1. chemistry

    How much heat is needed to raise the temperature of 75 grams of copper from 35„aC to 57„aC? The specific heat of copper is 0.385 J/g „aC.

    asked by mario on December 7, 2011
  2. college

    a 50.0g silver spoon at 20.0c is placed in a cup of coffee at 90.0c. How much heat does the spoon absorb from the coffee to reach a temperature of 89.0c

    asked by Sam on February 17, 2009
  3. science

    "How many calories of heat are required to raise the temperature of 650 g of water from 13.0C to 20.0C? (Heat of water is 1.00cal/g X C) "

    asked by sharon on April 3, 2011
  4. Chemistry

    How many moles of oxygen gas (O2) are in a 2.50 L container at standard temperature and pressure? 2.24 x 10^1 mol O2 1.12 x 10^–1 mol O2 2.50 x 10^0 mol O2 5.60 x 10^1 mol O2

    asked by Quinn on December 11, 2018
  5. Physics

    A 5.0g silver spoon at 20.0C is placed in a cup of coffee at 90.0C. How much heat does the spoon absorb from the coffee to reach a temperature of 89.0C?

    asked by Leah on January 31, 2011
  6. Physics

    A 5.0g silver spoon at 20.0C is placed in a cup of coffee at 90.0C. How much heat does the spoon absorb from the coffee to reach a temperature of 89.0C?

    asked by Leah on January 31, 2011
  7. science

    What factors affect the function of an enzyme? pH, temperature, substrate concentration, as well as enzyme concentration are typical.

    asked by Jordan on September 4, 2006
  8. physics

    what is the final temperature when a 3.0 kg gold bar at 99 degrees Celsius is dropped into 0.22 kg of water at 25 degrees Celsius?

    asked by lenair on January 25, 2012
  9. Chemistry

    How much heat is required to raise the temperature of a 65-g sample of water from 32 degrees celsius to 65 degrees celsius

    asked by Lisa on February 11, 2012
  10. physics

    0.2 kg of ice at 0 degrees celcius is mixed with 500g of water at 25 degrees celcius. What is the resulting temperature?

    asked by Gibbons on June 22, 2010
  11. chemistry

    how does the solubility of gases in water compare to the solubility of solids in water as the temperature of the solution increases?

    asked by maggie on April 2, 2013
  12. chemistry

    The specific heat of aluminum is 0.214 cal/g·°C. Calculate the heat necessary to raise the temperature of 47.9 g of aluminum from 18.9°C to 62.2°C

    asked by joslyn on June 19, 2013
  13. chemistry

    When 51J of heat are added to 13g of a liquid, its temperature rises from 10.2 ∘ C to 12.6 ∘ C. What is the heat capacity of the liquid?

    asked by Anonymous on October 13, 2013
  14. Physics

    How much heat is required to raise the temperature of a 4.3-kg block of steel by 48 K? (The specific heat of this steel is 450 J/kg · K.)

    asked by Sierra on July 31, 2012
  15. physics

    A block of ice at 0 degree celsius is placed in a room whose temperature is also 0 degree Celsius explain what will happen?

    asked by diana on January 13, 2012
  16. college physics

    how can i find heat capacity of silver without there being a temperature in the problem the problem only lists the mass of the silver

    asked by maxie j on April 22, 2010
  17. physics

    What amount of heat is required to increase the temperature of 75.0 g of water from 22.3C to 36.1C? The specific heat of water is 4186 J/KgC.

    asked by Anonymous on March 5, 2012
  18. chemistry

    the temperature of a 20.0g sample of a metal(specific heat .03 J/g-C) is raised by 20C. How much heat has been absorbed by the metal?

    asked by matt on July 13, 2011
  19. chemistry

    the vapor pressure of pure water at 60 c is 157 mmHg. what is the vapor pressure of this solution at the same temperature, in mm Hg?

    asked by angel on August 25, 2014
  20. Physics

    A rectangular aluminum plate has an area of 0.41 m2 at 23°C. If it is heated until its area has increased by 4.4 10-6 m2, what is the final temperature of the plate? °C

    asked by Sierra on July 31, 2012
  21. college chem

    How much heat is absorbed by the calorimeter if the temperature change is 8 C and the calorimeter constant (Heat Capacity) is 3.3 J/K? Your Answer:

    asked by debra on March 8, 2010
  22. Calculus

    We can find some of the solutions of sin x = 0.2 graphically by graphing y = sin x and y = 0.2 (I was able to figure this one out) Use the graph below to estimate some of the solutions. (Let −3π < x < 3π.) Enter your answers as a comma-separated list.

