Questions Asked on
April 5, 2016

  1. Algebra

    1. Simplify the expression: 4√18+5√32 A.45√2 B.32√2 C.116√2 D.9√50 2. Simplify the expression: 7√5-3√80 A.-5√5 B.-4√75 C.-5 D.4√-75 3. Simplify the expression: √21(√3+√14) A.9√7-49√6 B.2√6+√35 C.3√7+7√6 D.√357

    asked by GummyBears16
  2. Math(1 question plz help thanks!=D

    if two integers have the same absolute value which of the following is true about the integers? A. they must be the same integer B. they must be the opposite integer*** C. they could be the same or opposite integer (plz help my answer is with the***sign

    asked by Sparkles_01
  3. Algebra

    Two plumbers received a job. At first, one of the plumbers worked alone for 1 hour, and then they worked together for the next 4 hours. After this 40% of the job was finished. How long would it take each plumber to do the whole job by himself if it is

    asked by Hansel
  4. social studies { somebody please help me please

    What countries were members of the central powers in WW1? A. Austria-Hungary, Germany, Turkey*** B. France, , Germany, Russia C. France, Great-Britain, Russia D. Great-Britain, United States, Turkey 2. What caused the U.S to enter WW1 after 3years of

    asked by UNKNOWN
  5. English

    Which of the following quotes spoken by Juliet shows the strongest example of how she changes over the course of Romeo and Juliet? A. Madam I am here what is your will B. I'll look to like if looking liking move: but no more deep will I endart mine eye

    asked by Brianna
  6. Geometry

    A farmer is estimating the surface area of his barn to find how much paint he needs to buy. One part of the barn is triangular as shown. The base of the triangle is 22 meters long Both angles on either side connecting the base to each leg is 30 degrees.

    asked by SkatingDJ
  7. Chemistry

    Suppose a solution contains 0.21 M Pb2 and 0.41 M Al3 . Calculate the pH range that would allow Al(OH)3 to precipitate but not Pb(OH)2.

    asked by Jackson
  8. English

    Which of the following quotes spoken by Juliet shows the strongest example of how she changes over the course of Romeo and Juliet? A. Madam I am here what is your will*** B. I'll look to like if looking liking move: but no more deep will I endart mine eye

    asked by Briii
  9. science

    A pistol that fires a signal flare gives the flare an initial speed of 180m/s. Air resistance is ignored. (a)If the flare is fired at an angle of 55° above the horizontal, what is the horizontal range? (b)If the flare is fired at the same angle over the

    asked by Gibson
  10. Language

    In which of those lines is the meaning of the word intercede best expressed? A. The attacker between the goal and goalie. B. In court cases, attorney intercede on their client's behalf.•• C. If you don't agree with someone you should try to Intercede.

    asked by Zachary
  11. Math

    Triangle ABC is reflected over the y-axis what are the coordinates of the reflected triangle describe in words what happens to the x coordinates and the y coordinates of the original triangle's vertices as a result of this reflection. Please help! Thank

    asked by Please Help!
  12. Geometry

    A piece of art is in the shape of an equilateral triangle with sides of 21 in. What is the area of the piece of art to the nearest tenth? 311.8 in.^2 381.9 in.^2 155.9 in.^2 191.0 in.^2 Please help?

    asked by SkatingDJ
  13. math

    my mystery number has 3 tens and 15 ones. What number am i thinking of

    asked by patty
  14. Chemistry

    A solution contains 0.0390 M Pb2 (aq) and 0.0390 M Sr2 (aq). If we add SO42–(aq), what will be the concentration of Pb2 (aq) when SrSO4(s) begins to precipitate? I am just completely lost on this one.

    asked by John
  15. Chemistry

    How many kilojoules are released when 130 g of Si reacts with chlorine? Si(s)+2Cl2(g)→SiCl4(g)ΔH=−657kJ

    asked by Cara
  16. Maths

    How many silver coins, 2cm in diameter and of thickness 2 mm, must be melted to form a showpiece in the form of a frustum of a cone having height 9 cm and radii of the outer circular ends as 5cm and 3cm?

    asked by Simran
  17. math

    A student spends 37.5% of his money on food 28.75%on rent and 15% on books. what percentage what percentage of her money is left to spend on other things

    asked by Nita
  18. Math

    During exercise, the recommended maximum heart rate in beats per minute is modeled by the formula M=176-0.8A, where M is the maximum heart rate and A is the person’s age. Approximately, at what age would you have a recommended heart rate in beats per

    asked by kaden
  19. Trigonometry

    if cos x=2/3 and x is in quadrant 4 find tan(x/2),sin(x/2),and cos(x/2) i got sin(x/2)=squr 1/6 tan(x/2)=squr 2/6 cos(x/2)=squr 5/6

    asked by Ryan
  20. math

    To determine the squirrel population in a city park, researchers tagged 90 squirrels. Later, they counted 630 squirrels, 42 of which had tags. Based on this data, what is the total number of squirrels in the park? THANK YOU!

