Questions Asked on
October 31, 2016

  1. Chemistry

    Consider an ionic compound, MX2, composed of generic metal M and generic, gaseous halogen X. The enthalpy of formation of MX2 is ΔHf° = –799 kJ/mol. The enthalpy of sublimation of M is ΔHsub = 157 kJ/mol. The first and second ionization energies of M

    asked by Joseph
  2. Physics

    A flywheel in the form of a uniformly thick disk of radius 1.48 m, has a mass of 43.6 kg and spins counterclockwise at 303 rpm. Calculate the constant torque required to stop it in 2.50 min.

    asked by Morgan
  3. Physics

    A uniform disk of radius 0.485 m and unknown mass is constrained to rotate about a perpendicular axis through its center. A ring with same mass as the disk\'s is attached around the disk\'s rim. A tangential force of 0.247 N applied at the rim causes an

    asked by Morgan
  4. Physics

    A student holds a bike wheel and starts it spinning with an initial angular speed of 7.0 rotations per second. The wheel is subject to some friction, so it gradually slows down. In the 10-s period following the inital spin, the bike wheel undergoes 60.0

    asked by Morgan
  5. Pre-Calc/ Trig

    Find the sum of the three smallest positive values of theta such that 4(cos^2)(2theta-pi) =3. (Give your answer in radians.) LaTEX: Find the sum of the three smallest positive values of $\theta$ such that $4\cos^2(2\theta-\pi) =3$. (Give your answer in

    asked by Steve Ho
  6. Physics

    A piece of copper ball of mass 30grams at 150 degree celcius is placed in a copper calorimeter of mass 70gams containing 60grams of waterof copper 40degree celcius if the final ofthe mixture is 50degree celcius calculate the specific heat capacity of

    asked by Elizabeth Avan
  7. Physics

    A long, straight wire with a circular cross section of radius R carries a current I. Assume that the current density is not constant across the cross section of the wire, but rather varies as J=αr, where α is a constant. A) By the requirement that J

    asked by Ayaka
  8. Math

    Tickets at a fair cost $0.75 each. You can also buy a roll of 25 tickets for $15.00. What is the cost of each ticket if you buy a roll of tickets.

    asked by Kayla
  9. science, organic chemistry

    Determine the amount of compound remaining in the aqueous phase and organic phase and organic phase if a 5.0g organic compound is dissolved in 100 mL of water and is extracted with three 50-mL portion of ether (kb= 10). Compare this with one 150 ml portion

    asked by Anonymous
  10. Managerial Economics

    A monopoly can produce any level of output it wishes at a constant marginal (and average) cost of $5 per unit. Assume the monopoly sells its goods in two different markets separated by some distance. The demand curve in the first market is given by Q1 = 55

    asked by Samira
  11. Social Studies

    In what way did the Russians tsars fail to follow the example of Western European rules? A. They instituted cultural reforms B. They industrialized C. They held onto absolute power** D. They adopted more modern technologies

    asked by Tylrt
  12. Chemistry

    The combustion of a hydrocarbon X (30 cm3) with 350 cm3 of oxygen at STP resulted in the formation of 440 cm3 of gaseous products. The volume of gases was reduced to 360 cm3 when the excess O2 was removed and then reduced by half when bubbled through NaOH.

    asked by Cavenia
  13. Physics

    2. The average atmospheric pressure at sea level is approximately 101 000 Pa. If the density of air at 0◦C is approximately 1.3 kg , how high does the atmosphere extend?

    asked by Merdreik
  14. maths

    Relation b/w genetics and gp

    asked by maya
  15. intermediate algebra

    1. Two numbers differ by 8. If one-half the larger is added to one-fourth the smaller, the resulting sum is 22.Find the numbers. 2. Ten years ago a man was three times as old as his son. In 12 more years the son is three-fifths as old as his father. How

    asked by sylvia
  16. Chemistry

    how many milliliters of concentrated H2SO4 of density 1.84 containing 95.6% by weight of the acid is required to prepare 5litres of battery acid of density 1.18 containing 25.2% by weight of acid?

    asked by Evarestus
  17. MATHS URGENT PLEASE HELP

    Calculate the lengths of the straight lines joining the following pairs of points, leaving your answers in surd form: (a) A(1,-5), B(6,10); (b) A(4,-3), B(7,6).