    asked by Angela on April 14, 2015
  23. math

    please help me with this question. I just can't figure it out. A cylindrical jar of radius 6cm contains water. How many iron solid spheres each of radius 1.5cm are required to immerse into the jar to raise the level of water by 2cm?

    asked by A GOODSTUDENT on November 9, 2016
  24. Physics

    A 2.12 m tall basketball player wants to sink the ball into a basket located 14 m from the player, as in Figure P3.58. If he shoots the ball at a 46° angle, at what initial speed must he throw the basketball so that it goes through the hoop without

    asked by Anonymous on January 28, 2014
  25. Math

    If the bakery started with an extra $250 from the profits in December, describe how to use the information in the table to figure out the profit or loss of money at the bakery by the end of August. Then calculate the profit or loss.

    asked by Makenzey on October 6, 2015
  26. Microsoft Word

    I am trying to type a paper on word. I can't figure out how to turn off this function? when i go back and add text, it deletes what i have already written, letter by letter as i type. I can't just add a sentence in a paragraph because it is deleting. Any

    asked by amy on March 9, 2009
  27. Math

    I can not seem to figure out this question. Can someone please help? Two cards are drawn from an ordinary deck of 52 playing cards with replacement. What is the probability that A) both cards are the same color? B) both cards are from the same suit? C) How

    asked by B.B. on August 3, 2009
  28. 7th grade math worksheet

    Need help on how to actually do the rise/run and equations to figure out the anxwer to "What do you call a duck that steals?" worksheet. I can find the answer on your websight, but I need to show my work for numbers 1-6 using rise/run and numbers 7-18

    asked by Adam on February 17, 2011
  29. math 214

    A group of students on a hiking trip wants to find the distance AB across a pond (see the following figure). One student suggests choosing any point C, connecting it with B, and then finding point D such that

    asked by alicia on February 26, 2010
  30. Calculus

    An offshore oil well is 4 kilometers off the coast. The refinery is 5 kilometers down the coast (see figure). Laying pipe in the ocean is twice as expensive as on land. What path should the pipe follow in order to minimize the cost?

    asked by Kurfy on November 3, 2016
  31. Physics

    A block of mass 0.65 kg and density 650 kg/m³ is forced under the surface of the water by means of a spring (k = 60.0 N/m) that is fixed to the bottom of the container as shown in the figure. How much is the spring stretched? (the density of water is 1000

    asked by Rutgers on April 9, 2015
  32. Chemistry - please help!

    The decomposition of KClO3 produces oxygen gas and solid KCl. What mass of KClO3 must be decomposed to produce 126 L of oxygen gas at 133 Celsius and .88 atm? I know I need to use PV=nRT but I can't figure out how.

    asked by Alex on May 8, 2012
  33. physics

    A small sphere with a mass of 2.00×10−3 g and carrying a charge of 5.20×10−8 C hangs from a thread near a very large, charged insulating sheet, as shown in the figure . The charge density on the sheet is −2.40×10−9 C/m^2. Find the angle of the

    asked by canan on February 25, 2012
  34. Math

    A cone and a square based pyramid have slant heights of 6 inches . The diameter for the cone and the base edge of the pyramid are both 8 inches. How would I find which space figure has the greater surface area

    asked by Bailey on February 24, 2011
  35. chem

    how would i figure out this question? assume that 5.60 L of H2 at STP reacts with CuO according to the equation: CuO+H2 yields Cu+H2O a. how many moles of H2 react? b. how many moles of Cu are produced? c. how many grams of Cu are produced? i have no clue

    asked by Alicia on May 27, 2008
  36. physics

    A basketball player is standing on the floor 10.0 m from the basket as in the figure below. The height of the basket is H = 3.05 m, and he shoots the ball at an angle, è = 42.8°, with the horizontal from a height of h = 2.04 m. (a) What is the

    asked by Jessica on October 7, 2014
  37. math

    dwight made 13 shots at the basketball game on friday night and made a total of 30 points. she scored 5 more two pointers than three pointers. how many of each type of baskets did she make? Also make equations to help figure it out.

