Lina

Most popular questions and responses by Lina
  1. Math

    What does it mean to get a 150% salary raise?

    asked on January 20, 2016
  2. Physics

    A pilot flying low and slow drops a weight; it takes 2.8 s to hit the ground, during which it travels a horizontal distance of 100 m . Now the pilot does a run at the same height but twice the speed. How much time does it take the weight to hit the ground?

    asked on September 11, 2015
  3. Physics

    A cork gun contains a spring whose spring constant is 18.0 N/m. The spring is compressed by a distance ∆X = 6.0 cm and used to propel a cork of mass 7.66 g from the gun. Assuming the cork is released when the spring passes through its equilibrium

    asked on December 17, 2013
  4. Algebra

    The general equation for depreciation is given by y = A(1 – r)t, where y = current value, A = original cost, r = rate of depreciation, and t = time, in years. A car was purchased 6 years ago for $25,000. If the annual depreciation rate is 11%, which

    asked on September 23, 2015
  5. MATH

    A carpenter has a board that is 10 feet long. He wants to make 6 table legs that are all the same length. What is the longest each leg can be? Thanks

    asked on December 15, 2014
  6. chemistry

    A gas is confined to a container with a massless piston at the top. (Part C figure) A massless wire is attached to the piston. When an external pressure of 2.00 atm is applied to the wire, the gas compresses from 4.90 to 2.45 L. When the external pressure

    asked on March 25, 2011
  7. Tcc

    What are the magnitudes of (a) the angular velocity, (b) the radial acceleration, and (c) the tangential acceleration of a spaceship taking a circular turn of radius 3220 km at a speed of 29000 km/h?

    asked on April 10, 2014
  8. Algebra

    A type of plant is introduced into an ecosystem and quickly begins to take over. A scientist counts the number of plants after m months and develops the equation p(m)=19.3(1.089) raised to m, to model the situation. Most recently, the scientist counted 138

    asked on September 23, 2015
  9. english

    in robert frosts poem birches the lines you many see their trunks arching in the woods years afterwords training their leaves on the ground like girls on hands and knees that throw their hair ue which two poetic devices?

    asked on December 26, 2015
  10. Math 3rd grade

    2-Eric and Frank want to equally share 4/3 feet of rope. what length of rope should each friend get? Explain how to use a drawing to help solve the problem.

    asked on February 3, 2014
  11. US History

    Which region of this map was ceded by France to the United States? North Northeast *** South and southeast West The picture shows West Florida in the middle, the Gulf of Mexico below it, part of some other states near the sides and top.

    asked on January 4, 2017
  12. math

    How many faces, edges, and vertices does the solid figure have? image

    asked on March 21, 2014
  13. Algebra

    An equation for the depreciation of a car is given by y = A(1 – r)t , where y = current value of the car, A = original cost, r = rate of depreciation, and t = time, in years. The value of a car is half what it originally cost. The rate of depreciation is

    asked on September 23, 2015
  14. math

    Which equation has the complex number 4-3i as a root? 1) x^2+6x-25=0 2) x^2-6x+25=0 3) x^2+8x-25=0 4) x^2-8x+25=0 Can anyone please teach me how to do it?THANKS A LOT!!!

    asked on April 21, 2008
  15. Maths

    1. In the xy-coordinate plane, point A is the midpoint of the segment with endpoints (2,4) and (-4,-4). What is the distance from point A to the origin? I know how to find the distance between the two points- 10. But I don't know where to go from there. 2.

    asked on March 22, 2015
  16. CHEM HELP ANYONE ASAP

    Arrange the members of the following set of cations in order of increasing ionic radii: Sr2+ Ba2+ Rb+ K+ I understand that Sr2+ = 132 pm Ba2+ = 149 pm Rb+ = 166 pm K+ = 152 pm increasing ionic radii ....Sr2+ , Ba2+ , K+, Rb+ But the its not going in online

    asked on October 31, 2012
  17. Physics

    The mass of an astronaut is 72kg. (a) what is his weight on earth ( taking g to be 10N/kg) ? (b) if the astronaut is on the moon's surface where the acceleration due to gravity is one-sixth on the earth , calculate (I) the mass (ii) the weight of the

    asked on June 2, 2011
  18. Statistics

    8.11) For the manufacturing plant discussed in Exercise 8.10, the union president and the human resources director jointly select a simple random sample of 36 employees to engage in a discussion with regard to the company’s work rules and overtime

    asked on July 23, 2009
  19. Math

    Explain how you would convert a measurement given in ounces into pints

    asked on February 10, 2014
  20. Economic

    in the early 1980s when the Polish people had to stand in long lines to purchase most consumer goods, the government ordered that every third place in line be reserved for pregnant women or disabled persons. this was presumably done to reduce their