    asked by Steven
  18. MATHS URGENT PLEASE HELP

    The mid-point of the straight line joining A(4,-3), B(6,-2) is located at C. (a) Calculate the coordinates of C. (b) Verify your result by calculating the distances AC and BC and showing they are equal.

    asked by Steven
  19. maths

    The total number of people in a survey is T. The number of males in the survey is x and the number of doctors is y. The number of doctors that are male is z. Write algebraic expressions for the following using any of the variables x, y, z and T. a. The

    asked by Parker
  20. maths

    (a) Find the points which divide the line joining A(1,3) and B(-4,-1) internally in the ratios: (i) 1:2 (ii) 1:1 (iii) 3:1 (b) On the same x-y axes plot the point A(1,3) and B(-4,-1) and draw the line joining them. Add the three points which you calculated

    asked by Davon
  21. maths

    Consider the 4 points A(1,5), B(-4,6), C(0,0), D(-12,12). Find the gradients of the lines: (a) AB; (b) CD; (c) BD.

    asked by Mitchel
  22. Maths

    The points A(1,5) and B(9,3) are part of a triangle ΔABC. The triangle has a right angle at A and and sides satisfy AB=2AC. Find a point C such that C lies above the line AB.

    asked by Jared
  23. Maths

    A hexagon has 6 sides, find the sum of the interior angles.

    asked by Anonymous
  24. PHYsics

    A sprinter of mass 70.7 kg runs at a constant speed of 10.5 m/s in a straight line. Find the extra force the sprinter must exert on the ground to round a curve of radius 10.6 m.

    asked by Brint
  25. English

    1. Leaves turn gold in autumn. ------------------------------ Can we use 'gold' in this position? What other words can we use instead?

    asked by rfvv
  26. Maths

    Tell a word that if we say right becomes wrong and wrong becomes right

    asked by Harsh
  27. Math

    If a student scored 54% on a test and wants to increase her score by 20% what will the final percentage score be

    asked by T
  28. Physics

    a truck travels up a hill with a 12% incline. the truck has a constnt speed of 22m/s. what is the horizontal componet of the reucks velocity

    asked by Zach
  29. physics

    The large quadriceps muscle in the upper leg terminates at its lower end in a tendon attached to the upper end of the tibia (see figure (a)). The forces on the lower leg when the leg is extended are modeled as in figure (b), where vector T is the force of

    asked by Bella
  30. English

    1. I think it right that you are helping the poor. 2. I think it right that you help the poor. 3. I think it right that you helped the poor. 4. I think it right that we should help the poor. 5. I think it right that you should help the poor.

    asked by rfvv
  31. pre algebra PLZZZ help

    Why do you have to use estimation to find the number of triangles you need for the string?

    asked by laila
  32. English

    1. I find it difficult to master French. 2. I find it difficult mastering French. 3. The heavy snow made it difficult to walk on the street. 4. The heavy snow made it difficult walking on the street. 5. He believed it difficult to go abroad to study. 6. He

    asked by rfvv
  33. English

    Thank you for your help. One more similar patterns goes. 1. The heavy rain made it difficult for me to open my eyes. 2. The loud music made it difficult for me to focus on my study. 3. The heavy snow made it difficult for me to ride a bike. 1-1. The heavy

    asked by rfvv
  34. math

    if sec theta - tan theta ÷sec theta +tan theta = 1÷4 ,find sin theta

    asked by aara
  35. maths

    Calculate the lengths of the straight lines joining the following pairs of points, leaving your answers in surd form: (a) A(1,-5), B(6,10); (b) A(4,-3), B(7,6).

    asked by Jared
  36. maths

    The mid-point of the straight line joining A(4,-3), B(6,-2) is located at C. (a) Calculate the coordinates of C. (b) Verify your result by calculating the distances AC and BC and showing they are equal.

    asked by Jared
  37. Maths

    (a) Find the points which divide the line joining A(1,3) and B(-4,-1) internally in the ratios: (i) 1:2 (ii) 1:1 (iii) 3:1 (b) On the same x-y axes plot the point A(1,3) and B(-4,-1) and draw the line joining them. Add the three points which you calculated

    asked by steven
  38. maths

    Consider the 4 points A(1,5), B(-4,6), C(0,0), D(-12,12). Find the gradients of the lines: (a) AB; (b) CD; (c) BD.

