Questions Asked on
January 29, 2012

  1. chemistry

    For a particular isomer of C8H18, the following reaction produces 5113.3 kJ of heat per mole of C8H18(g) consumed, under standard conditions. C8H18(g) + 25/2(O2)(g) -> 8CO2(g) + 9H2O(g) DeltaH= -5113.3 kJ What is the standard enthalpy of formation of this

    asked by Mike
  2. Business Math

    Joyce took out a loan for $21,900 at 12 percent on March 18, 2000, which will be due on January 9, 2001. using ordinary interest, Joyce will pay back on January 9 a total amount of: Answer: $24,068.10 Ordinary interest is 360 March 18 = 77 days January 9 -

    asked by Liz
  3. trig

    sin2x=cos3x then sinx=?(if 0

    asked by arka bhaskar
  4. physics

    A dynamite blast at a quarry launches a chunk of rock straight upward, and 2.0s later it is rising at a speed of 15m/s. Assuming air resistance has no effect, calculate its speed A) at launch and B) 5.0s after lauch

    asked by Natasha
  5. Precalculus

    Determine the exact value of cos 465 degrees a) √3 + √2/2 b) √2 + √3√2/4 c)√2 - √3√2/4 d)2+√2-√3√2/4

    asked by Melinda
  6. physics

    A fire hose held near the ground shoots water at a speed of 5.5 .At what angle(s) should the nozzle point in order that the water land 2.0 away (see the figure )?

    asked by Anonymous
  7. Physics

    A weight lifter performs a clean and jerk on 150 kg, raising it 2 m above the ground in 1.5 s. What is his power output during the lift?

    asked by Hannah
  8. Physics

    A cannon is rigidly attached to a carriage,which can move along horizontal rails but is connected to a post by a large spring, initially unstretched, of force constant 60000 N/m. The cannon fires a 305 kg projectile at a velocity of 174 m/s directed

    asked by amanda and leah
  9. Physics

    You have 300 g of coffee at 55 degrees celcius. Coffee has the same specific heat as water. How much 10 degrees celcius water do you need to add in order to reduce the coffee's temperature to a more bearable 49 degrees celcius?

    asked by Hunter
  10. Chemistry

    1) Which of the following molecular solids will exhibit dipole-dipole intermolecular forces: NH3, BF3, I2 and H2S? a) NH3, and H2S (correct) b) NH3, BF3, and H2S (BF3 has polar bonds, but is a nonpolar molecule) c) I2 only d) BF3 and I2 e) NH3, BF3, I2 and

    asked by Hannah
  11. Physics

    A high diver of mass 65.0 kg steps off a board 10.0 m above the water and falls vertical to the water, starting from rest. If her downward motion is stopped 2.30 s after her feet first touch the water, what average upward force did the water exert on her?

    asked by Emily
  12. Precalculus

    Solve for x: 6^(x+3) - 6^x = 215. I got answer as 1, is it correct?

    asked by Jake
  13. Chemistry

    Copper has density of 8.94 and crystallizes with the face-centered cubic unit cell. Calculate the radius of a copper atom.

    asked by amy
  14. science

    Circle the term that does not belong in each of the following groupings. 1. HC1 secretion Acetyicholine Histamine Secretin Gastrin 2. Gastric emptying Slowed by fats Enterogastric reflex Solid foods 3. Cephalic phase Reflex phase Intestinal phase

    asked by Katie
  15. Business Math

    Janet Jones borrowed $3,000 on 90-day 12 percent note. Janet paid $250 toward the note on day 35. On day 80 she paid an additional $400. Using the U.S. Rule her adjusted balance after her first payments is: Answer: $2,785 Please do step by step. Thank you.

    asked by Liz
  16. O Chem

    By knowing the natural abundance of minor isotopes, it's possible to calculate the relative heights of M+ and M+1 peaks. If natural abundances are 12C - 98.9% and 13C - 1.10%, what are the relative heights, to the nearest 0.1%, of the M+ and M+1 peaks in

    asked by Anonymous
  17. Physics

    You have 300 g of coffee at 55 degrees celcius. Coffee has the same specific heat as water. How much 10 degrees celcius water do you need to add in order to reduce the coffee's temperature to a more bearable 49 degrees celcius?

    asked by Help Please
  18. Chemistry

    1. Which of the following statements concerning dipole-dipole attractions is correct? a) Dipole-dipole attraction is a weaker force than covalent bonds, being about 50% as strong. b) Dipole-dipole attractions increase as the distance between the dipoles

    asked by Hannah
  19. Physical Science

    A person dives off the edge of a cliff 33m above the surface of the sea below. Assuming that air resistance is negligible, (a) How long does it dive last? (b) and with what speed does the person enter the water?

    asked by Jessica
  20. physics

    a toy cart at the end of a string 0.70 m long moves in a circle on a table. The cart has a mass of 2.0 kg and the string has a breaking strength of 40 N. Calculate the maximum speed the cart can attain without breaking the string solution

    asked by Anonymous
  21. physics

    A tortoise can run with a speed of 0.12 m/s, and a hare can run 20 times as fast. In a race, they both start at the same time, but the hare stops to rest for 1.0 minutes. The tortoise wins by a shell (30 cm). (a) How long does the race take? (b) What is

    asked by kris
  22. General Physics Pt.2

    A proton is projected in the positive x direction into a region of uniform electric field E = -5.30*10^5 i N/C at t = 0. The proton travels 6.50 cm as it comes to rest. (a) Determine the acceleration of the proton. -5.07E13 (-i) m/s^2 (b) Determine the

    asked by LadyJ
  23. Science 7R HELP!

    variety of plants and animals I have the match each pharse with the correct term and I don't know what phrase (word) for this term please help!

    asked by Laruen
  24. physics

    a kettle turns 1000j electric energy into 350j of heated water. what is its efficiency? where is the other energy 'wasted' to?

    asked by 4611star
  25. Algebra 2

    In a quiz program, 3 questions on sprots, 3 questions on general knowledge, and 4 questions on science are printed separately on 10 cards and placed upside down. John is asked to select 2 cards at random. What is the probability of Joohn selecting 2

    asked by Dena
  26. Chemistry

    1) Which one of the following molecules is the most polarizable? a) H3C – I b) H3C – CH3 c) H3C – F d) H3C – H e) H3C – OH I chose H3C-I as the answer because the mm was the greatest. I added the mm of H, C, and I and got 141.934. Did I do this

    asked by Hannah
  27. Physics - position time graph

    The graph shows position as a function of time for 2 trains running on parallel tracks. The graph shows line A at a 45 degree angle,beginning at origin. Curve B also begins at origin, continues up and to the right (all in quadrant 1, like a sq root

    asked by Nilan
  28. college soc 120

    utilitarianism, deontology, and virtue ethics of gay marriage

    asked by john
  29. Math

    Red and blue beads are being strung to make a bracelet. How many different bracelets can be formed it each bracelet uses exactly 5 beads?