    asked by bob on December 20, 2015
  38. math

    Find the area of the shaded part in the figure. Use 3.14 for ƒàƒnand round your answer to one decimal place. the triangle as a cicle in the middle the right side is 15ft and the bottom side is 15ft what is the answer

    asked by derrick on October 10, 2008
  39. Statistics

    We are working on pivot tables with grouping. I have no trouble creating a table with variables and totals however, I cannot figure out how I can include Relative Frequencies and Percentage frequencies in the same pivot table - as shown in the book. Thanks

    asked by Shellie on August 29, 2009
  40. Geometry

    A secant and a tangent to a circle intersect in a 42 degree angle. The two arcs of the circle intercepted by the secant and tangent have measures in a 7:3 ratio. Find the measure of the third arc. If someone could help me figure out how to do the

    asked by Ann on February 11, 2015
  41. College Math - Quantitative Reasoning

    Hello, I could really use some help with this problem. If the national economy shrank at an annual rate of 7​% per year for three consecutive​ years, then the economy shrank by 21​% over the three​-year period. - Of course, I understand 7% would be

    asked by Emily on January 16, 2017
  42. chemistry

    A aqueous solution of acetic acid with a density of 1.25 g/ml is 30.0% by mass HC2h3O2 (MM=60.0) Compute the molarity of this solution. I figured out that if you divide 30.0 by the molar mass 60.0g which gives you .5 mol. I cannot seem to figure out what i

    asked by Aimee on February 23, 2009
  43. physics

    The two angled ropes used to support the crate in the figure below an withstand a maximum tension of 1300 N before they break. The left angle is 30dregres, and the right angle is 45degrees. What is the largest mass the ropes can support? m=?

    asked by andrea on September 20, 2010
  44. math

    Sketch f (x) = x + cos x on [-2pie,2pie ]. Find any local extrema, inflection points, or asymptotes. And find the absolute maximum and absolute minimum values of f on the given interval. i cant seem to figure out how to solve this

    asked by rudy on May 15, 2008
  45. math

    I'm not good at math! I need help with finding a decimal from a fraction. like 1/3, 13/15, 19/32 I can't figure out how to turn it into a decimal! Just divide the numerator by the denominator. Use long division or a pocket calculator. can u help mme

    asked by luke on March 13, 2007
  46. Math

    Sarah was trying to figure out her grades for her math course. she only knew the grade of 4 of the tests she had taken, However the class had taken 5 tests total. She scored a 94, 67, 83, and 93. If Sarah ended up with a grade of 90, what did she get on

    asked by JWL on January 21, 2015
  47. math

    how do i figure out this problem. the average human blink their eyes 6,205,000 times each tear. if a person is awake for 16 hours a day, how many times will she blink a day? a hour, a minute?

    asked by debi on October 12, 2008
  48. Physics

    In a common test for cardiac function (the "stress test"), the patient walks on an inclined treadmill (Figure 6-46). Estimate the power required from a 70 kg patient when the treadmill is sloping at an angle of 15° and the velocity is 3.10 km/h.

    asked by Luke on February 16, 2013
  49. grade 9 math slope equations

    question: slove by comparison and check your solution? a)2x-4y-5=0 3x+8y-4=0 my work so far: 2x-4y=5-------(1) 3x+8y=4-------(2) _____________ 6x-12y=15------(3) (3)-(4) 6x+16y=8-------(4) ____________________ 28y/28 = 7/28 y= .25 2x-4(.25)=5 2x-1+5 2x/2 +

    asked by rany on March 19, 2009
  50. Physics

    Problem 2- A 4 kg object is attached to a vertical rod by two strings, as in the Figure. The object rotates in a horizontal circle at constant speed 6 m/s. Find the tension in (a) the upper string and (b) the horizontal string.

    asked by Mariam on November 23, 2013
  51. Chemistry

    How many milliliters of O2 are consumed in the complete combustion of a sample of hexane, C6H14, if the reaction produces 325 mL of CO2? Assume all gas volumes are measured at the same temperature and pressure. The reaction is 2C6H14(g) + 19O2(g) ->

    asked by Luke on July 8, 2014
  52. physics

    1. A 0.400 kg sample of aluminum (c = 9.20 x 102 J/kg°C) at 95.0 °C is dropped into a 0.550 kg pot of water which is at 18.0 °C. What temperature will the mixture come to? 2. How much thermal energy is absorbed by a 0.0220 kg ice cube as it melts? The

    asked by anonymous on May 15, 2019
  53. Grade 12 Chemistry

    When 50.0 mL of 1.0 mol/L hydrochloric acid is neutralized completely by 75.0 mL of 1.0 mol/L sodium hydroxide in a coffee-cup calorimeter, the temperature of the total solution changes from 20.2 to 25.6. Determine the quantity of energy transferred, q,