    asked by Tim
  21. Math

    The table below shows the number of deaths in the U.S. in a year due to a variety of causes. For these questions, assume these values are not changing from year to year, and that the population of the United States is 312 million people. Table: Cause

    asked by Anonymous
  22. Language

    In which sentence is the meaning of the word astonish expressed? A. Marley says that nothing will surprise Scrooge, given all that he has seen.•• B. Christmas present asks Scrooge to touch his robe. C. Fred's wife expressed her pleasure at the amount

    asked by Zachary
  23. Social Studies

    How can personal finance decisions affect the economy? Link please. Thanks :)

    asked by Amber
  24. Math

    There are 28 students in math class. 22 of them passed the test. What percentage passed the test.

    asked by Jo Leon.
  25. Math

    Rectangular Prism: Length: 41 ft Width: 32 ft Height: 49 ft 1. Find the surface area for the given prism. 7,154 ft^2 2,624 ft^2 9,778 ft^2 8,432 ft^2. Help please because I'm not sure.

    asked by Amber
  26. Chemistry

    1) If 0.5 moles of a mono alkanoic acid weighs 44g,determine the molecular formular. 2) molecular formular =emprical * n. 3) molecular formular = 44*0.5

    asked by Miracle
  27. Language

    in which line is the opposite of the word audible best expressed? " Spirit tell me if Tiny Tim will live" " Save your Breath Mr. Scrooge. You can't be...... heard"•• "I'll drink to his health for your sake..... But not for his sake" "Mark my words,

    asked by Zachary
  28. College Algebra

    The logistic growth function f(t)= 100,000/5000e^-t describes the number of people, f(t), who have become ill with influenza t weeks after its initial outbreak in a particular community. A) How many people became ill with the flu after the epidemic began?

    asked by Devin
  29. Probability (check)

    In how many ways can 2 singers be selected from 4 who came to an audition? a. 6 b. 2 c. 12 d. 4****

    asked by CarpeDiem
  30. Math

    Bill's baseball bag weighs 4 pounds . If he takes out 2 pairs of cleats that weigh 6 ounces each . How much will his bag weigh? Please show the work

    asked by Ls
  31. Chemistry

    How many kilojoules are absorbed when 266 g of PCl5 reacts? PCl5(g)→PCl3(g)+Cl2(g)ΔH=+67kJ

    asked by Cara
  32. Math

    Determine which ordered pair is not a solution of y= -4 , x -9 (-9,27) (3,-21) (5,-28) This is graphing coordinates. Please help I've been staring at this for 30 minutes so confused.

    asked by Please Help
  33. science help pls pls

    Which of the following is a myth about water conservation? An important part of water conservation is preventing water pollution. Buying bottled water conserves more water than drinking from the tap. Air-drying clothes conserves more water than using an

    asked by Oscar
  34. 5th grade math

    Two pails of different sizes contain 34.5 liters of water altogether. When 0.68 liter of water is poured from the bigger pail into the smaller pail, the amount of water in the bigger pail is 9 times that in the smaller pail. How much water was there in

    asked by Bella
  35. Geography and Society

    Research the steps that have been taken since the Christmas Day Tsunami to try to prevent similar disasters. Your response should cite at least three measures that have been taken since the Christmas Day Tsunami and how these steps directly relate to the

    asked by Kaai97
  36. Math

    Jenny bought scrapbook supplies for $70.75. She paid $5.66 in sales tax. What was the sales tax rate on the supplies? If necessary, round your answer to the nearest tenth.

    asked by Lily
  37. Social Studies

    How were the carpetbaggers able to influence freed slaves in the south? A. They gave them land and helped them start farms. B. They took advantage of their inability to read and write. C. They promised them high-paying jobs in the newly elected government.

    asked by Karl
  38. Chemistry

    Which of the following molecules is/are nonpolar? H2S O3 COS C2H2 SO2 SiF4 PF3 HCN NH3 CS2 HN3 SO3 CF4 BF3 H2O N2O AsH3

    asked by Anonymous
  39. physics

    A ball bounces to 34 percent of its original height. *1) What fraction of its mechanical energy is lost each time it bounces? *2) What is the coefficient of restitution of the ball-floor system? - I was able to solve part one and get an answer of .66, but

    asked by David
  40. calculus

    Use a graphing utility to graph the function and find the absolute extrema of the function on the given interval. (Round your answers to three decimal places. If an answer does not exist, enter DNE.) f(x) = x^4 − 2x^3 + x + 1, [−1,3] minima (x, y) =

    asked by Sagar
  41. PHYSICS PLS GUYSS

    What does the slope of a Kinetic Energy V.S Gravitational Potential Energy graph represent? I found 1 but I don't know what it represents I know that PE+KE=constant

    asked by Amelie
  42. Math

    A isosceles triangle has two angels that measure 75. What is the measure of the third angle of the triangle? A)30 B)40 C)75 D)90***

    asked by I need help
  43. Math

    A company will make a cereal box with whole number dimensions and a volume of 100 cubic centimeters. If cardboard costs $0.05 per 100 square centimeters, what is the least cost to make 100 boxes? (Please help me!!)

    asked by Helen
  44. body science

    I have to do this for an open ended question on my unit test and i am not sure if i did it right can you please check my answers? It is fill in the blank. And the choices are: Arteries,Artium,Body,Carbon Dioxide,Lungs,Veins,Ventricle. You may youse these

    asked by Stacie
  45. Physics (light)