    asked by Alex
  30. Physics

    You have 300 g of coffee at 55 degrees celcius. Coffee has the same specific heat as water. How much 10 degrees celcius water do you need to add in order to reduce the coffee's temperature to a more bearable 40 degrees celcius?

    asked by Hunter
  31. chemistry

    A 9.96 mol sample of methane gas is maintained in a 0.836 L container at 296 K. What is the pressure in atm calculated using the van der Waals' equation for CH4 gas under these conditions? For CH4, a = 2.25 L2atm/mol2 and b = 4.28E-2 L/mol.

    asked by jim
  32. stat

    When a confidence interval for a population proportion is constructed for a sample size n = 100 and the value of, p = .4 the interval is based on the (Points : 1)

    asked by Anonymous
  33. chemistry

    Which of the following is an example of a chemical change (change in chemical composition) that involves starting with a liquid and ending up with a gas? Burning gasoline (combustion). Boiling acetone. A pond evaporating. Condensation of steam.

    asked by k
  34. Chemistry

    1) Which of the following properties of water can be explained using hydrogen bonding arguments? 1. its ability to dissolve most ionic compounds. 2. its high boiling point. 3. its low vapor pressure a) only 1 or only 2 or only 3 b) 1 and 2 only c) 1 and 3

    asked by Hannah
  35. physics

    Its 80 kilometers from point A to point B. Someone travels at an average speed of 40 kilometers per day and takes a negligible amount of time at point B to turn around to head back to point A. At what average speed must the person travel back to point A so

    asked by Anonymous
  36. physics

    A motorist traveling at 16 m/s encounters a deer in the road 43 m ahead. If the maximum acceleration the vehicle’s brakes are capable of is −6 m/s2, what is the maximum reaction time of the motorist that will allow her or him to avoid hitting the deer?

    asked by mo
  37. 3 grade english

    write three sentence about whales. use present tense in one sentence, past tense in one sentence, and future tense in one sentence. my son write three sentence i want did he write correct or not 1- whale willl swim to have some krill. 2- whale leaped out

    asked by dw
  38. physical science

    is the study of the moon's phases a pure or applied science

    asked by keisha
  39. basic engineering electricity

    At what current drain does the ampere-hour Energizer d cell drop to 75% of its value at 25mA?

    asked by kali
  40. chemistry

    What volume of carbon dioxide is produced when 36.7 g of calcium carbonate reacts completely according to the following reaction at 25oC and 1 atm?

    asked by jim
  41. algebra

    can you show work y +4}+ {y-3x 6} =92

    asked by Anonymous
  42. Math

    From an exterior point P that is h units from a circle of radius r, a tangent line is drawn to the circle. Let y denote the distance from the point P to the point of tangency T. Express y as a !@#$%^&tion of h.

    asked by Jennifer
  43. Statistics

    A forest fire is burning down a narrow valley 3 miles wide at a speed of 40 feet per minute. The fire can be contained by cutting a firebreak through the forest across the valley. It takes 30 seconds for one person to clear one foot of the firebreak. The

    asked by Xander
  44. Physics

    Three identical conducting spheres initially have the following charges: sphere A, 4Q; sphere B, -9Q; and sphere C, 0. Spheres A and B are fixed in place, with a center-to-center separation that is much larger than the spheres. Two experiments are

    asked by Tyler
  45. Precalculus

    1. What two common identities are most useful for simplifying 2tanx/(sin^2x + cos^2x - tan^2x)? Two identities are: sin^2x + cos^2x = 1 and tan2x=2tanx/1-tan^2x

    asked by Melinda
  46. Physics

    In a historical movie, two knights on horseback start from rest 88.0m apart and ride directly toward each other to do battle. Sir George's acceleration has a magnitude of 0.300m/s (squared), While Sir Alfred's has a magnitude of 0.200m/s (squared).

    asked by Natasha
  47. SIMILARITY

    WHAT ARE THE SIMILARITIES OF A PARK AND A PLAYGROUND?

    asked by emily
  48. 3 grade english

    write three sentence about whale. use present tense in one sentence, past tense in one sentence, and future tense in one sentence.

    asked by dw
  49. Chem

    I really appreciate the help you gave me earlier. I was wondering if you could please look over these questions for me to? The answers will always be either reactant, product or neither. 1)P4(s)+6 Cl2(g)4 PCl3(l) Which side of the reaction will be favoured

    asked by TINA
  50. Chemistry(Please check)

    1) Which of the following properties of water can be explained using hydrogen bonding arguments? 1. its ability to dissolve most ionic compounds. 2. its high boiling point. 3. its low vapor pressure a) only 1 or only 2 or only 3 b) 1 and 2 only c) 1 and 3

    asked by Hannah
  51. Chemistry

    When a color television is on for 2.0 hours, 290 KJ are used. How long can a color television run on the energy from 1.0g of gasoline/

    asked by Cindy
  52. Math

    If the principal P = $900, the interest I = $882, and time t = 7 years. What is the rate? What is the future value?

    asked by Monica
  53. Calculus

    Let R be the region bounded by y=x^2, x=1, and y=0. Use the shell method to find the volume of the solid generated when R is revolved about the line x=-11.

    asked by Becca
  54. Chem

    I have 4 questions, I got the answer for three of them and just want you to check and see if they are right and i do not know the answer to the fourth one. 1)4HCl(g)+O2(g)2H2O(g)+2Cl2(g)+114.4 kJ Which side of the reaction will be favoured by an decrease

    asked by TINA
  55. Physics

    How do you find the acceleration of an object on a velocity-time graph if the acceleration of the object is at t = 5 s in m/s2?

    asked by Paige
  56. physics

    A car is traveling at Vx =20 m/s. The driver applies the brakes, and the car slows with ax = -4m/s^2. What is the stopping distance

    asked by larry
  57. Physics

    You have 300 g of coffee at 55 degrees celcius. Coffee has the same specific heat as water. How much 10 degrees celcius water do you need to add in order to reduce the coffee's temperature to a more bearable 49 degrees celcius?

    asked by Help Please
  58. Learning Strategies

    You should study the modules you receive for course in the ordr provided in your A.STUDENT HANDBOOK b.PROGRAM OUTLINE C.STUDY UNIT D.STUDY GUIDE I chose (B) CAN SOMEONE TELL ME IF THAT IS RIGHT.

    asked by Brenna
  59. English 7 - Essay Check

    Perseverance means to never give up during difficult times. For example, people may choose to persevere after experiencing a serious injury. Rosa Parks is a former civil rights leader. Rosa Parks’ words and actions showed that she persevered in

    asked by Laruen
  60. Chemistry

    Mass of unknown solution=25.671 Mass ethanol =8.243 Assuming that prior experiments have shown the single-step extraction removes only 72.0 % of the ethanol, the mass of ethanol in your original unknown is 11.45 Mass percent ethanol =44.6 % Given a density

    asked by Forrest
  61. algebra

    I AM TRYING TO SOLVE A SYSTEM OF EQUATIONS BY GRAPHING AND CAN GET THIS ONE. 3x + y = 2 4y = 12 - 12x HOW DO YOU DO THIS?