    asked by Vanessa on April 15, 2014
  54. physics

    Milk with a mass of 0.021 kg and a tempera- ture of 13C is added to 0.12 kg of coffee at 94C. What is the final temperature? Assume the specific heat capacities of the two liquids are the same as water, and disregard any energy transfer to the liquids’

    asked by Heather on February 11, 2014
  55. Physics

    The oven draws 1100W of power, and you have determined that it heats with an efficiency of 51%. Using this information, determine the time t it would take to bring 240mL of water from 25C to 100C . Note that 4.2 J of energy is required to raise the

    asked by Mike on December 10, 2010
  56. Physics

    A 56kg adult is climbing up a staircase of 67m. By how much would her body temp increase if her lost energy went into increasing her body temperature during this climb (in C)? I calculated the required amount of joules to reach the top to be 37x10^4J but i

    asked by Alona on November 9, 2010
  57. Math

    9.The formula F=9/5 C+32 can be used to convert a temperature from degrees Celsius to degree Fahrenheit. Which of the following best represents 9/5? A.9.5 B.1.8 C.1 4/9 D.9 4/5 B 10.Mr.Cartwright bought 2 7/8 pounds of grapes for his lunches. If he paid

    asked by Jerald on April 13, 2013
  58. biology

    Which is an example of how biotic and abiotic factors interact? a. sunlight increases the temperature of pond water b. water and soil mix together to make mud **** c. tree roots split apart rocks in the ground d. humidity in the air forms

    asked by Anonymous on October 4, 2018
  59. Physical Science

    please help me understand this question If measurements of a gas are 50L and 300 kilopascals and then the gas is measured a second time and found to be 75L, describe what had to happen to the pressure (if temperature remained constant). Include which law

    asked by Amber on September 16, 2014
  60. physics

    A heart defibrillator passes 10.0 A through a patient’s torso for 5.00 ms in an attempt to restore normal beating. Find the temperature increase caused in the 8.00 kg of affected tissue if all the energy heats up the tissue with a specific heat capacity

    asked by carolyn on November 8, 2015
  61. Math

    Ms. Morgan's class studied the changes in average global temperature in math class as a part of their study of rational numbers. The table shows how each year varies from a base measure. Order the five years from coldest to warmest. A) -0.17°C < -0.10°C

    asked by conexus user on May 8, 2019
  62. physics

    A heart defibrillator passes 10.0 A through a patient’s torso for 5.00 ms in an attempt to restore normal beating. Find the temperature increase caused in the 8.00 kg of affected tissue if all the energy heats up the tissue with a specific heat capacity

    asked by carolyn on November 7, 2015
  63. Astronomy

    I have two stars A = 7150K and B = 4850K.A is 20 times brighter than B. Assuming L/Lv is the same for both stars find the ratio ofthe radii of A and B. I have the equation R/R= (L/L)^1/2(T/T)^2. I can do this for each star in terms of solar masses but i am

    asked by nichola on July 9, 2009
  64. CHEMISTRY

    In my lab report, I am asked to "Find the solubility of Ca(OH)2 in H2O as the temperature increases. Explain (in terms of energy) the reasons for this trend." From what I have found, Ca(OH)2's solubility goes down, but I have no idea why! It isn't a gas...

    asked by June on October 26, 2013
  65. English

    Each shipment of VSV-EBOV will be packed in a special container with dry ice, at a temperature of -80 degrees Celsius, or -112 degrees Fahrenheit. The vaccine was developed at the National Microbiology Laboratory in Canada. Can someone summarize this in

    asked by tHI on October 27, 2014
  66. Math/Trig

    The following is a table for the maximum temperature per month, for Boulder, CO Month|° F Jan:45.1 Feb:48.2 Mar:53.8 Apr:62.8 June:71.6 July:81.5 Aug:85.1 Sept:76.6 Oct:66.7 Nov:52.9 Dec45.5 Find the sinusoidal function that models this data. How do I do

    asked by CJ on January 14, 2011
  67. Chemistry

    When 80.0 mL of HCl is added to 80.0 mL of NH3OH, the temperature increases 2.5 celsius. Assuming the final solution has the same specific heat capacity as liquid water, the heat produced in the reaction between two solutions is: I don't get how to find