    asked by Lauren
  39. maths

    The points A(1,5) and B(9,3) are part of a triangle ΔABC. The triangle has a right angle at A and and sides satisfy AB=2AC. Find a point C such that C lies above the line AB.

    asked by Lauren
  40. Physics - circular motion

    You approach a slight bump in the road on the highway in a car. The bump carries you into a circular (convex) vertical arc of radius 39m. A) choosing two different cars ( it is for you to choose 2 particular models, providing the mass of each), at what

    asked by Matt
  41. Physics - Circular motion

    A domesticated pig places a 100g rubber puck on a turntable. The turntable is set at a rate of 78rpm,and the pig knows the coefficient of static friction is 0.37 between the puck and turntable surface. A) How far out from the center of the turntable can

    asked by Matt
  42. English

    Has anyone done the character analysis portfolio? I have Jim as my character...but I cannot find any media, can someone find one?

    asked by Lexy
  43. math

    Suppose you deposit $600 in a savings account. The interest rate is 4% per year. Find the principal balance in the account after six years

    asked by Anonymous
  44. math

    Suppose you deposit $600 in a savings account. The interest rate is 4% per year. Find the principal balance in the account after six years

    asked by isaiah
  45. physics

    If the gravitational force F is given by F=GM1M2÷r×r.derive the dimensions of the universal constant of the gravitational G

    asked by fcvmlt
  46. Chemistry

    For the reaction HCl + NaOH → NaCl + H2O, how many moles of hydrochloric acid are required to produce 281.0 g of water?

    asked by Andrew
  47. plz sir reiny sir steve sir damon help sor bob

    plz help me differentiate arccosh(x/√3) i no that from inverse heyperbolic function cosh=(x±√(x²-1) but i still dont know how to that go about it

    asked by just need help
  48. Chemistry

    Calcium oxide, or lime, is produced by the thermal decomposition of limestone in the reaction CaCO3(s) arrow CaO(s) + CO2(g). What mass of lime can be produced from 2001.2 kg of limestone?

    asked by Andrew
  49. african american history

    What conditions existed that would allow for slaves to be property owners

    asked by susieg
  50. Algebra

    pedro and juan can do a piece of work in 3 3/7 days. if pedro works in 3 days and juan in 4 days, they will finish the work. find the time required by each to do the work.

    asked by Park
  51. african american history

    how did slaves become owners of their properties.... (what did they have to do to become property owners of their property in the mid 19th century)

    asked by susieg
  52. Government

    How do party whips influence legislation?? Please help!!

    asked by Dani
  53. Geometry

    Using the notation Ta,b(x,y)=(x+a, y+b) write a translation function

    asked by Donna
  54. PHYSICS

    A person sits on a frictionless stool that is free to rotate but is initally at rest. The person holding a bicycle wheel (I = 3 kg*m2) that is 8 rev/s in the clockwise direction as viewed from above, and the moment of inertia of the person-sheel-stool

    asked by LESTER
  55. Algebra2

    Complex numbers can be graphed on the xy coordinate plane. TRUE OR FALSE My answer is yes

    asked by Steve
  56. Physics

    a spring hanging from the ceiling. The spring constant present is 200N/m. If a mass of 50 kg is attached, how far does the spring stretch?

    asked by Daddy
  57. Math

    Jun Wei has 12 more 10 cent coins than 20 cent coins. The total value of all his coins is $5.40. Find the total number of coins he has.

    asked by Jason
  58. algebra 2

    Reuben deposited $2000 into an account with a 3.8% annual interest rate, compounded semiannually. Assuming that no withdrawals are made, how long will it take for the investment to grow to $3000?

    asked by .
  59. Physics

    A spring is attached to the top of a table. The spring has a spring constant of 500.0 N/m. The spring is initially compressed by 1.50 m by a baseball (0.145 kg). How much energy is present in the system from the compression? After release, what is the

    asked by Daddy
  60. Algebra2

    What is the vertex form of the equation? Show steps y=-x^2+12x-4

    asked by Steve
  61. Math

    Jun Wei has 12 more 10 cent coins than 20 cent coins. The total value of all his coins is $5.40. Find the total number of coins he has.