    asked by dawn
  62. Center

    How is the efficiency of pushing a concrete block up a wooden ramp increased

    asked by Mike
  63. psychology

    Stress has the ability to cause the immune system to: (Points: 5) be under stimulated. attack rather than support the body. repair itself. increase its resources.

    asked by o
  64. Physics

    A cannon is rigidly attached to a carriage,which can move along horizontal rails but is connected to a post by a large spring, initially unstretched, of force constant 60000 N/m. The cannon fires a 305 kg projectile at a velocity of 174 m/s directed

    asked by amanda and leah
  65. psychology

    According to behavioral treatment approaches, abnormal behavior is learned through: (Points: 5) thoughts based on the perception of events. vicarious experiences. rewards and punishments. conflict experiences in early childhood.

    asked by o
  66. math

    The day started out at 16 F and ended at 25 F. Find the percent change for the temperature throughout the day?

    asked by matt
  67. english

    why is certification and censorship of films and programmes is necessary? - include children are immpressionable and my copy what they see - children are weak minded - shocks elderly

    asked by 4611star
  68. Biology

    What is the function of water in cellular respiration and photosynthesis? Detailed answer please

    asked by Lisa
  69. Mathematics

    A pilot flies a plane that averages approximately 210 km/hr. The plane leaves point A at a bearing of 40 degrees and flies two hours to point B. After a brief stop the plane leaves point B at a bearing of 125 degrees and flies for another 30 minutes before

    asked by Jaskiran
  70. psyhics

    A ball is dropped from the top of a 95 m building. With what speed does the ball hit the ground?

    asked by kyle
  71. physics

    ehy can't a machine be 100% efficient?

    asked by 4611star
  72. Precalculus

    Verify these answers please. 1. Which of the following functions would f(x) = log(base 10)x horizontally 4 units to the left? a) f(x)=log(base10)(x-4) b) f(x)=4Log(base10)X c) f(x)=log(base10) x+4 Answer: C ------------------------------------ 2. State the

    asked by Melinda
  73. Science 7R

    the most complex organisms are (a.) animals b. bacteria c. fungi d. protists i choose a am i correct?

    asked by Laruen
  74. chem

    Ok so for question I have to state whether the element/compound is an acid, base, conjugate acid or conjugate base. Can u please tell me if i am correct and help me out with the ones i am unsure what the answer is? 1)S^2-(aq)+HCl(aq)Cl^1-(aq)+HS^1-(aq)

    asked by Erik
  75. Physics

    What equation gives the velocity as a function of time for an object with constant acceleration?

    asked by Natasha
  76. ThankYou Reiny!!!

    Thank you!

    asked by Betty
  77. Algebra 2

    a bag contains 3 red marbles and 6 green marbles a marble is drawn and then replaced a second marble is drawn and replaced and then a third marble is drawn . What is the probability that a red marble is drawn all 3 times?

    asked by Susan
  78. physics

    What equation gives the position as a function of time for an object with constant acceleration?

    asked by Natasha
  79. physics

    A person desires to reach a point that is 1.70 km from her present location and in a direction that is 40.0° north of east. However, she must travel along streets that are oriented either north-south or east-west. What is the minimum distance she could

    asked by frank
  80. 2nd Semester

    2nd Semester begins tomorrow and I won't be having art anymore I'm having facs. So is there any useful tips you teachers would like to give me to get me a head start next semester. there are tons of things next semester passport day at my school, exams,

    asked by Laruen
  81. physics

    A brick is thrown upward from the top of a building at an angle of 40° to the horizontal and with an initial speed of 16 m/s. If the brick is in flight for 3.4 s, how tall is the building?

    asked by kaf
  82. English

    Can you please check these sentences? I find it difficult to rephrase to sentences. Thank you. 1) thank you very much for helping me with my school search. 2) In the blog I noticed that your colleague wrote that the involved students come from the fifh and

    asked by Henry2
  83. geography

    1. What country possesses Easter Island off the coast of South America? Chile 2. What is the westernmost state in the United States? Alaska 3. What forms the natural boundary between Argentina and Uruguay? The Uruguay River 4. What is the name of the

    asked by Reed
  84. ANATOMY

    the three major vessels of the portal triad are the hepatic artery, hepatic portal vein and bile duct. What is the location of the triad relative to the liver lobules?

    asked by Katie
  85. Precalculus

    Given the parent function f(x)log(base10)x, state the equation of the function that results from a vertical stretch by a factor of 2/5, a horizontal stretch by a factor of 3/4, a reflection in the y-axis , a horizontal translation 2 units to the right, and

    asked by Melinda
  86. ecology

    In what environments would you expect obligate homeotherms to have the most significant advantages, and in what environments might facultative homeotherms have an edge?

    asked by Jay
  87. Chemistry

    1) Three factors control the rate of evaporation of a liquid: surface area, temperature, and strengths of intermolecular forces. More than one of the statements given described a correct effect. The statements are (1) the larger the surface area, the

    asked by Hannah
  88. algebra

    find the slope of a straight line that passes through the given pair of points (5,6) and (-3,1)

    asked by Brandy
  89. statistics

    you are given 9 to 1 odds aganist tossing three heads with three coins, meaning you win $9 if you succeed and you lose a $1 if you fail

    asked by Maureen
  90. Math

    If REINY was reading story problems and if he did not know the algorithm steps to share to a simple problem, would he have time to be sarcastic?

    asked by john
  91. Chemistry(Please check)

    1) Which one of the following molecules is the most polarizable? a) H3C – I b) H3C – CH3 c) H3C – F d) H3C – H e) H3C – OH I chose H3C-I as the answer because the mm was the greatest. I added the mm of H, C, and I and got 141.934. Did I do this

    asked by Hannah
  92. accounting

    where on a t account would I post completed a consulting engagement and received cash of 7800

    asked by Kendra
  93. physics

    A person lifts a 199 Newton stack of books 12 meters high in 7 seconds. How much power is used to lift the books?

    asked by christy
  94. Physics

    A rowboat passenger uses an oar to push the boat off the dock by exerting a force of 60.0 N for 2.0 s. What impulse acts on the boat?

    asked by Pat
  95. english

    could you pl correct the following sentence : nobody is understanding what is the problem our teacher has just explained

    asked by R S Telagathoty
  96. Algebra II

    What is the simplified version of (2x^(-3)y^(2))^(-2) and (z^4)/(2z^3) Thanks!

