Popular questions and responses by Miranda
  1. Chemistry

    1. Tube # 3: (a) It started out as purple, and turned into green. (b) No precipitate was noticably formed. Tube #4: (a) This tube was purple, and turned into white. (b) A brown precipitate was formed after adding 1 mL of NaHSO3. Tube #5: (a) This tube was

    asked on March 28, 2012
  2. chemistry

    For the exothermic reaction PCl3(g)+Cl2(g)⇌PCl5(g) K = 0.160 at a certain temperature. A flask is charged with 0.507 bar PCl3 , 0.507 bar Cl2, and 0.304 bar PCl5 at this temperature. What are the equilibrium partial pressures of PCl3 , Cl2, and PCl5,

    asked on February 5, 2018
  3. algebra

    Peter has 800 yards of fencing to enclose a rectangular area. Find the dimensions of the rectangle that maximize the enclosed area. What is the maximum​ area?

    asked on June 30, 2017
  4. painting

    28. Van Gogh’s painting Starry Night measures 92 cm long by 73 cm high. You buy a poster that shows an enlargement of the painting. The poster measures 120 cm long by 100 cm high. Is the poster an accurate representation of the painting? (Hint: Is the

    asked on December 29, 2010
  5. math

    What is the opposite of a professional eater? 12 spaces, letters- H O S M G C R I E B V W X A L N

    asked on September 22, 2011
  6. Physics

    you toss a racquetball directly upward and then catch it at the same height you released it 1.90 s later. Assume air resistance is negligible.What is the acceleration of the ball while it is moving upward?What is the acceleration of the ball while it is

    asked on September 1, 2016
  7. maximizing profit

    A manufacture has been selling 1750 television sets a week at $540 each. A market survey indicates that for each $14 rebate offered to a buyer, the number of sets sold will increase by 140 per week. a) Find the function representing the demand p(x), where

    asked on March 14, 2009
  8. Physics

    a rubber ball is thrown downwards off a balcony. after it travels 55m it has a speed of 46.5m/s. what is the initial velocity

    asked on October 10, 2013
  9. Chemistry

    Calculate the standard enthalpy change for the reaction 2A+B⇌2C+2D Use the following data: Substance ΔH∘f (kJ/mol) A -251 B -403 C 213 D -511 My thoughts: [(2)(-511)+(213)(2)]-[(2)(-251)+(-403)]=309kJ (but apparently that is not the correct answer)

    asked on November 15, 2015
  10. Algebra

    The function h is defined by h(x)=x^(2)-x. Find h(2x).

    asked on May 17, 2011
  11. Math

    A factory produces fuses, which are packaged in boxes of 16. Three fuses are selected at random from each box for inspection. The box is rejected if at least one of the three fuses is defective. What is the probability that a box containing six defective

    asked on July 10, 2014
  12. Statistics

    The probability that a university graduate will be offered no jobs within a month of graduation is estimated to be 5%. The probability of receiving one, two, and three job offers has similarly been estimated to be 37%, 27%, and 31%. Determine the following

    asked on May 19, 2010
  13. Math

    Conrad taxi service charges $1.50 for the first mile and $0.90 for each additional mile. How far can Mr. Kulp go for $20 if he gives the driver a $2 tip. Write a let statement; represent the additional miles in terms of the total travelled. Write an

    asked on September 13, 2012
  14. Chem (conversions)

    How do you convert? (a) 72 F to C and K (b) -12 C to F and K (c) 178 K to and C

    asked on October 16, 2011
  15. math

    Lucy's employer pays 70% of the total cost of her family's health insurance plan, while Lucy pays the rest. If the total cost of the plan will increase from $450 per month to $650 per month, how much more will Lucy have to pay each month?

    asked on January 26, 2016
  16. Math

    Casey paid $45 for one new tire and one used tyre for his bicycle. The new tire costs $17 more than the used tire. How much did the new tire cost? I have worked out the answer in my head, ($31) but is there a particular formula I can use or follow.

