Kris

Popular questions and responses by Kris
  1. math

    when the sum of 5 and 6 is subtracted from the product of 5 and 6 what is the difference

    asked on August 24, 2009
  2. algebra

    This isosceles triangle has two sides of equal length, a, that are longer than the length of the base, b. The perimeter of the triangle is 15.7 centimeters. The equation 2a + b = 15.7 can be used to find the side lengths. If one of the longer sides is 6.3

    asked on October 13, 2014
  3. chem

    Given an aqueous solution in which the [H+] = 2.5EE-7 M, what is the molar hydroxide ion concentration

    asked on May 5, 2013
  4. AP CHEMISTRY

    Commercial brass, an alloy of Zn and Cu, reacts with hydrochloric acid as follows. Zn(s) + 2 HCl(aq) ZnCl2(aq) + H2(g) (Cu does not react with HCl.) When 0.5093 g of a certain brass alloy is reacted with excess HCl, 0.0953 g ZnCl2 is eventually isolated.

    asked on August 1, 2013
  5. Math

    A bus travels 400 Miles in 8 hours how many miles will the bus travel in 2 days

    asked on March 22, 2016
  6. chemistry

    What is the conjugate acid for NH2- ? N3- NH2- NH4+ H+ I thought it was NH4+ but it was wrong. Isn't it suppose to be NH3+ but they don't have on this choices.

    asked on October 4, 2015
  7. Calculus

    Find an equation of the tangent line to the curve at the given point. y = 6e^x cos x, (0, 6)

    asked on November 7, 2011
  8. Algebra

    How long will it take for the population of a certain country to double if its annual growth rate is 1.5%? Round to the nearest year. Use the exponential growth model P(t) = P0e^kt

    asked on June 10, 2010
  9. chemistry

    You have a chemical sealed in a glass container filled with air. The glass container has a mass of 200.0 grams and the chemical has a mass of 800 grams. The total mass of the set-up is 1000 grams. The chemical is ignited by means of a magnifying glass

    asked on August 1, 2013
  10. Chemistry

    List in increasing order of expected Rf values in a TLC experiment: salicylic acid, toluene, and benzophenone.

    asked on July 1, 2013
  11. Angle of elevation

    A rocket fired straight up is tracked by an observer on the ground a mile away. a)Show that when the angle of elevation is theta, the height of the rocket in feet is h=5280tan(theta).

    asked on February 6, 2014
  12. Chem

    Can you check to see if I'm correct? Which of these substances are elements? a. silicone b. quartz c. iodine d. water e. silicon f. lead is the answer: c, e, and f?

    asked on September 10, 2015
  13. Chemistry

    Hi! I am having some trouble with this question, can you please help me? Which of the following describe chemical properties? Check all that apply. - Iodine (a purple solid) becomes a purple gas. - Titanium is less dense that iron . - Water freezes at 0'C

    asked on September 10, 2015
  14. chemistry II

    If a 2.15-g sample of gas occupies 750. mL at STP, what is the molar mass of the gas at 125 degrees celcuis

    asked on February 3, 2011
  15. Physics

    In a friendly neighborhood squirt gun contest a participant runs at 7.8 m/s horizontally off the back deck and fires her squirt gun in the plane of her motion but 45' above horizontal. The gun can shoot water at 11 m/s relative to the barrel, and she fires

    asked on October 9, 2017
  16. Physics

    A student says a speed of 50 m/s is faster than a speed of 140 km/h because the number is bigger. what would you say to them?

    asked on September 5, 2016
  17. math

    evaluate without using a calculator [log(5)4 x log(2)10 ]/ [log(25)√10]

    asked on July 18, 2013
  18. Math

    the difference between 3 times a number and 11 is 10

    asked on November 5, 2012
  19. physics

    A speed skater moving across frictionless ice at 9.0 hits a 6.0 -wide patch of rough ice. She slows steadily, then continues on at 6.1 m/s. What is her acceleration on the rough ice?

    asked on September 11, 2012
  20. chemistry

    A sample of gas with a mass of 1.62 g occupies a volume of 941 mL at a pressure of 748 torr and a temperature of 20.0 C. What is the molar mass of the gas?