    asked on March 1, 2017
  21. chem

    Calculate the ph of a buffer solution that is 0.10M in ammonia and 0.15M in ammonium chloride .kb for ammonia is 1.8*10^-5

    asked on May 12, 2010
  22. Simple Probability Question

    A small manufacturing company has rated 80% of its employees as satisfactory and 20% as unsatisfactory . Personnel records show that 75% of the satisfactory workers had previous work experience in the job they are now doing, while 30% of the unsatisfactory

    asked on May 13, 2014
  23. Math

    A monument consists of two cubical blocks of granite, the smaller resting on the larger. The total height of the monument is 5 feet, and the area of the exposed surface is 61 square feet. Find the dimensions of the blocks. Help please>.< Thank you in

    asked on June 1, 2014
  24. Chemistry

    How will the equilibrium: Heat energy + CH4 + 2H2S = CS2 + 4H2 be affected by the following? a) A decrease in temperature? b) The addition of H2 c) The removal of some CH4 d) An increase in the volume of the container e) The addiotion of a catalyst. i know

    asked on May 31, 2011
  25. physiC

    A uniform door (0.81 m wide and 2.1 m high) weighs 150 N and is hung on two hinges that fasten the long left side of the door to a vertical wall. The hinges are 1.9 m apart. Assume that the lower hinge bears all the weight of the door. Determine the

    asked on March 1, 2011
  26. Statistics

    For the manufacturing plant discussed in Exercise 8.10, the union president and the human resources director jointly select a simple random sample of 36 employees to engage in a discussion with regard to the company’s work rules and overtime policies.

    asked on July 22, 2009
  27. physics

    A figure skater glides along a circular path of radius 4.70 m. (a) If she coasts around one fourth of the circle, find the magnitude of the displacement vector. m (b) If she coasts around one fourth of the circle, find what distance she skated. m (c) What

    asked on February 5, 2016
  28. Maths..

    Uh...Yea... Sorry about this, but I"m trying to study and I need someone to walk me through, missed a lot of school. fyi, when there's a / its under the entire string before it until you hit the inequality symbol. Tony Bowled 135 and 145 in his first two

    asked on October 21, 2015
  29. Math

    Ryan bought 2 1/4 pounds of almonds and divided them into bags with 1/8 pound in each bag.

    asked on April 9, 2016
  30. Math

    If 2 gulps = 5 slurps, and 2 slurps = 7 sips, then 35 sips is equal to how many gulps?

    asked on December 8, 2016
  31. chemistry

    What volume of oxygen(in Liters) at 25 degrees C and 1.05 atm is needed to completely combust 2.65L of methane, measured at STP

    asked on March 30, 2015
  32. Geometry

    Write a two column proof. Given: angle STV is congruent to angle TVU, angle STU is congruent to angle UVS. Prove: Angle SVT is congruent to angle UTV.

    asked on February 25, 2012
  33. math

    if the product of five tenths and three tenths is subtracted from the sum of two tenths and six tenths what is the difference

    asked on February 26, 2018
  34. Physics

    Also got lost on this question: A rescue plane wants to drop supplies to isolated mountain climbers on a rocky ridge 235m below. If the plane is traveling horizontally with a speed of 250 km/h (69.4 m/s), (a) how far in advance of the recipients

    asked on January 18, 2016
  35. Algebra

    A passenger boat which travels 6 mph faster than a freighter required 3 days less time to make a trip of 2592 miles. Find the rate of the passenger boat.

    asked on May 9, 2014
  36. Physics

    A mass M = 40.0 kg is suspended by a massless string from the ceiling of a van which is moving with constant acceleration a, as shown in the figure. If the string makes an angle theta = 21° with respect to the vertical, what is the acceleration a of the

    asked on December 24, 2013
  37. Micro Economics

    A nation's production possibilities curve is "bowed out" from the origin because a. resources are not equally efficient in producing every good c. resources are scarce d. wants are virtually unlimited . John has a paper route and spends all his weekly

    asked on April 3, 2007
  38. Algebra

    Calvin deposits $400 in a savings account that accrues 5% interest compounded monthly. After c years, Calvin has $658.80. Makayla deposits $300 in a different savings account that accrues 6% interest compounded quarterly. After m years, Makayla has

    asked on September 23, 2015
  39. Chemistry for Engineers

    A gas is confined to a container with a massless piston at the top. (Part C figure) A massless wire is attached to the piston. When an external pressure of 2.00 atm is applied to the wire, the gas compresses from 4.90 to 2.45 L. When the external pressure