    A soap film is viewed in white light. If the film is much thinner than the wavelength of blue light, what is the appearance of the film? The soap film appears totally transparent because it reflects no visible light. The soap film appears blue because all

    asked by jacob
  46. Geometry

    The expression (a-4) represents the measure of an interior angle of a regular 20-gon. WHat is the value of a in the expression

    asked by Anonymous
  47. Chemistry

    Draw the most important Lewis structure for the H 3 CNCO molecule. (Note: The atoms are bonded in the order CNCO, with the three H atoms bonded to the first carbon atom.) After you have identified the most important Lewis structure, answer the following

    asked by Anonymous
  48. calculus

    Solve the given equation. (Enter your answers as a comma-separated list. Let k be any integer. Round terms to two decimal places where appropriate.) tan θ = −square root of 3 answer in radian and please use the k integer

    asked by Sagar
  49. Chem

    Compound B is burned in a bomb calorimeter that contains 1.50 liters of water. When I burned 50.0 grams of compound B in the calorimeter, the temperature rise of the water in the calorimeter was 35.0 degrees C. If the heat of combustion of compound B is

    asked by Rose
  50. calculus

    Find the absolute extrema of the function (if any exist) on each interval. (If an answer does not exist, enter DNE.) f(x) = square root of (25 − x^2) (a) [−5, 5] minimum (x, y) = (smaller x-value) (x, y) = (larger x-value) maximum (x, y) =

    asked by Sam
  51. Math

    The measures of the sides of a right triangle form an arithmetic sequence of common difference 2. What are these measures?

    asked by John
  52. Chem

    How many grams of oxygen are there exactly in 100.0 g of carbon dioxide?

    asked by Tony
  53. Math

    Jack is going to fill his beach ball with water. The radius of the ball is 24in. How much water will it take to fill the beach ball? 4/3(3.14) 4.19 (2)^3 4.19 (8) 33.52 Instead of using 24in. I used 2ft. Instead since 24in. Equals 2 ft.

    asked by Sue
  54. Oklahoma History

    In the 1800s, the US established forts west of the Mississippi River from Louisiana to Minnesota to establish peace among warring American Indian tribes and to __________. A. provide American Indians with funds and goods for their survival B. strengthen

    asked by Makayla
  55. chemistry

    A mixture of 0.2 moles of alcohol A and 0.5 moles of alcohol B has a total vapour pressure of 40 mmHg at 297 K. If the mixture obeys Raoult's law, find the vapour pressure of pure B at 297 K given that the pressure of a pure A is 20 mmHg at 297 K.

    asked by jay
  56. Math help please

    Prove this identity using the product-to-sum identity for sine: sin^2 x=1-cos(2x)/2

    asked by Kyle
  57. Math

    . If there are 1050 students in a school and the ratio of boys to girls is 9:5, then what is the number of boys in the school?

    asked by Kate
  58. Chemistry

    The formation constant* of [M(CN)4]2– is 7.70 × 1016, where M is a generic metal. A 0.150-mole quantity of M(NO3)2 is added to a liter of 0.870 M NaCN solution. What is the concentration of M2 ions at equilibrium?

    asked by Meghan
  59. Math

    All 231 students in the math club went on a field trip some students Road in bands which hold seven students each and some students Road and buses which hold 25 through and see how many of each type of vehicle did they use if there were 15 Vehicles total

    asked by Abby
  60. Chemistry

    2Mg +O2 > 2MgO Write experiment to prove that the product is basic oxide?

    asked by Venk
  61. physics

    A ball bounces to 34 percent of its original height. *1) What fraction of its mechanical energy is lost each time it bounces? *2) What is the coefficient of restitution of the ball-floor system? - I was able to solve part one and get an answer of .66, but

    asked by David
  62. math

    What is the net gain or loss in yardage for a football team that gains 6 yards, loses 12 yards and then gains back 15 yards?

    asked by billy
  63. GC

    A circular fountain has a diameter of 12 feet. A 2-foot wide path surrounds the fountain. What is the total area of the fountain and the path around it?

    asked by audrey
  64. physics

    A 1400-N uniform boom at ϕ = 70.0° to the horizontal is supported by a cable at an angle θ = 20.0° to the horizontal as shown in the figure below. The boom is pivoted at the bottom, and an object of weight w = 2250 N hangs from its top. (a) Find the

    asked by mark
  65. Math

    Gina has 4 red ribbons, 6 times as many blue ribbons as green ribbons, and 1/4 as many green ribbons as red ribbons. How many ribbons does she have in all?

    asked by Robert
  66. math

    A store keeper is paid 10% commission on all goods sold . what commission will he receive if he sells goods worth 150,500.00 ?

    asked by Nita
  67. Social Studies

    I only need to get these answers checked please. How were the carpetbaggers able to influence freed slaves in the south? a. They gave them land and helped them start farms b.They took advantage of their inability to read and write. c. They promised them

    asked by BossManJenkins
  68. Math

    A company will make a cereal box with whole number dimensions and a volume of 100 cubic centimeters. If cardboard costs $0.05 per 100 square centimeters, what is the least cost to make 100 boxes? Please help me, I have no clue how to solve.

