jean Fleury so I chose the attack on the Spanish vessels what would be things i would need?? how can i make it creative??

    asked by Reina Bonilla

  93. Calc I

    Find the derivative of y=(x^2 + x^3)^4 What I got: 4(x^2+x^3)^3 * (2x+3x^2) The correct answer: 4x^7(x+1)(3x+2) How did they get that?

    asked by Brian

  95. Factoring

    Factor: 14z2 - 49z + 35 I got 7(z^2-7z+5) but I got it wrong? Please correct me.

    asked by Anonymous

  96. math ratio and rate problems

    There are 6 cars, 10 trucks, 14 SUV,15 minivans. At this rate how many minivans would pass Luann if 60 vehicles passed her?

    asked by alena

  97. Psychology Questions

    I need help with a couple Psychology questions. 1. For most people, the ability to create language originates in the________. A. hypothalamus B. thalamus C. right hemisphere D. left hemisphere **My answer=D 2. Facts leanred in classes at school become part

    asked by Meredith

  98. math ratio and rate problems

    6 cars, 10 trucks, 14 SUV, 15 minivans. If 150 vehicles passed Luann, how many more minivans than cars would you expect to pass her?

    asked by alena

  99. statistics

    the hospital paper filing system contained 20,890 records. A total of 456 were identified as misfiled. What is the filing accuracy rate for the system? What is the percentage of misfiled records?

    asked by Anonymous

  100. Calc I

    if f(t)=sqrt(4t+1) find f''(2) I got the first derivative to be: 1/2(4t-1)^-1/2 * 4t^3 and i'm trying to figure out if i need the product rule again to find the second derivative -1t^3(4t-1)^-3/2 * 4t^3 The answer if -4/27 and I'm not sure how to get that

    asked by Brian

  101. calc

    If D is the solid region in the first octant bounded above by the paraboloid z = 1 − x2 − y2 and below by the xy-plane, the volume of D is: so i set this up integrating over dz dr dtheta and got pi/2 but the answer i spi/8

    asked by rebecca

  102. Finance

    A family purchased a new ski boat for $20,000. The loan agency required a down payment and financed the balance for 36 months with an APR of Determine the total finance charge and monthly payment for the loan.

    asked by Anonymous

  103. math

    3x+10=1

    asked by elijah

  104. Physics

    A 1000-kg car has four 10-kg wheels. What fraction of the total kinetic energy of the car is due to rotation of the wheels? Assume that the wheels have the same rotational inertia as disks of the same mass and size. Explain why you do not need to know the

    asked by Ashik

  106. Physics

    A 4.0-kg block extends a spring 16 cm from its unstretched position. The block is removed and a 0.50-kg body is hung from the same spring. If the spring is then stretched and released, what is period of oscillation?

    asked by Ashik

  107. Physics

    Electrons in an oscilloscope are deflected by two mutually perpendicular electric fields in such a way that at any time t the displacement is given by x = Acos(t), y=Acos(t+). Describe the path of the electrons and determine its equation (a)

    asked by Ashik

  108. statistics

    The HIM department has 200,000 active medical records and the department received 12,081 records requests during the year. The QI indicator of the HIM department is Eighty-five percent of records requests will be located within 15 minutes. Of the 12,081

    asked by Anonymous

  109. Math

    A bottle rocket travels along a parabolic path and reaches a maximum height of 21 feet after traveling a horizontal distance of 7 feet. A) Write a quadratic function of the form y=a(x-h)^2 +k that models the bottle rocket's path, assuming it leaves the

    asked by Jamie

  110. chemistry

    What is the mass of 4.3 × 10 to the power of15 atoms of nickel (Ni)?

    asked by danny

  111. english

    I need help with finding some poetry devices in the poem: Wordsmith by Susan young. I already have some, but would love a second opinion.

    asked by zack

  112. ratio and rates

    Gina's art teacher mixes 9 pints of yellow paint with 6 pints of blue paint to create green paint. Gina mixes 4 pints of yellow paint with 3 pints of blue paint.

    asked by bob

  113. calc - yet another

    If C is the curve y = x^2/2 + 1 from (0, 1) to (2, 3), then the line integral over C 3x ds = sorry for all the questions!