    asked on March 25, 2011
  40. Physics

    A particle P travels with constant speed in a circle of radius 7.3 m and completes one revolution in 34.0 s (see Figure). The particle passes through O at t = 0 s. What is the magnitude of the average velocity during the interval from t = 11.9 s and t =

    asked on December 17, 2013
  41. Physics

    A cork gun contains a spring whose spring constant is 18.0 N/m. The spring is compressed by a distance ∆X = 6.0 cm and used to propel a cork of mass 7.66 g from the gun. Assuming the cork is released when the spring passes through its equilibrium

    asked on December 17, 2013
  42. pre-calculus

    Rewrite the expression so that it involves the sum or difference of only constants and sines and cosine to the 1st power (sinx)^4

    asked on April 3, 2012
  43. Math

    A sport arena covers 710,430 square feet of ground. A newspaper reported that the arena covets about 700,000 square feet of ground. To what place value was the number rounded?

    asked on October 7, 2015
  44. accounting

    rigoberto invests 8,000 at 6% interest, compound semiannually for 1 year

    asked on April 3, 2015
  45. Math

    Tim ate some chocolate cake for an afternoon snack He left 3/4 of the cake. If his parents ate 1/3 of the remaining cake for dinner, write a multplication problem to represent how much cake tims parentd ate

    asked on December 2, 2010
  46. physics!!! Damon?

    The graph at the right is a positive vs. Time graph for the motion of an object moving along a horizontal (x) axis For each of the 8 1-second time intervals, describe the displacement, instantaneous velocity (+/- and whether the velocity is increasing or

    asked on January 6, 2016
  47. physics

    Your spaceship lands on an unknown planet. To determine the local value of g, you ask a steel-toed crew member to kick a stone, and you find that if she kicks it at 18.0m/s at various angles, the maximum range she can achieve is 30.8m. What is g on this

    asked on September 15, 2009
  48. Chem

    2. Suppose a chemistry student made 2000. mL of 6.00 M HCl. He accidently spilled half of this solution on the floor. What is the Molarity of HCL left in the beaker? Explain the answer... - for this problem, would I use the eq'N, M1V1=M2V2. 3. What is the

    asked on January 31, 2017
  49. pre-calculus

    use a sum or difference formula to find the exact of the trigonometric function cos(-13pi/12)

    asked on April 3, 2012
  50. Statistics

    city law enforcement has state that 20% of items sold by paywn within city stolen john purchase 4 items from city pawn shop for x=the number of john purchase that have been stolen how I can determine:a P(x=0, b P(2

    asked on July 21, 2009
  51. Social Studies

    What is a sentence that explains how the terms tributary and drainage basin are related

    asked on November 15, 2017
  52. Math

    Oliver has one juice box. Lucy has one fewer juice box than oliver. How many juice boxes does lucy have?

    asked on October 10, 2016
  53. Maths

    |a|-3/4=-5/8 a. 1/8 or -1/8 b. 7/8 or -7/8 c. 1 3/8 or -1 3/8 d. No solution could someone walk me through perhaps? I missed a ton of class.....So did Fae.

    asked on October 9, 2015
  54. math

    The length of a rectangle is 3 m more than double the width, and the area of the rectangle is 54 m^2. Find the dimensions of the rectangle.

    asked on May 5, 2015
  55. child development

    (Penn Foster) 1- Neueon development and elaboration, which occurs between birth and age 10, is prompted by: A -aural prompts from the famiy school and environment. B-physical movement on the part of the child C- Intake of foods rich in vitamins and

    asked on February 14, 2011
  56. Science

    I forgot my book in my desk and have homework over the weekend!! HELP ME!

    asked on October 1, 2010
  57. Math Grade 5

    The Eatery Restaurant has 200 tables. On a recent evening, there were reservations for 1/10 of the tables. How many tables were reserved?

    asked on September 16, 2015
  58. Business calc

    A total revenue function is given by R(x) = 1000(x^2 - 0.1x)^1/2 , where R(x) is the total revenue, in thousands of dollars, from the sale of x items. Find the rate at which total revenue is changing when 20 items have been sold.

    asked on February 19, 2013
  59. 8th grade History

    Where was the site of the Battle of Fort Sumter in the Civil War? Thanks!

    asked on February 3, 2011
  60. 8th grade science

    Can a secondary consumer be eaten by another secondary consumer? Thanks! :-)

    asked on February 1, 2011
  61. 8th grade Math

    Hi I need help with my math problem. It is: Name the function rule from the table given. Table- X= Y= -4 4 -2 2 0 0 answers: y = -x y = -4 y = 2x y = x I do not get how to solve this problem!