    asked by Jason Dhaki
  62. HELP WITH SCIENCE FAST

    1.  Most likely, ____ were formed when lava from the moon's interior flooded bowl­like regions on the moon's surface. (1 point) maria* highlands craters basins

    asked by help
  63. Math

    We are given the problem of communicating a series of symbols, each of which can take on one of 512 values at a rate of f_s =〖10〗^5 symbols/s. A) What is the required bandwidth if PCM is used with m=1? B) Repeat for PAM with m=2, if each pulse can take

    asked by James
  64. Math

    Ten analog measurements whose bandwidth is 4 kHz are to be transmitted simultaneously through a cable by time division multiplexing using PCM. Each message is sampled at a 10 kHz rate and amplitude quantized into 128 levels. The pulses are shaped with a

    asked by James
  65. geometry

    how does the exterior angle theorem makes sense based on the triangle angle-sum theorem? i know what both of the theorems are i just dont understand how they are 'connected'?? thanks!

    asked by camryn
  66. value

    Find The 6th And 5th Terms Of An A.P Whose First Term Is 6 And The Common Difference Is 7.Solution:n=6th,n=5th,(Tn=a+(n-1)d

    asked by value
  67. social studies

    What is the main idea?: The Persian Gulf War, or Operation Desert Storm, was waged in early 1991 between Iraq and a coalition of thirty-nine nations organized by the Unites States and the United Nations. Leading the coalition were the U.S., France, Great

    asked by Caitlyn
  68. math

    Saha spend 55% of her savings on a game. She has $135 remaining. how much was her savings before buying the game

    asked by joshua
  69. History

    What is the main reason some people believe there should not be any limits on presidential terms? A. There should be a monarch instead of a president. B. The people should decide how long a president can serve in a democracy.

    asked by Sami
  70. Algebra2

    A quadratic equation can be written in vertex form or in standard form. Sometimes one form is more beneficial than the other. Identify which form would be more helpful if you needed to do each task listed below and explain why. a- factor the equation b-

    asked by Steve
  71. Math: Help MEEE!!!!!!

    –0.6n ≤ 9.6 n ≥ –16 n ≥ 16 n ≤ –16 n ≤ 16 I Think Its n ≤ 16, Can U Help?

    asked by Agal
  72. science

    A motorcyclist (with a total mass of 180kg) travels up a hill. When she starts at the bottom of the hill (altitude 32m) her velocity is 43km/h. At the top of the hill (altitude 365m) she has a speed of 115km/h. The hill is 12km long and during the journey

    asked by Ottilia
  73. Language Arts urgent!!

    A student is writing a paper and needs to make sure she is using the word apprehension correctly. What reference book would help her check its part of speech?

    asked by Anonymous
  74. Algebra

    The revenue in dollars from the sale of concert tickets at x dollars each is given by the function R(x)=46,400x-800x^2. Find the difference quotient when x=27 a h=0.1, and when x=31and h=o.1. Intepret your answers

    asked by Lindsee
  75. History

    Which statement best explains the reason the Americans were never able to capture St. Augustine in Florida. A) A lack of cooperation among commanders led to poor execution.*** B) Poor planning and incompetent leaders led to disastrous outcomes. C) The

    asked by Sam
  76. ENGLISH FAST!!!!

    Which synonym for fear most strongly suggests a fear that causes one to freeze in terror? Alarm Dread Fright Panic I say D

    asked by Anonymous
  77. physical chemistry

    Calculate the freezing point of water at a depth of 10.0 cm below the surface of the water. The density of the water is 0.9998 g/cm3

    asked by Joesph
  78. Spanish

    Write 2 short paragraphs describing famous people from the Spanish speaking world. Make sure to include their cultural or political significance in your discussion.

    asked by Kirsten lindstrum
  79. American Gov.

    in the case of schenck vs united states justice oliver wendell holmes jr wrote: "the most stringent protection of free speech would not protect a man in falsely shouting fire in a theatre and causing a panic." this is an example of what kind of rights? a.

    asked by Mike
  80. check my work (american goverment)

