Questions Asked on
February 19, 2017

  1. Algebra2

    suppose c and d vary inversely and d=2 when c=17 write an equation that models that variation find d when c=68

    asked by Steve
  2. MATH

    What is the percentage of sugar in the syrup made of 10 kg of water and 15 kg of sugar?

    asked by Anonymous
  3. math

    write a sequence of the transformation that maps quadrilateral ABCD onto quadrilateral A"B"C"D" in picture below.

    asked by cmac
  4. Algebra2

    write a recursive formula for the sequence 5,18,31,44,57 then find the next term. My answer is a1=5,an=an-1+13 The next term would be 70.

    asked by Steve
  5. Ordinary Differential Equation

    Form the differential equation of the family of straight line with slope and y- intercept equal

    asked by Bilal
  6. Math

    At the movie theatre, child admission is $5.50 and adult admission is $9.50. On Saturday, 148 tickets were sold for a total sales of $1170.00. How many adult tickets were sold that day?

    asked by Chris Harris
  7. Chemistry-Urgent

    The partial pressure of CO2 inside a bottle of soft drink is 4.0 atm at 25°C. The solubility of CO2 is 0.12 mol/L. When the bottle is opened, the partial pressure drops to 3.0 ✕ 10-4 atm. What is the solubility of CO2 in the open drink? Express your

    asked by Brianna
  8. math

    Calculate the volume of a steel bar which is 8cm long and 3.5cm in diameter

    asked by Margret
  9. chemistry

    Hello, I was confused on this chemistry problem and I was wondering if someone could please help me. 1) Consider the following chemical reaction: 2CH3OH(I) + 3O2 (g) → 2CO2(g) + 4H2O(I) Calculate the number of moles of CO2 produced when 11.25 mL of

    asked by molly
  10. chemistry

    What volume of a 3.90 M KI stock solution would you use to make 0.430 L of a 1.25 M KI solution?

    asked by john
  11. Algebra2

    Does the relation in the table represent direct variation, inverse variation, or neither? if it is direct or inverse variation, write an equation to represent the situation. Explain your answer x 5, 10, 15, 20 Y 2, 1, 2/3, 1/2

    asked by Steve
  12. Algebra

    150g of sugar was used to make a bottle of 8% syrup. How much water was used to make this bottle of syrup? How much syrup is there in this bottle?

    asked by Anonymous
  13. Math 104

    There are 5 cyclists in a race. There will be a first-place and a second-place prize awarded. In how many different ways can the 2 prizes be awarded?

    asked by Anonymous
  14. Chemistry

    Recall the reactions for this lab: S2O82- + 2I- → 2SO42- + I2 (slow) Reaction 1 The one that delays the solution turning blue: I2 + 2S2O32- → 2I- + S4O62- (fast) Reaction 2 b. All the S2O32 is consumed when the color change occurs. Therefore, Δ[S2O32]

    asked by Anonymous
  15. math

    Justin is 3 years older then Sam, and Justin’s age in 2 years will be twice what Sam’s age was 3 years ago. Find their present ages. i got 14 and 17 but the answer is wrong

    asked by allie
  16. Geo

    (SAT Prep) The diagonals BF and CE divide the hexagon ABCDEF into two equilateral triangles and a square. Find the perimeter of the hexagon if BF = 3 cm.

    asked by Anonymous
  17. physics

    A 2000kg car is slowed down uniformly from 20m/s to 5 m/s in 4s. What is the average total force on the car during this time.

    asked by Pau
  18. chemistry

    How many grams of CaCl2 would be dissolved in 1.1 L of a 0.17 M solution of CaCl2?

    asked by john
  19. Math

    Neil has a total of twelve $5 and $10 bills in his wallet. He has 5 times as many $10 bills as $5 dollar bills. How many of each does he have?

    asked by Juan Constantino
  20. Math

    The figure at right shows a long rectangular strip of paper, one corner of which has been folded over to meet the opposite edge, thereby creating a 30-degree angle. Given that the width of the strip is 12 inches, find the length of the crease.

    asked by Jamie
  21. Chemistry

    Write the formulas of the compounds formed by NH4+ with the following anions: CN−, HCO3−, SO42−, HPO42−

    asked by Miranda
  22. math

    Richard is 6 years older than Lisa, and in 5 years the sum of their ages will be twice as much as the sum of their ages 4 years ago. Find their present ages.

