Questions Asked on
February 12, 2013

  1. Chemistry

    Which of these solutions is the most basic? [H+] = 1 x 10^–2 M [OH–] = 1 x 10^–4 M [H+] = 1 x 10^–11 M [OH–] = 1 x 10^–13M I think it is C - please explain - I'm guessing and don't really understand..Thanks

    asked by Cassie
  2. algebra

    what is the 10th term of the sequence 81,27,9 can someone please explain the steps. possible answers; 1/729 1/243 1/81 1/810

    asked by ciara
  3. Math Help Please!!!!

    Which type of angle do construction workers use when building to make sure that the walls and floors of a building are perpendicular?

    asked by Bell
  4. maths-urgently needed

    In right angled triangle ABC angle B=90 degree and AB= root 34 unit. The coordinates of point B and Care (4,2)and (-1,y) respectively. If area of triangle ABC = 17 sq.units, then find value of y.

    asked by Anonymous
  5. Physics

    A student has a weight of 650 N. While riding on a roller-coaster this same student has an apparent weight of 1.97 x 103 N at the bottom of a loop that has a radius of 17.0 m. The speed of the roller-coaster is I just need the forumla, doesn't even have to

    asked by Eve
  6. Chemistry

    Acetic acid ionizes in water as follows: CH3COOH + H2O CH3COO– + H3O+ Fewer than 1% of ethanoic acid molecules are ionized at any instant. The acetate ion (CH3COO– ) is therefore ____. A.a poor hydrogen-ion acceptor B.a good hydrogen-ion acceptor C.a

    asked by Cassie
  7. algebra

    Robin bought a computer for $1,250. It will depreciate, or decrease in value, by 10% each year that she owns it. a) Is the sequence formed by the value at the beginning of each year arithmetic, geometric, or neither? Explain. b) Write an explicit formula

    asked by lee
  8. World history; Check:P

    Before the 1500s, who and what were the final authorities with regard to most knowledge? The church and it's leaders, the bible, and the king/queen. If they could not come up with an answer to a question, they would say that God did it. 2.What was the

    asked by Unknown
  9. algebra

    I have 3 questions I need help with. 1) what is the 15th term of the sequence 81,27,9,... 2) what is a possible value for the missing term of the geometric sequence 39,_,975,_ 3) what is the sum of the finite arithmetic series (-5)+0+5+10+..+65

    asked by lee
  10. World history; Check:P

    1.What was the significance of the Twelve Tables? The Twelve Tables were significant because they were an early example of written law displayed publicly for all who could read them. They were later used as the laws for Rome. "The Twelve Tables established

    asked by Unknown
  11. Chem II

    How many grams of ethylene glycol (C2H6O2) per kilogram of water are needed to give protection up to 120 °C in a car radiator?

    asked by jenny
  12. Chemistry

    How much heat is necessary to change a 52.0 g sample of water at 33.0 C into steam at 110.0 C?

    asked by E
  13. physic

    two point charges are located on the y axis as follows : charge q1 = -1.50nc at y= -0.600m, and charge q2 = +3.2nc at the origin (y=0) what is the net force (magnitude and direction) exerted by these two charges on a third charge q3 = +5.00 nc located at y

    asked by yanis
  14. Maths

    If sec(x+y),sec(x),sec(x-y) are in A.P. then prove that cosx= +-√2 cos y/2 where cosx and cosy are not equals to 1,

    asked by Kinjal
  15. Rate Constants

    I'm really stuck with this one. Here's the rate law and the data that is needed. I appreciate any help Rate= k[I2]X{[H+]Y[CH3COCH3]Z Trial Volume of 0.0010 M I2 Volume of 0.050 M HCl Volume of 1.0 M acetone Volume of water Temperature (degrees C) Reaction

    asked by Amy
  16. chemistry

    In a household radiator, 1000 g of steam at 100 C condenses. How much heat is released?

    asked by G
  17. physic

    two point charges are placed on the x axis as follows: charge q1 +4.00nc is located at x = 0.200m, and charge q2 = +5.00nc is at x = -0.300m what are the magnitude and directionof the net force exerted by these two charges on a negative point charge q3 =

    asked by yanis
  18. Math

    Jenna lives 4 3/10 miles from school, she estimates that she travels 4 x2x5 or 40 miles each week. Is her estimate an over estimate or underestimate? I think it is under estimate but not sure?

    asked by Jared
  19. Mathematics -- Geometry --

    A bowling ball is a solid ball with a spherical surface and diameter 30 cm. To custom fit a bowling ball for each bowler, three holes are drilled in the ball. Bowler Kris has holes drilled that are 8 cm deep and have diameters of 2 cm, 2 cm, and 3 cm.

    asked by Knights
  20. Chemistry

    A base has a Kb of 2.5 x 10–11. Which of the following statements is true? A.This is a concentrated base. B.This base ionizes slightly in aqueous solution. C.This is a strong base. D.An aqueous solution of this base would be acidic. My answer is D...?

    asked by Cassie

    the ability to grow in size is a characteristic of living organism .Although an icicle may grow in size over time,it is considered nonliving because there is 1)an incerase in matter ,but no increase in the number of icicle. 2)an interaction between the

    asked by tania sharmin
  22. Physics

    A quantity of monatomic ideal gas expands adiabatically from a volume of 2.0 liters to 6.0 liters. If the initial pressure is P0, what is the final pressure?

    asked by Alex
  23. chemistry

    What volume of 0.1 M NaOH is required to neutralize 30 mL of 0.1 M HCl?

    asked by Anonymous
  24. Chemistry

    A substance of Ka of 1 x 10^–5 would be classified as a ____. A.strong acid B.weak acid C.strong base D.weak base I think it is B...?

    asked by Cassie
  25. algebra

    The volume of gas varies directly with temperature and inversely with pressure. Volume is 100 m^3 when temperature is 1508 degrees and pressure is 15 lb/cm^2. What is the volume when the temperature is 2508 degrees and the pressure is 20 lb/cm^2?

    asked by ciara
  26. math

    Cecily is swinging. The swing goes back and forth twice every five seconds. How many seconds does it take her to go back and forth one hundred times? About how many minutes is that? Please help me.

    asked by Anonymous
  27. math

    the hawks won 7 games lost 6 games and tied 2 games what percent of all the games did they win.

    asked by rachel
  28. math 5th

    The new playground at Middledale school will be enclosed by a fence. The playground will be rectangular and will have an area of 225 sq. yd. The number of yards on each side will be a whole number. What is the least amount of fencing that could be required

    asked by sean
  29. Trignometry

    A car is moving at a rate of 55 mph and the diameter of its wheels is 2 feet. A) Find the number of revolutions per minute the wheels are rotating. B) Find the angular speed of the wheels in radians per minutes.

    asked by David
  30. college Mathematics

    I have been trying to figure this out for day's please help if you can. A survey of 59 customers was taken at a book store regarding the type of novels purchased. The survey found 34 customers purchased mysteries, 27 purchased science fiction, 20 purchased

    asked by Carol
  31. Math

    A truck traveling at an average rate of 45 miles per hour leaves a rest stop. Fifteen minutes later a car traveling at an average rate of 60 miles per hour leaves the same rest stop traveling the same route. How long will it take for the car to catch up

    asked by nick
  32. Math

    The sides of the triangle at right are formed by the graphs of 3x+ 2y = 1, y = x − 2, and −4x+ 9y = 22. Is the triangle isosceles? How do you know?

    asked by Mark
  33. chemistry

    enthalpy change^H is +23kJ mol-1 of phosphine (PH3) for the reaction 2P(s)red+3H2(g)---->2PH3(g) a) Calc. entropy change for this reaction. Explain how this information allows you to determine the spontaneity or non-spontaneity of this reaction at any temp

    asked by harry
  34. CIS 115

    Design a solution that requests and receives student names and an exam score for each. The program should continue to accept names and scores until the user inputs a student whose name is “alldone”. ***After the inputs are complete determine which

    asked by Anonymous
  35. Chemistry Help!