    1.  Why was the Department of Defense created? (1 point) to place the U.S. Army and Navy in one executive department to establish a military chain of command to end disagreements between the U.S. Army and Navy

    asked by Anonymous
  81. chemistry

    HClO4 Express your answers as ions separated by a comma.

    asked by Precious Wiefue
  82. English Beowulf

    How did the culture of Beowulf view pride? Why?

    asked by Samuel
  83. Algebra

    - 2/5 x - 9 < 9/10

    asked by Person
  84. Math

    A certain person burn 6.5 calories per minute while walking how many calories will be burned if that person wants for 3 hours round your answer to the nearest tenth

    asked by Abby
  85. Geography

    Draw diagram to help find M angle ABD when M angle ABC equals 66 M angle ABD equals 5x + 3 and M angle DBC equals X plus 3

    asked by Amy
  86. English

    In the story “If I Forget Thee, Oh Earth…” why did Marvin’s father take him to see the view of earth from The Colony? A. The Colony had just discovered earth as a new planet in their galaxy, and he wanted to share the exciting news. B. He wanted

    asked by need help now
  87. african american history

    Does the fact that masters felt compelled or that it was to their benefit to recognize such "rights" indicate the limits of their hegemony over the slave

    asked by susieg
  88. chemistry (charges)

    just want to check if this group is neutral, R-NH2 thanks!

    asked by Anonymous
  89. Science 7

    a student made an electromagnet using a battery electrical tape and metal wire. she wanted to see what the effect would be if she switched the side of the battery she connected each end of the wire to. which of the following would be a correct conclusion

    asked by cat
  90. Math

    Situation: You exercised 24 hours each month for a year. How many hours did you exercise by the end of the year? You may be able to do the math mentally thanks to expanded notation and the Distributive Property How would I put this into distributive

    asked by Anonymous
  91. Sand Dunes (Science)

    Every year, Eli and his family visit the Great Sand Dunes desert in Colorado. Eli notices that more sand dunes with varied shapes and sizes appear each year. Explain what causes this phenomenon. PLZ DO NOT SAY WIKI!!!!!!!!

    asked by Agal
  92. Maths

    How would you decide the probability of each of the following? Choose A equally likely outcomes, or B experimental evidence . Write A and B on the answer line. Questions: First: A die is thrown. What proportion of times is 6 scored? Second: One hundred

    asked by Harjeet
  93. physics

    a uniform pole 7m long and weighing 10kg suppoted by a boy 2m from one end man3 from other end

    asked by sammani
  94. Pretty pleaaase Help

    As you watch a surfer ride a wave toward the shoreline, what is the shoreline. a. reference point b.distance being travled c.delta d.displacement refrence

    asked by Maya
  95. Pre Algebra

    Translate the word phrase into a variable expression: the sum of 16 and 4 times a number

    asked by Britney
  96. value

    A number is picked from the set p:{2,3,4,5,___9} find the probability that the number is prime.

    asked by value
  97. Pre Algebra

    Translate the variable expression into a word phrase: 2*(3-x)

    asked by Britney
  98. Pre Algebra

    Look at Arnold's attempt to solve the equation for b: 3b = 12 b = 3 · 12 b = 36 Describe the mistake that Arnold made.

    asked by Britney
  99. algebra 2

    Traveling with the wind, an airplane travels 210 miles im 4 hours. Against the wind, it takes six hours. Find the rate of the plane in still air and the velocity of the wind.

    asked by clarissa
  100. Math

    Jessica has 8 1/7 pounds of dog food. Feeds 1/7 pound per day. How many days will dog food last?

    asked by Misty
  101. Pre Algebra

    Use a five-step plan to solve the following word problem. Show all five steps in your response: Doug is twice Anne's age. Doug is 34 years old. How old is Anne?

    asked by Britney
  102. Applied math

    The temperature on Monday was -2 degrees Fahrenheit by noon it had warmed up to 5 degrees Fahrenheit how many degrees did the temperature change

    asked by Trenicia
  103. Math

    Two identical circles of largest possible area are to be cut from a 12in by 24in rectangular piece for stock. Find the amount of waste.

    asked by SMadrid
  104. math

    If i make 45 cakes and sell 3/5 how many did i sell?...... 45×3/5=?...idk.its for my daughter homework.idk even know how to do it ,let alone the answer. Thank u very much for your time.