    asked by allie
  23. Maths

    Three circles of radius 1 unit fit inside a square such that the two outer circles touch the middle circle and the sides of the square. Given the centres of the circle lie on the diagonal of the square, find the exact area of the square. I got the answer

    asked by Lilly
  24. Chemistry

    Hello, I was hoping that I could get some help with calculating the mass needed to completely react with this question. In the following chemical reaction between H2 and N2 to produce NH3, what is the mass of N2 needed to completely react with 0.65 g H2 to

    asked by anon
  25. General Chemistry

    A student mixed the following reactants, using the general procedure for the experiment: 10.0 mL of 0.10 M KI, 10.0 mL of 0.0010 M Na2S2O3, 20.0 mL of 0.040 M K2S2O8, and 10.0 mL of 0.10M HCl. It took about 75 seconds for the mixture to turn blue. a. By

    asked by Alexander
  26. CHEMISTRY

    You carefully weigh out 20.00 g of CaCO3 powder and add it to 81.00 g of HCl solution. You notice bubbles as a reaction takes place. You then weigh the resulting solution and find that it has a mass of 92.80 g . The relevant equation is

    asked by kaba
  27. Math

    Mary is riding a merry-go-round, whose radius is 25 feet and which is turning 36 degrees per second. Seeing a friend in the crowd, she steps off the the outer edge of the merry-go-round and suddenly finds it necessary to run? At how many miles per hour

    asked by Mike
  28. Maths

    A farmer wishes to fence his field with 3 rows of wire.if the dimensions of the field are 120m by 68m,find the total length of wire required

    asked by Anandh
  29. Chemistry

    which salt solution would have the highest ph and why KI,KBr,KF,KCL or they all have the same ph. Im leaning towards KF since im pretty sure the other salts are neutral?

    asked by Sean
  30. Pre-Calculus

    How do I solve the equation: 3 = 2.1 sin[(pi/6)t - 5pi/6] + 3.2

    asked by Brian
  31. chemistry

    calculate the number of molecules in 6.4g of so2. (b) 1.5 moles of hydrogen chloride

    asked by obot
  32. Chemistry

    Recall the reactions for this lab: S2O82- + 2I- → 2SO42- + I2 (slow) Reaction 1 The one that delays the solution turning blue: I2 + 2S2O32- → 2I- + S4O62- (fast) Reaction 2 b. All the S2O32 is consumed when the color change occurs. Therefore, Δ[S2O32]

    asked by Alexander
  33. Geo

    (SAT Prep) The perimeter of pentagon ABCDE is 30 in, AB = 7 in, BC = CD = 6 in, DE = 5 in. How many sides of the pentagon have equal length?

    asked by Anonymous
  34. Chemistry

    What are the molality and mole fraction of solute in a 30.1 percent by mass aqueous solution of formic acid (HCOOH)

    asked by Daryll
  35. chemistry

    With reference to collision theory account for the colour change that occurred when HCl was added to K2CrO4 (Cromate)

    asked by kate
  36. Physics

    The dipole moment of a water molecule is 6.37E-30 Cm. What is the electric potential's magnitude 1.58 nm from a water molecule along the axis of the dipole?

    asked by Sarah
  37. material science

    What is the ratio of the maximum axial stress to the maximum bending stress in the inclined cell walls of hexagon honeycombs in terms of t,h ,l, and theta?

    asked by lorenzo
  38. chemistry

    What are the molality and mole fraction of solute in a 25.5 percent by mass aqueous solution of formic acid (HCOOH)?

    asked by john
  39. Maths bearing

    City A is 300km due east of city B ..city C is 200km on a bearing of 123* from city B how far is it from C to A

    asked by Aisha
  40. Physics

    When dots are placed on a page from a laser printer, they must be close enough so that you do not see the individual dots of ink. To do this, the separation of the dots must be less than Raleigh’s criterion. Take the pupil of the eye to be 2.9 mm and the

    asked by Megan
  41. Chemistry

    . A student mixed the following reactants, using the general procedure for the experiment: 10.0 mL of 0.10 M KI, 10.0 mL of 0.0010 M Na2S2O3, 20.0 mL of 0.040 M K2S2O8, and 10.0 mL of 0.10M HCl. It took about 75 seconds for the mixture to turn blue. a. By

    asked by Anonymous
  42. Math

    Using the Widmark equation, Write the equation you would solve to figure out how long it will take before his BAC is 0.08. Is it okay to round any constants to 3 decimal places.