    If 100 grams of KClO3 are heated to form KCl and O2 according to the equation KClO3 ¨ KCl + O2 (Hint: You need to balance the equation) a. How many moles of KClO3 reacted? b. How many moles of KCl are formed? c. How many grams of KCl are formed? d. how

    asked by Allison
  36. Logarithms

    How do you expand ln15x? thanks :)

    asked by Allyson
  37. math

    how can you use a pattern to find 2,100 divided by 3? what is the quotient

    asked by kisha
  38. Chemistry

    Acetic acid ionizes in water as follows: CH3COOH + H2O --> CH3COO– + H3O+

    asked by Cassie


    asked by ravi butthole
  40. algebra

    translate th phase into an alegbraic expression 13 more than twice Gregs savings use the variable g to represent greg saving

    asked by Anonymous
  41. math

    how many $5 bills are in $2000

    asked by kisha
  42. math

    Put the following products in order from least to greatest without multiplying 5x 3/4 4 1/4x 3/4 1/2x 3/4 3/3x 3/4

    asked by mom
  43. Chemistry

    How much heat is necessary to change a 52.0 g sample of water at 33.0 C into steam at 110.0 C?

    asked by E
  44. Lang. Arts

    Read the following stage directions from the end of Act 2 of The Diary of Anne Frank. [For a second ANNE stands looking up at PETER, longing for him to kiss her. As he makes no move she turns away. Then suddenly PETER grabs her awkwardly in his arms,

    asked by Cassie
  45. geometry

    The angle of depression from the top of a lighthouse to a boat in the water is 30°. If the lighthouse is 89 feet tall how far is the boat from the lighthouse to the nearest foot? Answers available in ... 10Take this time to do your best on this question.

    asked by erika
  46. Math Please Help

    How are exponential growth and decay present in the real world? Give at least 2 examples for exponential growth and 2 examples of exponential decay.

    asked by SAMHAM

    A rifle is aimed horizontally at a target 31 m away. The bullet hits the target 1.3 cm below the aiming point. Neglect air resistance. (a) What is the bullet's time of flight? s (b) What is its muzzle velocity? m/s (in the bullet's initial horizontal

    asked by Rachel
  48. Math Question

    The Silk Road stretched ____ miles from western China to Southwest Asia.

    asked by Bell
  49. Math

    Actual lengths of pregnancy terms are nearly normally distributed about a mean pregnancy length (of about 38-39 weeks) with a standard deviation of 15 days: about what percentage of births would be expected to occur within 15 days of the mean pregnancy

    asked by Daniel
  50. Physics

    A wire of cross-sectional area 5.00x10^-6 m^2 has a resistance of 1.75 ohm. what is the resistance of a wire of the same material and length as the first wire, but with a cross-sectional area of 8.75x10^-6 m^2? I really want to understand what to do here,

    asked by Jamie
  51. chemistry

    Suppose you have a solution containing both an iron ii salt and an iron iii salt. how would you proceed to identify both Fe 2+ and Fe 3+ in this solution?

    asked by Ash
  52. chemistry

    A granite sample has a density of 2.76 g/cm3. What is the mass of a granite block that measures 3.25 cm x 5.50 cm x 7.00 cm?

    asked by farrah
  53. Trigonometry

    A car with a wheel of radius 14 inches is moving with a speed of 55 mph. Find the angular speed of the automobile to the nearest mile per hour. I got 55/14

    asked by Joe Smith
  54. Physics

    Proper design of automobile braking systems must account for heat buildup under heaving braking. Calculate the thermal energy dissipated from brakes in a 1360-kg car that descends a 13.5° hill. The car begins braking when its speed is 88 km/h and slows

    asked by Thomas
  55. math

    Select the expression that is equivalent to -4(x-3) a) -4x-3 b) -4x+3 c) -4x-12 d) -4x+12

    asked by monet
  56. chemistry

    The hydrogen gas collected also contains some water vapor. The pressure of this mixture of gases equals the room pressure. find the partial pressure of H2 gas.

    asked by Anonymous
  57. math

    Of 47 plays attributed to a playwright 17 are comedies, 18 are tragedies, 12 are histories. If one play is selected random find the odds against selecting a tragedy.

    asked by Carol
  58. Physics

    A 0,1kg bullet is fired horizontally towards blcok A and B, which are hanging from cords. The bullet passes through block A of mass 2kg and becomes embedded in block B of mass 6.4kg. The bullet thus causes A and B to start moving with velocities of 6m,s-

    asked by Kerry
  59. Math

    Hannah's teacher brought in a bucket containing 72 blocks. The blocks are red, yellow or blue. Hannah wants to figure out the number of blue blocks without emptying the bucket. Hannah chooses a block from the bucket records its color and then replaces it.

    asked by Leo
  60. Chemistry

    Complete and Balance the following equation using the half-reaction method; (MnO4^-) + (CH3OH) --> (Mn^2+) + (HCO2H)

    asked by Kelli
  61. physic

    a negative charge of -0.55 uc an unknown charge 0.300 m diectly below it. what are the magnitude an direction of the force that unknown charge exerts on the -0.550 uc charge ?

    asked by yanis
  62. World history; Check:P

    Medieval Society Assignment What were three main causes of the need to reform the Church? The three main causes were: • Many village priests married and had families. Such marriages were against Church rulings. • Bishops sold positions in the Church, a

    asked by Unknown
  63. •Chemistry

    How many mole are present in 2.45x10^23 molecules of CH4? ( CH4= 16.05)

    asked by Mike
  64. work

    1. Alcoa stock traded at $70 per share. Pete and his partner Al decided to sell 100 shares for a total of $7,000. The stock was purchased for $65 per share (100 x $65 = $6,500) for a gain of $500. Pete invested twice as much as Al in the purchasing of the

    asked by Anonymous
  65. math

    jenna lives 4 3/10 miles from school. She estimates that she travels 4x2x5 or 40 miles each week. Is her estimate an overestimate or an underestimate? explain.

    asked by Judy
  66. Math Help Please!!!!

    Which type of angle do construction workers use when building to make sure that the walls and floors of a building are perpendicular?

    asked by Bell
  67. Math

    Madam Lee had a bale of cloth measuring 150 m in her shop. A customer asked her to sew 10 cushion covers, each requiring 3 m of cloth. How much cloth had she left?

    asked by Nurafeqah
  68. maths

    using the substitution p=1/x, q=1/y, solve simultaneous equations 1/x-5/y=y 2/x+1/y=s please could show all working

    asked by favs
  69. 7th grade social studies

    I am doing a research on diamonds and need help. I am having trouble finding a source that answers my questions besides Wikipedia. My teachers will not let us use Wikipedia. Can you please provide links to these questions? 1. Where is the natural resource

    asked by Delilah
  70. Chemistry

    If the hydrogen ion concentration of a solution if 10^–10M, is the solution acidic, alkaline, or neutral? A.acidic B.alkaline C.neutral D.The answer cannot be determined I think it is B..thanks

    asked by Cassie
  71. Math

    Runner A crosses the starting line of a marathon and runs at an average pace of 5.6 miles per hour. Half an hour later, Runner B crosses the starting line and runs at an average rate of 6.4 miles per hour. If the length of the marathon is 26.2 miles, which

    asked by nick
  72. Science

    How many silver atoms are contained in a 100 gram pure silver bar?

    asked by Madelynn
  73. physics

    A block of mass m1 = 3.2 kg rests on a frictionless horizontal surface. A second block of mass m2 = 1.9 kg hangs from an ideal cord of negligible mass that runs over an ideal pulley and then is connected to the first block. The blocks are released from

    asked by tsubasa
  74. Chemistry

    Complete and Balance the following equation using the half-reaction method; (MnO4^-) + (CH3OH) --> (Mn^2+) + (HCO2H)

    asked by Kelli
  75. Maths

    In a class of 33, 5/11 were many girls?

