Questions Asked on
September 23, 2014

  1. P.E

    It is often hard to practice self-control when eating in the company of others because we are greatly influenced by A. peer pressure B. environment C. time D. emotions Is the answer D? Thanks for any help.

    asked by Gwen
  2. Math

    Explain how to use hundredths grids to subtract 1.65 - 0.98.

    asked by Martina
  3. Fractions

    A hairstylist schedules 1/4 hour to trim a customer's hair and 1/6 hour to style the customer's hair. The hairstylist plans to work 3 1/3 hours each day for 5 days each week. How many appointments can the hairstylist schedule each week if each customer

    asked by Kymmy
  4. statistics 2

    In Hamilton County, Ohio the mean number of days needed to sell a home is 86 days (Cincinnati Multiple Listing Service, April, 2012). Data for the sale of 40 homes in a nearby county showed a sample mean of 80 days with a sample standard deviation of 20

    asked by ANAHI
  5. science Help

    White skin (W) is dominant over yellow skin (w) in chickens. Which of the following genotypes would result in a white-skinned chicken that could possibly have yellow-skinned offspring? A. WW B. Ww C. ww Is the answer B?

    asked by Gwen
  6. Science! Help

    In humans, having dimples is a dominant trait. If one parent has dimples and is homosygous for the trait, what is the probability any of his or her offspring will NOT have dimples? A. 100 percent B. 50 percent C. 25 percent D. 0 percent Is the answer D?

    asked by Gwen
  7. Chemistry, empirical formula

    Determine the empirical formula for the following compounds with these compositions (by mass): a) Cr 47.7% F 52.3% b) Na 42.1% P 18.9% O 39.0%

    asked by Brian
  8. Science--Help.

    Which of the following is NOT one of the eight most common elements in Earth’s continental crust? carbon silicon oxygen aluminum The most abundant element in Earth’s continental crust (by weight) is _____. 2. oxygen silicon calcium iron 3. The central

    asked by Anonymous
  9. Explor wheel

    the purpose of font formatting within a serach log is to identify key words, information, ___?

    asked by Explor wheel help!
  10. Chemistry, HELP!!

    a) If the volume of a flask is 165 mL and the mass of the vapor in the flask is 0.2136 grams, what is the density of vapor in the flask? b)If the temperature of the vapor is 25 degrees Celsius, what is the molecular weight of the vapor? (Assume the gas

    asked by Brian
  11. PHYS. (forces)

    A Styrofoam ball has just been shot straight up. Air resistance is not negligible. Draw a free-body diagram. i only have two attempts left and im not sure what im doing wrong. is the direction of gravity(down) and drag (up) wrong?

    asked by Dib
  12. science Help

    Which of the following describes the genotype and phenotype of parents whose child will definitely have a recessive trait? A. Both parents are homozygous for the recessive allele and have the trait. B. Both parents are homozygous for the recessive allele

    asked by Gwen
  13. statistics 1

    A study found that, in 2005, 12.5% of U.S. workers belonged to unions (The Wall Street Journal, January 21, 2006). Suppose a sample of 400 U.S. workers is collected in 2006 to determine whether union efforts to organize have increased union membership.

    asked by MIA
  14. math

    The Sandersons are planning to refinance their home. The outstanding principal on their original loan is $100,000 and was to amortized in 240 equal monthly installments at an interest rate of 11%/year compounded monthly. The new loan they expect to secure

    asked by Anonymous
  15. Fractions

    Zoey made 5 1/2 cups of trail mix for a camping tip. She wants to divide the trail mix into 3/4 cup servings. A)Ten people are going. Can Zoey make enough 3/4 cup servings so that each person on the trip has one serving? B)What size would the servings need

    asked by Kymmy
  16. Grammar

    1. Choose the answer that identifies the form of the verb in the sentence. Cindy is painting her room purple. present present participle past past participle Question 2. Choose the answer that identifies the tense of the verb in the sentence. Has the rain

    asked by Sara
  17. Math

    Pizza cost $1.50per slice. Use a table and an equation to represent the relationship between the number of slices of pizza bought and the total cost?

    asked by Faith
  18. statistics 2

    In Hamilton County, Ohio the mean number of days needed to sell a home is 86 days (Cincinnati Multiple Listing Service, April, 2012). Data for the sale of 40 homes in a nearby county showed a sample mean of 80 days with a sample standard deviation of 20

    asked by MIA
  19. Fractions (not decimals)

    Eleanor and Max used two rectangular wooden boards to make a set for the school play. One board was 6 feet long, and the other was 5 1/2 feet long. The two boards had equal widths. The total area of the set was 60 3/8 square feet. What was the width? THANK

    asked by Kymmy
  20. Child care

    6. Local, state, and provincial governments may have specific regulations that apply to the physical space in a day care center. A typical requirement in these regulations is a minimum of _______ square feet of usable play space for each child. A. 35 (B).

    asked by Desiree
  21. Statistics

    The following data set is the GPAs of the students in a statistics class. 1.93, 1.99, 2.00, 2.04, 2.12, 2.34, 2.55, 2.55, 2.75, 2.75, 2.80, 2.80, 2.85, 3.02, 3.12, 3.22, 3.31, 3.33, 3.45, 3.69 What percentile is a GPA of 2.34? A. About the 6th B. About the

    asked by Amy
  22. math

    "Just look at the graph," the player's agent said. "Phil'!@#$%^&s have doubled since last year. We are looking for a large raise and a long contract." Look at the graph. Graph: i.imgur. com/wY0gqtQ.png How can you redraw this graph so it appears that

    asked by quinn
  23. physics

    A person in a kayak starts paddling, and it accelerates from 0 to 0.577 m/s in a distance of 0.565 m. If the combined mass of the person and the kayak is 60.6 kg, what is the magnitude of the net force acting on the kayak?

    asked by iamstupid
  24. statistics 3

    An airline promotion to business travelers is based on the assumption that no more than two-thirds of business travelers use a laptop computer on overnight business trips. 1. What is the sample proportion from an American Express-sponsored survey that

    asked by MIA
  25. Physics

    Consider a wet roadway banked as in the following figure, where there is a coefficient of static friction of 0.30 and a coefficient of kinetic friction of 0.25 between the tires and the roadway. The radius of the curve is R = 50 m. (a) If the banking angle

    asked by HelpMaths
  26. Science Help

    Which of the following describes the genotype and phenotype of parents whose child will definitely have a recessive trait? A. Both parents are homozygous for the recessive allele and have the trait. B. Both parents are homozygous for the recessive allele

    asked by Gwen
  27. math

    A recipe for fruit salad serves 4 people. It calls for 2 oranges and 16 grapes. You want to serve 10 people. How many oranges and how many grapes will you need?

    asked by sam
  28. physics

    A toboggan slides down a hill and has a constant velocity. The angle of the hill is 6.70° with respect to the horizontal. What is the coefficient of kinetic friction between the surface of the hill and the toboggan?

    asked by chidera
  29. math

    A class has 6 boys and 15 girls what is the ratio of boys and girls

    asked by mia morris
  30. Chemistry

    A professor orders 250 mL of house coffee at precisely 95°C. She then adds enough milk at 10°C to drop the temperature of the coffee to exactly 90° C. Calculate the amount of milk (in mL) the professor must add to reach this temperature. Assume that the

    asked by Danielle
  31. math

    A telephone long-distance carrier charges customers $0.99 for the first 20 minutes and then $0.06 for each minute(or any part thereof) beyond 20 minutes. If Mary uses this carrier,how long can she talk for $4.00? I started off with 0.99x+20+0.06x=4.00.