    asked on January 13, 2011
  62. biochemistry

    Calculate the pH change of 10mL of HCl added to 1M phosphate buffer in 1L with initil pH of 7.2?

    asked on September 28, 2010
  63. statistics

    A researcher has observed independent samples of females and males, recording how long each person took to complete his or her shopping at a local mall. The respective times, in minutes, are listed in file. Using the 0.025 level of significance in a

    asked on August 10, 2009
  64. statistics

    Please only the formula and steps to do this problem. Thank you An assembly process includes a torque wrench device that automatically tightens compressor housing bolts; the device has a known process standard deviation of ó = 3 lb-ft in the torque

    asked on August 2, 2009
  65. statistics

    Please only the formula and step I need for this problem. thank you In response to media inquiries and concerns expressed by groups opposed to violence, the president of a university with over 25,000 students has agreed to survey a simply random sample of

    asked on August 2, 2009
  66. physics

    A steel beam is used in the construction of a skyscraper. By what fraction (change in L)/(Lo) does the length of the beam increase when the temperature changes from that on a cold winter day (-15 F) to that on a summer day (+105 F)? Can anyone please give

    asked on February 10, 2008
  67. Math

    Write your answer in standard form. Show all your work if you want to be eligible for partial credit. Write the equation of a line perpendicular to the line y = (2/3)x - 7 and passing through the point (4,-2). The slope of the line y = (2/3)x - 7 is 2/3.

    asked on November 7, 2006
  68. 5th grade math

    Marty had 316 keys and Nick had 541 keys. After both of them lost the same number of keys, Nick had 6 times as many keys as Marty. How many keys did each of them lose?

    asked on September 29, 2018
  69. Math

    Jon's test grades are 76,84,83 and 78.What does he need to make on his next test to have an 83 average?

    asked on April 17, 2017
  70. Physics

    Calculate the thermal energy required to convert 5kg of ice at 0 Celsius to steam at 100 Celsius

    asked on February 19, 2016
  71. physics

    A student stands at the edge of a cliff and throws a stone horizontally over the edge with a speed of 22.0 m/s. The cliff is h = 38.0 m above a flat horizontal beach, as shown in the figure below. How long after being released does the stone strike the

    asked on February 5, 2016
  72. Physics

    I did the problem but i'm confused on what to do next: 1.A hunter aims directly at a target (on the same level) 120m away. (a) If the bullet leaves the gun at a speed of 250m/s, by how much will it miss the target? (b) At what angle should the gun be aimed

    asked on January 18, 2016
  73. Chemistry Really Confused!!

    'm confused on how to set up the problem for each question.. 1.) Calculate the empirical formula of a compound if a 6.21 g sample contains 1.67g of cerium and the remainder iodine 2.) An unknown compound contains 85.64% carbon with the remainder hydrogen.

    asked on January 16, 2016
  74. Chemistry

    I'm confused on how to set up the problem for each question.. 1.) Calculate the empirical formula of a compound if a 6.21 g sample contains 1.67g of cerium and the remainder iodine 2.) An unknown compound contains 85.64% carbon with the remainder hydrogen.

    asked on January 16, 2016
  75. Socials

    How did the building of the transcontinental railway benefit the country? I know that First Nations were kicked off their farmland to make way for the building of the railway and for settlers(why would settlers need the land?). Why was the railway so

    asked on May 5, 2015
  76. ALGEBRA

    perimeter = 24 feet triangle that have one side is b =? second side is b =? third side is b - 3 =? How to solve this problem?

    asked on April 24, 2014
  77. math

    write the direct variation equation for the following:y varies directly with x and y=60 when x=10

    asked on June 11, 2013
  78. math

    If r = 12.5 and s = |−13|, which of the following inequalities is not true??? 1.r≠s 2.r< s 3.r≥s 4.r≤s

    asked on March 20, 2013
  79. Physics

    A long solenoid ( radius = 1.8 cm) has a current of a 0.33 A in its winding. A long wire carrying a current of 22 A is parallel to and 1.2 cm from the axis of the solenoid. What is the magnitude of the resulting magnetic field at a point on the axis of the

    asked on October 6, 2011
  80. geometry

    A rectangular garden 10m * 18m . Find the area of a sidewalk that is 2m from the side of a garden ?

    asked on June 21, 2011
  81. Physics

    A lift is pulled up to the top of a building by a constant force of 6400N at a constant speed of 2m/s. It takes 3mins to reach the top. (a) how much work is done in raising the lift to the top of the building ? (b) what is the power required ?