    asked by Siphosethu
  76. Physics

    A 2.5 kg object is whirled in a vertical circle whose radius is 0.89 m. If the time of one revolution is 0.94 s, the magnitude of the tension in the string (assuming uniform speed) when it is at the top is

    asked by Eve
  77. Physics

    The period of the earth around the sun is 1 year and its distance is 150 million km from the sun. An asteroid in a circular orbit around the sun is at a distance 475 million km from the sun. What is the period of the asteroid’s orbit? Answer in units of

    asked by Chelsea
  78. Chemistry

    1.What mass of water could be absorbed from moist air by a 1000.0g sample of a zeolite with the empirical formula Na2Al2Si3O10*2H2O, assuming that the zeolite had been dehydrated first? 2. What mass of Ca2+ could be removed from hard water by a 2000.0g

    asked by Sheridan
  79. Physics

    A man carries a 10 kg sack of groceries in his arms with a force of 50 N as he walks forward a distance of 10 m. How much work has he done?

    asked by Anon
  80. chemistry

    list the following substances in order of increasing molar entropy at 25'c. H2O(l), H2O(g), H2O(s), C(s), Ar (g) Explain your reasoning

    asked by harry
  81. Physics

    A string requires a 191.0 N force in order to break. A 1.75 kg mass is tied to this string and whirled in a vertical circle with a radius of 1.92 m. The maximum speed that this mass can be whirled without breaking the string is

    asked by Eve
  82. Math

    In a World Series, two teams play each other in at least four and at most seven games. The first team to win four games is the winner of the World Series. Assuming that both teams are equally matched, what is the probability that a World Series will be one

    asked by Jimmy-Please HELP
  83. math

    100 raffle tickets are sold for 3 dollars each. One prize of 200 is to be rewarded. Raul purchased 1 ticket. what is his expected value and what his his fair prize

    asked by Carol
  84. chemistry

    Which of the following os a true statement about the periodic table? A. periods form horizonal rows;groups form vertical columns B. groups form horizontal rows;periods form vertical columns C. catagories form horizontal rows;gases form vertical columns D.

    asked by jill
  85. Math

    Find the minimum and maximum possible areas of a rectangle measuring 6 km by 11 km.

    asked by nick
  86. Calculus

    Solve for x in the equation ln(16-12x)-2lnx)= ln4

    asked by Emily
  87. programming

    Design an algorithm that accepts two values, the hourly rate and the number of hours worked by an employee. If the number of hours exceeds 40, then the excess hours should be paid at an overtime rate of twice the hourly rate. Calculate wages (including

    asked by Anonymous
  88. Calculus

    Find the maximum height of a ball thrown upward from the top of a 640 ft tall building with an initial velocity of 128 ft/s

    asked by Millie
  89. 5th grade math

    adam read a 360 page book in 3 days. he read twice as many pages on the middle day as he did on the first day or last day. How many pages did he read on the LAST day.

    asked by reece
  90. physics

    A pumpkin with a mass of 3.0 kg is launched from a catapult at an initial height of 3.5 m off the ground, with an initial speed of 16.2 m/s. What height is the pumpkin at when the speed is half its initial speed?

    asked by Anonymous
  91. math

    Adam drew two same size rectangles and divided them into equal parts. He shaded 1/3 of one rectangle and 1/4 of other rectangle. What is the least number of parts into which both rectangles could be divided?

    asked by Anonymous
  92. Math Question

    Which of these was received by Chinese merchants when trading with the West?

    asked by Bell
  93. math

    A rope is used to hold a tree upright. it is attached to the ground at a distance of 95 feet from the tree and forms an angle of 47 degree with the ground. How long is the rope to the nearest foot?

    asked by natalie
  94. math

    Cecily is swinging. The swing goes back and forth twice every five seconds. How many seconds does it take her to go back and forth one hundred times?

    asked by Anonymous
  95. Science

    An airplane is flying 200mph at 50 degrees north of east. Wind velocity is 50mph due south. What is the velocity of the airplane?

    asked by Jonas
  96. 7 Science (weather)

    1. the energy for the wateer cycle come from the sun true 2. the temperature at which water vapor condenses to liquid form is called dew point 3. clouds that cover a large area stratus 4. what kind of weather would an anitcyclone likely bring not-- cool

    asked by unknown.gonegirl
  97. college trigonometry

    verify identity: (tanx-cotx)/sinxcosx=sec^2x csc^2x

    asked by ken
  98. Math

    a bag contains 5 blue, 4 red, 9 white, and 6 green marbles. I f a marble is drawn at random and replaced 100 times, how many times would you expect to draw a green marble?

    asked by Mia,Thank you
  99. physics

    if a proton and an electron are released when they 2.0 x 10^-10 m apart, find the initial acceleration of each of them

    asked by yanis
  100. chemistry

    the standard free energies of formation of SO2(g) and SO3(g) are -300.4 and -370.4kJ mol-1 respectively. Calculate the value of the equilibrium constant at 25'C for the reaction 2SO2(g)+O2(g)==>2SO3(g)

    asked by harry
  101. physics

    what is the frequency of a citizen's band (CB) radio which has a wavelength of 11.5 meters ?

    asked by Ayawari Promise +2347068654055
  102. math

    A game consists of tossing a coin and rolling an ordinary die. If the player tosses a head and rolls an even number, the player wins $3. Otherwise, the player loses $1. What is the expected value of this game? Select one: a. $6 b. $0 c. $3 d. $1

    asked by Tina
  103. physics

    A spacecraft is on a journey to the moon. At what point, as measured from the center of the earth, does the gravitational force exerted on the spacecraft by the earth balance that exerted by the moon? This point lies on a line between the centers of the

    asked by Dee
  104. Math Word Problem

    four consecutive multiples of 13 add up to 286. what is the largest number?

    asked by Anonymous
  105. physics, only smart people answer

    Two blocks are connected by a lightweight, flexible cord that passes over a frictionless pulley. If m1 = 3.4 kg and m2 = 9.0 kg, and block 2 is initially at rest 140 cm above the floor, how long does it take block 2 to reach the floor?

    asked by tsubasa
  106. math

    Explain this pattern. 322 32.2 3.22 0.322

    asked by Anonymous
  107. math

    Suppose that you deposit $1735.50 in a savings account that pays 9.25% annual interest with interest credited to the account at the end of each year. Assuming no withdrawals are made, find the balance in the account after 4 years

    asked by Jess
  108. Chem

    Consider 1.40 mol of carbon monoxide and 3.20 mol of chlorine sealed in a 8.00 L container at 476 oC. The equilibrium constant, Kc, is 2.50 (in M-1) for CO(g) + Cl2(g) ↔ COCl2(g) Calculate the equilibrium molar concentration of CO. So I tried this

    asked by Anonymous
  109. math

    The temperature on one day in January for Phoenix, AZ, is 59 degrees Fahrenheit. On the same day in Barrow, AK, the temperature is -16 degrees Fahrenheit. What is the difference between these two temperatures? a) 43 degrees Fahrenheit b) 75 degrees

    asked by monet
  110. chemistry

    one mole of an ideal momoatomic gas at s.t.p undergoes isochoric heating at 25 degrees C. Calculate, the pressure, the heat, the workdone, du, dH.

    asked by Anonymous
  111. Maths

    They were 336 people at a concert.if 2/3 were childre,how many chairs were needed for the adults?

    asked by Siphosethu
  112. Math

    A 12% solution and a 24% solution are to be mixed to create 80 mL of a 16% solution. How much of each should be used?

    asked by Alyonka
  113. Algebra

    On a map, two cities are 3 3/8 in. apart. If 3/8 in. on the map represents 45 mi, find the number of miles between the two cities. mi

    asked by LaShawn
  114. Grammar- (Ms. Sue)