    asked on May 31, 2012
  17. algebra

    Put the equation in the form ax2 + bx + c = 0. Enter exponents using the caret ( ^ ). For example, you would enter 4x2 as 4x^2. 8-2x2=(x+2)2-7

    asked on April 17, 2011
  18. ELA

    "The Enlightenment and the Scientific Revolution were twin explosions in thinking that made the 17th and 18th centuries one of the most exciting and dynamic eras in European history. People cam to believe the power of human reason apart from the guidance

    asked on November 18, 2016
  19. geometry

    I tired but answers don't make since. Problem is segment CD is perpendicular bisector of segment AB. Need to find lengths of AC (9y-6), AD (3x), and AE ((5x +6). Others: BE=(5x+ y), BD (x + 10) and CB (7y). Figure like a kite. HELPPPPPPPPPP.

    asked on April 15, 2015
  20. Chemistry

    The thermochemical equation which is associated with ∆H°f, the standard enthalpy of formation, for urea, CO(NH2)2 (s), is: CO (g) + 2NH3 (g) --> CO(NH2)2 (s) + H2 (g) CO (g) + 2H2 (g) + N2 (g) --> CO(NH2)2 (s) C (s) + O (g) + N2 (g) + 2H2 (g) -->

    asked on March 27, 2015
  21. Physics

    A ball rolling down a hill was displaced at 19.6m while uniformly accelerating from rest. If the final velocity was 5.00 m/s what was the rate of acceptation?

    asked on October 10, 2013
  22. chemistry

    what is the following reaction? HNO3(aq) + KOH(aq) ---> KNO3(aq) + H2O(l)

    asked on June 21, 2011
  23. Geometry

    Polygon ABCD has vertices A(–4, 0), B(–2, 4), C(3, 4), and D(8, 0). Polygon A'B'C'D' is the dilation image of ABCD, using the center (0, 0) and a scale factor of 0.5. What are the coordinates of A', B', C', and D'? This question has me confused. Could

    asked on May 23, 2011
  24. Algebra

    Use the Factor Theorem to determine whether x+2 is a factor of P(x)=2x^4+x^3-3x-9. Specifically, evaluate P at the proper value, and then determine whether x+2 is a factor. P(__)= x+2 is or is not a factor of P(x)____

    asked on May 17, 2011

    How much energy would it take to warm 30.0 g of water at 35 oC to the boiling point and boil all the liquid away?

    asked on December 16, 2010
  26. Math

    The weight W of an object varies inversely as the square of the distance d from the center of the earth. At sea level (3978 mi from the center of the earth), an astronaut weights is 110lb. Find her weight when she is 459 mi above the surface of the earth

    asked on May 12, 2009
  27. Chemistry

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

    asked on February 19, 2017
  28. Algebra

    factor the following quadratic expressions, if possible. k^2-12k+20 6x^2 + 17x - 14

    asked on February 15, 2017
  29. science (ASAP)

    identify the terms or phrases that are paired together correctly a. deserts and dwarf trees b. temperate and deciduous forest and evergreen trees c. subarctic taiga and moss d. tundra and permafrost ***

    asked on January 19, 2017
  30. social studies

    (PLEASE HELP) from where did Islam spread? a. from India to Arabia b. From the persain empire to the arab emirates c. from macedonia with alexander the great d. from mecca and medina through arabia

    asked on January 17, 2017
  31. math

    Find two mixed numbers that up to 16 but have a difference of 5???

    asked on January 4, 2016
  32. math

    find all solutions in the interval [0,360degrees) sin(5x)=0

    asked on December 6, 2015
  33. Trigonometry

    two pulleys of a car engine radius of 8 cm and 5 cm respectively are connected by a belt. The larger pulley rotates 80 times per minute. Find the angular velocity of each pulley in radians per minute.

    asked on November 10, 2015
  34. Algebra

    Gustav’s father is seven times as old as he is. A year ago, he was nine times as old as Gustav. Find Gustav’s present age.

    asked on January 21, 2014
  35. poetry

    What is the authors tone in the poem arithmetic?