    asked by richie
  105. Physics

    You buy a plastic dart gun, and being a clever physics student you decide to do a quick calculation to find its maximum horizontal range. You shoot the gun straight up, and it takes 36.761s for the dart to land back at the barrel. What is the maximum

    asked by Rose
  106. chemistry

    If I only have the name of this transitional coordination compound, bis(enthylenediamine)dinitroiron (III) sulphate how do you find the 2 outside the square bracket of this same thing but in formula form? [Fe (en)2 (NO2)2]2SO4 thanks.

    asked by Sherlique
  107. Calculus

    The velocity of an object is given by v(t)=t(t^2-1)^(1/3) feet per second. Find the total number of feet traveled by the object in the time interval [0,3] seconds. (A)51/4 (B)34/3 (C)45/4 (D)51/8 (E)45/8

    asked by Mike
  108. probability and Stats

    How can I find standard error from each of the following: a) a proportion & a sample size? b) mean, standard deviation, and sample size? c) mean & standard deviation? thank you

    asked by Bridget
  109. Probability & Stats

    An experiments consists of tossing 4 coins successively. The number of sample points in this experiment is a. 16 b. 8 c. 4 d. 2 Please show work and why it is the answer! Thank you!

    asked by Logan
  110. 4th grade math

    1) If a number has 2 and 6 as factors, then it has 12 as a factor 2) if a number has 12 as a factor, then both 2 and 6 are factors. The first statement is false. The second statement is true. Explain why, using words

    asked by Mythreyee
  111. Calculus

    The measurement of the circumference of a circle is found to be 70 centimeters, with a possible error of 0.9 centimeter. a) Approximate the percent error in computing the area of the circle. (Round your answer to two decimal places.) b) Estimate the

    asked by Kayla
  112. Science

    Imagine Two Artificial Satellites Orbiting Earth At The Same Distance. One Satellite Has A Greater Mass Than The Other One? Which Of The Following Would Be True About Their Motion? A.The satellite with the greater mass is being pulled toward Earth w/ less

    asked by cat
  113. Physics

    A girl delivering newspapers travels 3 blocks west, 8 blocks north, then 5 blocks east. 1) What is the magnitude of her resultant displacement? Answer in units of blocks. 2) Find the direction (measured from due east, with counterclockwise positive) of her

    asked by Jazz
  114. Science

    a student made an electromagnet using a battery electrical tape and metal wire. she wanted to see what the effect would be if she switched the side of the battery she connected each end of the wire to. which of the following would be a correct conclusion?

    asked by machile
  115. physics

    A car travels at a constant speed around a circular track whose radius is 2.87 km. The car goes once around the track in 332 s. What is the magnitude of the centripetal acceleration of the car?

    asked by BrookeNeed
  116. Math

    How much in 6.5cups = to fl oz ?

    asked by Polina
  117. Physics

    When the Sun is directly overhead, a hawk dives toward the ground at a speed of 6.09 m/s. If the direction of his motion is at an angle of 78.6 â—¦ below the horizontal, calculate the speed of his shadow along the ground. Answer in units of m/s

    asked by Jack
  118. chemistry

    what is the name of this coordination compound [CoSO4(NH3)5]Br?

    asked by James
  119. Math

    There are 4 sections of seat in the playhouse theatre. Each section has7 groups of seats.each group has 25 seats. How many seats are there in the theater? 25×7=175 seats

    asked by Tristan
  120. Science

    What caused the syringe to leave a puddle of water after sitting in the sun for 10 minutes ?

    asked by Anonymous
  121. Organic Chemistry

    Draw the product of the reaction: CH3CH2CH (double bond) CH2 + Cl2

    asked by Dominique
  122. Algebra

    Andrew needs x dollars for a snack. Scott needs 2 more dollars than Andrew, but Nick only needs half as many dollars as Andrew. Altogether they need $17 to pay for their snacks. How many dollars does Nick need? Thanks so much! Happy Halloween!