    For each of the following sentences, write the elliptical clause. Next to it, write out the full adverb clause, adding the understood words. 1). The Dead Sea in Israel has a lower elevation than Death Valley in California. 2). I enjoy Jerusalem more than

    asked by Victoria
  115. Calculus

    Solve for x in the equation ln(16-12x)-2lnx = ln4

    asked by Emily
  116. Math problem

    -A clock is divided equally into 60 units. Each unit forms an angle of 6^0.The hour hand moves 1 of these units for every 12 units that the minute hand moves. it move 2 of these units for every 24 units for the minute hand,ete.At 6 o'clock the hour hand

    asked by Mike
  117. Math

    A man carries a 10 kg sack of groceries in his arms with a force of 50 N as he walks forward a distance of 10 m. How much work has he done?

    asked by Anon
  118. physics

    (a) A vertically polarized photon goes through two polarizing filters, the first of which is vertically aligned and the second at degrees. What is the probability that the photon is transmitted through both filters? (b) Now, you are allowed to place a

    asked by unknown
  119. math

    Which units would you use to measure the area of a rectangle with L=1m and W=34 cm? Explain

    asked by Jade
  120. Math

    A 12% solution and a 24% solution are to be mixed to create 80 mL of a 16% solution. How much of each should be used? Is the correct answer 53 1/3 L of the 12% solution and 26 2.3 of the 24% solution?

    asked by Alyonka
  121. math

    Deandre rented a truck for one day. There was a base fee of 16.99 , and there was an additional charge of 78 cents for each mile driven. Deandre had to pay 160.51 when he returned the truck. For how many miles did he drive the truck?

    asked by janae
  122. math

    13 cents for A 12 cents for B. total protein greater than twelve grams. Total fat less than eight grams. Total grams less than thirty five grams. .5 grams protein and .3 grams fat for A. .6 grams protein and .2 grams fat for B. what is optimal cost

    asked by Jerome
  123. Chemistry

    Is the Conversion of NO2 to HNO3 endo- or exothemic? Calculate the enthalpy and free energy change for the reaction 4NO2 + o2 + 2H2O-----> 4HNO3 in the aqueous phase.

    asked by Maha
  124. math

    the baseball team and the softball team had fundraisers to but supplies for their trip to the championship game. The baseball team spent $135 buying six cases of juice and one case of bottled water. The softball team spent $110 buying four cases of juice

    asked by answerman
  125. music

    While Americans are largely unfamiliar with the folk tunes of their heritage, why do you think the people of Japan continue to perform and enjoy thiers even today?

    asked by justastudent
  126. math

    A ball dropped 16 feet. The height of each bounce of the ball is 8 feet, 4 feet, 2 feet and so on. How high will the sixth bounce be show all of your work

    asked by lee
  127. Math

    If a train traveled at 480 kilometers per hour for 1/4 hour,what distance would the train travel?

    asked by Danny
  128. Math Question

    Why did most merchants not travel the entire distance from China to the Middle East to trade their goods?

    asked by Bell
  129. Chemistry

    Is the Conversion of NO2 to HNO3 endo- or exothemic? Calculate the enthalpy and free energy change for the reaction 4NO2 + o2 + 2H2O-----> 4HNO3 in the aqueous phase.

    asked by Maha
  130. accounting

    In its first year of operations Tower Ltd purchased and paid for widgets costing $50,000. During that year Tower Ltd sold 60 per cent of the widgets. The widgets on hand at the end of the year cost $20,000. The sales were on credit terms. Tower Ltd

    asked by Anonymous
  131. Physics

    The orbit of a Moon about its planet is approximately circular, with a mean radius of 2.24 × 10 8 m. It takes 35.5 days for the Moon to complete one revolution about the planet. Find the mean orbital speed of the Moon. Answer in units of m/s Find the

    asked by Chelsea
  132. wayne

    A crate of potatoes of mass 19.0 kg is on a ramp with angle of incline 30° to the horizontal. The coefficients of friction are ìs = 0.68 and ìk = 0.36. Find the frictional force (magnitude and direction) on the crate if the crate is sliding up the ramp

    asked by tsubasa
  133. British Literature

    Identify the Speaker of the passage from twelfth Night by writing the corresponding letter on the blank line.. a. olivia b. orsino c. sebastian d. viola e. feste 18. I see you what you are: you are too proud. But, if you were the devil, you are fair. 19. I

    asked by dani g
  134. calculus

    evaluate the indefinite integral of (5dx)/(xln(7x))

    asked by ashley
  135. math

    Select the expression that represents the statement "3 more than a number"

    asked by monet
  136. Math Word Problem

    five consecutive multiples of 5 add up to 425. What is the largest number?

    asked by Anonymous
  137. math

    how much is 1/4 of 8 pies

    asked by ray
  138. math 5th

    Cristina has 16 square feet of material to make a rectangular quilt. She wants the quilt to have the least possible(minimum) perimeter. If Cristina uses all 16 square feet, what dimensions should she use for the quilt?

    asked by sean
  139. calculus

    Evaluate the indefinite integral of (5dx)/(xln(6x))

    asked by ashley
  140. Physics

    During an action potential, Na^+ ions move into the cell at a rate of about 3x10^-7 mol/m^2*s. How much power must be produced by the "active Na^+ pumping" system to produce this flow against a +30-mV potential difference? Assume that the axon is 40cm long

    asked by John
  141. PHYSICS

    Two parallel plate capacitors are identical, except that one of them is empty and the other contains a material with a dielectric constant of 4.2 in the space between the plates. The empty capacitor is connected between the terminals of an ac generator

    asked by HELP !!!!
  142. Math

    I am thinking of two number that add to twenty one .one number is 3 more than the other.what are my numbers?

    asked by Vincenzo
  143. math help please

    the human body is 65% oxygen 18% carbon 10% hygrogen the rest is other elements what % is composed of ther elements

    asked by rachel
  144. Physics

    A spacecraft of mass 2000kg, moves at a constant speed of 7800m.s- in space. the main engine switched on for 10s during which time the exhaust gases travels at 10 000m.s-. As a result of this, the craft travels at 8000m.s- after 10s. Calculate the mass of

    asked by Kerry
  145. Math problem

    The area of a triangle is equal to 1/2 the hight times the base. A triangle has a height of 10 and a base of 20. If the height of the triangle is increased by 10% and the base is decreased by 10%, then the area of the new triangle formed___________. ?

    asked by Alex
  146. math 4th grade

    Find the missing number 2/5 = /20 could you explain the steps I take to find the answer

    asked by Lourane
  147. math please help

    the human body is 65% oxygen 18% carbon 10% hygrogen the rest is other elements what % is composed of other elements?

    asked by josiah
  148. Easy Math

    I am confused on how to do this ? ! Jeff is a salesperson in a retail store and earns $52 per week plus 13% of his weekly sales. If Jeff made $312 one week, what were his sales that week?

    asked by Jessica
  149. trig

    ABC- with angles AB, and C and sides AB,BC, and AC, angle B is right 90degree angle, if sin of angle A is 0.5, side BC 8in., what is length of AC

    asked by maranade
  150. physics

    The four tires of an automobile are inflated to a gauge pressure of 1.7 × 10 5 Pa. Each tire has an area of 0.023 m2 in contact with the ground. Find the weight of the automobile. Answer in units of N

    asked by Joey
  151. physics !!!!!!!!!!!!!

