Popular questions and responses by randy
  1. Chemistry

    A selenium atom (Se) would form its most stable ion by the 1. loss of 2 electrons. 2. gain of 1 electron. 3. loss of 1 electron. 4. loss of 7 electrons. 5. gain of 2 electrons. Help please and tell me how you got the answer. Thanks!

    asked on October 29, 2009
  2. chemistry

    The conversion factor relating miles to meters is 1 mile= 1610m The speed of light is 3.00×10^8 m/s. How fast is this in miles per hour (miles/h \rm miles/h)?

    asked on September 8, 2013
  3. Algebra II

    if y varies directly as x, if y=80 when x=32, find x if y=100

    asked on March 22, 2012
  4. Math

    sec 7pi/4 without a calculator Find the exact answer

    asked on November 7, 2014
  5. math

    order the numbers from least to greatest. _ 1 4/5, 1.78, 1 5/6, 7/4, 1.7, 1 8/11 I am confused on going back and forth between decimals and fractions.

    asked on September 11, 2014
  6. algebra

    what is the slope of line that passes through (-3,-8) and (0,6)

    asked on May 25, 2011
  7. Physics

    Two horizontal forces, F1-> and F2-> , are acting on a box, but only F1->is shown in the drawing. F2-> can point either to the right or to the left. The box moves only along the x axis. There is no friction between the box and the surface. Suppose that

    asked on February 13, 2013
  8. math

    the absolute value of an integer is always greater than the integer. True or False?

    asked on January 27, 2012
  9. physics

    A jetliner can fly 5.57 hours on a full load of fuel. Without any wind it flies at a speed of 2.43 x 102 m/s. The plane is to make a round-trip by heading due west for a certain distance, turning around, and then heading due east for the return trip.

    asked on October 6, 2011
  10. Geometry

    How do you find the coordinates of the image of J (-7,-3) after the translation (x,y) (x-4,y+6)

    asked on September 14, 2015
  11. chemistry

    While in Europe, if you drive 105km per day, how much money would you spend on gas in one week if gas costs 1.10 euros per liter and your car's gas mileage is 22.0mi/gal? Assume that 1euro = 1.26 dollars.

    asked on September 8, 2013
  12. Physics

    To move a large crate across a rough floor, you push on it with a force at an angle of 21 below the horizontal, as shown in the figure. Find the acceleration of the crate if the applied force is 400 , the mass of the crate is 32 and the coefficient of

    asked on March 6, 2011
  13. Word Problem

    Assume that the mathematical model C(x) = 16x + 130 represents the cost C, in hundreds of dollars, for a certain manufacturer to produce x items. How many items x can be manufactured while keeping costs between $525,000 and $781,000? Thanks in advance!

    asked on February 18, 2009
  14. math

    How many thousands of people live in Boston ma.if population is 617,594

    asked on September 17, 2014
  15. physics

    A golfer hits a shot to a green that is elevated 3.0 m above the point where the ball is struck. The ball leaves the club at a speed of 16.8 m/s at an angle of 30.0¢ª above the horizontal. It rises to its maximum height and then falls down to the green.

    asked on October 6, 2011

    What are the odds in favor of drawing face card from an ordinary deck of cards? to

    asked on May 23, 2012
  17. Trig / Calc

    What angle (in degrees) corresponds to 18.96 rotations around the unit circle? Enter the exact decimal answer.

    asked on October 23, 2014

    The product of two consecutive positive even numbers is 528. What are the numbers? (Enter solutions from smallest to largest.) and

    asked on April 25, 2012
  19. physics

    A log is floating on swiftly moving water. A stone is dropped from rest from a 84-m-high bridge and lands on the log as it passes under the bridge. If the log moves with a constant speed of 3.6 m/s, what is the horizontal distance between the log and the

    asked on September 8, 2010
  20. physics

    a boy of mass 40kg and a girl of 30kg play on a see saw of negligible weight.if the boy sits 270cm from the pivot of the see-saw where must the girl sit to make it balance

    asked on February 8, 2015
  21. college

    what is ADE/CLR?

    asked on January 20, 2010
  22. chemistry

    A sprinter set a high school record in track and field, running 200.0 m in 20.9s . What is the average speed of the sprinter in kilometers per hour

    asked on September 8, 2013
  23. Statistics/Probability

    So I tried solving the first one and apparently failed miserably, attempted both twice and got it wrong each time and I have one submission attempt left, so any help is definitely appreciated! 1. Hotels R Us has kept the following recordes concerning the

    asked on May 21, 2014
  24. Pre-Cal

    Given that lim x-> f(x)=6 and that lim x-> g(x)= -4, evaluate the following limit. Assume that c is a constant. lim -2f(x) - 12 / g(x). x->. I did -2(6) - (12/-4) -12 - (-3) -12 + 3 -9

    asked on May 5, 2010
  25. 3rd grade

    The number with the most digits is always greatest. Do you agree? Explain. Explain how you use a hundred chart to subtract 12 from 46.