    asked by Katie
  123. mgf liberal arts

    Four accounting majors, two economics majors, and three marketing majors have interviewed for five different managerial positions with a large company. Find the number of different ways that five of these people could be hired if the first two positions

    asked by Anonymous
  124. Math

    Jimmy opens a savings account with a $200 deposit at the beginning of the month. The account earns 4.6% annual interest compounded monthly. At the beginning of each subsequent month, Jimmy deposits an additional $200. How much will the account be worth at

    asked by Amber
  125. Adv. functions

    When you simplify: sin(pi+x)cos((pi/2)-x)-cos(pi+x)sin(x+(3pi/2)) What's the answer cause I got -2sinxcosx, which I don't know if can simplify to -2sinx But the answer key says -1 so. I'm not sure how to get that

    asked by Anonymous
  126. physics

    A 84.0 kg person is being pulled away from a burning building as shown in the figure below.

    asked by bless
  127. physics

    (1) A uniform meter rod 4ON has a piece of weight of 2ON attached to one of its end. What is the center of gravity of the system from the weight end? (2) two bodies X and Y start from rest and move with uniform acceleration of a and 4a respectively. If the

    asked by Lorenz
  128. Math

    What's the simplest form of 3x 1/6?

    asked by Evan
  129. Physics 11 steve, bob,physics expert pls URGENT!!

    Coefficiant of friction between rubber tires and wet pavement is 0.50. brakes are applied to a 750kg car, intitally travelling at 30m/s and the car skids to a stop. What is the size and direction of the acceleration of the car.

    asked by Boby
  130. Math

    How many significant numbers are there in 2000? in 0.00150? p.s. I already studied it twice and i couldn't understand it. thanks!

    asked by JL
  131. Math

    What is the distance from kite C to fishing hook E

    asked by Ashley
  132. Algebra

    A rectangular field whose length is 33 less than four times its width needs to be enclosed with exactly 104 meters of fencing. What are the dimensions of the field?

    asked by Katie
  133. agebra

    The sum of two numbers is 1178. The first number is 270 less than three times the second number. What are the numbers?

    asked by Katie
  134. algebra

    The angles in a triangle are such that the measure of one angle is 10° more than the measure of the smallest angle, while the measure of the third angle is three times the measure of the smallest angle. Find the measures of all three angles, in degrees.

    asked by gina
  135. Algebra

    The length of a rectangle exceeds twice its width by 4 feet. If the area of the rectangle is 286 square feet, find the dimensions.

    asked by Katie
  136. Physics 11 damon pls URGENT!

    The coefficiant of friction between rubber tires and wet pavement is 0.5, and the breaks are applied to 750kg car, intitally travelling at 30m/s and the car skids to a stop. What is size and difection of the acceleration. How do i find acceleration of the

    asked by Jaena MacCharly
  137. Algebra

    wallet contains $290 in $5, $10, and $20 bills. The number of $5 bills exceeds the number of $10 bills by 4, and the number of $20 bills is 3 less than twice the number of $10 bills. How many bills of each type are there?

    asked by Katie
  138. algeba

    A ladder is leaning against a building. The base of the ladder is 8 feet from the wall, and the top of the ladder reaches 6 feet up the wall. How long is the ladder?

    asked by Shelly
  139. 8th algebra

    I only need help writing the equation, not solving it. This is sothe problem. Manuel's budget allows no more than $50 per week for gasoline and car washes. Gasoline costs $2.30 per gallon, and a car wash costs $8.50. This week, Manuel gets a car wash.

    asked by Martha
  140. Math

    One positive number is two more than a second number their product is 168

    asked by Eli
  141. Algebra2

    Which points are the best approximation of the relative maximum and minimum of the function? f(x)=x^3+3x^2-9x-8

    asked by Steve
  142. 8th Grade Algebra

    I need to find and write the equation for the problem. Layla wants to but a smart phone online using a $50 discount coupon along with a 20% discount on the original cost of the phone. Layla can spend up to $150. Write an inequality to find the original

    asked by Takisha
  143. Science

    A tree that sheds its leaves in the fall is exhibiting. A geotropism B photomotropism C phototropism D photoperiodism

    asked by Julia
  144. pre algebra 8th grade(0, 0.3), (1, 0.5), (2, 0.7),

    Candice wants to buy a sweatshirt that costs $39. She also wants some T-shirts that are on sale for $16 each. She has $150. Write an inequality to find how many T-shirts she can buy. I think it is 39 + 16t = 150 Thank you.