    asked by Vaughn
  43. chem

    When 3.517 grams of a hydrocarbon, CxHy, were burned in a combustion analysis apparatus, 11.59 grams of CO2 and 3.164 grams of H2O were produced. In a separate experiment, the molar mass of the compound was found to be 40.06 g/mol. Determine the empirical

    asked by jillian
  44. science

    a body is released from the great height and falls freely towards the earth . another body is released from the same height , one second later . then the separation between the two bodies , two seconds after release of the second body is

    asked by farha
  45. Chemistry

    What are the molality and mole fraction of solute in a 30.1 percent by mass aqueous solution of formic acid (HCOOH)

    asked by Daryll
  46. bio

    a heterozygous tall pea plant is crossed with a short pea plant.what are the expected genotypic and phenotypic ratio for this cross

    asked by yukino
  47. Differential equation

    A spherical balloon remains spherical as it is slowly inflated. The radius of the balloon r (in cm) at time t (in seconds) satisfies the differential equation. Dr/dt = k/r^2 where k is a positive constant. When the radius is 3 cm, the radius is increasing

    asked by Anon
  48. Maths,

    A certain is to be shared among three brothers ,one of them gets 2/5 of it,another gets 1/4 of it and the third one gets #2.10k. How much is the sum of money?

    asked by Pee
  49. Chemistry

    What are the molality and mole fraction of solute in a 25.5 percent by mass aqueous solution of formic acid (HCOOH)? (Explain how you got the answer please)

    asked by Brianna
  50. Physics

    2300 Joules is used to lift a wheelbarrow through 4 meters up an inclined plane into a container. Why does the man use more joules (3500 J) to push the wheelbarrow?

    asked by Tia
  51. Chemistry

    Hello, I really don't understand how to find the grams of moles in some of these reactions. If someone could help I would appreciate it. 1) Balance the following chemical reaction and determine the number of moles of HI produced when 2.33 moles of H2(g)

    asked by Anonymous
  52. probability

    Tad draws three cards at random, without replacement, from a deck of ten cards numbered 1 through 10. What is the probability that no two of the cards drawn have numbers that differ by 1? Express your answer as a common fraction.

    asked by nikhil
  53. chemistry

    Balance the following chemical reaction and determine the number of moles of HI produced when 2.33 moles of H2(g) are consumed in the following chemical reaction: ___H2(g) + __I2(g) -> ___HI (g)

    asked by anon
  54. Math

    In a book closet, mathematics books are kept in stacks of 4. If each student carries no more than one stack, what is the least number of students needed to carry books for a class of 23? Your multiple choices are a. 5 students b. 6 students c. 27 students

    asked by Kelly
  55. Math

    A segment that is a units long makes a C-degree angle with a segment that is b units long. In terms of a, b, and C, find the third side of the triangle defined by this SAS description.

    asked by Jane
  56. Calculus II

    Find the centroid (x¯,y¯)(x¯,y¯) of the region bounded by: y=5x^2+6x y=0 x=0 x=6 I know the integral (think, at least) is from 0 to 6 and between the first and second equation given, but I missed this lecture and have no idea how to find the center of

    asked by Ethan
  57. Math

    A swimming pool is 25m long, 10m wide and 2m deep what is the volume

    asked by Zak
  58. algebra

    complete table for the following equation 2x+y=9 x y -3 1 4 5 -1

    asked by sofia
  59. chemistry

    A 8.408 gram sample of an organic compound containing C, H and O is analyzed by combustion analysis and 12.53 grams of CO2 and 3.849 grams of H2O are produced. In a separate experiment, the molar mass is found to be 118.1 g/mol. Determine the empirical

    asked by ALAN
  60. Chemistry-Urgent

    What is the percent by volume of ethanol in a solution that contains 26 mL of ethanol dissolved in 113 mL of water? explain please

    asked by Brianna
  61. Algebra

    Chloe wants to invest a total of $39000 into 2 savings account, one paying 6% per year in interest and the other paying 9% per year in interest (a more risky investment). If after 1 year she wants the total interest from both accounts to be $2730. How much

    asked by Litzy
  62. Chemistry

    What are the molality and mole fraction of solute in a 30.1 percent by mass aqueous solution of formic acid (HCOOH) can you please explain it better? I still don't quite understand

    asked by Daryll
  63. chem

    What are the molality and mole fraction of solute in a 25.5 percent by mass aqueous solution of formic acid (HCOOH)? work this one out please i didnt understand

    asked by Brianna
  64. Physical Science

    MH = 16.32 g/kg SH = 9.86 g/kg Air mass temperature = 15° C (59° F) What is the Relative humidity & the approximate Dew-point temperature? How do i set this problem up? I do not understand. Thanks

    asked by Jules
  65. Chemistry 121

    . Using your calculated value for molar heat of reaction, how much heat would be given off in kilojoules if 3.0 grams of magnesium were to react with excess hydrochloric acid. Show work for your calculation. Value is 31.304 kJ/mol Mg