    asked on July 26, 2012
  21. Chemistry

    Is "sharpening a pencil" more of a physical change than souring of milk, fermenting of grape juice or rusting of iron? Thanks anyone!

    asked on July 24, 2010
  22. Math

    Felicia traveled 7 kilometers to school 1/10 of that time she walked and 9/10 of the distance she rode a bus. A. How far did Felicia walk? B. How fare did she ride?

    asked on December 8, 2009
  23. business

    what is A series of stages in which a products sales revenue and profits change over time.

    asked on July 6, 2008
  24. Math

    The only way to get to Ship Island is to take a boat, which is free for 2 and under, $17 for children 3 to 10 years old, $25 for seniors 62 and over and $25 for everyone else. Debbie paid $116 for 6 people in her family to go to the island for the day. Is

    asked on January 21, 2018
  25. Math

    A computer is purchased at 2000$. After each year, the resale value decreases by 25%. What will the resale value be after 3 years?

    asked on May 8, 2017
  26. Math

    A bus travels 400 Miles in 8 hours how many miles will the bus travel in 2 days

    asked on March 26, 2016
  27. Chemistry

    Name three properties of metal for which metallic bonds are responsible

    asked on March 4, 2015
  28. chemistry 12

    a chemical reaction released 50.0kJ of energy as it heated a sample of water from 17.0 degrees celsius to 75.0 degrees Celsius, what mass of water was heated? I have no clue as to how to do this! can anyone help?

    asked on September 4, 2014
  29. statistics

    Use a table of t-values to estimate the P-value for the specified one-mean t-test. Left-tailed test, n=12, t= -3.412. a=p0.005. c= 0.005

    asked on February 21, 2014
  30. economics

    What is the opportunuity cost if you make 15 a hour but you decide not to work for a 1 hour and go to the movie which cost 10 what is the opportunity cost?

    asked on November 2, 2013
  31. Calculus

    (cos πx + sin πy)4 = 54; Implicit Differentation

    asked on October 9, 2013
  32. math

    a local summer baseball team plays 20 games each season. so far, they have won 9 games and lost 2. how many more games must they play win this season to win at least 75% of all their games?

    asked on September 21, 2013
  33. CHEMISTRY

    Bacterial digestion is an economical method of sewage treatment. 5CO2(g) + 55NH4+(aq) + 76O2(g) right arrow Bacteria C5H7O2N(s) + 54NO2-(aq) + 52H2O(l) + 109H+(aq) bacterial tissue The above reaction is an intermediate step in the conversion of the

    asked on August 1, 2013
  34. chemistry

    Consider the following unbalanced reaction. P4(s) + F2(g) PF3(g) How many grams of F2 are needed to produce 212 g of PF3 if the reaction has a 79.8% yield?

    asked on August 1, 2013
  35. math

    Sams shoes makes a profit of 38$ on every pair of athletic shoes it sells. How many pairs of shoes must Sam sell to earn a profit of 950?

    asked on June 30, 2013
  36. chemistry

    Zn(s) + 2AgNO3(aq) = 2Ag(s) + Zn(NO3)2 (aq) It would require_____g of zinc to produce 5.40g of silver.

    asked on June 12, 2013
  37. Algebra

    I need some help! Determine whether infinite geometric series has a finite sum. If so, find the limiting value. 112+56+28+....

    asked on April 16, 2013
  38. Algebra

    I need some help! Determine whether infinite geometric series has a finite sum. If so, find the limiting value. 112+56+28+....

    asked on April 16, 2013
  39. Literature

    In I Am Nujood, The urban elites Nujood encounters in the courtroom and at the Yemen Times lead very different lives from those of Nujood and the country people of Yemen. How are these “enlightened” people actually disconnected from the rest of their

    asked on April 16, 2013
  40. Literature

    In I Am Nujood, what enables Shada to take up Nujood’s cause so quickly and effectively? How does Shada, whom Nujood calls her “second mother,” open up Nujood’s world? Who else teaches Nujood about what a “real” family can be like?