    asked by Steven
  97. Precalculus

    Explain how to do these please. 1. solve x=log(base2)*1/8 by rewriting in exponential form. 2. Solve log(3x+1)=5 3. Solve log(base x)8=-1/2

    asked by Melinda
  98. Physics

    You have 300 g of coffee at 55 degrees celcius. Coffee has the same specific heat as water. How much 10 degrees celcius water do you need to add in order to reduce the coffee's temperature to a more bearable 49 degrees celcius?

    asked by Hunter
  99. math

    the record hight temperature for a date is 100.5 degrees above zero what is the correponding number of the sentence

    asked by mite
  100. language arts

    Where is the comma needed in the sentence? After traveling to Bryce Canyon, Utah, Karen drove to Canyonlands National Park, Utah, where she took pictures of the sandstone formation. I put in the commas already, I just want to know if this is correct

    asked by riley
  101. Precalculus

    Evaluate log(Base4) ^3sqrt64 (The ^3 is an exponent infront of sqrt 64) I keep getting wrong answer :|

    asked by Jake
  102. algebra

    what is 4x-15/2=1/2

    asked by lizzy
  103. criminal justice

    Describe occupations, agencies, or departments that you think may profit from actual or perceived increases in crime.

    asked by sharday
  104. physics

    a hairdryer turns 250J of electrical energy into 50J of heated air. how efficient is this machine and how much is wasted to sound?

    asked by 4611star
  105. criminal justice

    In your opinion, do people other than criminals profit from crime? Who are these people and how do they profit from crime

    asked by sharday
  106. chem

    Ok so i looked at it and tried to figure out the conj. base and acid. Are these right? 1) S2-(aq) + HCl(aq) Cl1-(aq) + HS1-(aq) This is what I think it is: Acid = HCl Base = S^2- Conjugate acid =HS^1- Conjugate base = Cl^1- 2) H2O2(aq) + PO43-(aq)

    asked by Erik
  107. physics

    why can't a machine be 100% efficient?

    asked by 4611star
  108. COLLEGE MATH- SYSTEMS OF EQUATIONS

    1. Solve these systems of equations a. 3x + 6y + 3z= 3 2x - y + 4z= 14 x + 10y + 8z= -8 b. x + y + 3z= 10 x + 2y + 3z= 4 x + 4y + 3z= -6 2. Solve these systems of equations word problems. a. A movie theater sold 450 tickets to a movie. Adult tickets cost

    asked by LimaBeans93
  109. math

    mallory emailed a funny cartoon to Ann. she told ann to send it to five friends with instructions for each of them to send it to five other friends. after four cycles of emailing,how many cartoons will have been sent? the answer is 156 but i don't know how

    asked by lisa
  110. English - Native speakers

    Hello I have a question concerning the following sentence: Teachers are these days very patient and give more information and they explain it better. Can we say explain them better also? Which one is correct?

    asked by Mark
  111. chemistry

    Which of the following is a situation where an object’s potential energy varies as a result of changes due to its chemical composition? The melting of ice. The burning of wood. A ball rolling down a hill. A parachute slowing a skydiver's fall.

    asked by k
  112. engineering

    an airplane was moving with a velocity equal to 300 mph when the velocity was increased with uniform acceleration to 600 mph in 5 min. calculate the number of miles the airplane traveled during that interval of time

    asked by Anonymous
  113. chemistry

    A sample of steam with a mass of 0.552 and at a temperature of 100 condenses into an insulated container holding 4.35 of water at 6.0. Assuming that no heat is lost to the surroundings, what will be the final temperature of the mixture?

    asked by amy
  114. chemistry

    Find the mass of urea needed to prepare 51.7 of a solution in water in which the mole fraction of urea is 7.80×10−2.

    asked by amy
  115. physical education

    I'm doing a gym project on some terms. I need to find pictures for each term. What would be a good picture to represent the words, target zone and resting heart rate?

    asked by brielle
  116. physics

    A golfer hits a shot to a green that is elevated 3 m above the point where the ball is struck. The ball leaves the club at a speed of 15.6 m/s at an angle of 41.4° above the horizontal. It rises to its maximum height and then falls down to the green.

    asked by Anonymous
  117. 7th grade science

    What are mass extinctions?

    asked by saranghae12
  118. Chemistry

    If 35cm cube of gas is heated from 14 degree celsius to 55 degree celsius.what is the new volume?

    asked by Samuel
  119. Marketing

    How does Tropicana use the marketing mix? By marketing mix, I am referring to the 4 P’s of Marketing- Price, Product, Place and Promotion

    asked by Christopher
  120. English

    I need to improve the objectives I wrote for my Comenius project. Can you please help me? They must be persuasive. 1)to increase the students’ general knowledge and understanding of concepts, procedures and attitudes by involving them actively and

    asked by Henry2
  121. English

    Here is the second part I need you to check. Thank you. 1)To maximize the use of a wide range of Information and Communication technologies (I want to make it more specific: how do modern students communicate?) as well as of English as a medium of

    asked by Henry2
  122. Physics

    Can you think of any ways to measure instantaneous speed directly?

    asked by Natasha
  123. physics

    The punter on a football team tries to kick a football so that it stays in the air for a long "hang time." If the ball is kicked with an initial velocity of 24.8 m/s at an angle of 62.5° above the ground, what is the "hang time"?

    asked by Anonymous
  124. math

    tickets to a school play cost 1.5 in advance and 2.0 at gate. by selling all 200 tickets students got $360. how many tickets did they sell in advance?

    asked by sonia
  125. Math

    How do I set this up and solve? You are planing a rectangular dining pavilion. Its length is 3 times its width x. You want a stone walkway that is 3 ft wide around the pavilion. You have enough stones to cover 396 ft squared and want to use them all in the

    asked by Jane
  126. Biochemistry

    1. MES (2-(N-Morpholino)ethanesulfonic acid) is a common buffer used in biochemistry labs to stabilize proteins. The pKa for MES is 6.09. a. What is the pH of 1 liter of a 200 mM MES aqueous solution? Clue: you will need to solve a quadratic equation. (2.5

    asked by Peter
  127. Spanish-Please check my work

    Could someone please check this for me. I had to rewrite the following sentence using a direct object pronoun in two different ways. I wrote: Nosotros queremos leerlos. Los hosotros queremos leer. Thank you for checking

    asked by Jillian
  128. math

    The perimeter of the triangle is 40 inches. If you wanted to construct a similar triangle with a perimeter of 50 inches, what would be the length of the shortest side of the triangle?

    asked by Megan
  129. Biology

    write a paragraph describing the importance of dna to science, medicine, and all living organisms

    asked by Sana
  130. algebra

    Annual profit in thousands of dollars is given by the function, P(x) = -.1x2 + 50x - 300, where x is the number of items sold, x ¡Ý 0. find the profit for 5 different values of x

    asked by Betty
  131. American Government

    What do America's founding principles have roots in?