    asked by Helen
  69. algebra

    Goran invested his savings in two investment funds. The amount he invested in fund A w!@#$%^&2000 less than the amount he invested in fund B. Fund A returned a 3% profit and fund B returned a 2% profit. How much did he invest in fund A, if the total profit

    asked by Leah
  70. Physics

    A 25 N box is pulled vertically upward by means of a cord.Find the acceleration of the box if the tension in the cord is 35 N.

    asked by Arcel
  71. physics

    A flywheel is a solid disk that rotates about an axis that is perpendicular to the disk at its center. Rotating flywheels provide a means for storing energy in the form of rotational kinetic energy and are being considered as a possible alternative to

    asked by reghuir
  72. physics

    The system of small objects shown in the figure below is rotating at an angular speed of 2.0 rev/s. The objects are connected by light, flexible spokes that can be lengthened or shortened. What is the new angular speed if the spokes are shortened to 0.15

    asked by mark
  73. Chemistry

    What volume of 1.00M ca(oh)2 is needed to neutralize 250.0mL of 0.100M HCL?

    asked by Sierra
  74. Trig

    suppose that the angle theta is in the second quadrant, and that sin(theta)=1/3. Find exact values for cos (theta) and csc (theta)

    asked by alicia otto
  75. maths

    two-fifth of the students in a mixed school are boys. if there are 30 girls in the school how many are boys.

    asked by Nita
  76. math

    Phillip wants to estimate how many words are in a book he is reading for class. He counts the words on 21 pages, and he finds the mean word count is 311 words per page. There are 196 pages in the book. Which is the best estimate for the total number of

    asked by Tim
  77. chemistry

    a 25% by mass H2SO4 solution has a density of 1.07 g/cm3 how much solution contains 13.37 g of H2SO4

    asked by Annette lobos
  78. computer ( Ms.Sue help )

    To reveal paragraph markers, such as spaces, hard returns, and tabs in your document, you should A. click the General tab. B. click the Page Layout tab. C. right-click anywhere in the task bar and click the ¶ symbol. D. click the Show/Hide button. C?

    asked by Brooklyn
  79. Calculus

    The number of Internet host computers (computers connected directly to the Internet, for networks, bulletin boards, or online services) has been growing at the rate of f(x) = xe^(0.1x) million per year, where x is the number of years since 1990. Find the

    asked by Wade Wilson
  80. life oriantation

    Critically discuss six ways that the human rights violations influences the broader south africa community

    asked by Ndubo Nebuxoma
  81. Chemistry

    Consider the following three reactions: Ca(s) + 2H2O(l) ---> Ca2+(aq) + 2OH^- (aq) + H2(g) CaO(s) + H2O(l) ---> Ca2+ (aq) + 2OH^- (aq) H2(g) + 1/2O2 (g) ----> H2O (l) Delta H = 430.75 kJ Delta H = 81.55 kJ Delta H = 285.63 kJ Determine Delta H for the

    asked by Rose
  82. Grade 11 Math Trig Ratio

    Solve cos315*cos(-390)-sin225*sin750 cos315:

    asked by AmbiguousCase
  83. Math

    4) Jack is buying gift bags for his daughter’s 5th birthday party. His budget is between $20 and $30. He has a choice of $2, $3 and $4 bags. If he buys $4 bags he will have $3 remaining, if he buys $3 bags he will have $2 remaining, and if he buys $2

    asked by Hitesh kumar
  84. trig

    2(sinx)^2-5cosx-4=0 Solve for all solutions between [0,2pi]

    asked by Anonymous
  85. maths

    calculate third angle of an isosceles triangle whose base angle is 48 degrees

    asked by Nita
  86. English

    forward/forwards backward/backwards upward/upwards downward/downwards inward/inwards outward/outwards eastward/eastwards westward/westwsrds rightward/rightwards leftward/leftwards ----------------------- Are both interchangable? Which ones are from British

    asked by rfvv
  87. maths

    There are 40 students in a class.14 of these students are girls. What percentage of the class are girls?

    asked by Amelia
  88. Intermediate algebra

    Jarrett was selling tickets at local carnical. The tickets cost 2.00 for adults and 1.50 for children. How many of each kind of ticket did he sell if he sold a total of 300 tickets for $525?

    asked by Patricia
  89. Chemistry

    Which of the following molecules is/are bent or V-shaped? C2H2 SiF4 H2S SO2 CF4 HCN NH3 COS H2O O3 SO3 AsH3 CS2 BF3 N2O HN3 PF3

    asked by Anonymous
  90. college algebra

    The electrical resistance of a wire of a given material varies as its length and inversely as the square of the diameter. if a wire 300 feet long and 0.05 inches in diameter has a resistance of 30 ohms, (a) find the resistance of a wire which is 1000 feet

    asked by Sam
  91. Physics

    Please solve and answer. Need done ASAP. A speeder passes a parked police car at 35.0 m/s. The police car starts from rest with a uniform acceleration of 2.39 m/s2. (a) How much time passes before the speeder is overtaken by the police car? __ s (b) How

    asked by Cheyenne
  92. Algebra

    How do you do:4x-6y-3=7x+2y-4=-2x+3y+24 Thankyou

    asked by Anonymous
  93. math

    One serving of punch is 250 millimeters. Willten servings fit in a 2 liter bowl? Explain.

    asked by tj
  94. Science

    what volume of air containing 20% O2 will be required to burn completely 10cm3 each of methane and acetylene?