    asked on September 18, 2008
  26. Science

    Nathaniel is driving his sports car down a four lane highway at 40m/s. He comes up behind a slow moving dumptruck and decides to pass it in the left hand lane. If Nathaniel can accelerate at 5m/s^2, how long will it take for him to reach the speed of

    asked on January 14, 2013
  27. Math

    Search Results for "Ruth has some money in a savings account. after the bank adds 5% interest to her account , she has $126. How much was in her account before the interest was added" How do i write this in an equation?

    asked on September 3, 2013
  28. ECON 4346

    4-The three fundamental economic questions of what, how, and for whom: a-exist because of scarcity. b-are much more serious in a socialist system. c-are not serious in a capitalistic system. d-are not relevant in the industrialized world of today. 5-When

    asked on September 19, 2012

    Let U = {17, 18, 19, 20, 21, 22, 23}, B = {17, 20, 21, 23}, and C = {19, 20, 22, 23}. List all the members of the sets. (Enter solutions from smallest to largest. If there are any unused answer boxes, enter NONE in the last boxes.) B = C =

    asked on May 6, 2012
  30. physics

    In an historical movie, two knights on horseback start from rest 72.6 m apart and ride directly toward each other to do battle. Sir George's acceleration has a magnitude of 0.280 m/s2, while Sir Alfred's has a magnitude of 0.250 m/s2. Relative to Sir

    asked on October 3, 2011
  31. Physics

    When you push a 1.82-kg book resting on a tabletop, it takes 2.30 N to start the book sliding. Once it is sliding, however, it takes only 1.46 N to keep the book moving with constant speed. Q1. What is the coefficient of static friction between the book

    asked on March 7, 2011
  32. Economics

    Has the distribution of income in Canada become equal or more unequal?

    asked on July 26, 2010
  33. pre-cal

    Given that lim x->c f(x)=6 and that lim x->c g(x)= -4, evaluate the following limit. Assume that c is a constant. The x in front of the f is confusing me. lim [xf(x) + 3 g(x)]^2 x->c

    asked on May 8, 2010
  34. Chemistry

    What is the percent by mass of C in methyl acetate (C3H6O2)? The molecular weight of carbon is 12.0107 g/mol, of hydrogen 1.00794 g/mol, and of oxygen 15.9994 g/mol. Answer in units of %. Please work it out for me so I totally understand it. Thanks!

    asked on December 6, 2009
  35. Math

    please help how would i find the unit rate of $112 in 8 Hrs

    asked on January 9, 2008
  36. physics

    A ball is thrown straight upward and returns to the thrower's hand after 2.75 s in the air. A second ball thrown at an angle of 34.0° with the horizontal reaches the same maximum height as the first ball. (a) At what speed was the first ball thrown? ____

    asked on June 5, 2018
  37. Math

    Write whether the statement is true or false. If false write a true statement. 1. A right triangle has three right angles. False a right triangle has 1 right angle 2. A triangle that has three sides of the same length is an equilateral triangle. True

    asked on January 25, 2015
  38. Pre-Calculous (Trig)

    The Singapore Flyer, currently the world's largest Ferris wheel, completes one rotation every 37 minutes.1 Measuring 150 m in diameter, the Flyer is set atop a terminal building, with a total height of 165 m from the ground to the top of the wheel. When

    asked on October 17, 2014
  39. Physics

    Multiple-Concept Example 13 presents useful background for this problem. The cheetah is one of the fastest accelerating animals, for it can go from rest to 34.7 m/s in 3.03 s. If its mass is 102 kg, determine the average power developed by the cheetah

    asked on February 26, 2013
  40. chemistry

    the heat of fusion of water is 335 J/g. How much heat would be required to melt 97.8 g of ice

    asked on April 24, 2012

    6y + 11x = -9 (a) Solve the equation for y. (Do not use mixed numbers in your answer.) y =

    asked on April 11, 2012
  42. geometry

    The altitude of an equilateral triangle is 7 square root 3 units long. The length of one side of the triangle is ____ units. 7 14 14 square root 3 7 square root 3 over 2

    asked on January 17, 2012
  43. geometry

    Ray OX bisects angle AOC and angle AOX =42 degrees, angle AOC is: 42 degrees 84 degrees 21 degrees 68 degrees

    asked on January 17, 2012
  44. physics

    An automobile starts from rest and accelerates to a final velocity in two stages along a straight road. Each stage occupies the same amount of time. In stage 1, the magnitude of the car's acceleration is 2.03 m/s2. The magnitude of the car's velocity at

    asked on October 3, 2011
  45. Pre-cal

    Please determine the following limits if they exist. If the limit does not exist put DNE. lim 2+6x-3x^2 / (2x+1)^2 x-> - infinity lim 4n-3 / 3n^2+2 n-> infinity I did lim 2+6x-3x^2 / (2x+1)^2 x-> - infinity (2+6x-3x²)/(4x²+4x+1) (2/x² + 6/x -3)/(4 + 4/x

    asked on May 9, 2010
  46. Maths

    Determine the effective annual yield (annual percentage yield) for $1 invested for 1 year at 8.5% compounded monthly.