    asked by rebecca

  114. The Cask of Amontillado

    Hello, I had to answer to some questions on the this paragraph of 'The Cask of Amontillado' by Edgar Allen Poe. The paragraph: The thousand injuries of Fortunato I had borne as I best could, but when he ventured upon insult I vowed revenge. You, who so

    asked by Lillian

  115. Science

    A geologist working in a national park finds a mineral. He is carrying a kit that contains a penny, a hand lens, a piece of tile, a geologic hammer, and a jackknife. Describe how the geologist can use items to determine some of the mineral's

    asked by Mop

  117. Calculus

    L'hopital's question below: lim x -> 0 from the positive direction of ( 5^(sin(x)) - 1 )/ (x)

    asked by David

  118. chemistry. please help drbob222

    One of the reactions involved in the smelting of copper sulfide ores involves copper (I) oxide and copper (I) sulfide: 2Cu2O2 + Cu2S ---> 6Cu + SO2 Assuming that 35.00 g of copper (I) oxide is heated with 25.00 g of copper (I) sulfide A) determine which

    asked by Rose

  119. physics

    Two artifacts in a museum display are hung from vertical walls by very light wires. Wire T1 is horizontal from the left wall and goes to a center weight of 177N and wire T2 is at a 53 degree angle with the right wall heading from right to left downwards

    asked by Brock

  120. Physics

    A roller coaster goes 40-m along a section of track sloping 10 degrees below the horizontal, followed by a 13-m section sloping upward at 6 degrees, followed by an 26-m section of level track. Find the net displacement in m.

    asked by Lucy

  121. science

    A 7E+3 kg object is 9.29 m away from a 4.7E+8 kg object. What is the gravitational force between the two objects?

    asked by Brandon

  122. Chemistry

    A student was isolating copper metal from a copper salt. If the student started with 1.255g of copper (II) sulfate how many grams of copper solid would you expect them to recover?

    asked by Caroline

  123. Chemistry

    A student analyzing 2.000g of Epsom Salt found that it contained 39.0% by mass water. What is the hydration number for this sample?

    asked by Caroline

  124. Chemistry

    A 500 mL flask has a measured volume of 586.0 mL. A 0.608g sample of an unknown vapor occupies the flask at 373K at a pressure of 0.981atm. Assume the vapor behaves ideally. What is the molecular weight of the unknown vapor?

    asked by Caroline

  125. intro to computers

    You call the help desk to report a problem you are having on your computer. The technician asks you what operating system you are running. You know it is Windows 7 but you forget which version. How can you find out?

    asked by tiffany

  126. Science

    A geologist working in a national park finds a minerals. He is carrying a kit that contains a penny, a hand lens, a piece of tile, a geologic hammer, and a jackknife. Describe the geologist can use these items to determine some of the minerals

    asked by Anonymous

  128. English

    Background Ten years ago, you started working as a clerk for DMD Medical Supplies. Six months ago, Liz Jakowski, the human resources director, promoted you to office manager. You manage two employees: Jack Snyder and Ruth Disselkoen. Your office provides

    asked by Jacqueline

  129. Algebra

    The table below shows the opening value of a stock on the first day of trading in various years. Write a 4th degree model for the data and use the model to estimate the value on the first day of trading in 2010. (1994,2814) (1996,3603) (1998,5429)

    asked by Anonymous

  130. O-Chem

    Amide + Acetone -> ammonia + Acetone Enolate Weaker acid: Conjugate Base: Species that predominate at equilibrium(2): Please Help!

    asked by Delica

  131. Stats

    In a sample of 400 voters, 360 indicated they favor the incumbent governor. The 95% confidence interval? I can't figure out what to do without a standard deviation!!!!!!!!

    asked by Anonymous

  132. Math - Differentiate

    I just need an explanation of hoe to solve the following: f(x)= ln (x^3 + 5)+ 6x

    asked by Morgan

  133. World History

    Can anyone plsease share something about politics in the Minoan civilization?

    asked by losa

  134. physics

    An egg rolls off a kitchen counter and breaks as it hits the floor. The counter is 1.0 m high, the mass of the egg is about 50 g, and the time interval during the collision is about 0.010 s. How large is the impulse that the floor exerts on the egg? use

    asked by May

  135. AP US History

    Evaluate the extent to which the opposition of slavery contributed to maintaining continuity as well as fostered change in United States from 1776-1856 Please give some documents, events or some topics to help me write this essay

    asked by Darcy

  136. English

    1. If you hurry up, you will catch the bus. 2. If you hurry up, you can catch the bus. 3.If you hurry up, you may catch the bus. 4. If you hurry up, you shall catch the bus. (Are they all grammatical?)