    asked on April 16, 2013
  41. Literature

    In I Am Nujood, Nujood says that when her family was driven from Khardji, they lost “a small corner of paradise.” How do the injustices endured by Nujood’s father and brother, Fares, show that life in a patriarchal society can be hard not just for

    asked on April 16, 2013
  42. Algebra Multiple choice revised!! HELP

    I have a few questions I need help with! Please explain if my answer was not right how you got to it. I got 1.) B 2.) A 3.) C 1. Solve the system by triangularizing the augmented matrix and using back substitution. If the system is linearly dependent, give

    asked on March 28, 2013
  43. Algebra

    The table shows men's shoe sizes in the United States and the corresponding European shoe sizes. Let y = f(x)represent the function that gives the men's European shoe size in terms of x, the men's U.S. size. Men's U.S. shoe size, Men's European shoe size 8

    asked on October 27, 2012
  44. Calculus

    Find the critical numbers of the function. (Enter your answers as a comma-separated list. If an answer does not exist, enter DNE.) h(p) = (p − 2)/(p^2 + 9)

    asked on December 5, 2011
  45. Math

    Which of the following shows estimating 287 + 491 by using compatible numbers?

    asked on September 22, 2011
  46. chemistry II

    If a 2.15-g sample of gas occupies 750. mL at STP, what is the molar mass of the gas at 125 degrees celcuis

    asked on February 3, 2011
  47. math

    Have to draw a parallelogram that is not a rectangle with a base of 6cm and a hieght of 4cm

    asked on January 17, 2011
  48. math

    A person’s blood glucose level and diabetesare closely related. Let x be a random variable measured in milligrams of glucose per deciliter (1/10 of a liter) of blood. After a 12-hour fast, the random variable x will have a distribution that is

    asked on November 29, 2010
  49. Calculus HARD NEED HELP

    The volume of a cone of radius r and height h is given by V=(1/3)pir^2h. If the radius and the height both increase at a constant rate of 2cm/s at which rate in cubic cm/s is the volume increasing when the height is 8cm and the radius is 6cm. So The answer

    asked on October 17, 2010
  50. Calculus

    The volume of a cone of radius r and height h is given by V=(1/3)pir^2h. If the radius and the height both increase at a constant rate of 2cm/s at which rate in cubic cm/s is the volume increasing when the height is 8cm and the radius is 6cm. So The answer

    asked on October 17, 2010
  51. math

    how do you cange 14/30 into a desimal and precent?

    asked on September 13, 2010
  52. accounting

    E4-1 The trial balance columns of the worksheet for Briscoe Company at June 30, 2008, are as follows. BRISCOE COMPANY Worksheet For the Month Ended June 30, 2008 Trial Balance Account Titles Dr. Cr. Cash $2,320 Accounts Receivable 2,440 Supplies 1,880

    asked on September 13, 2010
  53. physic

    How much current will be flowing through a 57.0m length of copper wire with radius 5.7mm if it is connected to a source supplying 620V. (The resistivity of copper is 1.68x10^-8ohm's.m

    asked on August 4, 2010
  54. Intermediate Algebra

    Rewrite the following as an equivalent logarithmic equation.Do not solve. Show your work. m^n=r

    asked on June 10, 2010
  55. chemistry

    Only 6.1 mg of calcium oxalate, Ca(C2O4) dissolves in 1.0 L of water at 25 Celsius. What is the solubility product of calcium oxalate?

    asked on May 23, 2010
  56. physics

    A long horizontal hose of diameter 4.6 cm is connected to a faucet. At the other end, there is a nozzle of diameter 1 cm. Water squirts from the nozzle at velocity 20 m/sec. Assume that the water has no viscosity or other form of energy dissipation. a)

    asked on April 29, 2010
  57. math

    terry shared three pizzas with some friends. terry ate 1/4 of them. how much pizza did terry eat?

    asked on December 4, 2009
  58. Math

    A number has four digits. the sum of the first and last digits is twice the second digit. The second digit is 2 less than the third digit. The last digit is twice the first. Some of the digits are alike. what is the number??

    asked on February 24, 2009
  59. Language Arts/Capitalization

    Quick question: When writing CHRISTIAN CLUB is it Christian Club or Christian club? Thank you

    asked on November 30, 2007
  60. algebra

    what is the perimeter of a square with sides that are sqrt3 + sqrt5 on every side? what is the area? not perimeter area= (sqrt3 + sqrt5 )(sqrt3 + sqrt5 ) Multiply it out. I will be happy to critique your thinking and work.