    asked by Carol
  132. Spanish 8th grade

    I have a question about describing my house. I know the word is viejo for old, nuevo for new and modern is moderno. If I say Mi casa is modern do I say Mi casa is modena by changing the "o" to the feminie "a". The same for viejo if I describe my house

    asked by Matt C.
  133. math

    A statue is made of a mixture of copper and zinc in a ratio of 11:4 (copper to zinc). If the weight of the statue is 3165 pounds, what is the weight of the copper?

    asked by Megan
  134. Physics

    An 18-year-old runner can complete a 10.0-km course with an average speed of 4.39 m/s. A 50-year-old runner can cover the same distance with an average speed of 4.27 m/s. How much later (in seconds) should the younger runner start in order to finish the

    asked by Natasha
  135. Business

    Select an organization with which you are familiar and discuss the impact of that organization’s level of social responsibility on a stakeholder group of your choice

    asked by cynthia
  136. Culinary arts

    What does the term coving mean?

    asked by Brooke
  137. Precalculus

    What two common identities are most useful for simplifying 2tanx/sin^2x + cos^2x - tan^2x? Two identities are: sin^2x + cos^2x = 1 and tan2x=2tanx/1-tan^2x

    asked by Melinda
  138. painting

    Write a 500- to 700-word summary that compares and contrasts Neoclassicism, Impressionism, and Abstract Expressionism. Use the selected artwork as your examples. Include the following in your discussion:

    asked by nathan
  139. Physics

    Directly below on the floor is a stationary 428-Hz source of sound. The microphone vibrates up and down in simple harmonic motion with a period of 2.3 s. The difference between the maximum and minimum sound frequencies detected by the microphone is 2.2 Hz.

    asked by Claire
  140. English

    Thank you. Here are the sentences again for you to check At the end of the two-year program students should be able to... 1)maximize their use (or upgrade their knowledge) of a wide range of Information and Communication technologies (I want to make it

    asked by Henry2
  141. c b n

    can you pl explain the impacts precautions once you are affected by cervico brachial neuralgia

    asked by R S Telagathoty
  142. math

    Integers of 81? 1,3,9,27,81 is this right please let me know

    asked by Andy
  143. Trigonometry

    What representations do not change the location of the given point (7,140°)?

    asked by Kelvin
  144. 5 grade science

    what was your hypothesis? explain the process that your followed to determine the results for your experiment.

    asked by dk
  145. physics

    A flowerpot falls from a window sill 25.3 m above the sidewalk. What is the velocity of the flowerpot when it strikes the ground? The acceleration of gravity is 9.81 m/s 2 . Answer in units of m/s How much time does a passerby on the sidewalk below have

    asked by shay
  146. business

    Can somebody explain what organizational structure of a company means? I read the definitions, but I still do not understand it.

    asked by Brenda
  147. gastro

    could you pl explain in detail the following ailment or diagnosis called METAPLASIA how it could be cured and all

    asked by R S Telagathoty
  148. physical science

    Joe baked a cake for his mother's birthday. When he removed the cake from the oven, Joe noticed that the cake had not risen. Joe guessed that the baking powder he had used was too old. He designed the following experiment to test his idea. Joe prepared two

    asked by keisha
  149. 7th grade science

    what are intermediate forms of species for gradualism and punctuated equilibria? Please help!! Thank you!!

    asked by saranghae12
  150. math

    admission to a park is $5 for an adult ticket and $1 for a child. If $100 was collected and 28 admissions were sold on a day, how many tickets were sold and how many child tickets were sold

    asked by chris
  151. Chemistry

    How many grams of CO2 are formed when 32 g of O2 reacts with 23 g of C2H5OH?

    asked by Bob
  152. English- Infinitive phrases

    For this question, the directions say to name the TWO infinitive phrases in this sentence... His wish to succeed as an architect made him work hard. I know that "to succeed as an architect" would be one infinitive phrase, but there isn't another "to" ? So

    asked by Erica
  153. 5 grade english

    write about your actions your observations and your thoughts. remember you are the person(michael jackson) my son say that you have to pretend that your michael jackson and to write about your actions your observation and your thoughts. but you have to do

    asked by dk
  154. Time

    January 29, starting at 10:00 AM Pacific (1:00 PM Eastern) What time is it in central time?

    asked by Andrew
  155. physics

    How long is a rocket in the air if it is shot at an angle of 55¢ª with an initial velocity of 25 m/s and traveled for 88 m

    asked by Kristi
  156. math-geometry

    what does a caster net of a 4th of a 3D circle look like

    asked by shahriar alam
  157. physics

    A lever uses a force 212 Newtons to move a rock that weighs 2000 Newtons. What is the mechanical advantage?

    asked by christy
  158. algebra

    Use scientific notation to divide the following two numbers. Express the answer using scientific notation; retain at least three decimal places. (6.2 · 10^7) / (4.15 · 10^3)

    asked by jackie
  159. calculus

    A plane flying along a straight path loses altitude at the rate of 1000 ft for each 5200 ft covered horizontally. What is the angle of descent of the plane? (Round your answer to one decimal place.)

    asked by Sam
  160. physics

    A tennis ball is thrown vertically upward with an initial velocity of +7.5 m/s. What will the ball’s velocity be when it returns to its starting point? The acceleration of gravity is 9.81 m/s 2 . Answer in units of m/s How long will the ball take to

    asked by shay
  161. Physics Help Please

    Suppose a 65-kg person can run 1000m in 5min. Assume that each stride is 1.5m long, and with each stride the runner must supply an amount of energy equal to her kinetic energy. How much energy (in food calories) is required to run 1km? Is your answer

    asked by Haylee
  162. Physics

    An object moving to the right has a positive acceleration which is decreasing. Is this object speeding up or slowing down? Explain why? Please helppp

    asked by Anonymous
  163. Math

    Please let me know if I figured this out correctly. Directions: Find the slope of a line perpendicular to the graph of each equation. 1) y= -x/5 - 7 Answer: Slope = 5 2) 2x + 3y=5 Answer: Slope = 3/2 Thank you!

    asked by Kate
  164. physics

    If the roller coaster track has a hill at the end that was equal in height to the original hill, would the marble make it all the way to the top? Please explain it to me! Thanks.

    asked by alz
  165. Physics

    The treasure map in the figure gives the following directions to the buried treasure: "Start at the old oak tree, walk due north for 490 paces, then due east for 120 paces. Dig." But when you arrive, you find an angry dragon just north of the tree. To

    asked by Jordan
  166. ochem

    In a sn2 reaction why do we need sp3 hybrid orbital and not sp2 for the substrate

    asked by lou
  167. chemistry

    How many MOLES of oxygen are present in 6.56E+22 molecules of nitrogen monoxide

    asked by Anonymous
  168. math-word problem

    admission to a park is $5 for an adult ticket and $1 for a child. If $100 was collected and 28 admissions were sold on a day, how many tickets were sold and how many child tickets were sold

    asked by chris
  169. math

    what is the function if x is 3,0,7,5 and the y being 16,10,24,20?