    asked on June 2, 2011
  82. Health, Safety, and Nutrition (Penn Foster)

    Health, Safety, and Nutrition 1. Today in class you’re going to talk to your students about Vitamin C and what it does for a person’s body. From which one of the following food groups should you select your snack for today? A. Bread, cereal, rice, and

    asked on February 14, 2011
  83. physics

    A man stands on the roof of a 19.0 m-tall building and throws a rock with a velocity of magnitude 30.0 m/sat an angle of 42.0 degrees above the horizontal. You can ignore air resistance. Calculate the maximum height above the roof reached by the rock.

    asked on September 14, 2009
  84. physics [vectors]

    The concept i get, but somehow i just can't execute this problem, please help me! You are given vectors A = 5.5 6.2 and B = - 3.7 7.4 . A third vector C lies in the xy-plane. Vector C is perpendicular to vector A and the scalar product of C with B is 19.0.

    asked on August 30, 2009
  85. statistics

    Please, give the formula and steps to do this problem. Thank you The average length of a flight by regional airlines in the United States has been reported as 299 miles. If a simple random sample of 30 flights by regional airlines If The average length of

    asked on August 2, 2009
  86. Math

    What would be considered as a competitive interest rate and was is a compeititve interest rate?

    asked on May 23, 2008
  87. Math

    14 2 7 3 9=10 insert symbols to make it work 9*2 11 8 4 1=60

    asked on September 11, 2015
  88. Math

    If a, b, and c are three integers in geometric progression, prove that the number a^2+b^2+c^2 is exactly divisible by the number a+b+c.

    asked on May 6, 2014
  89. Physics

    A particle P travels with constant speed in a circle of radius 7.3 m and completes one revolution in 34.0 s (see Figure). The particle passes through O at t = 0 s. What is the magnitude of the average velocity during the interval from t = 11.9 s and t =

    asked on December 17, 2013
  90. chemistry

    the molar mass of NaOH is 40g/mol, how many grams ofNaOH are required to yield 0.65 mol?

    asked on March 9, 2013
  91. math

    oliver can jog about 3 times as fast as he can walk. If his average walking rate is one mile in 20 minutes, about how far could he jog in 2 hours?

    asked on February 20, 2013
  92. Chemistry

    Kinetic energy = 1/2 mv^2 where m is the mass of the particle and v is the velocity of the particle. A joule is the SI unit for energy and is kg.m^2/s^2. Find the energy in joules of a 56.7 g mass moving at the speed of 70. km. hr.

    asked on November 5, 2012
  93. Physics

    A long solenoid ( radius = 1.8 cm) has a current of a 0.33 A in its winding. A long wire carrying a current of 22 A is parallel to and 1.2 cm from the axis of the solenoid. What is the magnitude of the resulting magnetic field at a point on the axis of the

    asked on October 6, 2011
  94. Physics

    A long solenoid ( radius = 1.8 cm) has a current of a 0.33 A in its winding. A long wire carrying a current of 22 A is parallel to and 1.2 cm from the axis of the solenoid. What is the magnitude of the resulting magnetic field at a point on the axis of the

    asked on October 6, 2011
  95. Physics

    A long solenoid ( radius = 1.8 cm) has a current of a 0.33 A in its winding. A long wire carrying a current of 22 A is parallel to and 1.2 cm from the axis of the solenoid. What is the magnitude of the resulting magnetic field at a point on the axis of the

    asked on October 6, 2011
  96. Physics

    A long solenoid ( radius = 1.8 cm) has a current of a 0.33 A in its winding. A long wire carrying a current of 22 A is parallel to and 1.2 cm from the axis of the solenoid. What is the magnitude of the resulting magnetic field at a point on the axis of the

    asked on October 6, 2011
  97. Maths SUPER URGENT

    Hey What size down pipe would I need, and how many if my roof area equals 1224.78 metres squared and I have average rainfall of 173kl per year? Also how much plumbing would I need from my hypothetical tanks?

    asked on May 8, 2011
  98. world history

    Which of the following was the first known king of Mesopotamia? A. Sargon B. Lipit-Ishtar C. Hammurabi D. Gilgamesh

    asked on February 26, 2011
  99. 8th grade science

    I need help figuring out this on a food web. It goes from a flower to a butterfly to a frog to the bird to a coyote. Now I have to label them. I got them all however i do not know what the frog and bird is. HELP!! :-)

    asked on February 1, 2011
  100. statistics

    If a sample of size 30 is selected, the value of A for the probability P(t greater or less A) = 0.01 is?

    asked on August 1, 2009

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