    asked by Susmita
  95. physics

    How can we increase the rate of change of magnetic flux? ( i want to check my answer)? Can it be : a) using a stronger magnet b) increasing the rate of movement of the conductor? are these correct?? both of them

    asked by clive
  96. calculus

    Solve the given equation. (Enter your answers as a comma-separated list. Let k be any integer. Round terms to two decimal places where appropriate.) tan θ = −square root of 3

    asked by Sagar
  97. Math

    Which hand has covered more distance from the 12 on a clock, the minute hand at 4:00 or the second hand at 15 seconds past? Write a fraction inequality to support your answer.

    asked by Emily
  98. math

    one of the interior angles of a regular polygon is 144degrees find the number of sides of the polygon

    asked by Nita
  99. chemistry

    When water freezes and becomes solid ice, the hydrogen bonds create a crystal structure and there is fixed space between each water molecule. This causes ice to? a.become more dense than liquid water because it is a solid* b.become less dense than liquid

    asked by Boberto
  100. Math

    Using only sides that are whole numbers, name the dimensions of three rectangles that have perimeters of 14 units.

    asked by Lucy
  101. Math

    Kelby has some money. She bought a birthday gift for $11 and spent one-half of the remaining money on clothes. She spent 4/5 on gas and used 1/5 of what was left for entertainment. She saved the $28 she had left. How much money did she have to start with?

    asked by Rachelle
  102. physics

    A meter stick is rotated about the end labeled 0.00 cm, so that the other end of the stick moves through an arc length of 6.20 cm. Through what arc length s does the 25.0-cm mark on the stick move? any help, please?

    asked by Madison Smith
  103. calculus

    Determine whether Rolle's Theorem can be applied to f on the closed interval [a, b]. (Select all that apply.) f(x) = x^2/3 − 2, [−8, 8] 1) Yes, Rolle's Theorem can be applied. 2)No, because f is not continuous on the closed interval [a, b]. 3)No,

    asked by Sagar
  104. Physics

    Blue light (λ vac= 440 nm) shines onto a puddle of water (n water = 1.33). There is a thin layer of oil (n = 1.47) on top of this water. What is the minimum thickness of the oil if there is constructive interference for the light? I tried 2t=(m+

    asked by B
  105. jordan

    Sanjay wants to buy a condominium in 3 yrs. He's planning to save for down payment. He plans to deposit $2500 at the beginning of each year into a savings account. The savings account pays 2.25% interest, compounded monthly. How much money will Sanjay have

    asked by Banking
  106. Physics- Optics

    A double lens system is made of +35.0 cm lens (lens #1) and a - 26.0 cm lens (lens #2). Lens #1 is placed at x = 0 cm on a meter stick and lens #2 is placed at x = 30.0 cm. Where on the meter stick will the final image be formed when looking at a distant

    asked by B
  107. Physics

    an object is dropped from rest the top of a building 19.6 m hi. calculate the a) time for the object to reach the ground and b) object's speed just before it strikes the ground

    asked by Rocio
  108. high school chemistry

    You are going to titrate 20 mL of .10M HCL with 0.10M NaOH. What is the pH at the equivalence point. How do I figure out the equivalence point when I have already figured out that the initial pH of the HCL and NaOH are both 1?

    asked by Jerome
  109. Math

    There are 92 band students. For a concert, the stage is divided into four sections. 24 students sit on the left, 36 sit in the middle, 28 sit on the right, and 4 stand behind the others. What fraction of the band sits in the middle?

    asked by Kate
  110. maths

    A cylindrical can of volume 198cm has a height of 7cm. find the radius of the cylindrical

    asked by Nita
  111. Geometry

    The expression (n+3) represents the measure of an exterior angle of a regular 18 gon. What is the value of n in the expression

    asked by Anonymous
  112. calculus

    Find the absolute extrema of the function (if any exist) on each interval. (If an answer does not exist, enter DNE.) f(x) = square root of (25 − x^2) (a) [−5, 5] minimum (x, y) = (smaller x-value) (x, y) = (larger x-value) maximum (x, y) = (b) [−5,

    asked by Sagar
  113. science help pls pls

    Which of the following best explains how water conservation can reduce waterborne diseases in a community? More people will have clean water to drink and bathe in. More people will drink bottled water imported from faraway springs. More people will be

    asked by Oscar
  114. Geometry

    A rectangular grass area ub a park measures 50 yards by 100 yards. The city wishes to put a uniform sidewalk around the grass area which would increase the area by 459 yd ^2. What is the width of sidewalk

    asked by Anonymous
  115. Chemistry

    The reaction through which carbon changes from graphite to diamond form is represented by the equation C(graphite) ---> C(diamond) delta H: ? Using the reactions below, determine the amount of heat absorbed in the change of one mole of graphite to one mole

    asked by Rose
  116. english

    "What light is to the eyes – what air is to the lungs – what love is to the heart, liberty is to the soul of man." Robert Green Ingersoll i need help with this quote. I know its about freedom. what exactly he is saying what does it mean? please help i

    asked by Tim
  117. Chemistry

    Potassium oxide reacts with water to produce of potassium hydroxide. Please provide a balanced equation, and determine how much potassium oxide is needed to produce 80.5g of potassium hydroxide?