    asked by makayla
  170. chemistry

    How many MOLES of oxygen are present in 6.56E+22 molecules of nitrogen monoxide How many ATOMS of nitrogen are present in 1.79 moles of nitrogen monoxide ?

    asked by Anonymous
  171. macroecon

    Which of the following are considered by economists to be "land"? I. The 50 acres he uses to grow corn II. The 40 acres he uses to graze sheep III. The 10 acres on which he has built his house and barn IV. The sheep that graze on his farm V. His house and

    asked by Anonymous
  172. 5 grade english

    write about your actions your abservations and your thoughts. remember you are the person.(Michael Jackson)

    asked by dk
  173. statistics

    Someone who has never seen a normal die before decides to estimate the mean value of all its faces (μ) by rolling it many times. First, they are told that the standard deviation is σ = 1.7. Then, they roll the die 50 times and get a sample mean of x-bar

    asked by Nadia
  174. CPR

    Is there a website where you can find a video for the AHA 2012 CPR? AHA changed the CPR. -Thanks, Tia

    asked by Tia
  175. 3 grade math

    write to explain- when you divide 24 by 6, what fraction of 24 are you finding? find the answer.

    asked by dw
  176. science

    what does oxytetracycline contain that would destroy bacillus cereus

    asked by martha
  177. geography

    Which great lake is closest to Michigan?

    asked by lizzy
  178. biology

    I have to do a line graph showing generation time every 20 mins a cell diving upto 360 mins. using binary fission . am getting mixed up how to mark it down on two axis.9 boxes with mini boxes of 10 in axis i was going to use for time and vertical axis has

    asked by sharon
  179. science

    A ball moving eastward with a velocy of 15m/sec bounces off a wall with a velocity of 12m/sec in the opposite direction.If the mass of the ball 200g.Calculate the change in the ball's momentum

    asked by Zama
  180. Algebra 2

    a bag contains 3 red marbles and 6 green marbles a marble is drawn and then replaced a second marble is drawn and replaced and then a third marble is drawn what is the probability that a red marble is drawn all 3 times?

    asked by Anonymous
  181. Business Finance

    Earl Miller plans to buy a boat for $19,500 with an interest charge of $2500. Earl figures he can afford a monthly payment of $650. If Earl has to pay 36 equal monthly payments, by how much can he afford the boat per month?

    asked by Terry
  182. program planning and evaluation

    Please respond to the following questions either by writing the design name or by describing the design using standard notation (X = program, O=observation, R= random assignment). For each design, please discuss all threats to internal validity. 1. a.

    asked by ihuoma okoro
  183. chemistry

    What is the percent by mass of H in ethyl alcohol (C2H6O)? The molecular weight of carbon is 12.0107 g/mol, of hydrogen 1.00794 g/mol, and of oxygen 15.9994 g/mol. Answer in units of % Your answer must be within ± 0.1%

    asked by tyeisha colley
  184. Math

    I need $35,000 in 5 years @ 3% interest. How do I calculate how much I need to put in each month to make it.

    asked by Sherri
  185. Business Finance

    The property on Al's garage is worth $300,000. Al has a fire insurance policy of $180,000 that contains an 80% coinsurance clause. What will the insurance company pay on a fire that causes $210,000 damage? If Al met the coinsurance requirement, how much

    asked by Terry
  186. math

    what is the net of a 3D quarter of a circle look like

    asked by shahriar
  187. bio

    why does 10 % Sodium Chloride Solution affect and kill Sarcina lutea but not Serratia marcescens Escherchia coli Bacillus subtilus Bacillus cerus? I am trying to find some evidence of why but can't. It is true though because I tested it in a lab.

    asked by rebekah
  188. human services

    Please let me know if I am correct. An example of criterion validity is when a human service professional uses a scale to measure risk of suicide. If the scale is valid it should correlate with the occurence of negative behaviors which harm one self

    asked by Anonymous
  189. algebra

    the cost of renting a car is #22 a day plus 20 cents per mile. How far can May drive in one day if she only has $108?

    asked by tere
  190. Physics

    How do you find the acceleration of an object on a velocity-time graph if the acceleration of the object is at t = 2 s in m/s2?

    asked by Paige
  191. chem

    write an equation for which component of the phosphate buffer (H2PO4-/ HPO4^2-) reacts when HCl is added. Do the same for NaOH. I think that the H2PO4- will react with the NaOH but its only a guess and I'm confused as to how I would go about doing this.

    asked by jean
  192. human services

    can you give me an example of content validity.

    asked by Anonymous
  193. math

    the length of a retangle is twice the width.the area is 200yd^2??? Can someone help me please!!!!!find the lenght and width

    asked by chelsea
  194. Physical Science

    If there were no air resistance, a quarter dropped from the top of New York's empire state building would reach the ground 9.6 seconds later, what would its speed be? How high is the building?

    asked by Brody
  195. math

    give exact and approximate to three decimals places x^2+8x+16=25 Please help me solve this

    asked by chelsea
  196. Physics

    An object moving to the right has a positive acceleration which is decreasing. Is this object speeding up or slowing down? explain why?

    asked by Anonymous
  197. Geometry

    Z is between I and P. Solve for x and find IP. IZ= 3x+5 ZP= 4x+13 IP= 15x-22

    asked by Monique
  198. algebra

    the number of people the school can hold is at most 200. how can i present this in inequality is this correct x=

    asked by aj
  199. Social - Studies

    What was the life for the African slaves on the sugar plantation in Guyana?

    asked by Sasha
  200. English Lit

    I have a question about Henry II. What did he do that solidified his power as king but led to economic problems and helped incite conflict with the church. The possible answers are: Executed all Bishops who were opposed to his rule Gave enormous finiacial

    asked by Emily
  201. Marketing Management

    What are some market conditions that can influence a firm decision to enter foreign markets?

    asked by Anonymous
  202. PHYSICS

    You have 300 g of coffee at 55 degrees celcius. Coffee has the same specific heat as water. How much 10 degrees celcius water do you need to add in order to reduce the coffee's temperature to a more bearable 49 degrees celcius?

    asked by Hunter
  203. SOSO

    what ARE the similarites and differences between parks and playgrounds!

    asked by emily
  204. Matheematics: Circles And Circumference

    you have two coins with a total circumference of 116.18 millimeters. How much money do you have? Please Help

    asked by Ayana Reid
  205. Math

    Please let me know if I figured this out correctly. Directions:Write an equation for the line that is perpendicular to the given line and that passes through the given point. 1) y=x-3; (4,6) Answer: y=-x-10 Thank you!