    asked by Ty M.
  66. Math

    Mr. shows bought movie tickets for the members of his family and spent $12.50 on popcorn. He spent a total of $46.25 for his family to go to the movies. How many tickets did he buy? (Write an equation containing a variable and solve)

    asked by Jamye
  67. math

    Problem 1:A semi-circular garden has a radius of 10 meters. What is its area? ( Use pi =3.14) Answer:157m^2 Problem 2:The base of a cylindrical tank has a radius of 4.5 meters. What is its area? ( Use pi=3.14) Answer:65.585m^2 Problem 3:In the middle of a

    asked by edd
  68. fractions

    Sam saved 4/7 of his paycheck and spent 2/5 of the remaining money. He was then left with $9. What was the original value of Sam's paycheck?

    asked by anagha
  69. Math

    Peanuts, walnuts, and cashews are mixed by volume in the ratio 5:3:2, to make a party snack. The number of cups of walnuts needed to make 12 cups of party mix are between: a) 1 and 2 b) 2 and 3 c) 3 and 4 d) 4 and 5

    asked by Terrence
  70. civic education

    List six And explain internal limitation of human right And six external limitation of human right

    asked by Hauwa
  71. Algebra

    Find three consecutive integers whose sum is 138 by writing and solving an equation.

    asked by Bonnie
  72. Math

    Raoul got to spin this spinner ,to see what chorehe had to do Saturday morning. He could wash the dishes, wash the car,wash the dog,or change the paper in the rabbit cage.what is the chance he will have to wash something Saturday morning. As a fraction and

    asked by T
  73. Chemistry

    If you have 1911.9 g of a bleach solution. The percent by mass of the solute sodium hypochlorite NaOCl is 3.62. How many grams of NaOCl are in the solution

    asked by Daryll
  74. Math

    If the volume of a given cube is 512cm. What is the length

    asked by Lisi
  75. math

    A lawn50m.long and40m.broad has a path of uniform width 8m. outside it.Find the area of the path.

    asked by Anshu
  76. Math

    In a book closet, mathematics books are kept in stacks of 4. If each student carries no more than one stack, what is the least number of students needed to carry books for a class of 23?

    asked by Kelly
  77. Math

    Which is a reasonable estimate? 2/3 + 4/5 a.

    asked by Kelly
  78. Math

    Ryan needs 8 5/16 feet of molding to finish a closet. He has 6 feet of molding. How many more feet of molding does he need?

    asked by Kelly
  79. Chemistry

    You have 1683.8 g of a bleach solution. The percent by mass of the solute sodium hypochlorite, NaOCl, is 3.62%. How many grams of NaOCl are in the solution? (show work Please)

    asked by Brianna
  80. Astronomy

    OK I have no clue how to do this . Can you believe that it is about -360¤F on Neptune,about -357¤F on Uranus? BRRRR ! That's cold! What is the temperature outside today in your town? How much warmer is it in your town than on Neptune? How much warmer is

    asked by Unknown needs help
  81. Chemistry

    What volume of a 4.50 M KI stock solution would you use to make 0.455 L of a 1.25 M KI solution?

    asked by Daryll
  82. Math

    Make c the subject c=ne/R±nr

    asked by Exponent
  83. chemistry

    What is the molality of a solution containing 11.1 g Na2SO4 dissolved in 2269.2 g of water? Just making sure would it be 11.1 divided by 2269.2 times 100?

    asked by Brianna
  84. maths

    Find the smallest positive 2 digit whole no which is divisible by 3 such that the sum of it digit is 9.

    asked by akshay gupta
  85. physics

    how is energy conserved ith a spring and box on a ramp. does 1/2kx^2 still equal gpe? what if the spring displacement is the same but the angle of the ramp changes, causing the gpe to change. how is energy conserved since the gpe is lower than before but

    asked by Anonymous
  86. Math

    Mr. shows bought movie tickets for the members of his family and spent $12.50 on popcorn. He spent a total of $46.25 for his family to go to the movies. How many tickets did he buy. (Write an equation containing a variable and solve) this is all the

    asked by Jamye
  87. science

    what are all the types of clouds

    asked by donald trump
  88. algebra

    Finde three consecutive integers such that the sum of the first and third is 16

    asked by kath
  89. Chemistry-Urgent

    What is the molality of a solution containing 11.1 g Na2SO4 dissolved in 2269.2 g of water?

    asked by Brianna
  90. maths

    23m round off to the nearest 5m

    asked by Gabriel
  91. chem

    0.210 mole of Na2CO3 in 200.0 mL of solution

    asked by Anonymous
  92. math

    Give an example of an open interval, and an example of a set that is not an open interval. Use proper set notation and explain.