    The waterfall "Angel Falls" in Venezuela is the world's tallest at h=979 m. Assume that the water's velocity on the top of the falls and on the bottom of the falls (after it hits the ground and begins to flow away) is equal, and that no total energy is

    asked by please help me out!!! please
  152. software

    The questions ask List four major functions of an OS. My answer: Function 1: Provide a user interface Function 2: Manage files Function 3: Manage hardware Function 4: Manage applications Is my answer correct?

    asked by DJ
  153. math-correction

    Petrus shared his birthday cake with 5 of his friends.He gave Sandy 1/8,Mary and Paul1/10 each.He gave Jack 1/5 and Sandra 3/20.What fraction of the cake had he left.

    asked by iris
  154. math

    A sqaure and a triangle have equal areas.if a side of the square is 10 inches and the base of the triangle is 10,what is the height of triangle draw a diagram to solve the problem

    asked by kaiya
  155. Lang. Arts

    Which sentence in the stage directions shows correct punctuation of an introductory structure? A.As he makes no move she turns away. B.As she is about to open her bedroom door, she catches sight of Mrs. Van Daan. C.As she regains her poise she goes to her

    asked by Cassie
  156. Math Word problem

    Ben and Ken live in homes that are 10 miles apart. Both left their respective home at 10:00 am to visit the other person. If Joya travels at an average speed of 35mph and Tanya 45 mph, at what time will they cross each other?

    asked by Anonymous
  157. Math Word problem

    Ben and Ken live in homes that are 10 miles apart. Both left their respective home at 10:00 am to visit the other person. If Ben travels at an average speed of 35mph and Ken 45 mph, at what time will they cross each other?

    asked by Anonymous
  158. Math

    Name the vertices of a square whose angles are f,g,a,l

    asked by Ron
  159. physics

    A mass m = 88.0 kg slides on a frictionless track that has a drop, followed by a loop-the-loop with radius R = 15.8 m and finally a flat straight section at the same height as the center of the loop (15.8 m off the ground). Since the mass would not make it

    asked by peter
  160. Chemistry

    Determine the theoretical field of aspirin for a student who started the experiment with 2.489 g of salicylic acid. Show your work.

    asked by Margaret
  161. Physics

    A coordinate system (in meters) is constructed on the surface of a pool table, and three objects are placed on the coordinate system as follows: a 0.8 kg object at the origin, a 2.8 kg object at (0 m,1.7 m), and a 4.4 kg object at (3.8 m,0 m). Find the

    asked by Chelsea
  162. Math

    Liam mailed 8 invitations to his birthday party. If one invitation went to each of his friends, how many friends did Liam invite to his party?

    asked by Amari

    Whats the pH of the solution which can be prepared by mixing same volumes of 0.5% NH4Cl and 0.25% KOH ? (K=1.8 * 10^-5) M(NH4Cl) 53.5 g/mol M(KOH)=56g/mol

    asked by Anonymous

    How many grams of NaNO2 should be dissolved in 500cm3 solution of nitrous acid (HNO2) with concentration of 0.03mol/dm3 if we wish the solution to show a pH of 3.2 Ka = 4.5 * 10^-4 M(NaNO2) = 69 g/mol

    asked by Anonymous
  165. Square inches

    Cardboard measures by 28 inches by 22 inches made into 100 equal squares

    asked by Regina
  166. Math 5th

    There are 28 students in zacks forth are absent how many students are present? Answer choises a.16 b.7 c.9 d.21

    asked by Skylar
  167. maths

    Three circles, each with a radius of 10, are mutually tangent to each other. The area enclosed by the three circles can be written as ab√−cπ, where a, b and c are positive integers, and b is not divisible by a square of a prime. What is the value of

    asked by chirag
  168. Math Word problem

    a pile of fifty $1, $5 and $10 bills is worth $237. The number of $5 bills is twice as many as $10 bills.How many $1 bills in the pile?

    asked by Anonymous

    A plane travels from California to New York. The plane travels about 5000 km in 5 hours. What is the plane's velocity? (Give directions as North, South, East, or West.)

    asked by NEED HELP
  170. math

    show 3 ways to estimate 3/5 x 9 1/2 identify each method you use? I am lost!!!!

    asked by Jared
  171. Grammar

    For each of the following sentences, write the elliptical clause. Next to it, write out the full adverb clause, adding the understood words. 1). The Dead Sea in Israel has a lower elevation than Death Valley in California. 2). I enjoy Jerusalem more than

    asked by Victoria
  172. physical sciences

    A child throws a coin vertically downwards from a window of high building with an initial velocity of 15 m/s.Ignore the effect of air friction. Calculate vhow lonfg the coin falls

    asked by tebogo
  173. Math Word problem

    Sam drove his bike at 58 mph for the same number of hours that Raj drove his bike at 51 mph. If sam ended up driving 62 miles more than Raj, how many hours did each drive?

    asked by Anonymous
  174. Math

    Sheet is 28 inches by 22 inches I have to make 100 equal squares how big should the inches be to fit on this sheet?

    asked by Regina
  175. physics

    list and explain in full details 5 locking devices

    asked by favs
  176. geometry!!!!!!

    ABC is an isosceles triangle with AB = BC. The circumcircle of ABC has radius 8. Given further that AC is a diameter of the circumcircle, what is the area of triangle ABC?

    asked by please help me out!!! please
  177. math

    evalate the expression when a=2 and y=-4 -a+7y

    asked by woolridge
  178. Social Studies

    What was a key factor contributing to the Whig victory in the presidential election of 1840? A.the endorsement of the Whigs by former president Andrew Jackson B.the economic depression following the Panic of 1837 C.a corruption scandal involving President

    asked by Cassie
  179. Physics

    What is the electrostatic force between two ballons, each having 0.000005 C of charge, when they are 0.5 m apart?

    asked by Rebecca
  180. pre-cal

    consider y=-2+5cos(20x-5pie) the period is? the frequency is? the vertical shift is? the horizontal shift is?

    asked by Argelia
  181. Statistics

    Find the probability that for a random sample of 4 states the sample mean x is between 475 and 525

    asked by Juan
  182. maths

    ABCD is a convex cyclic quadrilateral such that AB=AD and ∠BAD=90∘. E is the foot of the perpendicular from A to BC, and F is the foot of the perpendicular from A to DC. If AE+AF=16, what is the area of ABCD?

    asked by harsh
  183. SCIENCE Biology (urgent)

    answer it with 2 paragraphs.. 1.How does chlamydia infect the human body? 2.What are the complications that can result from chlamydia infection? 3.What are the benefits of the CPAF inhibitor? 4.In what instances can control of endocycling be beneficial?

    asked by nimfa18
  184. maths

    two boys of my class like me but they both are really nice i want them to be my friend so what should i do?

    asked by vineeta
  185. math

    HI im Homework mahde.Im having trouble with my homework. Do you or anyone know what a interval is? In when your like using Graph or of course math terms. Please anwser quickly! Thankyou.

    asked by Homework Mahde
  186. PLEASE HELP 5th grade math

    There are 28 students in zacks forth are absent how many students are present? Answer choises a.16 b.7 c.9 d.21

    asked by Skylar
  187. math

    Ø What is the effect on the area of a triangle if the base is doubled and the height is cut in half? What happens to the area, if the base is doubled and the height remains the same?

    asked by Renee mckinnon
  188. University Physics

    Consider this traffic problem that is played out in many communities everyday! A car is cruising down the highway of life @ 25m/s in a 3-m long compact car when he comes upon an intersection with a stop sign. At the instant that he is 45 m away from the

    asked by Amy
  189. Math Word problem

    Ken and Ben were both saving money to buy a TV. Ken was $255 short of the amount needed and Ben was $315 short of the amount needed to buy the TV. If they combined their money, they had eaxctly enough to buy one TV. how much did the TV cost?

    asked by Anonymous
  190. algebra

    What is the base of a parallelogram if the height is 18.6 inches and the area is 279 square inches

    asked by kylie
  191. Algebra

    Solve for x. x − 8y + 8 = 0

    asked by LaShawn
  192. ALGEBRA

    9x^2y 12xy^3

    asked by LaShawn
  193. maths

    A semicircle has AB as the endpoints of its diameter, and AB=400. Points C and D are on the circumference of the semicircle such that AD=BC=100. What is the length of DC?

    asked by harsh
  194. college chemistry

    If i have a highly polar mobile phase, what will happen to the non-polar or less polar compounds during chromatography? will they move less up the TLC plate or actually even more because the mobile phase itself is so polar.

    asked by Anonymous
  195. math

    Calculate the sum of 1/4 and 1/3.

    asked by monet
  196. British Literature

    test 3, question 28 Every character in Shakespeare's plays has a function important to the plot. Discuss the characterization of Feste using dialogue, actions and what other characters say about him. In you answer, include Feste's function in the play. For

    asked by dani g
  197. Physical Science

    How many CH4 molecules are contained in a 50gram sample of CH4 gas?