    asked on June 29, 2007
  61. algebra

    evaluate and simplify 6 - square root20 ----------------- 2 The square root of 20= sqrt (4*5)= sqrt4 * sqrt5= 2 sqrt5 The square root of 20= sqrt (4*5)= sqrt4 * sqrt5= 2 sqrt5

    asked on June 29, 2007
  62. Adverb or Adjective

    Can you please tell me what "first" is in the following sentence. It was up to another American, Robert Fulton, to develop the first widely successful steamboat. I think "first" is an adjective modifying steamboat. Thanks, Kris You are correct thank you so

    asked on March 16, 2007
  63. Geography

    Describe the civil war in Syria and Yemen. How are they similar? How are they different?

    asked on April 9, 2020
  64. math

    johnny has 5 apples and he gives 1 away

    asked on December 10, 2019
  65. algebra

    Through (5, -4), parallel to 8x + 3y =31

    asked on September 22, 2019
  66. Math

    Suppose that f(x)=x−7x^[1/7] (A) Find all critical values of f. (B) Use interval notation to indicate where f(x) is increasing and also decreasing. (C) Find the x-coordinates of all local maxima and local minima of f. (D) Use interval notation to

    asked on March 27, 2019
  67. Math

    Suppose that f(x)=x^[1/3](x+3)^[2/3] (A) Find all critical values of f. If there are no critical values, enter None . If there are more than one, enter them separated by commas. Critical value(s) = (B) Use interval notation to indicate where f(x) is

    asked on March 27, 2019
  68. Physics

    Elastic behavior: when loads are small how much deformation occurs? What materials deform least?

    asked on October 3, 2018
  69. Science

    A pulley system shows is use to raise a load of 600N through 8m. If the effiency I 90%. Calculate a, machincal advantage b. Workdone by the effort c. Effort applied

    asked on June 24, 2018
  70. math

    carlos makes geometrical artworks out of sheet metal. the dimensions of a full size sculpture will be 6 times the dimensions of the model shown below. He will not use any metal for the bottom base of the cylinder. How many square feet of sheet metal will

    asked on April 24, 2018
  71. Math

    A tiling company specializes in multi-colour tile patterns. A small hotel is interested in the patterns below for its square shaped reception area. How many dark coloured tiles will there be if the reception area needs an area of 18 x 18.

    asked on December 15, 2017
  72. Algebra II

    (3-4yi)(6+7i)-[(2-3yi)-3(1+7i)] Express it in a+bi form I got 19+42i-21yi+28y but I do not know how to express it in a+bi form, can you please help me with it?

    asked on October 30, 2016
  73. Stoichiometry

    What mass of water is produced from 10g of sulfuric acid ?

    asked on July 1, 2016
  74. math

    A runner has a stride length of 5 feet for the first half of the race and a stride length of 4.5 feet for the second half. How many strides would it take to finish the second half of the marathon? Hint: 5 ft is 5.0 x 10 4.5 is 4.5 10

    asked on May 4, 2016
  75. Math

    A bus travels 400 Miles in 8 hours how many miles will the bus travel in 2 days

    asked on March 23, 2016
  76. engineering math

    What is the increase in temperature necessary for a hydrogen gas, initially at 0°C, to increase its volume by 5% at constant pressure?

    asked on August 9, 2015
  77. academic excellence

    ms. sue the questions I need help with you answered o Jan 27, 2015 can you help me with the same questions? there are 20 of them. I saw them online.

    asked on May 27, 2015
  78. Math - Help Me Please

    Stereo Inc. sells a stereo system for $300 down and monthly payments of $40 for the next 2 years. If the interest rate is 3.25% per month, find: a) The cost of the stereo. b) The total amount of interest paid. I am having trouble figuring out the correct

    asked on April 3, 2015
  79. math- please help me

    Stereo Inc. sells a stereo system for $300 down and monthly payments of $40 for the next 2 years. If the interest rate is 3.25% per month, find: a) The cost of the stereo. b) The total amount of interest paid. I am having trouble figuring out the correct

    asked on April 3, 2015
  80. Math - Help Please

    Stereo Inc. sells a stereo system for $300 down and monthly payments of $40 for the next 2 years. If the interest rate is 3.25% per month, find: a) The cost of the stereo. b) The total amount of interest paid. I am having trouble figuring out the correct