    asked on March 4, 2013
  36. Physics

    A 4.90-kg ball, moving to the right at a velocity of +2.50 m/s on a frictionless table, collides head-on with a stationary 8.00-kg ball. Find the final velocities of the balls if the collision meet the following conditions. (a) elastic 4.9-kg ball = 8-kg

    asked on January 13, 2013
  37. physics

    Engineers are developing new types of guns that might someday be used to launch satellites as if they were bullets. One such gun can give a small object a velocity of 2.9 km/s, moving it through only 1.6 cm. (a) What acceleration does the gun give this

    asked on October 23, 2012
  38. Chem (last question, I promise)

    You measure one edge of a cube using a meter stick marked in centimeters. Unfortunately, the edge is longer than 1 m. You mark the 1-m point on the cube edge with a pen and then, using a 15-cm ruler marked in millimeters, measure the remaining distance to

    asked on October 16, 2011
  39. Chem

    How do you convert? (a) 4.50 Cal to calories (b) 600.0 Cal to kilojoules (c) 1.000 J to calories (d) 50.0 Cal to joules

    asked on October 16, 2011
  40. Geometry

    How do you find the measurements of two opposite sides of a rectangle when given x+10=2x+8?

    asked on August 8, 2011
  41. enhancing children's self esteem

    5. Of the following who is the most important influence on childrens referent thought? a. Friends b. Teachers c. Themselves d. Family 6. Most often during adolescense, a child is least likely to approach which of the following for support of his or her

    asked on May 8, 2011
  42. algebra

    given a mean of 8 and a standard deviation of 0.7 what is the z-score of the value 9 rounded to the nearest tenth

    asked on February 7, 2011
  43. 9th grade science

    where are the cell and plasma membranes located

    asked on December 16, 2010
  44. algerbra 1

    Antartica comprises about 10.5% of the total land area on earth. antartica has a surface area of about 5,400,000 square miles. what is the total land area on earth? write an equation and slove.

    asked on September 26, 2010
  45. 9th grade

    1/9=a/a+24 I don't get this plez someone HELP

    asked on September 26, 2010
  46. trig

    Solve for all real values of x 3cos2x - 5cosx = 1

    asked on August 12, 2010
  47. geometry

    State the negation of the following statement: Lines a and b are parallel.

    asked on February 21, 2010
  48. geometry

    State the negation of the following statement: It is cloudy.

    asked on February 21, 2010
  49. geo

    List the set of all even numbers between 2 and 10, inclusive.

    asked on February 4, 2010
  50. Social Studies

    On a worksheet I have to do, I need a few details about how the Royal Road (in ancient Persia) helped unite the Persian Empire. I have a few things, but I need some more. Answers?

    asked on January 11, 2010
  51. Evaluating elasticity

    The demand function for a certain item is x = 35(sqrt(32-p^2)) ---Evaluate the elasticity at 5. E(5)= I don't know how to find elasticity, so i don't know how to start this problem. If someone could explain elasticity i think that i could figure it out.

    asked on March 14, 2009
  52. Geometry

    How do you find equations for medians

    asked on January 3, 2008
  53. math

    what is 100*500

    asked on August 30, 2007
  54. Math

    There are 18 animals in the barnyard. There are 50 legs. How many cows and how many chickens are there in the barnyard? Technically, I wonder if a chicken is an animal. And are chickens and cows the ONLY "animals" in the barnyard. If we assume a chicken is

    asked on November 27, 2006
  55. Psychology Question

    Which of the following situations involves a self-fulfilling prophecy? 1.Andy is hungry, so he makes himself a tuna fish sandwich. 2.Cheryl goes into her psychology exam convinced that she will fail, and she does. 3.Danielle is very smart, so her parents

    asked on October 30, 2006
  56. Math

    The angle measures of a triangle are 2x+5 degrees, 6x-5 degrees, and 7x degrees. What is the value of x? X=10. X=12. X=15. X=29.

    asked on April 1, 2020
  57. pre-algebra

    wyatt invests $6000 in two accounts, the first pays 10 percent simple interest, the second pays 11 percent simple interest. At the end of the year he has earned $640 in interest. How much is invested at each rate?

    asked on October 19, 2019
  58. math

    kim has 1/2 cup of almonds, she uses 1/8 cup of almonds to make a batch of pancakes. How many batches of pancakes can kim make with a 1/2 cup of almonds?