    asked by maggie
  93. Physics

    2300 Joules is used to lift a wheelbarrow through 4 meters up an inclined plane into a container. Why does the man use more joules (3500 J) to push the wheelbarrow?

    asked by Kale
  94. english

    a good debatable thesis for A good citizen A good citizen is honest and works hard so they could provide for the family

    asked by Amber
  95. Math

    While solar energy powered home systems are quite expensive to install, adding some passive energy features to conventional construction can make a substantial reduction in heating and cooling costs. Passive solar requires no machinery and uses the

    asked by Karola
  96. Physics

    A 50 ohm resistor consists of a copper portion joined to carbon portion, the resistance of the resistor being the sum of the resistance for 2 portions. Find the resistance of the copper portion of the resistor so that the combined resistance will be

    asked by Mycah
  97. biology

    a. what are the composition in nutrient broth? b. give 5 different types of media used for cultivation of microbes and define each?

    asked by sophie
  98. chemistry

    You have 1683.8 g of a bleach solution. The percent by mass of the solute sodium hypochlorite, NaOCl, is 3.62%. How many grams of NaOCl are in the solution?

    asked by john
  99. Algebra I

    3 bags of chips and 5 bottles of water cost $31. A chip costs one dollar less than 3 bottles of water. Find the cost of each.

    asked by Elizabeth
  100. Organic Chemistry

    Draw only the different stereoisomers for the following compounds: a) 2,4-diiodohexane b) 1-s-butyl-3ethylcycloheptane

    asked by Louis
  101. Organic Chemistry

    Draw all the possible conformations for the following compounds and rank their stability (#1 least stable). a) 3-chloro-2-methylpentane rotating between c-3 and c-4 b) 1-cyclopropyl-2-flurocyclohexane

    asked by Louis
  102. Physics

    17 km due north, then at 7° south of east, and then 15 km at west of south

    asked by Sotha
  103. addition vectors (physics)

    75 km at 25° north of east, then 75 km at 65° south of west, and then 75 km due south

    asked by Sotha
  104. physical science

    How many minutes would be required for a 310.0 W immersion heater to heat 202.0 g of water from 22.0°C to 95.6°C?

    asked by Keisha morris
  105. Differential equations

    Good morning. Quick question. dr/dt=K/r^2 When the radius is 3cm, the radius is increasing at a rate of 5/36pi. Use this fact to find the constant K. I know that the general form of these growth factors is e^kt but im not sure where the rate and the

    asked by Mat
  106. Physics

    calculate K.E in Joules of a baseball w/ a mass of 237.2 cg moving at 85.00 mph

    asked by Sarah
  107. fractionss

    The Burger Barn served 24 customers yesterday. 1/2 of the customers ordered breakfast. 1/3 of the remaining customers ordered take-out. The rest of the customers ordered dessert. How many customers ordered desert

    asked by anagha
  108. math

    one half of jeans age two years from now plus one third of her age three years ago is twenty years. how old is she now?

    asked by kath
  109. chemistry

    how many moles of co2 produced when 3 moles of hcl react with caco3

    asked by sandeep
  110. math

    Write the inequality that represents the solution set for −15/9y < 11/13 . Please help thanks

    asked by z
  111. Science

    What is methanol?

    asked by J
  112. maths

    A boat covered the distance of 450km in 13/2 hrs. if the boat covers thefirst two third of the distance at the speed of 75km/hrs then at what speed would itcovers the remaining distance.

    asked by akshay gupta
  113. physics

    I'm not sure with this conversion... getting 9.843x10^4 ft/min to m/s ? How do I get to m/s using a specification conversion without using online conversions?

    asked by Sarah
  114. physics

    Last one! Thankyou for the help thus far... calculate the KE in kJ of 9.100 x 10^5 atoms of silver moving at 1800. km/hr. ... the atoms part is what I'm confused about.

    asked by Sarah
  115. Calculus

    Please help me solve these problems. 1.Find the inverse function (f^-1) of √3x-2 2. Integration ∫ the top is x while the bottom is 1. (sin(t))/t dt

    asked by Jessica
  116. math

    B owes $3000 due 2 years from today without interest and $2000 with interest at 4% compounded quarterly due in 6 years from today.if money worth is 5% compounded semiannually what single payment made 4 years from today will discharge his debts?

    asked by AAA
  117. chemistry

    What is the molality of a solution containing 11.1 g Na2SO4 dissolved in 2269.2 g of water?

    asked by john
  118. Math

    A circular sector has an 6.26-inch radius and a 10.84-inch arc length. There is another sector that has the same area and the same perimeter. What are its measurements?

    asked by Jane