    asked by anna
  32. physics

    What's the momentum of a 3.5-kg boulder rolling downhill at 5 m/s?

    asked by Anonymous
  33. Child care

    You're attempting to determine the amount of usable floor space in your day care facility. Which one of the following areas can you include in your calculation? A. Toy shelves in Classroom A B. Bathroom adjacent to Classroom A (C). Hallway in the classroom

    asked by Desiree
  34. Calculus

    Scorpion Gulch and Western Railway are preparing to build a new line through Rolling Mountains. They have hired you to do some calculations for tunnels and bridges needed on the line. You set up a Cartesian coordinate system with its origin at the entrance

    asked by Nick
  35. Physics

    Two friends, Barbara and Neil, are out rollerblading. With respect to the ground, Barbara is skating due south at a speed of 5.2 m/s. Neil is in front of her. With respect to the ground, Neil is skating due west at a speed of 3.2 m/s. Find Neil's velocity

    asked by Hoku
  36. History

    Many preachers included the concept of __________ in their messages meant to spread Christianity during the Second Great Awakening of the 1800s. manicheism, monism, perfectionism , creationism

    asked by katt¢¾bobby
  37. math

    The wave heights h in the open sea depend on the speed v of the wind and the length of time t that the wind has been blowing at that speed. Values of the function h = f(v, t) are recorded in feet in the following table. the values that you need on the

    asked by sara
  38. Science

    using an example explain how being able to understand scientific principles and think scientifically can help you solve problems and answer questions in your everyday life? Do you have any suggestions

    asked by Science! Help
  39. Science

    Which of the following units are in order from smallest to largest? a) Epoch, period, era. b) Era, epoch, period. c) Period, era, epoch. d) Epoch, era, period. True or False? Folding, as well as motion along faults, can change the position of rock layers

    asked by Sarah
  40. Physics

    What is the threshold frequency for the photoelectric effect on lithium (phi= 2.93eV)? What is the stopping potential if the wavelength of the incident light is 400nm?

    asked by Tom
  41. Algebra

    Logan saves $5.50 in dimes and quarters over a week. He has 20 more dimes than quarters. Find the number of dimes and quarters he saves.

    asked by Kyle
  42. math

    How much ribbon is needed to wrap the package shown if 15 inches of ribbon are needed to make the bow? length is 16 width is 9 height is 4

    asked by anthony
  43. Science

    What microscope would you use to observe dust mite's skin?

    asked by Christi
  44. Science

    Felipe made a toy boat out of clay, but it kept sinking in water. He changed the boat's design by making it slightly wider than before. Why did Felipe's newly designed boat float on water? A. He decreased the density by increasing the volume. B. He

    asked by Connie
  45. science Help

    In humans, having more than five fingers or toes is dominant over having exactly five finger or toes. Which of the following situations would most likely result in exactly half of a couple's offspring having six digits and half of them having five? A.Both

    asked by Gwen
  46. lac 2

    4. Critics often say that Chekhov’s short stories show “slices of life” rather than complete story arcs. How do the endings of "Star Food," "Everything That Rises Must Converge," and "The Bet" reflect what might be considered incomplete story arcs?

    asked by Anonymous
  47. statistics 1

    A study found that, in 2005, 12.5% of U.S. workers belonged to unions (The Wall Street Journal, January 21, 2006). Suppose a sample of 400 U.S. workers is collected in 2006 to determine whether union efforts to organize have increased union membership.

    asked by ANAHI
  48. Chemistry 15

    a vessel connected to an open-end mercury manometer is filled with gas to a pressure of .835 atm.the atmospheric pressure is 755 torr.In which arm of the manometer will the level of mercury be higher?What is the height difference between the two arms of

    asked by Alvyn
  49. science Help

    A long-haired cat (recessive trait s) is crossed with a heterocygous short-haired cat (dominant trait S). What percentage of their offspring will have long hair? A. 100 percent B. 50 percent C. 25 percent D. 0 percent Is the answer C?

    asked by Gwen
  50. Algebra

    The selling prices of houses in a city during one year were normally ditributed with a mean of $259,000 and a standard deviation of $15,000. Which of the following is closest to the percentage of the homes that had a selling Price between $244,000 and

    asked by Jessica
  51. statistics 3

    An airline promotion to business travelers is based on the assumption that no more than two-thirds of business travelers use a laptop computer on overnight business trips. 1. What is the sample proportion from an American Express-sponsored survey that

    asked by ANAHI
  52. statistics 7

    Home values tend to increase over time under normal conditions, but the recession of 2008 and 2009 has reportedly caused the sales price of existing homes to fall nationwide (BusinessWeek, March 9, 2009). You would like to see if the data support this

    asked by MIA
  53. physics

    A basketball player throws the ball at a 60° angle above the horizontal to a hoop whose centre is located a horizontal distance L = 8.60 m from the point of release and at a height h = 0.80 m above it. What initial speed is required if the basketball is

    asked by Anonymous
  54. Please help me with this Q

    Find the standard deviation for the given data. Round your answer to one more decimal place than the original data. 22, 29, 21, 24, 27, 28, 25, 36 A. 4.8 B. 4.2 C. 2.8 D. 1.6

    asked by Amy
  55. science Help

    A long-haired cat (recessive trait s) is crossed with a heterocygous short-haired cat (dominant trait S). What percentage of their offspring will have long hair? A. 100 percent B. 50 percent C. 25 percent D. 0 percent Is the answer C?

    asked by Gwen
  56. sociology

    Which statement best reflects the argument that prayer in school should be protected? (Points : 1) Prayer is protected by the second amendment. Prayer contributes to virtuous ideals in the student body. Prayer is different across cultures and as such

    asked by stacy
  57. Math Algebra

    At a shoe store, a salesman earns a weekly salary of $150. A salesperson is it also paid 2$ each pair of shoes he or she sells during the week.

    asked by Auxiliary Improvement
  58. reference frames

    Car A is heading north with a velocity of 14 m/s. Car B is traveling south with a velocity of 19 m/s. What is the relative motion between the two cars? A. 5 m/s B. 14 m/s C. 19 m/s D. 33 m/s would this be A, since 19-14 = 5?

    asked by franz
  59. Science Help

    A long-haired cat (recessive trait s) is crossed with a heterocygous short-haired cat (dominant trait S). What percentage of their offspring will have long hair? A. 100 percent B. 50 percent C. 25 percent D. 0 percent Is the answer C?

    asked by Gwen
  60. Calculus

    A spacecraft is in an elliptical orbit around the earth. At the time t=0 hours, it is at its apogee (highest point), d=1000 km above the earth's surface. It is at its perigee (lowest point) d=100 km above the surface 50 minutes later. a. Assuming that d

    asked by Nick
  61. Physics

    What is the threshold frequency for the photoelectric effect on lithium (phi= 2.93eV)? What is the stopping potential if the wavelength of the incident light is 400nm?

    asked by Paul
  62. Mathematics and investment

    1. Angelo wants to renovate his house in 3 years. He estimates the cost 300,000. How much must Angelo invest now at 8% compounded quarterly in order to have 300,000 3 years from now. 2. Angelo Ancis want to save 500,000 in 5.5 years to renovate their rest

    asked by mezell
  63. Physics

    What is the threshold frequency for the photoelectric effect on lithium (phi= 2.93eV)? What is the stopping potential if the wavelength of the incident light is 400nm?