    asked by Wendy on February 22, 2015
  68. Chemistry

    When 80.0 mL of HCl is added to 80.0 mL of NH3OH, the temperature increases 2.5 celsius. Assuming the final solution has the same specific heat capacity as liquid water, the heat produced in the reaction between two solutions is: I don't know how to find

    asked by Wendy on February 22, 2015
  69. Chemistry

    In the troposphere the atmospheric pressure decreases about 10 kPa and the temperature decreases about 279 K for every kilometer above the earth's surface you go. As a weather balloon released from the ground rises up will its volume increase, decrease or

    asked by Vanessa S. on June 19, 2017
  70. Science

    Do you guys know of a website where i can find the average temperature of these biomes? Tundra, Tiaga, Temperate Deciduous Forest: Tropical Rainforest: Grasslands: Desert: Rivers: Lakes & Ponds: Coral Reefs: Temperate Oceans: thanks:)

    asked by Nicole on October 8, 2009
  71. Math

    the walls and ceiling of a hotel room need to painted. The floor is 20-foot square and the ceiling is 8 feet high. What is the surface area of the walls and ceiling to be painted? Ignore any doors or windows

    asked by Derp on May 22, 2016
  72. algebra 2

    The stopping distance d of a car after the brakes are applied varies directly as the square of the speed r. If a car travelling 70mph can stop in 270ft, how many feet will it take the same car to stop when it is travelling 60mph? Thank you.

    asked by Esther on March 17, 2011
  73. Geometry

    A floor measures 19' by 16'. There is a rug centered on the floor with a 2'border all the way around the rug. If the carpet cost 415.00 per square yard, find the cost of the rug. Remember: convert yards to feet.

    asked by jean on June 8, 2011
  74. Math

    an at display includes two sound-effects speakers. They need to be positioned on the wall so that when you stand midway between the speakers, you are no closer than 7 feet to either speaker. each speaker should be the same distance from the corner. How far

    asked by Anonymous on November 28, 2016
  75. algebra 2

    The stopping distance d of a car after the brakes are applied varies directly as the square of the speed r. If a car travelling 70mph can stop in 270ft, how many feet will it take the same car to stop when it is travelling 60mph? Thank you.

    asked by estherw on March 16, 2011
  76. math

    A rectangular dog pen that has the greatest possible area within a budget of 50$.A pen needs at least one gate for a dog. Fencing is $1.00 per foot, fence posts are $2.00 each and gates (3 feet wide) are $5.00 each. what is the area of a pen? pls help me

    asked by lee on May 21, 2015
  77. pyhsics

    A ball with a mass of 0.8 kg is kicked up the ramp with an initial speed of 22 m/s. What is the speed [m/s] of the ball at the top assuming no friction? Angle from which ball is kicked is 23 degrees and the horizontal leg is 7 feet long.

    asked by Jimmy on October 18, 2011
  78. Math

    Western hemisphere: A topographic quadrangle is a 30' series map (it covers 30' longitude and latitude). If the western longitude boundary is 120 degrees 02 feet 30 inches, what is the longitude of the eastern boundary?

    asked by Bee on October 21, 2009
  79. intermediate algebra

    A model rocket Is launched from a height of 50ft. The formula h=-16t^2+70t +50 describes the rocket's height,h,in feet seconds after it was launched. How long will it take the rocket to reach to reachthe ground?

    asked by Nellie on November 16, 2014
  80. Physics

    You throw a ball straight into the air from a height of 4 feet and with a speed of 8.22 m/s. The moment the ball leaves your hand you start running away at a speed of 3.36 m/s. How far are you from the ball, the moment it hits the ground? (what are the

    asked by Mel on February 3, 2014
  81. algebra

    calculated area of a room is 174.2 square feet and the actual area is 149.6 the question was 'What is the relative error of the area to the nearest ten-thousand?' Im confused about what is relative error and how can i get that?

    asked by sally on January 22, 2010
  82. math

    The stopping distance of a car after the brakes are applied varies directly as the square of the speed r. If a car traveling 80 mph can stop in 360ft, how many feet will it take the same car to stoop when its traveling 50 mph?

    asked by Kaegan on September 17, 2010
  83. Math

    A flooring company charges a homeowner a fixed labor charge of $V1 plus V2 per square foot of flooring.  If the total bill was T, what is the equation to show how many square feet of flooring the homeowner required?