    asked by Kate
  206. Chemistry

    A robust first grader goes for swimming lessons three times a week, and he enjoys it thoroughly. During the first week of December, he develops an upper respiratory infection, starts coughing continuously, and has a high fever of 39°C. His condition

    asked by Nikki
  207. arithmetic

    write 14 over 4000 as a decimal

    asked by tish
  208. Math

    A circular flower bed has a radius of 33.2 m. An insect crawls around the edge of the flower bed at a rate of 2 meters per minute. About how long does it take the insect to crawl around the flower bed?

    asked by Desmond
  209. algebra

    5x^3y25x^2y

    asked by Anonymous
  210. Physics

    A spaceship lifts off from the Earth with constant acceleration. 9 seconds into the flight, a small piece of the ship breaks off and falls back to the Earth. If the piece hit the ground 11.5 seconds after breaking off from the spaceship, what is the

    asked by Kayla
  211. geometry

    for paralleogram ABCD, m

    asked by Jayce
  212. Chemistry

    1) The order of the boiling points for the hydrogen halides, except for HF, is HI > HBr > HCl. The reason for this order can be attributed to a) the relative covalent bond strengths. b) differences in hydrogen bonding. c) differences in dipole-dipole

    asked by Hannah
  213. business

    I need help Describing the organizational structure for Walmart.

    asked by Mark
  214. Algebra

    Please Check these P(x)= -.1(100)^2 +50(100)+300= 3,700,000 P(x)= -.1(150)^2 +50(150) +300= 4,950,000 P(x)= -.1(250)^2 +50(250) +300= 5,950,000 P(x)= -.1(350)^2 +50(350) +300= 4,950,000 P(x)= -.1(450)^2 +50(450) +300= 1,950,000

    asked by Betty
  215. Chemistry

    What is the molar mass of hydrogen gas, H2?

    asked by Liz
  216. Physics

    Soccer player kicks a ball down field. The ball's initial velocity is 30 m/s, 30 degrees above horizontal. a) What is the ball's horizontal velocity at the maximum height of the ball's trajectory? b) What is the horizontal displacement of the ball just

    asked by Sejul
  217. College Algebra

    Annual profit in thousands of dollars is given by the function, P(x) = -.1x2 + 50x - 300, where x is the number of items sold, x ¡Ý 0. 1.describe the meaning of the number -.1 in the formula 2.describe the meaning of the number -300 in the formula 3.find

    asked by Ruth
  218. Trigonometry

    What representations do not change the location of the given point (7,140°)?

    asked by Kelvin
  219. Chemistry

    Calculate the energy in kJ/mol of a mol of photons in the ultra-violet region of the electromagnetic spectrum that has a wavelength of 2.88 × 10-7 m. Express answer in scientific notation. I got 4.16 * 10^8 but the correct answer is supposed to be 4.16 *

    asked by Kyle
  220. Physics

    A 20.0kg curling stone at the hog line and moves 28.35m [west] to sit on the button and score a point. If the coefficient of kinetic friction between the stone and the ice is 0.00200, what was the initial speed of the stone when it was released?

    asked by lola
  221. physics

    The summit of a mountain, 2270 above base camp, is measured on a map to be 4610 horizontally from the camp in a direction 30.9 west of north.What are the components of the displacement vector from camp to summit? Choose the axis east, axis north, and axis

    asked by Anonymous
  222. Chemistry

    1) Given the following “substances” and their normal boiling points, in celsius. G:43.8 Celsius J:93.7 M:56.7 T: 83.5 R:63.6 Which set below correctly lists some of these liquids in order of increasing intermolecular forces at 20 oC? a) G < R < J b) J

    asked by Hannah
  223. Business (Legal Environment of Business)

    Edward received unsolicited faxes from Direct Access in violation of the Federal Telephone Consumee Protection, Act, which makes it illegal to send unsolicited faxes. Edwards, a Nevada resident, sued Direct, not a Nevada resident, in state court in Nevada

    asked by shirley
  224. chemistry

    1228g/l to g/ml

    asked by jaquesha
  225. Physics

    A diagram has vector A at 30 degrees above the positive x axis. length = 3 m Vector B is ON the negative x-axis. length = 1 m Vector C is ON the negative y-axis. Length is 2 m What is the direction in degrees of vector a + vector B + vector C?

    asked by Sushmitha
  226. Marketing Management

    What is the role of the WTO and economic communities in encouraging free trade?

    asked by Amy
  227. alg2\trig

    if a3= 17 & a8=37 are terms in annarithmetic sequece, fina a1 & d. the answer is a1=9 & d=4 but i don't understand how they got the answer, please help!

    asked by dianela
  228. Physics

    A(n) 5.52 g bullet is fired into a(n) 3.07 kg ballistic pendulum and becomes embedded in it.The acceleration of gravity is 9.8 m/s^2. If the pendulum rises a vertical distance of 4.48 cm, calculate the initial speed of the bullet. Answer in units of m/s

    asked by amanda and leah
  229. math

    what is the net of a circle

    asked by shahriar
  230. Marketing

    Can you give me an example of a product and its marketing mix? By marketing mix, I am referring to the 4 P’s of Marketing- Price, Product, Place and Promotion For example like Yoplait, but I am not sure how the company uses the 4 P’s

    asked by Savannah
  231. Algebra

    Identify any holes and vertical asymptotes of the graph of the equation y=6x^2-2/3x^2+17x+10 ?

    asked by Brecken
  232. English

    As promised, I'm posting you the 5 sentences to be checked. 1) Thank you very much for helping me with my school search. 2) Your colleague wrote in her blog that the involved students come from the fifh and sixth classes. Actually, they are between sixteen

    asked by Henry2
  233. Algebra

    Find the value of y so that the line passing through the two point has the given slope. (2,y) (4,5) m=5 (m=slope) how do you do this?

    asked by Lee
  234. Chemistry

    1) Determine the value of delta H net for the following equation: SnBr2(s) + TiCl4(l) -> TiBr2(s) + SnCl4(l) I am not sure how to solve this.

    asked by Hannah
  235. Physical Science

    Three balls (see below) are dropped simultaneously from the 40th floor of a tall building into the air below. A) In what order will they hit the ground, or will they arrive at the same time? B) Provide an explanation for your answer above. Ball A (softball

    asked by Aubree
  236. Math

    Sam rolls a standard die, and then Ruth rolls the same die. The probability that Ruth's number is higher than Sam's can be written as a/b where a and b have no common factors greater than 1. Find a.

    asked by Theo
  237. math

    find the maximum profit of P(x)=4000-(1000/(x-2))

    asked by larren
  238. math

    if the surface area of the sphere is 154 cm, find its volume.

    asked by sainath
  239. math

    if it takes 1/2 hour to clean 1/8 mile, how long will it take to clean 2.5 miles

    asked by Liam
  240. Math

    Every day Sally saved a penny, a dime, and a quarter. What is the least number of days required for her to save an amount equivalent to an integral number of dollars?