    asked by Paul
  64. Science

    An object has a volume of 22 liters and a mass of 35 kilograms what's the objects density?¿???????????????

    asked by Rose
  65. Science

    A piece of aluminum has a mass of 39.15g and a volume of 14.5cm cube. Determine the density of the aluminum. What would the density be of a much larger piece of aluminum? explain. I established the density of the al. is 2.7g/ cm cube. I don't get the

    asked by Sally
  66. Math

    Find the standard deviation for the given data. Round your answer to one more decimal place than the original data. 15, 42, 53, 7, 9, 12, 14, 28, 47 A. 29.1 B. 16.6 C. 17.8 D. 15.8 is it C

    asked by Amy
  67. physics

    An airport has runways only 196 m long. A small plane must reach a ground speed of 38 m/s before it can become airborne. What average acceleration must the plane’s engines provide if it is to take off safely from its airport? Answer in units of m/s 2

    asked by James
  68. physics

    A piston of a car engine executes a simple harmonic motion. the acceleration a of the piston is related to its displacement x by the equation: a = -6.4*10^5x a) Calculate the frequency of motion b) The piston has a mass of 700 gms & a max displacement of 8

    asked by Saeed
  69. Explore wheel

    A online data base is a way for students to keep track of information during research. Am I correct

    asked by Explor wheel help!
  70. History

    What is a reason Sumer declines as a civilization? A- Sumerian rulers fought to gain territory B- the Tigris and Euphrates rivers dried up C- the climate changes drastically D- Sumerian rulers outlawed religion My guess is A

    asked by Skkye
  71. physics

    Two objects (53.0 and 16.0 kg) are connected by a massless string that passes over a massless, frictionless pulley. The pulley hangs from the ceiling. Find (a) the acceleration of the objects and (b) the tension in the string.

    asked by chidera
  72. SCIENCE

    If we decrease the distance an object moves we will decrease the amount of force applied. Decrease the amount of work done. increase the amount of force applied. increase the amount of work done.

    asked by HELP PLEASE
  73. accounting

    Pike Corporation paid $100,000 for a 10% interest in Salmon Corp. on January 1, 2010, when Salmon's stockholders' equity consisted of $800,000 of $10 par value common stock and $200,000 retained earnings. On December 31, 2011, after receipt of the year's

    asked by shosh
  74. History

    Which best defines History? A- discovery and classification of human artifacts B- people, places, and events of previous centuries C- study of ancient peoples and the way they changed D- study of human past and the story of change over time Please help!!

    asked by Skkye
  75. Physics

    A projectile of mass 0.377 kg is shot from a cannon, at height 6.6 m, as shown in the figure, with an initial velocity vi having a horizontal component of 6.1 m/s. The projectile rises to a maximum height of y above the end of the cannon’s barrel and

    asked by Bob
  76. Physics

    As you hurry to catch your flight at the local airport, you encounter a moving walkway that is 85 m long and has a speed of 2.2 m/s relative to the ground. If it takes you 68 s to cover 85 m when walking on the ground, how long will it take you to cover

    asked by Anon
  77. Math

    Jasmine has 8 pack of candle wax to make scented candles. Each pack contain 14ounces of wax. Jasmine uses 7 ounces of wax to make one candle . How many candles can she make

    asked by Anonymous
  78. Science! Help

    In humans, having more than five fingers or toes is dominant over having exactly five finger or toes. Which of the following situations would most likely result in exactly half of a couple's offspring having six digits and half of them having five? A.Both

    asked by Gwen
  79. statistics 7

    Home values tend to increase over time under normal conditions, but the recession of 2008 and 2009 has reportedly caused the sales price of existing homes to fall nationwide (BusinessWeek, March 9, 2009). You would like to see if the data support this

    asked by ANAHI
  80. Math

    A farmer raises chickens and goats. She knows she has 22 animals all together. All together her animal has 56 feet. how many of each type of animal does she have?

    asked by Gregory
  81. statistics

    The mean grade in this class last semester was 78.3, and the variance was 34.6 . The distribution of grades was unimodal and symmetrical.. determine how many students are likely to fail the class (90), if 60 students are enrolled. Show all your work, and

    asked by Nicole.H
  82. language arts

    . In "The Drummer Boy of Shiloh," the author sets this story before instead of during a battle

    asked by skyler swedeen
  83. Industrial Psychological Research

    what is the proportion of students with a raw score less than 10? if information was collected from fellow students the rating on a 5 point scale on 5 different questions. given a normally distributed population with a mean of 13, a standard deviation of

    asked by Precious
  84. Chemistry

    A hydrogen atom has a mass of 1.673x10^-24 g How many hydrogen atoms would you have in 5.6 g of hydrogen?

    asked by Anonymous
  85. Physics

    White dwarf stars have been observed with a surface temperature as hot as 200,000 o C. What is the wavelength of the maximum intensity produced by this star?

    asked by Paul
  86. Physics

    An experimenter finds that no photoelectrons are emitted from tungsten unless the wavelength of light is less than 270nm. Her experiment will require photoelectrons of maximum kinetic energy 2.0eV. what frequency of light should be used to illuminate the

    asked by Paul
  87. Science

    Why might scientists first want to build and study a model of their proposed project?

    asked by Dfca
  88. Math

    In a test a student scored 51 marks out of 80. Express his mark as a percentage to the nearest whole percent

    asked by Nuwel
  89. statistics

    In order to study whether IQ level is related to birth order, data were collected from a sample of 540 students on their birth order (Oldest/In Between/Youngest) and their score on an IQ test. The data collected in this study would be best displayed using:

    asked by sifuentes
  90. Math

    Solve the given quadratic equation exactly using the quadratic formula. Write the solutions in its simplest form. Using a calculator, determine all irrational solutions to the nearest thousandth. Separate the solutions with a comma and list the smaller one

    asked by Jade
  91. math

    A pair of intersecting planes ______ intersect in exactly one point? A- always B- sometimes C- never D- not enough information I think A- always, but I do not know for sure.

    asked by Skye
  92. Algebra 1

    1) Alexis Received an 85, 89, and 92 On Three Tests. How Many Does She Need To Score On Her Next Test In Order To Have An Average Of At Least 90? 2) 1/5(30 + a)< 5 HEEEELPPP 😂😂

    asked by Mimii
  93. Physics

    An FM radio station of frequency 107.7MHz puts out a signal of 50,000W. How many photons/s are emitted?

    asked by Paul
  94. algebra 2

    The average score on a standardized test is 750 points with a standard deviation of 50 points. What is the probability that a student scores more than 700 on the standardized test?

    asked by Anonymous
  95. Math

    sumiko is allowed to watch no more than 10 hours of televisione ach week she has watched 4 hours of television already. write and solve an inequality to show many more hours of television sumiko can watch 10≤4+h

    asked by Coleson
  96. Algebra 2 (Please, help me!)