    asked on July 24, 2019
  59. math

    Ms. Sue please help me, The distance between morristown and bellington is 4 inches on a map. If the scale on the map is 1 inch = 25 miles, what is the actual distance between the two towns?

    asked on February 11, 2019
  60. physics

    A 570-g squirrel with a surface area of 900 cm2 falls from a 4.0-m tree to the ground. Estimate its terminal velocity. (Use the drag coefficient for a horizontal skydiver. Assume that the cross-sectional area of the squirrel can be approximated as a

    asked on December 3, 2018
  61. Chem

    Please someone Help!! Acetic acid, CH3COOH, is a weak organic acid, pKa 4.47. Determine the position of the equilibrium for the reaction of acetic acid with NaHCO3, and draw the species that predominates at equilibrium.

    asked on May 30, 2018
  62. Chemistry

    Describe how to make 20 mL of a 6.0 % solution from a stock solution with a concentration of 10 %.

    asked on February 5, 2018
  63. Math

    Valentina purchased 200 beads for $48 if she needs to buy 25 more beads how much will she pay if charged the same rate

    asked on November 8, 2017
  64. Chemistry

    How many grams of KI must be added to a 250-ml volumetric flask to prepare a water solution that is 0.100 M in potassium iodide?

    asked on March 14, 2017
  65. Math

    The dressmaker has 3/8 yard of fabric. She needs a total of 3/4 yard for a vest. How much more fabric does she need?

    asked on January 24, 2017
  66. science (ASAP)

    what does the notation TT mean to genetics

    asked on November 29, 2016
  67. math

    plss help equation for this statement the distance D travelled by a car varies directly as its speed s

    asked on November 27, 2016
  68. math help

    Question 1: Robby wants a secured loan to start his own business. Robby will use his house as collateral. The bank will loan Robby 56.4% of his house's equity. Robby's house is worth $367 685. He owes $108 653 on it. What is the equity in Robby's house?

    asked on March 18, 2016
  69. Math (Grade 12)

    Question 1: Robby wants a secured loan to start his own business. Robby will use his house as collateral. The bank will loan Robby 56.4% of his house's equity. Robby's house is worth $367 685. He owes $108 653 on it. What is the equity in Robby's house?

    asked on March 18, 2016
  70. Chemistry

    Underground miners formerly used headlamps in which calcium carbide (CaC2) was reacted with water to form acetylene (C2H2) gas as shown in the following reaction: CaC2(s) + H2O (l) ---> C2H2 (g) +Ca(OH2)(s) The acetylene produced was then burned to produce

    asked on May 3, 2015
  71. geometry

    figure of kite top pointed left. Tail is point E. Segment from AB perpendicular to CD. Top side of kite is AC, bottom side is CB. I figured it ==== AC 9y-6 = 7y; I got 3 for y. So, C = 21; for (x) I got 5x+18=5x + 15 (x) = 3. So AD IS 9. AE is 5x+6y=

    asked on April 16, 2015
  72. geometry

    I tried to figure this problem out, Did I do it correct? m

    asked on April 14, 2015
  73. math

    which mixture is more blue? 4gallons primer over 8 gallons paint or 3 gallons primer over 5 gallons paint

    asked on March 24, 2015
  74. math

    Clark is cooking a 12 pound ham. The ham needs to be cook 20 minutes for each pound. Clark wants to serve the ham at 5 p.m. What is the latest time he should place the ham in the oven.

    asked on September 14, 2014
  75. math

    Riley wants to raise $2550 for a fundraiser walk. He needs to ask people to pledge money for each mile that he walks. How many people will he need to get pledges from in order to reach his goal.

    asked on September 14, 2014
  76. math

    Complete the pattern 82,71,60,?,?

    asked on September 14, 2014
  77. math

    Complete the pattern 4,13,22,?, ?

    asked on September 14, 2014
  78. math

    you are ordering pizza for a party. One pizza serves 8 people. You are expect that there be 35 people. How many pizzas should you order.

    asked on September 14, 2014
  79. chemistry

    A 14.0 kg sample of lead is measured out at 4 degrees celcius what is the specific gravity of lead?