    asked by Nicole
  118. Math

    Jack is going to fill his beach ball with water. The radius of the ball is 24in. How much water will it take to fill the beach ball? 4/3 X 3.14 = 4.186 4.186 (24^3) 4.186 X 13,824 Answer: 57,867.264

    asked by Sue
  119. chemistry

    What characteristic of water will remain the same regardless of what may be dissolved in it? a.the ratio of hydrogen to oxygen b.the freezing temperature c.the ability to refract light d.the hydroxide ion concentration i think its a?

    asked by Boberto
  120. physics

    When is the kinetic energy equal to zero?

    asked by sara
  121. math

    what is the square root of 576?

    asked by math star
  122. Spanish

    ¿Qué obras de arte o de literatura influyen en tu vida? What would be an answer to this? I believe the question is asking what art or literature has influenced your life.

    asked by Jan
  123. math

    jack runs 3 miles in 27 minutes at this rate how long will it take him to run 10 miles

    asked by ajia
  124. physics

    A car starts travelling from rest and undergoes constant acceleration for 10 seconds. If it is travelling at 6m/s after 3 seconds what will be its final velocity?

    asked by anabelle
  125. Physics

    Span of a bridge is 32.0m and has a mass of 5.38x10^4 kg. A truck of mass 11700kg is stopped at 11.4m from one end. Find upwards force that must be exerted by each pair

    asked by Sihle
  126. Math

    Jack is going to fill his beach ball with water. The radius of the ball is 24in. How much water will it take to fill the beach ball? 4/3(3.14) 4.19 (2)^3 4.19 (8) 33.52 Instead of using 24in. I used 2ft. Instead since 24in. Equals 2 ft.

    asked by Sue
  127. Biology

    I'm sorry but I had to post this question again as I left out the question. In a certain species of plant, the allele to produce green melons (G) is dominant over the allele to produce yellow melons (g). A student performed a cross between a plant that

    asked by Stephanie
  128. Precal/Math

    How do i find the equation in the form: y=a(sqrt b(x-h))+k From the points (-5,3) (-4,-1) (-1,-5)

    asked by Bobbie
  129. Geometry

    I have to find the area of a triangle. The base is 22 The height is 11 square root 3... for this, it was 19.052... I rounded that to just 19. Was this okay??? I then get 418, divided by 2, and got 209 as the area. Was it accurate that I rounded that

    asked by SkatingDJ
  130. PHYSICS. HELP!my work

    two force of 20N and 34N act on a body in such a way that they make an angle of 35 with each other. find the resultant of the two force

    asked by shemsa
  131. Acid Base Chem

    During the course of an experiment with hydorgen phsophate (HPO42-) you find that it is functioning as a base. When you search for the Kb value of it you only find pKa1= 2.15, pKa2= 7.20, and pKa3= 12.35 of phosphoric acid (H3PO4). What is the Kb value??

    asked by Jen
  132. CHEM

    I am lost. I have to create a buffer using NH4CL and 0.10 M NH3. I have to chose how much of the reagent to use in order to get a concentraion between 0.01 and .5 M. Then after I come up with the recipe for that I have to calculate the pH baces on the

    asked by Erica
  133. maths

    two-fifth of students in a mixed school are boys if there are 30 girls in the school how many are the boys

    asked by Nita
  134. Statistics

    θ=0.5 θ=1 θ=2 θ=3 λ = 2 θ = 0.5 μ = 0.5 σ = 0.5 θ=0.5 0 2 1 0.270670566 2 0.036631278 3 0.004957504 4 0.000670925 5 9.07999E-05 draw the graph for θ=1 θ=2 θ=3 The first θ=0.5 graph was drawn for you so follow the same procedure for the others.

    asked by Eddy
  135. Maths

    Two persons are on opposite sides of a tower. They measure that the angle of elevation of the top of the tower are 30°and 45°respectively. If the height of the tower is 50metres, find the distance between the two persons.

    asked by Simran
  136. math

    the volume of a cone is 154cm^3 .if it's radius is 7cm . calculate the height of the cone

    asked by Nita
  137. math

    What is 791 diveded by 38 estimate

    asked by ralyn
  138. english

    How does the title sweat represent the tears Delia was crying from the abuse she received. in the book sweat by Zora Neale Hurston.

    asked by Sherianna
  139. CHEM

    am lost. I have to create a buffer using NH4CL and 0.10 M NH3. I have to chose how much of the reagent to use in order to get a concentration between 0.01 and .5 M. Then after I come up with the recipe for that I have to calculate the pH based on the

    asked by Erica
  140. Math

    Each sheet of glass they use to make the windows is 9 feet long and 6 1/2 feet wide. How many sheets will they need in order to make the windows?

    asked by I don't know how to solve this
  141. maths

    Ayodeji made a profit of 28percent on an article he bought for 3600.00 . how much did he sell the article?

    asked by Nita
  142. Math

    Jack is going to fill his beach ball with water. The radius of the ball is 24in. How much water will it take to fill the beach ball? 4.19 (2)^3 4.19 (8) 33.52

    asked by Sue
  143. Math

    The area of parallelogram with base 2.5 cm height 3 cm equals to triangle its side length 5 cm Find the height of triangle.