    1. Explain how to find the slope of a line from a table of data. A: ? 2. Explain how to justify the Cross Products Property by using Mulitplication Property of Equality. A: ?

    asked by Victoria
  97. math

    The amount of paint an electric paint sprayer applies varies directly with time. A sprayer is set to apply 0.5 gallon in 2.5 minutes. Write an equation that gives the amount P of paint as a function of the time T. How much paint is applied if the sprayer

    asked by Dina
  98. Math Help

    Choose the word phrase that can be represented by 2 – p. the difference of a number p and 2 the quotient of 2 and a number p 2 more than a number p 2 decreased by a number p 2. Which word phrase could represent the variable expression 1/2a + 4? 4 more

    asked by Anonymous
  99. chemistry

    A 50g chunk of metal (c=0.0506 j/g°C) is heated to 60°C. it is then dropped into a calorimeter(c=1.40 j/g°C,m=5.0 g)that contains 100.0g of an unknown liquid. the temperature of the liquid raises from 15°C to 20°C.What is the c of the calorimeter?

    asked by liz
  100. Math

    Fern rounded to the nearest ten to estimate 548-132. She subtracted 540-130=410. Is Fern's estimate correct? Explain.

    asked by Alyssa
  101. sociology

    According to literature on violence in television, the average 18 year old will have seen how many violent acts? (Points : 1) 1,000 6,000 8,000 60,000 200,000

    asked by stacy
  102. Physics

    An FM radio station of frequency 107.7MHz puts out a signal of 50,000W. How many photons/s are emitted?

    asked by Tom
  103. history

    How did Calhoun and South Carolina propose to test the theory of nullification? What factors contributed to their decision?

    asked by Aliene
  104. Math

    Logan saves $5.50 in dimes and quarters over a week. He has 20 more dimes than quarters. Find the number of dimes and quarters he saves. How do I solve the problem algebraically?

    asked by Samantha
  105. statistic research

    ryan selects one card from a deck of 52 different card. the first card is not replaced before joe selects the second one. in how many different ways can they select the two card?

    asked by may pinaroc
  106. physics

    If the earth doubled in mass but stayed the same size, what would be the acceleration due to gravity at the surface? m/s2 The dimensions of the earth as we currently know it are: Mass = 5.98E24 kg, Radius = 6.38E6 m and the universal gravitational constant

    asked by Girma
  107. physics

    worker stands still on a roof sloped at an angle of 30° above the horizontal. He is prevented from slipping by a static frictional force of 560 N. Find the mass of the worker.

    asked by chidera
  108. algebra

    to pass a course with an A grade, a student ,must have an average of 90 or higher. A students grades on three tests are 93,92 and 83. What is the score the student must get on the nest test to get an A average?

    asked by Emily
  109. Math

    Solve the given quadratic equation exactly using the quadratic formula. Write the solutions in its simplest form. Using a calculator, determine all irrational solutions to the nearest thousandth. Separate the solutions with a comma and list the smaller one

    asked by Sam
  110. History

    Which was one result of the domestication of animals? A- longer life spans for people B- increased trade among villages C- new kinds of food and clothing became possible D- new division of between men and woman I think it is D.

    asked by Skkye
  111. Social Studies

    I need a website that has answers to this worksheet: Russia and Eastern Europe: CHERNOBYL - April 26, 1986.

    asked by Lily
  112. Chemistry

    Since a hydrogen atom consists of just one proton and one electron, it should have a mass of 1.673 x 10^-24 g. And so it does. Calculate how many hydrogen atoms you'd have if you had 5.6 g of hydrogen.

    asked by Alex
  113. chemistry

    10. A student weight out a 25 g sample of NaCl, SiO2 and NH4Cl. The student determines the sample contains 3.0 g NH4Cl and 7.0 g SiO2. What is the percentage of NaCl by mass (weight) in the sample?

    asked by Anonymous
  114. Geometry

    Did I solve the following correctly? I had to the fin the midpoint. A (-3, 2) B (5, -4) I did the midpoint formula: M(-3+5/2, 2+ -4/2=M (2/2, -2/2). Is (2/2, -2/2) the correct midpoint?

    asked by Eva
  115. MATH-Help!

    A new set of car tires has a tread depth of 8 millileters. The tread depth decreases 0.12 millimeter per thousand miles driven. Write an equation that gives the tread depth as a function of the distance driven. Then predict what distance the tread depth

    asked by Sara
  116. Physics

    The Stanford Linear Accelerator can accelerate electrons to 50GeV (50x10^9eV). What is the minimum wavelength of photon it can produce by bremsstrahlung? Is this photon still called an x-ray?

    asked by Paul
  117. Physics

    Q1-a stone is thrown upwards into the what is the magnitude and direction of its acceleration ? Q2-if a ball is thrown horizontally from a top of a cliff and takes 3 seconds to reach the beach below. Calculate the height if the cliff by considering the

    asked by Nsreen
  118. math

    Jim is painting a new shed . If 1/5 of a gallon of paint covers 2/25 of the shed , how many gallons of paint would be needed to paint 4 sheds of that size?

    asked by Shamus
  119. chem

    a 50ml aliquot sample of vinegar is titrated with a 0.078 M NaOH sol'n. The phenolpthalein end point was reached after the addition of 35.6 ml. Equation: HC2H3O2 + NaOH _____> NaC2H3O2 + H20 Calculate the % by mass/vol. of acetic acid in the sample.

    asked by jane
  120. Math

    Two wires are connected to a tower at the same point on the tower. Wire 1 makes an angle of 45° with the ground and wire 2 makes an angle of 60° with the ground. b) Which wire is longer? Explain. (2 marks) c) If the point where the two wires connect to

    asked by Alex
  121. chemistry

    Mercury poisoning is a debilitating disease that is often fatal. In the human body, mercury reacts with essential enzymes, leading to irreversible inactivity of these enzymes. If the amount of mercury in a polluted lake is 215 ng of mercury / mL, what is

    asked by Brooke
  122. organic chemistry

    an alkane formula c8h18 can form only three monochlorination products give its structure

    asked by sarah
  123. physics

    A car is towing a boat on a trailer. The driver starts from rest and accelerates to a velocity of +11.4 m/s in a time of 29.2 s. The combined mass of the boat and trailer is 443 kg. The frictional force acting on the trailer can be ignored. What is the

    asked by chidera
  124. Algebra 2

    Explain how to justify the Cross Products Property by using the Multiplication Property of Equality.

    asked by Victoria
  125. Fractions

    Eleanor and Max used two rectangular wooden boards to make a set for the school play. One board was 6 feet long, and the other was 5 1/2 feet long. The two boards had equal widths. The total area of the set was 60 3/8 square feet. What was the width?

    asked by Kymmy
  126. algebra

    what is the system of equation of: 0.25x+0.15y=2.5 1.25x-1.25y=7.5

    asked by jhia
  127. Algebra

    You are planing to put a title border along a 175-inch-wide wall in your kitchen. You want to use only whole titles. List all the possible whole number title widths of 8 inches or less, what size title could you use? 8 inch or 4 inch

    asked by Diego
  128. CHECK PLEASE

    11.abhor : detest 12.infraction 13.resolute 14.infringe 15.abound 11.Find the pair of words that has the same kind of relationship as the numbered pair. abscond : flee :: A. ascertain : forget B. concise : cut C. discern : hide D. abhor : detest 12.In

    asked by Matt
  129. algebra

    Becky a saleswoman,is offered two salary plans. Plan 1 is $450 per week salary plus a 3% commission of sales. Plan 2 in a $300 per week salary plus a 16% commission of sales.How much would Becky need to make in sales for the salary to be the same from both

    asked by annonomyous
  130. math

    The school cafeteria serves pizza every 6th day and applesauce every day Thursday supposed to pizza and applesauce are both on today's menu in how many days will they be together on the menu again?

    asked by Alex
  131. Vector

    Let P=(1,2,-1),Q=(3,-1,4),and R=(2,6,2) be three vertices of a parallelogram PQRS. (a) Find the coordinates of S. (b) Find the area of PQRS.