    asked by rfvv

  137. linear algebra

    The weather on any given day in a particular city can be sunny, cloudy, or rainy. It has been observed to be predictable largely on the basis of the weather on the previous day. Specfically: if it is sunny on one day, it will be sunny the next day 1/2 of

    asked by jolia

  139. linear algebra

    Bob and Doug play a lot of Ping-Pong, but Doug is a much better player, and wins 80% of their games. To make up for this, if Doug wins a game he will spot Bob five points in their next game. If Doug wins again he will spot Bob ten points the next game, and

    asked by jolia

  140. math 211(linear algebra)

    uppose that the sequence x0, x1, x2... is defined by x0 = 4, x1 = 2, and xk+2 = 4xk+1+5xk for k≥0. Find a general formula for xk. Be sure to include parentheses where necessary, e.g. to distinguish 1/(2k) from 1/2k. .

    asked by danial

  141. art history

    Any help on this question? Which of the following pairs of biblical symbols stand for divinely sanctioned authority? a. lamb and dove b. nimbus and orant figure c. keys and chi-rho symbol d. palm leaves and shepard I'm really not sure so any direction or

    asked by anne

  142. Calculas

    an open box is to be made from a square piece of cardboard whose sides are 19 inches long,by cutting squares of equal size from the corners and bending up the sides. Determine the size of the aquare that is to be cut out so that the volume may be a

    asked by jessica

  143. Social studies

    Why were the greek city states open to an attack by Philip II of Macedonia?

    asked by Daniela

  144. Calculas

    A box lid is to be made from a rectangular piece of cardboard measuring 72 cm by 216 cm. Two equal squares of side x are to be removed from one end, and two equal rectangles are to be removed from the other end so that the tabs can be folded to form a box

    asked by jessica

  145. Calculas

    Johnny is designing a rectangular poster to contain 15 in^2 of printing with a 5-in margin at the top and bottom and a 3-in margin at each side. What overall dimensions will minimize the amount of paper used?

    asked by jessica

  146. Pre-Calc

    Log(x-6) +Log(x+3)=1

    asked by Anonymous

  147. Physics

    What air temperature will feel four times as warm as 0 °F?

    asked by Ashely

  148. Pre Cal

    Solve for x Log(x-6) +Log(x+3)=1

    asked by Anonymous

  150. Pre-Cal

    Log(x-6) +Log(x+3)=1 Solve for x thank u

    asked by Anonymous

  151. Physics

    A 7.68 m, 132 kg uniform ladder rests against a smooth wall. The coefficient of static fric- tion between the ladder and the ground is 0.642, and the ladder makes a 48.4◦ angle with the ground. How far up the ladder can a 528 kg person climb before the

    asked by Youthers

  152. Pre Calc

    Log(x-6) +Log(x+3)=1 Solve for x I think it has no solution but why?

    asked by Anonymous

  153. Algebra 1

    Write an equation for the linear function f with the following values: f (0) = 2 and f (2) = 8

    asked by Darrel

  154. Calc I

    Find an equation of the tangent to the curve at the given point. y=4(sinx)^2 point: pi/6,1) So I took the derivative of the original function to get: y' = 8cosx*sinx I then chose a point to plug in to find a point for the slope. i picked pi/6 because i

    asked by Brian

  155. language arts

    Choose the meaning that best matches the meaning of the patron A wealthy museum patron funded the construction of a new wing architect supporter artist celebrity is it supporter? Thanks!

    asked by hope

  156. spanish

    Juan oye _____ su perro Spot. Would I use a personal a in the blank or leave it as it is.

    asked by Morgan

  157. physics

    What is the gravitational acceleration on a planet where a 2.0 kg mass has a weight of 16 N on the planet`s surface?

    asked by Dillon

  158. physics

    Two artifacts in a museum display are hung from vertical walls by very light wires. Wire T1 is horizontal from the left wall and goes to a center weight of 177N and wire T2 is at a 53 degree angle with the right wall heading from right to left downwards

    asked by Brock

  159. chemistry

    a radioisotope is called a tracer when it is used to

    asked by mia

  161. language arts

    Which of the of the following phrases or sentences from the novel Johnny Tremain best describes the setting as the action of the story begins? A. and so, in a crooked little house at the head of Hancock's wharf on crowded Fish street B. On one side of the

    asked by hope

  162. English..

    Why does a gun represent fear?

    asked by Thi.