    asked on September 10, 2014
  80. math

    which numbers should you add to estimate the answer to this problem: 87,087 + 98.000 - 88,000+ 98,000 -85,000+95,000 - 87,000 +98,000 - 80,000+ 90,000 thanks for your help!

    asked on August 18, 2014
  81. chemistry

    What is the percent yield of NaCl if 31.0 g of CuCl2 reacts with excess NaNO3 to produce 21.2 g of NaCl?

    asked on February 20, 2014
  82. 7th grade English

    Use the correct pronoun in parentheses. The book ( it, itself) is a collector's item. Please help. Thanks.

    asked on December 5, 2013
  83. physics

    If my kinetic coefficient and static coefficient are both 1.02, how can I explain why they are the same???? (For a horizontal surface)

    asked on October 22, 2013
  84. Physics

    If the gravitational force between objects of equal mass is 2.30x10^-8 N when the objects are 10.0m apart, what is the mass of each object?

    asked on October 15, 2013
  85. Physics

    A projectile is fired off a 35m cliff at 18m/s. what horizontal distance does the projectile travel before hitting the ground?

    asked on October 10, 2013
  86. chemistry lab

    obtaining a smaller amount of sio2 than was present in the original sample

    asked on October 4, 2013
  87. chemistry lab

    list the possible manipulation errors that might contribute in obtaining a significantly larger amount of nacl than was present in original sample

    asked on October 4, 2013
  88. Science - physics

    Imagine you need to deliver a piano over three steps. A longer ramp translates into less force necessary to raise the piano's height than a shorter ramp would require. Calculate the percentage smaller a force would be required using an 2.8m long ramp

    asked on September 3, 2013
  89. American Goverment

    Despite their differences, the Founding Fathers all agreed that _____. democracy was the most important political value the Constitution should balance order, liberty, and popular sovereignty freedom must be protected at all costs a monarchy should be

    asked on August 24, 2013
  90. American Goverment

    Philadelphia, Pennsylvania was NOT _____. the location the 1787 Constitutional Convention. the city where the Declaration of Independence was signed the childhood home of Thomas Jefferson and John Adams an important city in colonial America 22. For the

    asked on August 24, 2013
  91. chemistry

    The H3o+ concentration of a solution is found to e 3.40*10^-6. What is the pH of the solution? what is the H3O+ concentration? what is the OH- concentration? is this and acidor a base?

    asked on June 6, 2013
  92. chemistry

    If 37.0 mL of HCl is used to neutralize 25.0 mL of 0.09345M LiOH. What is the concentration of the acid

    asked on June 6, 2013
  93. chemistry

    If 37.0 mL of HCl is used to neutralize 25.0 mL of 0.09345M LiOH. What is the concentration of the acid

    asked on June 6, 2013
  94. chemistry

    If 7.50 mL of 0.100M HCl is mixed with 12.5mL of NaOH. What is the concentration of the base

    asked on June 6, 2013
  95. Physical sciences

    What is the universal law?

    asked on March 21, 2013
  96. math

    the product of 16 and c is increased by 6 to equal the qoutient 25 and 9. what is c?

    asked on February 7, 2013
  97. physics

    A collision occurs between two pucks on an air-hockey table. Puck A has a mass of 0.020 kg and is moving along the x axis with a velocity of +5.5 m/s. It makes a collision with puck B, which has a mass of 0.040 kg and is initially at rest. The collision is

    asked on January 13, 2013
  98. Algebra 1

    So as I was doing me hw, I ran into this question, and I cant figure it out... Anyone wanna try? 7. The ratio of the perimeters of two triangles is 2:5. The perimeter of the larger triangle is 20 cm. What is the perimeter of the smaller triangle?

    asked on January 11, 2013
  99. Algebra 1

    Okay one last one that I've spent all night truing to figue out. 2. The width of a rectangle is 6 cm longer than its length. Its perimeter is more than 36 cm. Let l equal the length of the rectangle. a. for the width in terms of the length. W= l + 6=

    asked on January 11, 2013
  100. Algebra 1

    Okay. So I am completely lost with this... Any help would be great! 3. Solve the system using any method – graphing, substitution, or linear combination. Make sure to show your work. 2x + 5y= 8 x + 3y= 2

    asked on January 10, 2013


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