    asked by Claire
  198. Math

    What is 2.49 divided by 89?(BTW im not cheating im just having trouble checking my answers

    asked by Becca
  199. Abnormal Psychology

    Another term for for conceptual framework within which a psychologist works is a? a. Theoretical Orientation b. Theoretical Perspective c. Paradigm d. All of the above. What I think is Paradigm, but I am not entirely sure.

    asked by Amy
  200. physics

    (part 1) An athlete whirls an 8.1 kg hammer tied to the end of a 1.4 m chain in a horizontal circle. The hammer moves at the rate of 0.597 rev/s. What is the centripetal acceleration of the hammer? Assume his arm length is included in the length given for

    asked by madison
  201. chemistry

    Draw and name the different structural forms of L-fructose that would exist in aqueous solutions

    asked by umuc
  202. math

    The value of a house decreased from $108,000 to $82,000. Determine the percent decrease for the value of the house. a) =74% b) =68% c) =32% d) =24%

    asked by monet
  203. English

    Combine each pair of sentences that follow into one sentence by creating a subordinate clause that presents information about a verb. Your subordinate clause will tell when, where, how, why, to what extent, or under what conditions the action of the verb

    asked by Carlos
  204. Humanities

    What are peer reviewed articles/journals?

    asked by Jose
  205. physics

    If something has a longer MHz, does it have a longer wavelength

    asked by jes
  206. chemistry

    For a certain reaction at constant pressure, ∆H = -15kJ, and 22 kJ of expansion work is done on the system. What is ∆U for this process? So I know ∆= ∆U + Work flow If work is being done on the system, shouldn't work flow be positive? So I assumed

    asked by Catelyn
  207. Math-Geometry

    I have to calcualte the volume of a cone. The height is 2.1 ft, and the base is 2 inches. I keep coming up with the answer of 8.792 cu ft. There is 4 choice answers given: 0.061 ft,0.610 ft,6.125 ft and 2.016 ft. I have tried several calculators, none of

    asked by Tammy
  208. math

    on map 1inch=25 measure the distance between two cities on the map and the distance to be 5 1/2 inches.find the number of miles between the cities

    asked by Anonymous
  209. chemistry

    80g of NaCl are dissolved in 400g H2O. if the vapor pressure of the water is 40 mmHg , what is the vapor pressure of NaCl above the solution?

    asked by sheila
  210. Math

    An airplane traveled from Boston to Las Vegas making a stop in St. Louis. The plane traveled 2410 miles altogether, which is 230% of the distance from Boston to St. Louis. Find the distance from Boston to St. Louis to the nearest mile. Please help! Thank

    asked by Kelsey
  211. New-Writing

    This is just a pieces of the article.. Can you check to see if it needs revising.. AP-style Kathy Olsen, marketing and community information coordinator for Michigan Works, said that many people who struggle finding employment lack the necessary soft

    asked by Blaze
  212. Math

    in a class of 40 the ratio of boys to girls is 7 to 3. How many more boys than girls are in the class?

    asked by Hunter
  213. physics

    please help:- Two capactiors of 14microfarror and 6 microfarror are connected in parallel with a series 10microfarror capacitor across a 100v dc supply a)total capactiance b)charge on each capacitor c)voltage across each capacitor d) energy stored in each

    asked by paulr
  214. matt/116

    Will someone please help me find the answer to this question please. How do you write a system of linear equations in two variables? Explain this in words and by using mathematical notation in an equation.

    asked by Sade C
  215. algebra

    what is the input and output rule to 4 33 5 36 11 54 16 69

    asked by Miko
  216. Physics

    A salami sandwich is dropped from the top of a 37 m tall construction crane. What is the speed of the sandwich when it is halfway to the ground? (Use conservation of energy!)

    asked by Nicole
  217. POS-301-0101 arizona government

    Using 750-1,000 words, create a chronological narrative delineating the significance of the documents/events listed below that impacted the evolution of the United States Constitution. In your narrative, discuss each of the documents and/or events listed

    asked by Sylvia
  218. Physics

    What is the electrostatic force between a +1x10^-6C group of charges and another -2x10^-6 C group of charges located 0.3 m apart?

    asked by Rebecca
  219. Algebra

    A trapezoid when its height is h and the lengths of its bases are a and b. What is the area of a trapezoid when h = 6 meters, a = 5 meters, and b = 12 meters? Formula A = 1/2h(a+b) gives the area.

    asked by Jamie
  220. math

    Wyatt and Allyson were asked to solve a percent problem using the numbers 13 and 38. Wyatt found 13% of 38 and Allyson found 38% of 13. Explain why they both got the same answer. Would this work for other numbers as well? Why or why not?

    asked by Betsy
  221. maths

    If x and y satisfy the conditions that 23≤x≤45 and −54≤y≤−32, what is the maximum possible value of x−y?

    asked by chirag
  222. english

    Which of the sentences below is punctuated correctly? The cord winds around the pole, and across the door frame. The wind blew fiercely, and the door slammed shut. The boy slept, and wouldn’t budge when his mom tried to wake him.

    asked by um hello
  223. Statistics

    Find 3 different research questions and the appropriate data one needs to collect for each, including the level(s) of the data to be collected for each question.

    asked by Betty Anne
  224. Physics

    An athlete whirls a 7.17 kg hammer tied to the end of a 1.5 m chain in a horizontal circle. The hammer moves at the rate of 1.76 rev/s. What is the centripetal acceleration of the hammer? Assume his arm length is included in the length given for the chain.

    asked by Chelsea
  225. Laboratory (math, chemistry)

    Most analytic methods are subject to drift. Describe a system which could be used to determine the rate of drift of an analytic method.

    asked by Maranda
  226. SCIENCE


    asked by BOB
  227. Statistics

    1. Each of 4 people is presented with gourmet coffee and ordinary coffee and asked to identify the gourmet coffee. None of the 4 can really tell the difference and are merely guessing. a. What is the probability that exactly 2 of the 4 correctly identify

    asked by Kevin
  228. math

    Write a recursive formula for the sequence: 12,-1,-14,-27...

    asked by Brittney
  229. math

    A fifth grade class collected data about class spending per month on various items. Below are some of the results. A median amount of $6 per month was spent for books and magazine. A median amount of $10 per month was spent for tapes and CDs. A median

    asked by kim
  230. What am I

    I am more than 15. I am less than 50.i am an odd number. I am multiple of5 my digits add up to 7. What am I

    asked by Magdalena
  231. Geometry

    I have two questions... #1 if the radius of the two areas is 12in find the length of a chord of an arc of 45, 35, and 60 degrees. #2 the bases of a trapezoid are 30in and 9in and the nonparallel sides are 10in and 17in. Find the area.

    asked by Stephanie
  232. english

    could someone please proofread my essay and give me any feed back on any changes that needs to be made. I am Sally Goodin, Administrative Assistant of the Human Resources Department at 1701 W. Beebecapps in Mesquite, Texas 34567. Broadworth General

    asked by sally goodin
  233. English Linguistics

    Hey :) I have a quizz on Friday, and on the shetts, it seems to be a mistake... First it stands there: Complements can be expresseed by adjectives or a bare noun. Objects can't. And then at an example sentences cannot be replaced my an adjective or a bare

    asked by Minnie
  234. chemistry

    12.50g of an unknown compound (i=2) are dissolved in 50.00g of water and this solution freezes at –7.5 degrees C. What is the molar mass of this compound?

    asked by Anna
  235. math

    sherie exercises each day. she can walk a mile in 20 minutes, but if she jogs she can do a mile in 10 minutes. she likes to divide her distance by walking and jogging equally. if she exercises for 2 hours how many miles will she have gone.

    asked by Anonymous
  236. Math

    What is 9/25,35/100,and 2/5 in order from greatest to least

    asked by Sarah
  237. World history; HELP

    Please can someone help me? 2.How were Muslim scholars linked to the revival of learning in Europe?

    asked by Unknown
  238. physics!!!!!!!