    asked by HelpMaths
  132. sociology

    Justice Potter Stewart would most agree with which claim about obscenity? (Points : 1) It is easy to concretely determine what obscenity is. People can intuitively understand what obscenity is. Obscenity ought to be allowed so long as no one is harmed.

    asked by stacy
  133. Physics

    White dwarf stars have been observed with a surface temperature as hot as 200,000 o C. What is the wavelength of the maximum intensity produced by this star? help please don't know what to do

    asked by Tom
  134. sociology

    One who believes in a social contract theory would most agree with which statement? (Points : 1) people do not need laws to live harmoniously in society. humans make contracts in order to buy things. in order to establish society, humans agree to obey

    asked by stacy
  135. Physics

    How long does it take an automobile traveling 68.5 km/h to become even with a car that is traveling in another lane at 56.5 km/h if the cars’ front bumpers are initially 145 m apart? Answer in units of s.

    asked by Alisa
  136. Meth

    18. Jared wants to rent a car. They charge $39.95 per day plus miles. The first 100 miles are free, but the company charges $0.20 per mile after that. If Jared has $50, what is the range of number of miles he can drive if he rents the car for one day?

    asked by Anonymous
  137. Math

    The expression cos 60° is equivalent to sin ?

    asked by Alex
  138. Physics

    An FM radio station of frequency 107.7MHz puts out a signal of 50,000 W.How many photons/s are emitted?

    asked by Paul
  139. Physics

    An experimenter finds that no photo-electrons are emitted from tungsten unless the wavelength of light is less than 270nm.

    asked by Paul
  140. Trigonometry

    Factor the expression and use the fundamental identities to simplify. 1-2 cos^2x + cos^4x

    asked by Syndra
  141. Math

    Find a unit vector in the direction of(1/2, 1/2, 1/2).

    asked by Kyle
  142. HELP

    Shane's seats at the concert were so far from the stage that he could not ____________ who was the lead singer and who was the guitarist

    asked by Matt
  143. Social studies

    I need help for my 6th grader how do we describe some of the similarites and difference between the southern and northern regions with each other

    asked by Pinks
  144. physics

    The longest pass in NFL history is approximately 83.7 m. Ignoring the effects of air resistance, calculate what must have been the initial speed of the football.

    asked by brandon
  145. social studies

    which two cities of nepal are connected by siddhartha highway?

    asked by ashish
  146. Economic

    The Admissions Director (AD) wants to determine the optimum number of students for each ECO561 class. You are provided with the following data: Tuition is $1250 per student. Instructor Pay $2500 Other incidental (variable) costs - $1000.00 Variable cost

    asked by Rose
  147. english

    what are some archetypal monster in movies. (we just got done reading beowulf) thank you!!

    asked by lauren
  148. Physics

    A golfball comes to rest 1.9 seconds after hitting a net. The force of the net slowed down at a rate of 56.3 m/s2. What was the velocity of the ball when it first hit the net??

    asked by Mickayla
  149. US Government

    Why might the Framers have wanted the presidents power in foreign affairs to be so broad?

    asked by Anabella
  150. physics

    From a 5 metre high smooth hill a 6 kg block slides down and stops somewhere on the horizontal ground. Effect of turning part is negligible. Find the work done while the block is pulled back from this position to the top of the hill.

    asked by anubha
  151. math

    Becky a saleswoman,is offered two salary plans. Plan 1 is $450 per week salary plus a 3% commission of sales. Plan 2 in a $300 per week salary plus a 16% commission of sales.How much would Becky need to make in sales for the salary to be the same from both

    asked by anna
  152. Math

    If a dozen items are divided into two equal groups how many will be in each group explain how you know

    asked by Nbrum
  153. Maths

    Matt has a bag containing 12 green marbles and 8 blue marbles. Without looking, he pulls out one marbles and places it on the table. He then picks a second marbles from the bag. What is the probability he will have 2 blue marbles?

    asked by Lisa
  154. algebra

    the numbers on two consecutively numbered gym lockers have the sum of 131. what are the locker numbers?

    asked by david
  155. government

    The purpose of the First Ten Amendments to the Constitution is to __________.

    asked by Anonymous
  156. Algebra 2 Help plz

    The amount of paint an electric paint sprayer applies varies directly with time. A sprayer is set to apply 0.5 gallon in 2.5 minutes. Write an equation that gives the amount P of paint as a function of the time T. How much paint is applied if the sprayer

    asked by Josh M
  157. Physics

    An experimenter finds that no photo-electrons are emitted from tungsten unless the wavelength of light is less than 270nm. Her experiment will require photo-electrons of maximum kinetic energy 2.0eV. what frequency of light should be used to illuminate the

    asked by Paul
  158. Physics

    A hockey puck slides with an initial speed of 48 m/s on a large frozen lake. If the coefficient of kinetic friction between the puck and the ice is 0.030, what is the speed of the puck after 11 s?

    asked by Chrissy
  159. health

    Question 8 of 20 5.0 Points Functions of blood include: A. Transporting hormones from glands B. Transporting carbon dioxide away from the lungs to body tissue C. Transporting waste away from the kidneys D. All of the above A

    asked by lavell
  160. math

    A box of 20 Crunchy Munchy cookies costs $2.50 and a box of 40 Crunchy Munchy cookies costs $4.00. One quart of milk costs $1.50. Which of the following options costs less?

    asked by Anonymous
  161. History

    I'm back. I didn't understand the answer yesterday, and I re-read my book, but I'm still confused. Can you help? 1. Why did the system of feudalism arise during the Middle Ages? A. to develop an economic system B. to determine jobs within a city C. to

    asked by dddd47906
  162. Vector

    Let 𝑎⃗ and 𝑏 be two vectors in the xy plane making angles 𝜃 and ∅ with the x axis, respectively. Use vector algebra to show that: cos(𝜃 − ∅) = cos 𝜃 cos ∅ + sin 𝜃 sin ∅

    asked by HelpMaths
  163. chemistry

    A sample of 1.15g of lead (II) nitrate is mixed with 121mL of 0.104 M sodium sulfate solution. Part A Write the chemical equation for the reaction that occurs.

    asked by Cas
  164. Math

    Write an inequality for each statement The product of a number and -4 is at most 24

    asked by Coleson
  165. Physics

    Calculate the gravitational potential energy of the water in a lake of volume 100km^3 (mass=1.0x10^14kg). The lake has an average height of 50m above the hydroelectric generators at the base of the dam holding the water back.

    asked by CeCe
  166. Physic

    The distance between two nearest nodes of a standing wave is 17.3 cm. Hand generated pulses move up and down through a complete cycle four times every seven seconds. Find the velocity of the wave. Answer in units of m/s.

    asked by Anonymous
  167. Physics

    A crate of mass 54 kg is attached to one end of a string, and the other end of the string runs over a pulley and is held by a person as in the figure below. If the person pulls with a force of 93 N, what is the crate's acceleration? (Assume that upward is

    asked by Chrissy
  168. Science

    If the coordinates of points A and L are -4 and 8, respectively, then the midpoint between them has a coordinate of____ A- 0 B- 2 C- 4 D- 6 Please help me understand this!

    asked by Skkye
  169. Physics

    An experimenter finds that no photo-electrons are emitted from tungsten unless the wavelength of light is less than 270nm. Her experiment will require photo-electrons of maximum kinetic energy 2.0eV. what frequency of light should be used to illuminate the

    asked by Tom
  170. Physics

    A body's temperature is increased from 900K to 1900K. By what factor does the total power radiated per unit area increase?