  163. language arts

    Which of the following phrases from the novel best describes Johnny's status, to place, in the household as the book begins? A. most of the boys in the other shops around Hancock's wharf liked Johnny B. Of the three boys, only Johnny read easily and well

    asked by hope

  164. MATH

    SOLVE FOR X THANK U LIFESAVERS Solve for x Log(x-6) +Log(x+3)=1

    asked by Anonymousee

  165. math

    The radioactive isotope sodium-24 is used as a tracer to measure the rate of flow in an artery or vein. The half life of sodium-24 is 14.9 hours.Suppose that a hospital buys a sample of sodium-24 a. how much of the sample will remain AFTER 48 Hours? b. How

    asked by Anonymousee

  166. Physics

    A block is at rest on an inclined plane. The mass is 44 kg. µs = 0.54 Find the critical angle, θc, at which the block just begins to slide. Answer in units of ◦

    asked by Maya

  167. Social Studies

    What four major battles of the civil war was fought in Tennessee?

    asked by Hayden

  168. Math

    For a savings account paying 2.4% in which interest is compounded MONTHLY. FIND THE Time needed to double the initial investment of 10000 dollars. The answer is 28.9 years but WHY

    asked by Anonymous

  169. math

    Two trains are on the same track a distance 100 km apart heading towards one another, each at a speed of 50 km/h. A fly starting out at the front of one train, flies towards the other at a speed of 75 km/h. Upon reaching the other train, the fly turns

    asked by Rohit

  170. Chemistry; stoichiometry

    Determine the theoretical yield of silver that is produced if the other product is Copper(II) Nitrate. Copper that reacted: 0.3180 This is what I had: 0.3180g Cu x 1mol Cu/63.5g Cu x 2mol Ag/1mol Cu x 107.87g Ag/1mol Ag = 1.079g Ag (Set up in factor label

    asked by John

  172. Calculus

    Find the area of the region bounded by the curves y=12-x^2 and y=x^2-6. Hint:The answer should be a whole number.

    asked by Bill

  173. Calc I

    I am having trouble taking the derivative of the following: t(4-t^2)^(1/2) I can't decide if you need to use the product rule or not. What I did is used the PR to get (4-t)^1/2)*1t^2*(4t-1)^(-1/2) Is this correct?

    asked by Jade

  174. Chemistry

    The tomato is dropped. What is the velocity, v, of the tomato when it hits the ground? Assume 94.7% of the work done in Part A is transferred to kinetic energy, E, by the time the tomato hits the ground.

    asked by Caitlin

  175. accounting

    Amazon Appliance Company has three installers. Larry earns $355 per week, Curly earns $460 per week, and Moe earns $585 per week. The company's SUTA rate is 5.4%, and the FUTA rate is 6.2% minus the SUTA. As usual, these taxes are paid on the first $7,000

    asked by Anonymous

  176. Business Mathmatics

    Fandango Furniture Manufacturing, Inc., has 40 employees on the assembly line, each with gross earnings of $325 per week. a. What are the total social security and Medicare taxes that should be withheld from the employees' paychecks each week? Social

    asked by KELLY

  177. Math

    A ladder 10 ft long leans against a wall. The bottom of the ladder is 6 ft from the wall. How much would the lower end of the ladder have to be pulled away so that the top end would be pulled down by 3 ft?

    asked by Candice

  178. Math

    The sum of the squares of three consecutive whole numbers is 77. Form a quadratic equation and hence solve it to determine the numbers. (Hint: let the three consecutive numbers be x, x+1 and x+2)

    asked by Alyssa

  179. health

    How might ethical issues alter your way of conducting change

    asked by monique

  180. calculus

    First, the bond pays 96 + 7 t per year for 10 years. Second, the interest rate is 5.25% compounded continuously. Round your answer to the nearest cent. Find the present value?