    In order to measure the length of a long flourescent ceiling lamp, a student makes a very small hole in a piece of paper, holds the paper above the floor, measures the distance between the hole and the floor, and finally measures the length of the light's

    asked by please help me out!!! please
  239. Language Arts Help!!!!!

    When you read a folktale, fantasy, or myth, you most likely will learn something about?

    asked by Bell
  240. inference

    what it means inference

    asked by julie
  241. math

    In a given training week, a swimmer completes 3/7 mile on day one, 1/2 mile on day two, and 2/3 mile on day three. How many total miles does the athlete swim in the given week? a) 6/13 b) 6/42 c) 67/42 d) 7 miles

    asked by monet
  242. math

    simplified expression for 9(x-5)-5(x-2)+6x

    asked by monet
  243. math asap

    If you have5 red marbles and 7blue marbles in a bag what is the probability of getting a red one

    asked by noahc
  244. math

    A clothing store offers a 40% discount on all purchases. How much would a shopper pay (before tax) for an item originally costing $21.00 dollars? a) $33.60 b) $29.40 c) $12.60 d) $8.40

    asked by monet
  245. physics

    In the double-slit experiment, consider the point at the middle of the final (detector) screen which is equidistant from the two slits. Suppose the intensity at that point is when either slit is open. Now for each of the three cases (a) bullet (b) wave (c)

    asked by unknown
  246. school of medine

    the order is 50mg. the pharmacy sends 25mg. how many tablet wil the nurse give?

    asked by Bah1
  247. Algebra

    Find the coordinates of two points on the line with the given equation. Then use the points for find the slope of the line. 1) y= -17 2) 7x-3y= -147 Thank you so much for your help.

    asked by Mia,Thank you
  248. Geometry

    I have two questions... #1 if the radius of the two areas is 12in find the length of a chord of an arc of 45, 35, and 60 degrees. #2 the bases of a trapezoid are 30in and 9in and the nonparallel sides are 10in and 17in. Find the area.

    asked by Stephanie
  249. math


    asked by peaches
  250. Math

    Marshal sleeps 8 hours each day how many hours does Marshal sleep in one week

    asked by JJ
  251. math

    The Kramer family room measures 23ft by 20ft. They are covering the floor with tiles that measure 1 ft on a side and cost $0.73 each? How much will they spend on the tile?

    asked by Carol
  252. Math (Cal)

    I having difficulty integrating this Ingrate (x^3)/sqrt(x^2 - 9) I know that x= 3sec(theta) Sqrt(x^2-9)= 3tan(theta) x^3 = 27Sec^3(theta) Once I put that all together I'm not sure what to do next.

    asked by Angel
  253. statistics

    how could you reword these research hypoteses to null hypoteses? a) smoking during pregnancy increse the risk of a child being born orematurely. b) regular exercise in older adults decreases blood pressure levels.

    asked by layla
  254. algebra

    A function contains the following four points:(4,16),(-9,81),(8,64),(-5,25). What is the range of the function?

    asked by Anonymous
  255. reading

    1. What is the main reason to consider thinning forests? (1 point) to control damage from wildfires to cut down more trees to make room for new trees to create open fields 2. "This area is a beautiful woodland, partly shaded by the overhanging branches of

    asked by tesj
  256. statistics

    Using the definition of recovery provided in W1: Assignment 5, determine how many participants recovered at the end of posttreatment and use a chi-square analysis to compare recovery rates across the three treatments at both posttreatment and follow-up.

    asked by step
  257. maths

    x is a number such that x2+3x+9=0. What is the value of x3?

    asked by chirag
  258. Math

    what is surface are of a prism with a base of 8 meters squared , a perimeter of 3 meters and 6 maters high

    asked by Abrams
  259. Education

    It has been found that most individuals can quickly (over the course of a one- or two-week vacation) develop an in-depth understanding and comfort with people from other cultures as long as there is a desire to reach an understanding True or false? I think

    asked by Lor
  260. physics

    a 5-kilowatt source powers a motor that is lifting a 30 kg mass straight up. how far will the mass move in 6 seconds

    asked by Jared
  261. organic chem

    Which are enatiomers? optically active?identical? diastereomers? A.)...CH3 .....| ...H-C-Cl .....| .....Ch2Cl B.).....H .......| ...H3C-C-CH2CL .......| .......CL C.)...CH3 .......| ....CL-C-H ......| ......CH2CL D.)....CH2CL .........| ......CL-C-H

    asked by meghan
  262. calculus

    If f(x) = 3x^(ln(x)), find f'(10)

    asked by Emily
  263. SCIENCE


    asked by BOB
  264. math

    does any one know how to estimate products? 6/10 x 5 3/4= I have no clue how to do this

    asked by Jared
  265. calculus

    Evaluate the integral of (((ln(x))^7)/x)dx

    asked by ashley
  266. Calculus

    Find the derivative of m(x)=1/(x+1) by using the definition of the derivative.

    asked by Becky
  267. cherokee

    If the regular price is $ 12.00 and the discount is 25% what is the sale price?

    asked by liandria
  268. Science

    What is the percent of fresh water and salt water?

    asked by Jessica
  269. math

    How do you write a system of linear equations in two variables? Explain this in words and by using mathematical notation in an equation.

    asked by taylar
  270. Pre-Calculus

    Determine the equation of a line that passes through (2,2) and is parallel to the line tangent to y=3x^3-2x at (-1,5)?

    asked by Sarah
  271. Trig/precalc

    Cos[x + (7 Pi)/4] + Cos[x - (7 Pi)/4] = 1

    asked by Joe
  272. English

    1. Polly the Parrot had (come, came) with me. come

    asked by Hayden
  273. Algebra

    On a 30 day calendar which begins on a Wednesday and ends on a Thursday, what is the probability in a random drawing that the date would be a Monday?

    asked by Laura
  274. com09

    I am at a loss and need help with my 5 paragraph essay can anyone help me

    asked by crystal
  275. maths

    If a and b are coprime positive integers such that 1/2+1/3+1/4+1/5=a/b, what is the value of a+b?

    asked by chirag
  276. mechanics

    what is viscousity

    asked by juiet
  277. Math

    5 3/4 + 6 2/4 = I need to show my work

    asked by Judy
  278. Math Homework

    A sidewalk has 100 squares. 9 of the squares are cracked. What is the fraction?

    asked by Anonymous
  279. Math Word problems

    an office where 8 secretaries work 8 hours a day 5 days a week decided it needs 336 hours a week of secretarial work. How much more or less will each secretary have to work each week to equally share the 336 hours.

    asked by april
  280. statistics

    A population has a mean =80 and a standard deviation =8. find the mean and standard deviation of a sampling distribution of sample means with sample size=64

    asked by antorio
  281. geography

    why did america grow geographically

    asked by zoee
  282. math

    9- 1 2/8= I got 8 1/4 but the teacher took 2 points off I don't know what I did wrong?

    asked by Jared
  283. kiki

    Suppose you bought supplies for a party. Three rolls of steamers and 15 balloons cost $30. Later, you brought 2 rolls of steamers and 4 balloons for $11. How much did each roll of steamers cost? How much did each balloon cost?

    asked by answerman
  284. math

    If there is a pumpkin pie eating contest, how many pumkin pies will they need if 25 people participate and they eat 7/8 of a pie show your work

    asked by lee
  285. calculus

    Calculate g'(36^(1/2)), where g is the inverse of f(x) = ((x*x)+16x) for x less than or equal to -16

    asked by Emily
  286. math

    Charles mixed pineapple juice and orange juice to make a fruit punch. He made a total of 5 1/2 cups of the mixture and used 2 more cups of orange juice than pineapple juice. How much did he use of each type of juice?