    asked by Paul
  171. Physics

    The Stanford Linear Accelerator can accelerate electrons to 50GeV (50x10^9eV). What is the minimum wavelength of photon it can produce by bremsstrahlung? Is this photon still called an x-ray?

    asked by Derick
  172. Physics

    White dwarf stars have been observed with a surface temperature as hot as 200,000 o C. What is the wavelength of the maximum intensity produced by this star?

    asked by Paul
  173. Physics

    A gamma ray with 700KeV energy is Compton-Scattered from an electron. Find the energy of the photon scattered at 110 degrees, the energy of the scattered electron, and the recoil angle of the electron.

    asked by Sarah
  174. Physics

    The Stanford Linear Accelerator can accelerate electrons to 50GeV (50x10^9eV). What is the minimum wavelength of photon it can produce by bremsstrahlung? Is this photon still called an x-ray?

    asked by Paul
  175. Physics

    A gamma ray with 700KeV energy is Compton-Scattered from an electron. Find the energy of the photon scattered at 110 degrees, the energy of the scattered electron, and the recoil angle of the electron.

    asked by Paul
  176. chem

    A .7567 impure KHP was dissolved in water. 26.7 ml of standardized 0.068 M NaOH was used to achieve a phenolphthalein end point. The stoichiometric ratio between KHP and NaOH is 1:1. What is the percent by mass of KHP in the sample?

    asked by jane
  177. Science

    The gradient or slope of the distance time graphy at any pont gives

    asked by Ammu
  178. Math

    you complete 3 cm of a necklace in1 hour. Each hour after the first hour you triple the length of the necklace. What is the length of the necklace after 3 hours?

    asked by Lee
  179. physics

    If a ball hits a wall going 10 m/s, and bounces off going 7 m/s. What is the coefficient of restitution?

    asked by Girma
  180. math

    In my homework it says to put 1,3,4,and 8 to equall 18 only using the symbols +.-,x, and ( ). What is the answer to that?

    asked by Jenny
  181. Algebra

    Maggie is making fruit punch. She uses 2 1/2quarts of grape juice and 1 1/2 quarts of orange juice. 1 quart of grape =$1 less and 1 quart of orange juice. The total cost to make the fruit punch is $12.50 how much is each quart of each juice?

    asked by Jeff
  182. math

    What are the coordinates of the reflection of (a, b) over the y-axis?

    asked by Skye
  183. maths

    in a group of 60 children 31 speak French 23 speak Spanish 14 neither French nor Spanish find the number of student who speak: (a)both French and Spanish (b)French only (c)Spanish only draw a venn diagram please answer quickly

    asked by amrita
  184. Math

    Find two numbers the exact answer is between 6x7381

    asked by Anonymous
  185. Calculus

    A sinusoidal section is to be built as part of a roller coaster track. The high point is h=27 m at a horizontal distance d=0 m. It has a low point at h=-3 m at d=50 m. a. Write an equation expressing h in terms of d. b. The lengths of the horizontal

    asked by Nick
  186. algebra

    what is the system of equation of: 1/2x+ 1/2y=4 3x-2y=5/4

    asked by jhia
  187. algebra

    What is the system of equation of: 1/2x+-2/3y=4 2x+1/3y=7

    asked by jhia
  188. criminal justice

    In what ways do corrections professionals use the social justice principles of equality, solidarity, and human rights to build a more just society.

    asked by kirsten
  189. Criminal Justice

    How do corrections professionals use criminal theory in their practice.

    asked by kirsten
  190. Criminal Justice

    What are three main issues that face corrections professionals on a regular basis and address the best responses to these issues.

    asked by kirsten
  191. algebra

    I really need that to my examples in my report tomorrow those i posted question, its a kind of test tomorrow please help me now please... even if now only...

    asked by jhia
  192. math

    Rationalize the denominator using the conjugate. 1/1-√7+√5 please show all the steps and explain it i don't get it

    asked by sunny
  193. physics

    a 700 newton man is able to climb up 4.5 meters on a 6 meters ladder before it slips. What must be the coefficient of friction be if the ladder is arranged so that it makes an angle 50 degrees with the ground? Assume the ladder to be uniform and weighing

    asked by james
  194. math

    2a÷4=3 .....is this answer correct: 2a=3×4 2a=12 2a÷2=12÷2 a=6

    asked by taylor
  195. algebra

    the cinema sold 600 tickets total. adults tickets were $15 and childrens tickets were $8. they made a total of $7740. how much of each ticket were sold?

    asked by lucy
  196. dana

    Wich lets you put Equal groups toghether?

    asked by Anonymous
  197. Physics

    A body's temperature is increased from 900K to 1900K. By what factor does the total power radiated per unit area increase?

    asked by Paul
  198. math

    any number that can be expressed as the ratio of 2 integers a/b, where b does not equal 0, is a rational number

    asked by Anna
  199. Math

    If 1/3 is equal to 2/6 how come my teacher says it is equal to 5/8?

    asked by Sophie
  200. Precalculus

    Find two values for theta such that theta is greater than or equal to 0 but less than or equal to 2pi. 1. Tan theta=1.1071 2. Sin theta = -0.8818

    asked by Anonymous
  201. Physics

    A television tube operates at 20,000V. What is min wavelength for the continuous x-ray spectrum produced when the electrons hit the phosphor?

    asked by Paul
  202. Physics

    If a 6.0keV photon scatters from a fee proton at rest, what is the change in the photon's wavelength if the photon recoils at 90 degrees?

    asked by Paul
  203. Physics

    A gamma ray with 700KeV energy is Compton-Scattered from an electron. Find the energy of the photon scattered at 110 degrees, the energy of the scattered electron, and the recoil angle of the electron.

    asked by Paul
  204. Algebra 2 Answer Check

    If the rise and run are reversed for the linear equation y = 8x + 4, what is the slope of the new line? A: 0.125 or -1/8?

    asked by Victoria
  205. health

    Veins carry blood ________ the heart A. Away from B. Towards C. Neither A or B D. Both A and B c

    asked by aaron
  206. Math

    A satellite will be released into an orbit of more than 400 miles above the earth. the rocket is carrying it is currently 255 miles above earth write and solve an inequality to show how much higher the rocket must climb before it releases the satellite

    asked by Coleson
  207. health

    The spinal cord serves as a conduction pathway for impulses going to and from the ________. A. Lungs B. Liver C. Brain D. Heart

    asked by paul
  208. Math

    Waynes homework is to solve at least 20 questions from his textbook so far he has completed 9. Write an inequality to show how many more he needs to complete 9+q ≥ 20 q ≥ 11

    asked by Coleson
  209. Math

    Felix wants to get at least one hour of exercise each day Today he has run for 40 minutes. Write an inequality to show how much longer he needs to exercise to reach his goal 40+e≥ 60 e≥ 20

    asked by Coleson
  210. History

    The invention of bronze in ancient Sumer was so significant because it_____ A- provided wealth for Sumer's growing upper class B- improved agriculture and gave rulers more power C- allowed the Sumerians to defeat the Akkadians D- provided scribes a

    asked by Skkye
  211. math

    The partial derivative with respect to y for z=e^y sin(xy) is: zy= xe^y cos(xy) + e^y sin(xy) How do i get to this answer? Thanks.

    asked by Jean
  212. math

    If the coordinates of points A and L are -4 and 8, respectively, then the midpoint between them has a coordinate of____ A- 0 B- 2 C- 4 D- 6 Please help me understand this!