    asked by Mido
  144. Chemistry

    Explain why heat or acid causes the protein to unfold? What is happening chemically? Is this correct what I am saying? if not please help. The folding of proteins is mostly the result of intermolecular forces of attraction such as hydrogen bonding. Both

    asked by Anonymous
  145. English, Please help me correct the grammar

    House and Lot for sale. With 2 rooms on the 2nd floor and own toilet. 1room on the ist floor. Lot area 80 square meter. Total Price pesos 500k negotiable 2 rooms are being rented with tenants for monthly rent. Reason, I'll be leaving for abroad and no one

    asked by JESSIE
  146. Chemistry

    For the H 3 CNCO molecule, (Note: The atoms are bonded in the order CNCO, with the three H atoms bonded to the first carbon atom.) answer the following questions. What is the ideal H-C-H bond angle? (0, 30, 45, 60, 90, 109, 120, 145, or 180.) What is the

    asked by Anonymous
  147. chemistry 107

    participates that forms when aqueous barium nitrate and potassium sulphate are mixed

    asked by obi mark
  148. Biology

    I'm doing a research paper on Plectaster decanus, the Mosaic Sea Star and I'm looking for certain information on its diet. There is little information on the internet about this species so I was wondering what is the general diet of a southern Australian

    asked by Kevin
  149. Trigonometry

    For how many values of x such that 0

    asked by Katie
  150. precalculus

    2(sinx)^2-5cosx-4=0

    asked by Anonymous
  151. math

    I need help making this question into a equation? A cable television company charges $15 plus $5 each for extra services and now write an equation to show how much a person would pay for television if they had x number of extra services?

    asked by charles
  152. Math

    is a trapezoid a parallelogram explain why or why not

    asked by Mimi
  153. math

    A regular polygon has the sum of the interior angles as 3240degrees . find the number of sides the polygon has.

    asked by Nita
  154. Maths

    I am in a queue with n fewer people behind me than in front of me.there are three times as many people in the queue as there are behind me. How many people are behind me in the queue in terms of n?

    asked by Panda
  155. Chem

    A gas has a pressure of 1.2 atm with a volume of 50.0 L and a temperature of 25 C, If the pressure is changed to 2.0 atm while the temperature is increased to 50 C, what is the new volume?

    asked by Chrissiee
  156. math

    a cone has a height of 6.if the volume of the cone is 24xpi, what is the radius of the cone?

    asked by jalen
  157. Social Studies

    Which of these Australian Aboriginal populations would have suffered the LARGEST number of deaths in the 1780s and 1790s? A. Settlements in the OutBack B. roaming bands of hunter gatherers C. Densely populated coastal settlements D. villages along

    asked by Noemi
  158. ratio and proportion

    Three villages share water from a water tank.The tank holds 3,600 gals of water. The villages used the following ratio 2:3:4. how many gallons does village b use? how many gallons does a and c use together? wahat is the difference on the amount used by c

    asked by Daniel
  159. Spanish

    Please check my answer. Are all the accent marks, grammar, and spelling correct? ¿Qué hago para ponerme en forma? Para ponerme en forma hago ejercisios y como bien.

    asked by Jan
  160. physics

    an inclined plane, which slopes at 37degree is used to raise a 10 kg object to a heghit of 4m if the efficency is 80% determine a,the load (t@ke sin 37=0.6,cos 37 =0.8) b,the cofficent of kinetic friction c,the effort force

    asked by sami
  161. math

    What is the value of each exterior angle of a regular polygon

    asked by Nita
  162. Math

    Two and four hundred eight ten-thousandths

    asked by Ally
  163. math(pls help me)

    1.The management committee of Zenith has indicated its desire to accept only 40% of all continuing undergraduate based on the results of the end-of-second semester examinations.the mean score of the examination is 500 and standard deviation of 100.Find the

    asked by Ruby
  164. s.e.international

    a ball of mass 200gm travelling at 20m/s is hit back with a velocity of 30 m/s .if the force lasts for 0.1sec ,find force and change in momentum

    asked by dhwanil
  165. Math

    Jack is going to fill his beach ball with water. The radius of the ball is 24in. How much water will it take to fill the beach ball? 4.19 (2)^3 4.19 (8) 33.52 Instead of using 24in. I used 2ft. Instead since 24in. Equals 2 ft.

    asked by Sue
  166. grade 8 math

    elena spent a week at a customer's factory in a different city. she used her debit card 19 times. for 4 of the 19 purchase, she was charged a service fee of $0.50 each. she also withdrew money from an ATM 3 times. she was charged a transaction fee of $3.50

    asked by Jake
  167. geometry

    Line AB is parallel to line CD. What is the sum of the measure of angle K and the measure of angle Y?

    asked by Brittany
  168. science

    What is the density of a copper sample that has a mass 90.0g and volume of 10g

    asked by Leslie lopez
  169. math

    Simplify 32degrees33' - 10degrees54'

    asked by Nita
  170. Chemistry

    How many mole of fe2o3 will be formed?

    asked by Daniel Miller
  171. Chemistry

    If you produce 3.5 moles of H2, how many moles of aluminum did you use in the reaction?

    asked by Tom
  172. Physics

    A block of mass 0.585 kg is placed on the end of a spring which has a stiffness of 294 N/m. It is pulled down 2.80 cm and released. What is the frequency of oscillation?