    asked by Rochelle
  145. Algebra

    Evaluate fraction numerator open vertical bar a minus 16 b close vertical bar over denominator open vertical bar a plus b close vertical bar end fraction when a = -10 and b = 3

    asked by Shelly
  146. physical chemistry

    The ice skate of a 210-pound hockey player is in contact with the ice over a 2.5mm x 15cm area. Determine the freezing point of the ice under the blade of the skate?

    asked by Joseph
  147. math 142

    1,000 are deposited into an account quarterly  for eight years at an interest rate of 7.87.8​% compounded quarterly. How much is in the account at the end of the 88 ​years? 

    asked by rudy
  148. URGENT ANY PhYSIcs teacher help thouroighly pls

    The coefficiant of friction between rubber tires and wet pavement is 0.5. Breaks are alllied to a 750kg car, intitally travelling at 30 m/s and the car skids to a stop. What is the magnitude and direction of the acceleration. Ik the magnitude and i kinda

    asked by Michael
  149. algebra--miss sue

    I need to find and write the equation for the problem. Layla wants to but a smart phone online using a $50 discount coupon along with a 20% discount on the original cost of the phone. Layla can spend up to $150. Write an inequality to find the original

    asked by Takisha
  150. English

    1. She explained to me how to draw a dinosaur. 2. She explained how to draw a dinosaur to me. (Are both okay? Which one is better?) 3. Susan suggested to us a very good idea. 4. Susan suggested a very good idea to us. (Are both okay? Which one is better?)

    asked by rfvv
  151. Physics

    What is the terminal speed for an 77 kg skier going down a 45 ∘ snow-covered slope on wooden skis μk= 0.060? Assume that the skier is 1.8 m tall and 0.40 m wide. Assume the skier's drag coefficient is 0.80. Express your answer using two significant

    asked by Niko
  152. chemistry

    Copper used in electric wires comes in two flavors (isotopes): 63Cu and 65Cu. 63Cu has an atomic mass of 62.9298 amu and an abundance of 69.09%. The other isotope, 65Cu, has an abundance of 30.91%. The average atomic mass between these two isotopes is

    asked by andrea
  153. pre algebra

    1. Frances earns a salary of $ 3,200 per month plus a commission of 2% of his sales. He wants to earn at least $4,000 this month. Write an inequality to find the dollar amount of the sales that will meet his goal. Identify what your variable represents. d=

    asked by Takisha
  154. English

    Need help fixing a run on sentence. I moved to the United States when I was young ut was easy to learn English, my parents were already here, they knew English already.

    asked by rian
  155. pre algebra 8th

    1. Frances earns a salary of $ 3,200 per month plus a commission of 2% of his sales. He wants to earn at least $4,000 this month. Write an inequality to find the dollar amount of the sales that will meet his goal. Identify what your variable represents. d=

    asked by Takisha
  156. Math

    Gabriel can ride his bike three times faster than he can run. He runs 9 miles and bikes 45 miles. If the total time for both activities is four hours, how fast can he run ?

    asked by Anonymous
  157. Algebra

    In triangle QRS, measure of angle R is 20 degrees more than measure of angle Q and measure of angle S is 115 degrees more than measure of angle Q. Find measure of angle R.

    asked by Madison
  158. Math

    Alex can complete a model rocket assembly in four hours less time than it takes Sean. Working together, they can complete the assembly in one and a half hours. How long would it take Alex to do the assembly working alone?

    asked by Anonymous
  159. brief calc

    Calculate the total area of the region described. Do not count area beneath the x-axis as negative.Bounded by the line y = 6x, the x-axis, and the lines x = 4 and x = 5

    asked by joe
  160. geometry

    The radius of a circle given C (4,-1) and (8,2). What is the equation that defines the circle if its center is at the fourth quadrant?

    asked by dheah
  161. geometry

    The endpoint of a diameter of a circle are L(-3,-2) and G(9,-6) what is the length of the radius of the circle?

    asked by dheah
  162. math

    If a car agency charges 240.00 per week to rent a car plus 0.25 per mile. How many miles can you travel in one week for 385.00

    asked by beth