    asked by Eli
  241. Physics

    A water pistol aimed horizontally projects a stream of water with an initial speed of 5.65 m/s. How far does it travel before dropping a vertical distance of 1.50 cm?

    asked by anonymous
  242. pharmacology

    1. Which one of the following drugs would you instruct a patient to take during a fasting period? A. Buspirone; B. Probucol; C. Lisinopril; D. Oxcarbazepine I think B. 2. You're training a new employee. He wants to know how to determine which needle to use

    asked by Alisha221
  243. algebra

    parking lot had a length that is 7 yards greater than thre width. the area of the lot is 450 square yards. what is the length and width?

    asked by bob
  244. goverment

    which region of the nation receives the highest percentage of its revenues form the federal goernment> a. south b. northeast c. northeast e. west

    asked by tdp
  245. math

    When you roll a quarter on its edge, how far does it travel with each complete revolution?

    asked by Aundria Flecher
  246. Human Service

    Can anyone help me answer these question What was Jan Adams view of teaching and what it should accomplish? what was Jane Adams view of how men and women should care about each other.

    asked by RT
  247. Biology

    During the cell cycle, if the cell detects that mistakes have been made in replication, the cell may die by apoptosis. True/False

    asked by Jaxon
  248. chemistry

    What volume of hydrogen gas is produced when 19.6 g of sodium reacts completely according to the following reaction at 25oC and 1 atm? sodium (s) + water (l) sodium hydroxide (aq) + hydrogen (g)

    asked by amanda
  249. Physics

    An object moving to the right has a positive acceleration which is decreasing. Is this object speeding up or slowing down? Explain why?

    asked by Anonymous
  250. Physics

    Three charged particles form a triangle: particle 1 with charge Q1 = 84.0 nC is at xy coordinates (0, 4.60 mm), particle 2 with charge Q2 is at (0, -4.60 mm), and particle 3 with charge q = 40.0 nC is at (6.40 mm, 0). What are the x component and y

    asked by Tyler
  251. statistics

    find the probability of by taking a coin tossed 50 times

    asked by jutika
  252. Algebra(please Proof Read

    P(x)= -.1(100)^2 +50(100)+300= 3,700,000 P(x)= -.1(150)^2 +50(150) +300= 4,950,000 P(x)= -.1(250)^2 +50(250) +300= 5,950,000 P(x)= -.1(350)^2 +50(350) +300= 4,950,000 P(x)= -.1(450)^2 +50(450) +300= 1,950,000

    asked by Betty
  253. physics

    Discuss what happens when a man fires a pistol in front of a flight of stairs in a large hall.

    asked by victoria
  254. physics

    A student tries to produce notes of higher frequency by blowing a trumpet harder Discuss whether he will succeed?

    asked by daniel
  255. Psychology

    Jiskha Support Team, I am supposed to do a written assignment however I am having a problem with understanding instruction number #1 and #3 #1 through #4 is part of the requirement for my written paper #1). Must include an introductory paragraph with a

    asked by Sharon
  256. Physics

    How do you find the acceleration of an object on a velocity-time graph if the acceleration of the object is at t = 5 s in m/s2?

    asked by Paige
  257. science

    what are the molecular or formula masses of each of the following compounds,al[oh]3,hno3,pcl3,cuco3,feso4

    asked by Anonymous
  258. Calculus

    Let R be the region bounded by y=x^2, x=1, and y=0. Use the shell method to find the volume of the solid generated when R is revolved about the line y=-2.

    asked by Becca
  259. Math

    A sequence of four integers is both arithmetic and geometric. if the sum of the four numbers is 20, find the first integer in the sequence.

    asked by Erik
  260. program planning and evaluation

    Please respond to the following questions either by writing the design name or by describing the design using standard notation (X = program, O=observation, R= random assignment). For each design, please discuss all threats to internal validity. 1. a.

    asked by ihuoma okoro
  261. Biology

    There is probably a really obvious answer to this but could you help please? In his lifetime a man produces many millions of spem cells and yet he is most unlikely to have more than ten children. Suggest a biological advantage of producing such vast

    asked by Lucy
  262. Algebra

    In 1994, the life expectancy of males in a certain country was 63.8 years. In 2001, it was 66.0 years. Let E represent the life expectancy in year t and let t represent the number of years since 1994. The linear function e(t) that fits the data is? Use the

    asked by Debbie
  263. Calculus

    Find the volume of the solid formed when the region bounded by y=3x^2 and y=36-x^2 is revolved about the x-axis.

    asked by Becca
  264. Management

    Do managers work in a vaccum?

    asked by Anonymous
  265. Calculus

    Find the volume of the solid whose base is the region bounded by y=x^2 and the line y=0 and whose cross sections perpendicular to the base and parallel to the x-axis are semicircles.

    asked by Becca
  266. geometry

    the sides of an acute triangle are x, 35, and 37, where x is the shortest side. find the range of possible values for x and express it as an inequality.

    asked by tab
  267. intense algebra

    which value is the closest to 1/9.24/25 a. 0 b. 0.5 c. 1 d. 21/20

    asked by cain
  268. math

    Q: Convert 4x^2 + 4y^2 -8x -16y -29 = 0 into standard form. I first started by pairing the like terms together, getting: 4x^2 -8x + 4y^2 -16y = 29 The next step, I'm a little confused. I know I need to complete the square, but I'm not sure how to fully

    asked by Kenneth
  269. literary

    what are least three elements in the poem that you found interesting or engaging(e.g., form, language, conten, and/or other literary elements).

    asked by Anonymous
  270. physics

    Suppose a 65-kg person can run 1000m in 5min. Assume that each stride is 1.5m long, and with each stride the runner must supply an amount of energy equal to her kinetic energy. How much energy (in food calories) is required to run 1km? Is your answer

    asked by Hayli
  271. math

    126 books were donated to the school. there are seven classes and each will get an equal number of the books for its classroom library. how many books will each classroom get?

    asked by john
  272. Chemistry

    An 850 gram chunk of ice at 0 degrees Celsius is dropped into a container holding 1.7 kg of water at an initial temperature of 35 degrees Celsius. Due to the presence of the ice, the temperature of the water eventually drops to 0 degrees Celsius. Show a

    asked by Selena
  273. calculus

    Consider the function f(x) = piecewise [(x^3)(cos(1/x)) , x=/=0], [0, x=0]. Use the definition of the derivative at a point to determine if f is differentiable at x=0 I am not sure how to start this question. Am I supposed to plug in x = 0?

    asked by Daniel
  274. mechanical engineering

    A railroad car that weighs 20,000 lb is traveling eastward with a velocity whose magnitude is 5fps. A second car, on the same track, that weighs 40,000 lbs also traveling in an easterly direction with a velocity of 7.8fps. When the cars collided, they

    asked by Anonymous