    asked by Em
  173. Phy 1004

    A= 50.0 lbs due East, B=100Lbsdue North. A+B= R,R=?

    asked by Rocio
  174. math

    jack runs 3miles in 27 minutes at this rate how long will it take him to run 10 miles

    asked by ajia
  175. Math

    Thank You Mrs.Sue that makes sense.

    asked by Kim
  176. Math

    what is the value of the x in the triangle? A) 48 B) 71 (this is my guess) C)76 D)142

    asked by trololololololololol
  177. Physics

    A pendulum with length of 80cm was set vibrating on the moon. It takes 1.08s to travel between a point of maximum velocity to the next point of velocity. What is the period of ascillation?

    asked by Wissal
  178. Physics-Lens

    The focal length of your camera lens is 70mm. It is used for taking pictures of your friend who is 1.5m tall. What is your friends distance from the lens if the image just fills the 24mm vertical dimension of the film? I tried M=hi/ho=.16 .16=di-f/f

    asked by B
  179. algebra

    Two cars leave town 150 kilometres apart at the same time and travel toward each other. One car's rate is 18 kilometres per hour more than the others. If they meet in 3 hours, what is the rate of the faster car ?

    asked by Leah
  180. chemistry

    Which process(es) affect the speed of dissolution? a.particle size and stirring only* b.stirring only c.particle size, temperature and stirring d.particle size only

    asked by Boberto
  181. Chemistry

    Water's unique properties allow it to- a.dissolve aqueous solutions b.dissolve ionic and nonpolar covalent molecules c.dissolve ionic and polar covalent molecules d.dissolve ionic, covalent and metallic molecules is it c, because i know water is polar?

    asked by Boberto
  182. math

    Blair opens his investment account with $500. He loses $15.45 the first month, and then gains $35.68 the second month. If his net gain after 3 months is $40, how much money did he gain in the 3rd month? *

    asked by billy
  183. math

    Simplify 3/8 * 1/4 / 3/4 + 1/5

    asked by Nita
  184. 5th grade math

    kate drank 42.5 gals of milk in jan and feb. if she drank 5.3 gal more in feb. how much did she drink in feb?

    asked by Bella
  185. maths

    find the area of a square whose diagonal is 8m

    asked by Nita
  186. Dosage calculations

    The physician ordered 0.5 mL of meperidine hydro chloride. The med's drug label reads 100mg/mL. The patient will receive __________? I have no idea how to do it please.

    asked by John
  187. Chemistry

    With an equilibrium constant of k=1.3 if NaOH and MgCL2 are added in stoichiometric ratio and 1.2 mol of NaOH are present at equilibrium, how much precipitate is produced (in moles)?

    asked by Bryce
  188. 6th grade math

    1.A triangle has three vertexes. Point A is (0,0) point B is (4,10) and point C is (8,0). What are the lengths of each side? 2. What is halfway between -2 and 1?

    asked by Caitlyn
  189. Geometry

    mr james has a swimming pool in his backyard that is 10 ft by 15 ft he wants to put a concrete sidewalk with uniform width around his pool so that the pool and sidewalk cover a combined area in his backyard of 336 ft ^2. What is the width of the sidewalk?

    asked by Anonymous
  190. math

    253divded by 5 estimate

    asked by ralyn
  191. Math

    Jack is going to fill his beach ball with water. The radius of the ball is 24in. How much water will it take to fill the beach ball? 4/3(3.14) 4.19 (2)^3 4.19 (8) 33.52 Instead of using 24in. I used 2ft. Instead since 24in. Equals 2 ft.

    asked by Sue
  192. Algebra 1

    One third the sum of two numbers is 10 and half the difference is 14. What is the larger number?

    asked by Dion
  193. math

    what is the product of -8 and -7

    asked by little dark one
  194. ALGEBRA

    WHAT IS OUTER SPACE

    asked by math star
  195. Algebra

    Simplify by reducing (4y^2z^3-8yz^2)/(yz^2-2z)

    asked by Heidi
  196. math

    dande and mani are 12 nd 10 years old respectively .9152.00 naira is shared between them in the ratio of their ages .how much doe dande get

    asked by Nita
  197. Geography

    Is a marsh copse a physical feature?

    asked by Stoof
  198. maths

    22degrees33' - 10degrees54'

    asked by Nita
  199. math quick question for a grade recovery portfolio

    102400 as a fraction

    asked by raNdOmPErsOn
  200. Math 5th

    Write a statement for 6+ n=2

    asked by Ls
  201. Physics

    A block with a mass of 0.357 kg is attached to a spring of spring constant 599 N/m. It is sitting at equilibrium. You then pull the block down 4.80 cm from equilibrium and let go. What is the amplitude of the oscillation? I know A=D/F... I keep getting the

    asked by Em
  202. science

    im doing a powerpoint on valleys and i need some facts if there some websites you can send me too that wood be graet

    asked by little dark one
  203. Math

    A candle burn for up to 4 hours. Which amount of time is equal to 4 hours?

    asked by Kim
  204. social studies

    spanish-america war

    asked by jelly
  205. science

    Rocky (terrestrial) refers to the

    asked by Zamya
  206. Science

    If you find a mysterious organism, how can you figure out whether or not it is a plant?

    asked by Anonymous