    asked by alyssa
  287. Math

    Proving identities: tell wether or not f(x)=sin x is an identity (Does it simplify to Sin x) ? Please help (sin^3x)(1+cot^2x)

    asked by Oscar
  288. math


    asked by pinky
  289. Calculus

    Find the derivative of y = (ln(2x))/2x

    asked by Emily
  290. calculus

    Let f(x)= 2ln(cosx), find f''(x)

    asked by ashley
  291. calculus

    evaluate the indefinite integral of ((x+4)/(17+8x+x^2))dx

    asked by ashley
  292. math

    what is algebraic fractions and how do you do them?

    asked by dom
  293. What am I

    I am less than 50 , I am more than 30 , I am not a multiple of 2,5 or 10 . My digits add up to 5. What am I ?

    asked by Magdalena
  294. math

    What are two symbolic techniques used to solve linear equations? Which do you feel is better

    asked by taylar
  295. chemistry

    a gas sample heated in a cylinder uses 650kJ of heat. a piston that compresses this gas does 800kJ of work. What is the change in internal energy, ^E of the gas during this process?

    asked by harry
  296. Algebra

    9x − y = 4

    asked by LaShawn
  297. umuc

    Discuss qualitative and quantitative test you would perform to detect or quantify monosaccharides in solutio. Discuss the chemical basis of the tests.

    asked by jam
  298. Math

    What is the rule for 2 to 3 and 9 24.

    asked by Madison
  299. algebra

    (xy)^1/4(x^2y^2)^1/2 over(x^2y)^3/4

    asked by gary
  300. please help with math


    asked by noahc
  301. Physics

    I got 240mph by using a diagram but my lecture said i am wrong

    asked by Jonas
  302. life orientation

    Practices in the contravention of the basic of employment

    asked by mahlatse
  303. Algebra

    Solve the system of inequalities. y 6 So I just want y alone. For the second inequality, I added 3x to both sides and got -2y> 3x+6. Then I divided both sides by -2. I got y> -3/2 - 3 Do I have to switch the inequality symbol or something?

    asked by Casey
  304. maths

    ABCD is a convex cyclic quadrilateral such that AB=AD and ∠BAD=90∘. E is the foot of the perpendicular from A to BC, and F is the foot of the perpendicular from A to DC. If AE+AF=16, what is the area of ABCD?

    asked by harsh
  305. Algebra II

    Dora paid $27,000 as a down payment for her house. If the down payment was 12% of the actual cost of the house, what was the actual cost?

    asked by Anonymous
  306. Math

    How many distinct numbers greater and equal to 100 and smaller than 3000 can be formed using digits 0,1,2,3,4, without repetition of digits?

    asked by Anna
  307. math

    estimating products 6/10 x 5 3/4

    asked by Jared
  308. pre calc

    how do uu find the x int. , y int. , domain range asytote of this equation y=log to the base 10 (2x+3/x-5) pleaseee need to understand before the test tmr!!!!

    asked by kikii
  309. Writing

    What are ways that animals can help each other

    asked by Tim
  310. algebra

    a plane covered a horizontal distance of 15 miles while following a flight path with a slope of .25. how much altitude did it gain?

    asked by lexington
  311. maths

    How many positive integers N are there such that the least common multiple of N and 1000 is 1000?

    asked by chirag
  312. Math

    Sheet is 28 inches by 22 inches I have to make 100 equal squares how big should the inches be?

    asked by Regina
  313. math 4th grade

    now is the correct answer 4

    asked by Lourane
  314. math 4th grade

    my mistake will it be 8

    asked by Lourane
  315. math

    if i have abook of 30 pages and i number each pages, how can i figure the digit number

    asked by joel
  316. Education

    The goal of the culture-general model is to help individuals understand intercultural interactions so that useful contact can be avoided. True or False? I think this is false, is this correct?

    asked by Lor
  317. Chemistry

    Consider titrating an unknown chloride sample with 0.10 +/- 0.01M AgNO3 and the following data: Initial Buret reading-0.19 +/- 0.02mL Final Buret reading- 9.26 +/- 0.03mL Unknown sample mass- 95.0 +/- 0.2mg Find the weight 5 of Cl- in the sample.

    asked by Stephanie
  318. Math

    What is 6 5th's reduced to simplest form?

    asked by Mhya
  319. science

    What forces does a mover need to apply in order to keep the box moving to the right at 1 m/s

    asked by Anonymous
  320. social studies

    how many oceans surrond asia?

    asked by Angel
  321. geometry!!!!!!!!!!

    Three circles, each with a radius of 10, are mutually tangent to each other. The area enclosed by the three circles can be written as ab√−cπ, where a, b and c are positive integers, and b is not divisible by a square of a prime. What is the value of

    asked by please help me out!!! please
  322. PHYSICS

    A few years ago, a movie came out about a soldier, John Carter, who was transported to Mars and could perform amazing feats of strength and jumping due to the lower Martian gravity. The surface gravity of Mars is 0.38 times that of earth. If John could

    asked by please help me out!!! please
  323. Calculus

    Find the derivative of y = (ln(3x))^4

    asked by Emily
  324. math

    3 7/9 x 6 2/5= I have to estimate?

    asked by Judy
  325. umuc

    Draw and name the different structural forms of L-fructose that would exist in aqueous solutions

    asked by jam
  326. math

    6÷2+3•9 _________ √100

    asked by noahc
  327. English

    Today I chose a book called The Story of Davy Crockett Which punctuation mark is needed in sentence? . ? ! none Period

    asked by Hayden
  328. Science

    Half-life is a measure of the rate of decay of an isotope. True False I think it is false?

    asked by Cassie
  329. hurry bedtime


    asked by noahc
  330. 11111111111

    solve 2y-x < 6

    asked by 111111111111
  331. math

    verify identity: tanx=cscx-cotx

    asked by ken
  332. Geometry urgent!

    If the radius of the two areas is 12in find the length of a chord of an arc of 45 degrees, 30 degrees and 60 degrees. I really don't know what to do here! Please help!!

    asked by Stephanie
  333. Math

    what is the area of a rectangle with 6 in inlenth and 7inches wide.

    asked by Angela
  334. math

    peter has a bag of 7 mixed lollies.he allows everyone in his class to choose 3 lollies,but they must not choose more than one of each kind.How many different combinaions of lollies are possible ? Is it 7^3=21 thanks

    asked by karen
  335. math

    if you have 2 dice and you throw them once,what possible combinations of numbers can you get ? Is it 2^6=12 thanks

    asked by karen
  336. calculus

    Let f(x) = 2ln(cosx), find f''(x)

    asked by Emily
  337. calculus

    evaluate the indefinite integral of (9xe^4x^2)dx

    asked by ashley
  338. maths

    what is a simple definition of consumer arithmetic for a 7th grader

    asked by cindy
  339. 6 grade math

    (100-7•2+3)÷10 =

    asked by noahc
  340. pre-cal

    solve for all values in [0,2pie) 2sin^2x-1=0

    asked by Argelia
  341. Quantum Physics

    We have a qubit in the state |ψ>= √3/2 |0>+ 1/2 |1>, which we want to measure in the {Cos θ |0> + Sin θ |1>, Sin θ |0> - Cos θ |1>} basis. In order for the two possible outcomes to be equiprobable, what should be the value of θ in degrees? (Answer

    asked by qwerty
  342. billing

    hippa means

    asked by Anonymous
  343. english

    how do u find a subject for writng instuctions for using a tool

    asked by jj
  344. mechanics

    what is viscousity

    asked by juiet
  345. math 4th grade

    So Alyonka will the correct answer be 10

    asked by Lourane
  346. math

    if i have a book of 30 pages and i want to number each pages what will be the digit for the thirty pages

    asked by joel
  347. dakota valley

    what is areoglhmet

    asked by Madison
  348. math

    5 3/4 + 6 2/4 = 11 10/8 not sure what do from here?

    asked by Judy
  349. asap math

    (25 + 5) • 3 √4 =

    asked by noahc
  350. math 4th grade

    will those same steps work if the problem is x/12=2/6 will the answer be 4/12

    asked by Lourane
  351. math

    5 3/4 + 6 2/4= 11 10/8 then I am not sure what to do from here?

    asked by Jared