    asked by Tina on July 27, 2017
  84. Algebra II

    A hill is inclined 15 degrees to the horizontal. A 40-foot pole stands at the top of the hill. How long a rope will it take to reach from the top of the pole to a point 68 feet downhill from the base of the pole?

    asked by Lyndsie on May 17, 2010
  85. algebra

    The stooping distance d of a car after the brakes are appied varies directly as the square root of the speed r. If a car traveling 40mph can stop in 90 ft., how many feet will it take the same car to stop when it is traveling 60 mph.

    asked by ll on June 1, 2012
  86. Algebra II

    A hill is inclined 15 degrees to the horizontal. A 40-foot pole stands at the top of the hill. How long a rope will it take to reach from the top of the pole to a point 68 feet downhill from the base of the pole?

    asked by Lyndsie on May 17, 2010
  87. Algebra 2

    The stopping distance d of a car after the brakes are applied varies directly as the square of the speed r. If a car travelling 70mph can stop in 270ft, how many feet will it take the same car to stop when it is travelling 60mph? Thank you.

    asked by Esther on March 16, 2011
  88. math

    Suppose that the position y (feet) of a projectile above the ground is described by the equation y=-16t^2+70t+2, where t is the time elapsed (seconds) since the object was launched. (A) What is the initial position of the object? (B) When will the object

    asked by Andrea on April 23, 2018
  89. algebra

    the stopping distance d of a car after the brakes are applied varies directly as the square of the speed r if a car travelling 80mph can stop in 360ft, how many feet will it take the same car to stop when it is travelling 70mph

    asked by karon on December 13, 2011
  90. ALGEBRA

    The velocity v (in feet per second) of a rock dropped into a well is related to time (in seconds) by the formula v = 32t. What is the velocity of the rock at the indicated instant? Write your answer in the form (t, v). (a) when the rock is released ( , )

    asked by Randy on April 25, 2012
  91. math

    The area of a rectangular swimming pool is given by 3x^2+11x+6 ft^2.One side length of the pool is given by 3x+2 feet. what is an algebriac expression for the other side length of the pool? simplify and include correct units

    asked by janice on February 6, 2011
  92. Physics

    A 57.5-kg skateboarder starts out with a speed of 1.80 m/s. He does +80.0 J of work on himself by pushing with his feet against the ground. In addition, friction does -265 J of work on him. In both cases, the forces doing the work are nonconservative. The

    asked by Anonymous on November 12, 2012
  93. math

    A ladder is leaning against the side of a house and forms an angle of 66o with the ground. The foot of the ladder is 11.3 feet from the base of the house. Find the length of the ladder to the nearest foot.

    asked by danielle on May 27, 2014
  94. Physics

    You throw a ball straight into the air from a height of 4 feet and with a speed of 8.22 m/s. The moment the ball leaves your hand you start running away at a speed of 3.36 m/s. How far are you from the ball, the moment it hits the ground?

    asked by Anonymous on February 3, 2014
  95. Physics

    You throw a ball straight into the air from a height of 4 feet and with a speed of 5.3 m/s. The moment the ball leaves your hand you start running away at a speed of 2.37 m/s. How far are you from the ball, the moment it hits the ground?

    asked by Anonymous on February 3, 2014
  96. Math7 grade

    Wallpaper was applied to one rectangular wall of the photographer s studio. .The dimension of the wall are shown below 42 ft by 25.5 feet .If the total cost of the wallpaper was &771.21, what was the cost of the wallpaper per square foot.

    asked by Anna on October 22, 2016
  97. math

    The sun hits a building of unknown height so that the building casts a shadow of 517 feet. If the angle of elevation from the tip of the shadow to the sun is 16 degrees, how tall is the building?

    asked by brad on April 17, 2016
  98. physics

    a television antenna is on the roof of the building. from a pt. on the ground 36.0 feet from the building , the angle of elevation of the top and the bottom of the antenna are 51 degree celsiusand 42 degree celsuis respectively. how tall is antenna?

    asked by jo on June 23, 2012
  99. Math

    A string is cut in half,and one of the halves is used to bundle newspapers. Then one fifth of the remaining string is cut off. The piece left is 8 feet long. How long was the string originally? Please work this out. The anwser is 20 ft. THANKS

    asked by Melea on December 7, 2010
  100. Math

    Turner measures 3/4 foot of ribbon for a costume.He needs 9 pieces of ribbon with that same length. Fill in the blanks to complete an equation that turner can use to find the total length of ribbon that he needs, in feet

    asked by Anonymous on January 21, 2016