    asked on April 3, 2015
  81. science

    Calculate the concentration of all species in a 0.145M solution of H2CO3

    asked on March 18, 2015
  82. Chemistry

    Oil and water don't mix. We say that oil is

    asked on March 14, 2015
  83. math

    3000 for 3 years at 1.8% compounded monthly

    asked on March 3, 2015
  84. 3rd grade math

    mrs. lens wants to put a ribbon around the edge of a pillow. which tool and unit should she use to measure the perimeter of the pillow? measuring tape or ruler or yard stick?

    asked on February 17, 2015
  85. Calculus II

    Find the indefinite integral. ∫xe^-4xdx

    asked on February 4, 2015
  86. Science

    A sample of steam with a mass of 0.530g and at a temperature of 100 ∘C condenses into an insulated container holding 4.40g of water at 5.0∘C.( ΔH∘vap=40.7 kJ/mol, Cwater=4.18 J/g⋅∘C). What is the final temperature of the mixture, assuming no

    asked on January 20, 2015
  87. maths

    I am fraction they say i m nt proper i may be improper but when u solve me u get number seven my number is 21.wht fraction am i?

    asked on December 25, 2014
  88. physics

    A helicopter flies south at 185km/hr relative to the ground. The wind is blowing 60km/hr to the west compared to the ground. What is the helicopter's speed to an observer on the ground?

    asked on December 12, 2014
  89. Math

    Ken planted 8 flowers and 4 shrubs in his mother's garden. He ran out of fertilizer before he planted 2 of the flowers and 1 of the shrubs, so he planted them without fertilizer. What percentage of plants were planted without fertilizer? A. 12.5% B.25% C.

    asked on December 10, 2014
  90. physics

    A student fires a rocket at 24 degrees above the horizontal. The 10kg rocket comes out of the gun barrel at 1000 m/s, and accelerates 15 m/s^2 uniformly until it burns out 2 seconds later. It then is acted apon by gravity until it hits the ground. I need

    asked on November 20, 2014
  91. Chemistry (urgent)

    1.Using Nerst, find the E of the cell for the dicromate redox system: A.under standard conditions. B.under neutral solutions instead of acid solutions. 2.Use Nerst and the hydrogen half equation to obtain an expression for pH.

    asked on October 29, 2014
  92. Chemistry

    1.Using Nerst, find the E of the cell for the dicromate redox system: A.under standard conditions. B.under neutral solutions instead of acid solutions. 2.Use Nerst and the hydrogen half equation to obtain an expression for pH.

    asked on October 29, 2014
  93. math

    How many packs of DVDs can you buy with 198 dollars if one pack costs 18 dollars

    asked on October 23, 2014
  94. Chemistry (urgent)

    Hydrolysis of a compound A, C7H6cl2 was carried out by refluxing with excess potassium hydroxide solution. the resulting solution was acidified with dilute HNO3 acid and excess silver nitrate was added to precipitate the chloride ions as silver chloride.

    asked on October 23, 2014
  95. sixth grade math

    3 3/5 * 5/6 = 90/45 Do I have correct answer?

    asked on September 24, 2014
  96. sixth grade math

    Multiply. Write each product in simplest form. 1. 2 3/8 * 1 3/5 = 3 4/5 2. 1 5/6 * 2/3 = 11/10 3. 7/8 * 3 1/3 = 35/27 Do I have the correct answers? If not can someone show how to solve them?

    asked on September 17, 2014
  97. sixth grade math

    Multiply. Write each product in simplest form. 1. 2 3/8 * 1 3/5 = 3 4/5 2. 1 1/5 * 3/5 = 18/25 3. 1 5/6 * 2/3 = 11/10 Do I have the correct answers? If not can someone show me how to solve them?

    asked on September 17, 2014
  98. Math

    What is the sum of all the positive numbers smaller than 100,000 where all digits can only be 1 or 0.

    asked on September 11, 2014
  99. chemistry

    How many grams of glycolic acid are needed to react with 30 mL of 0.1 M NaOH?

    asked on July 2, 2014
  100. math

    is 100 over 1000 10%?

    asked on April 27, 2014

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