    asked by Dat nguyen

  181. Algebra

    The table below shows the opening value of a stock on the first day of trading in various years. Write a 4th degree model for the data and use the model to estimate the value on the first day of trading in 2010. (1994,2814) (1996,3603) (1998,5429)

    asked by Anonymous

  183. linear approximation

    a) Find the linear approximation of the function f(x)=4cos(3x^2) near x = 0 b) Use the approximation found in part (a) to estimate the value of f(pi/20)

    asked by Peter

  184. L'Hopitals Rule

    5) Use the L’Hopital’s method to evaluate the following limits. In each case, indicate what type of limit it is ( 0/0, ∞/∞, or 0∙∞) lim x→2 sin(x^2−4)/(x−2) = lim x→+∞ ln(x−3)/(x−5) = lim x→pi/4 (x−pi/4)tan(2x) =

    asked by Jane

  185. Math

    Jeremy has 19 coins of 2 different values. The total value of the coins is $1.00. What are the coins? How many of each coin does he have? Explain please

    asked by Braeden

  186. Math

    An object is dropped from a balloon from a height of 500m. (a) How long does it take to reach the ground? (b) If the object has an initial velocity of 12m/s, how long does it take to reach the ground? How far will it fall in 5 secnds?

    asked by CeCe

  187. chemistry

    100.0 mL of a dilute NaCl(aq) solution is heated in an open beaker. After 15 minutes the burner is turned off. Which of the following is true of the resulting solution? a more concentrated than the initial solution b less saturated than the initial

    asked by jepow

  188. chemistry

    63.0 mL of a 1.30 M solution is diluted to a total volume of 248 mL. A 124-mL portion of that solution is diluted by adding 173 mL of water. What is the final concentration? Assume the volumes are additive.

    asked by Anonymous

  189. math

    Compute Mary's estimated tax payment for the first quarter. She is self-employed and she expects to earn $61,440 this year. Her estimated income tax rate is 22%. For self-employed persons, social security tax is 12.4% of wages up to $106,800, and Medicare

    asked by Morgan

  190. Math

    The Empire Carpet Company orders merchandise for $14,486, including $475 in shipping charges, from Mohawk Carpet Mills on May 4. Carpets valued at $1,453 will be returned because they are damaged. The terms of sale are 2/10, n/30 ROG. The shipment arrives

    asked by Joe Paul

  191. calculus

    Previously asked: the length of a rectangular prism is increasing at a rate of 8 cm/s, its width is increasing at a rate of 3 cm/s, and its height is increasing at a rate of 5 cm/s. when the length is 20 cm, width is 10 cm, and height is 15 cm, how fast is

    asked by Dani

  192. physics

    an object explode and a to 2 kilograms piece moves north at 4 m/s and a 4 kilograms piece moves East at 1.5 meters per second. What is the momentum of the third piece? What is the mass of the third piece if it moves at a speed of 4 meters per second?

    asked by Breona

  194. Intro-Physics Help Please

    A spaceship lands on a new planet. the crew decides to measure the speed of sound in the planets atmosphere. taking a tube with a length of 50 cm, they find that one resonant frequency occurs at 2,520 Hz, and the next resonant frequency at 2,940 hz. what

    asked by Kayla

  195. Physics

    A uniform rod pivoted at one end (point O) is free to swing in a vertical plane in a grav- itational field, held in equilibrium by a force F at its other end. The rod of length 7 m and weight 4.7 N makes an angle 39◦ with the hor- izontal and the force

    asked by Youthers

  196. Trig (math)

    1.) Write the complex number in trigonometric form r(cos theta + i sin theta) with theta in the interval [0°, 360°). 9 sqrt 3 + 9i 2.) Find the product. Write the product in rectangular form, using exact values. [4 cis 30°] [5 cis 120°] 3.) [4(cos

    asked by Anonymous

  197. Algebra

    Our basketball team has finished 80% of its season, during which we won 40% of the games we played. What percent of the remainder of our games must we win in order to finish the season with the same number of wins as losses?

    asked by Bob

  198. physics

    A staging that weighs Wstaging supports a painter weighing 160 N. The reading on the left scale is 700 N and the reading on the right scale is 620 N. 700 N 620 N What is the weight of the staging? Answer in units of N

    asked by Jackie

  199. Physics

    A block is at rest on an inclined plane. 63 kg µs = 0.47 èc Find the critical angle, èc, at which the block just begins to slide. Answer in units of ◦

    asked by Jackie
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