    asked by Skye
  213. Algebra

    A new set of car tires has a tread depth of 8 millileters. The tread depth decreases 0.12 millimeter per thousand miles driven. Write an equation that gives the tread depth as a function of the distance driven. Then predict what distance the tread depth

    asked by Riley
  214. math

    solve x+2=2x+1

    asked by Anonymous
  215. calculus

    Suppose that the number of bacteria in a plate of food is given by N(T)= 10T^2 - 40T + 200, -1

    asked by Anonymous
  216. calculus

    Suppose that the number of bacteria in a plate of food is given by N(T)= 10T^2 - 40T + 200, -1

    asked by Anonymous
  217. math

    3×/4+11=22-5 3×/4+11-11=22-5-11 3×/4=6 (4) 3×/4=6 (4) 3×=24 /3=24/3 ×=8 correct... 3(8)/4+11=22-5 24/4+11=17 6+11=17 17=17 Nevermind :)

    asked by taylor
  218. Vector

    Your engineering firm plans to design an elevator for a hospital. The force exerted on a passenger by the floor of the elevator is not to exceed 1.60 times the passenger¡¦s weight. The elevator accelerates upward with constant acceleration for a distance

    asked by HelpMaths
  219. math

    Changing decimal to percent .123=12.3%=12 3/10 ??

    asked by taylor
  220. ecu

    test has a 500 mean with a sd of 150; with a score of .13% both negative and postive 2.14%

    asked by Anonymous
  221. Math

    Simplify and write the answer using positive exponents : 1. (3^3)(3^-6) 2. S^2 t^-1 / (s^4 t^4)^1/2 3. [(2/3)^2]^-3

    asked by Kali
  222. 2nd grade math

    A number has more ones than tens. the value of the tens digit is 50. the ones digit in the number is less than 7. what are the possible numbers

    asked by Mythreyee
  223. physics

    A rock dropped into a pond produces a wave that takes 15.7 s to reach the opposite shore, 24.3 m away. The distance between consecutive crests of the wave is 3.5 m. What is the frequency of the wave?

    asked by Anonymous
  224. Sociology

    Research on children raised in orphanages has found that?

    asked by TY
  225. statistics

    Teenage smoking rate dropped to 8.5% in 2007 from 17.6% in 2001 and 23% in 1997. 1. Calculate the probability that at least one in a group of 10 teenagers smoked in 2007. 2. Calculate the probability that at least one in a group of 10 teenagers smoked in

    asked by rachel
  226. chemistry

    Can someone tell me what steps i need to take? So confused on how to solve this An average human adult takes about 15breaths per min and exhales 23ml of co2 with each breath. If your trapped in a cave with pressure .963atm and 11C and your only source of

    asked by ailee
  227. Physics

    Two children are playing on a 147-m-tall bridge. One child drops a rock (initial velocity zero) at t = 0. The other waits 1.2 s and then throws a rock downward with an initial speed v0. If the two rocks hit the ground at the same time, what is v0?

    asked by Chrissy
  228. Physics

    Your friend is an environmentalist who is living in a tree for the summer. You are helping provide her with food, and you do so by throwing small packages up to her tree house. If her tree house is 21 m above the ground, what is the minimum (initial) speed

    asked by Chrissy
  229. Math

    A new set of car tires has a tread depth of 8 millileters. The tread depth decreases 0.12 millimeter per thousand miles driven. Write an equation that gives the tread depth as a function of the distance driven. Then predict what distance the tread depth

    asked by Collins
  230. Math

    The quotient of a number and 15 is at least 3 n/15 ≥ 3

    asked by Coleson
  231. Math

    Write an inequality for each statement The product of 2/3 and x is no more than -16 2/3x ≤ -16

    asked by Coleson
  232. ratios

    what is the ratio of 4/5 over 1/6 in simplest form

    asked by Anonymous
  233. Analytical Chemistry (Titrations)

    About 10ml of concentrated HCl was transferred to a 1-L volumetric flash and diluted to mark with distilled water. When this solution was used to titrate a sample of pure sodium carbonate, Na2Co3, weighing 0.3054 gram, it took 35.09 ml to reach the methyl

    asked by Alex
  234. MATH ASAP!!

    Rationalize the denominator using the conjugate. 1/1-√7+√5 please show all the steps and explain it

    asked by sunny
  235. Chemistry

    How much energy must you use to raise the temperature of 100 grams of water from 60 degrees Celsius to 70 degrees Celsius? show you calculations. I am confused on how to use formulas.

    asked by Michael
  236. physic

    The distance between two nearest nodes of a standing wave is 16.3 cm. Hand generated pulses move up and down through a complete cycle four times every seven seconds. Find the velocity of the wave. Answer in units of m/s.

    asked by Anonymous
  237. Math

    5y^3 ( -x^4) When x is -2 and y is -1

    asked by Sally
  238. math

    a radio uses one-third the number of watts used by lamp, and a heater that uses 15 times as many watts as a lamp. when all are in use, the total electrical power is 1.1 kilowatts how many does the radio use?

    asked by sara
  239. Physics

    A car enters the freeway with a speed of 7.2 m/s south and accelerates uniformly for 4.2 km in 4.0 min. How fast (in m/s) is the car moving after this time? I only need the formula. My teacher gave us a list but did not tell the class which equation is for

    asked by Selena
  240. math

    -5 an 7/12 divided by 12 equals

    asked by David
  241. science

    ind the molality of the solution obtained when 36.5 gram HNO3 is dissoloved in 750 gram water

    asked by tanay patel
  242. Physics

    A television tube operates at 20,000V. What is min wavelength for the continuous x-ray spectrum produced when the electrons hit the phosphor?

    asked by Derick
  243. Physics

    If a 6.0keV photon scatters from a fee proton at rest, what is the change in the photon's wavelength if the photon recoils at 90 degrees?

    asked by Sarah
  244. Organic Chem Help

    Can someone explain how crystallization works to produce a product that is purer than the input material. Thank you!

    asked by Simon
  245. Math please help

    Simplify & write the answer using positive exponents: 1. (3^3)(3^-6) 2. S^2 t^-1 / (s^4 t^4)^1/2 Simplify then evaluate, express answer to 4 decimal places where nessasssary : 3. [(2/3)^2]^-3 4. [(1-4)^-3 Divide (1/4)^2]^-2

    asked by Kali
  246. Physics

    A television tube operates at 20,000V. What is min wavelength for the continuous x-ray spectrum produced when the electrons hit the phosphor?

    asked by Paul
  247. Physics

    If a 6.0keV photon scatters from a fee proton at rest, what is the change in the photon's wavelength if the photon recoils at 90 degrees?

    asked by Paul
  248. alagbra

    5-4(12-3y)=

    asked by michelle
  249. Physics

    A motorcyclist traveling 35.0 m/s realizes suddenly that he is headed straight for the edge of the Grand Canyon 50.0 m away. He immediately begins to brake, decreasing his speed at a rate of 7.00 m/s^2. With what velocity will he fly off into the canyon?

    asked by Andy
  250. chemistry

    Would a substance with a density of 7.89 kg/dm^3 float on a substance that has a density of 14.2 g/ml?

    asked by Jim
  251. International Law

    Hello What two nations has the United Nations intervened. I have Cuban and Angola, Israel and Arab States. I am looking for more examples. Thank You

    asked by Jerri
  252. math

    Theater prices: Adult- $6.00 Student- $3.00 4 adult tickets and 6 student tickets on a night that offers the special deal that a free ticket is given with each ticket purchased

    asked by Jake
  253. physics

    A spring with a spring constant of 53.0 N/m is attached to different masses, and the system is set in motion. What is its period for a mass of 2.7 kg?

    asked by Anonymous
  254. Math

    Bricks have a mass of 1.57 kg each. How many bricks are there in 5whole number 1/4tonnes ?

    asked by Nuwel
  255. Math

    1/5 of the people in a village have been inoculated against measles. If 50 people have been inoculated, what is number of people in the village.

    asked by Nuwel
  256. math statistics

    A group of teenager smoking rate dropped 8.5% in 2007 from 17.6% in 2001 and 23% in 1997. 1. Calculate the probability that at least one in a group of 10 teenagers smoked in 2007.2. Calculate the probability that at least one in a group of 10 teenagers

    asked by rachel
  257. MATHS

    Three fair coins are tossed at the same time. What is the probability that one of the coins will show heads and other two will show tails?

    asked by Bryan
  258. chemistry

    Oops I left a part of the question out: 2. Mercury poisoning is a debilitating disease that is often fatal. In the human body, mercury reacts with essential enzymes, leading to irreversible inactivity of these enzymes. If the amount of mercury in a

    asked by Brooke
  259. Linear Algebra

    Show that the set [(3,-2,4),(1,2,-1), (-6,4,-8) is linearly dependent by writing a non-trivial liner combination of the vectors that equals the zero vector. After some calculations I got t1=2, t2=0 and t3=1, but its my understanding that if a set is

    asked by Jervis
  260. english

    how do u write an outline over someone you admire like for instant my cousin who helped me in band, athletics and school work??

    asked by tessa
  261. Math

    In an examination, 1/5 of the candidates failed. It is known that 240 candidates passed. How many candidates took the examination

    asked by Nuwel
  262. Physics

    A car is traveling at 72 km/hr. The driver begins to apply the brakes and the begins to slow with a constant acceleration (a). After the brakes are applied, the car stops in a distance of 100 m. What is the acceleration? My teacher gave the class a list of

    asked by Angie
  263. physics

    You are riding a carousel that is turning at a constant angular velocity. You must pull toward the center with 100N of force to stay in place. You decide to move radially toward the center of the carousel to ride on a small animal figure that is at half

    asked by Girma
  264. algebra

    1.Find an equation of the line that passes through (4,3) and is parallel to the line 3x-y=7. 2. Find the equation of the line through (4,3) perpendicular to the line 3x+y=7. Please show work so I know how to do it

    asked by Hannah
  265. Math

    The sine ratio is positive in the first and what other quadrant?

    asked by Alex
  266. calculus

    Find the derivative of (6x^2+4y^2)/(3x+7y)=3 using implicit and quotients rule. Thank you!

    asked by MathLover
  267. math

    the expression that is equivalent to -2(x - 7).

    asked by hannah
  268. math

    12.5% =.125=125/1000 or 12 5/10=12 1/2 m confused

    asked by taylor
  269. Math

    Show that the set [(3,-2,4),(1,2,-1), (-6,4,-8) is linearly dependent by writing a non-trivial liner combination of the vectors that equals the zero vector. After some calculations I got t1=2, t2=0 and t3=1, but its my understanding that if a set is

    asked by Jervis
  270. math,algebra

    (3^-1X^3)^2 x 12X^5 my work: 3/2X^6 x 12X^5= 36/2=18X^11 but the answer was 4/3X^11

    asked by Chris
  271. emergency please help me!!!

    I posted some questions just about an hour ago. I really need help please help me.

    asked by ANAHI
  272. FRACTION CONCEPTS

    I am a fraction whose numerator and denominator are both prime numbers less than 20. if you were to increase each term by 1, I would be equivalent to 1/2. what fraction am I?

    asked by JUSTIN
  273. algerbra

    I need some help please 7/10 / 1/8+4/5*1/2

    asked by jennifer
  274. College Pre-Calculus

    find a function m such that m(f) is the number of miles in f feet

    asked by Anonymous
  275. science

    Do all animals reproduce?

    asked by Anonymous
  276. Physics

    Starting from rest, Mr.M's bus achieves a velocity of 25 m/s in a distance of 1.0 km. Find the time and the acceleration. I don't know which formula to use. Delta T = Vf - Vi / Aavg ?

    asked by Selena
  277. Maths

    Ratio of the radius of the cylinder to the cone is 1:2 assume their height are the same find the ration of their volumes.

    asked by Mythily
  278. Algebra 2

    Explain how to find the slope of a line from a table of data.

    asked by Anonymous
  279. introduction to psychology ll

    Researchers have found that, during childhood:

    asked by trenee
  280. Chem---DrBob222

    -----Chromatograph----- Carrying out TLC on colorless compounds. Give two examples of methods to use in order to visualize the spots on the plates. Carrying out TLC with a mixture of two compounds A and B. A is less polar than B. on a reverse phase plate

    asked by YuYing
  281. introduction to psychology ll

    Toddlers are able to:

    asked by trenee
  282. Algebra 2

    Explain how to find the slope of a line from a table of data.

    asked by Victoria
  283. Math

    A ball is dropped from ten feet and caught after it touches the ground on the 30 th bounce, what is the distance traveled by the ball?

    asked by Alyssa
  284. French

    What is the difference between aller and vas? What is the difference between these two sentences? Il parle à Marie. Il parle de Marie.

    asked by Anonymous
  285. math

    Determine all values of k for which each pair of vectors is orthogonal. a) (1,2) and (k,k) b) (1,2,1) and (k,2k,4)

    asked by Kyle
  286. math

    The least common multiple of two numbers is 60 and one of the numbers is 7 less than the other number. What are the numbers? Justify your answer.����

    asked by shakinah
  287. science

    calculate the number of moles inside a soap bubble 1cm in diameter and 1atm pressure at a temperature of 25 degree celsius.

    asked by Samson
  288. Physics

    This is a vector problem. A man starts at home and runs 5 miles north and then 5 miles in a direction 23 degrees south of west. Now he wants to go back home in a straight line. How far does he need to go and in what direction? so i found that the

    asked by Sandy
  289. Pre-calculus/Trignometry

    Which of the following is a correct equation for the line passing through the point (-1,4) and having slope m = -3? A. y-4=-3(x+1) B. y=-3x+1 C. 3x+y=1 D. y=-1/4x-3

    asked by Anonymous
  290. math

    Samy bought 5 1/3 lb of apples to make some apple pie. What is the weight of the apples written as a decimal?

    asked by sacyrah
  291. Calculus I

    I have to determine if this function is either odd or even or neither. f(x)=x^3*abs(x^3) + x^3 I do not know how to approach this question as the absolute value is giving me trouble. Please help. Thanks.

    asked by Anonymous
  292. math

    Which number of players can be arranged in the shape of square?

    asked by sapna
  293. English

    1. The staff meeting will be held next Tuesday. 2. The staff meeting will be taken next Tuesday. 3. The staff meeting will be got next Tuesday. 4. The staff meeting will be finished next Tuesday. (#1 is grammatical, right? What about the others from

    asked by rfvv
  294. Math

    So she saw 461 dolphins that are 5 year so we don't need to estimate on this problem. So I did 461/5 is 92 is the answer. Then the said how many did he spot per summer in the 5 summers he worked so I think we need to divide the answer which is 92 and the

    asked by Annie