    asked on March 19, 2008
  47. Statistics

    Determine whether the following statements are true or false: 1. P(A and B)=P(B|A)P(B). 2. When A and B are independent, P(A)=P(B). 3. When A and B are independent, P(A|B)=P(A). 4. When A includes B, P(A|B)=1. 5. When B is the complement of A, P(A or B)=1.

    asked on May 22, 2014
  48. Statistics

    A box contains five numbered balls (1,2,2,3 and 4). We will randomly select two balls from the box (without replacement). (a) The outcome of interest is the number on each of the two balls we select. List the complete sample space of outcomes. (b) What is

    asked on March 12, 2013
  49. Physics

    In attempting to pass the puck to a teammate, a hockey player gives it an initial speed of 2.95 m/s. However, this speed is inadequate to compensate for the kinetic friction between the puck and the ice. As a result, the puck travels only one-half the

    asked on February 26, 2013
  50. Physics

    A space probe has two engines. Each generates the same amount of force when fired, and the directions of these forces can be independently adjusted. When the engines are fired simultaneously and each applies its force in the same direction, the probe,

    asked on February 13, 2013
  51. algebra

    sqrt(10a) + 5 sq. rt. (250a^2) add and sinplify

    asked on June 9, 2012

    Calculate the monthly finance charge for the following credit card transaction. Assume that it takes 10 days for a payment to be received and recorded and that the month is 30 days long. Assume 365 days in a year. (Round your answer to the nearest cent.)

    asked on May 6, 2012
  53. chemistry

    calculate the molarity of an acetic acid solution if 39.96 mL of the solution is needed to neutralize 136mL of 1.41 M sodium hydroxide. the equation for the reaction is HC2H3O2(aq) + NaOH(aq) > Na+(aq) + C2H3O2(aq) +H2O(aq)

    asked on April 29, 2012
  54. physics

    Show that for 1 kg of pure gold the volume of water displaced is 51.8 cm^3 I know that the density of pure gold is 19.32 gm/cm^3 so 1 kg/19.32 gm/cm^3= 0.05175 ? I have come along way with this problem and feel like I am close, but now I need help. How do

    asked on November 21, 2008
  55. science

    if a mack truck and a motorcycle have a head on collision which one is the impact force greater? and which one has the greatest change in its motion? This seems obvious that's why I am asking?

    asked on November 14, 2008
  56. MicroEconomics (please help)

    Can someone please help me with the following questions? thanks a lot 1. The cranberry market is perfectly competitive. Reports that consuming cranberries can lead to improved health result in a permanent increase in the demand for cranberries and an

    asked on December 10, 2006
  57. math

    What is (f+g)(x)? f(x)=x^2−36 g(x)=x^3+2x^2−10

    asked on April 9, 2018
  58. math

    The function ​f(x)​ is the number of feet below the surface of the water a diver is at x seconds. After 14 s, the diver reached the maximum distance of 22 ft below the surface of the water. The diver stayed in the water for 20 minutes. What is the

    asked on April 9, 2018
  59. math

    Which characteristic is correct for the function f(x)=−2x3+3x ? neither even nor odd even both even and odd odd

    asked on April 9, 2018
  60. Physics!!! HELP!!

    The carbon isotope 14C is used for carbon dating of objects. A 14C nucleus can change into a different kind of element, a neighbor on the periodic table with lower mass, by emitting a beta particle – an electron or positron – plus a neutrino or an

    asked on November 7, 2017
  61. Algebra

    I am so lost on these problems. Write a geometric sequence that starts with 3 and has a common ratio of 5. What is the 23rd term in the sequence. Write an arithmetic sequence that has a common difference of 4 and the eighth term is 13. What is the first

    asked on June 17, 2016
  62. chemistry

    The solubility of Na3(PO4) is 0.025 M. What is the Ksp of sodium phosphate?

    asked on November 11, 2015
  63. math

    Trail mix is sold in 1-pound bags. Mary will buy some trail mix and re-package it so that each of the 15 members of her hiking club gets one 25_ -pound bag. How many 1-pound bags of trail mix should Mary buy to have enough trail mix without leftovers?

    asked on May 11, 2014
  64. Physics

    A bicyclist rides 2.78 km due east, while the resistive force from the air has a magnitude of 6.52 N and points due west. The rider then turns around and rides 2.78 km due west, back to her starting point. The resistive force from the air on the return

    asked on February 26, 2013
  65. physics

    A tiger can run at approximately 100 km/hr (27.7 m/s) and a zebra at 80 km/hr (22.2 m/s). If both animals are running at full speed, with the zebra 70.0 m ahead, how long before the tiger catches its prey? a) 12.6 s b) 25.2 s c) 6.30 s d) 10.7 s

    asked on February 13, 2013
  66. math

    If pump A and pump B work together, they can fill a pool in 4 hours. Pump A, working alone, takes 6 hours to fill the pool. How long would it take pump B, working alone, to fill the pool?

    asked on January 31, 2013
  67. Science

    Please complete the formula and process in arriving the answer. Please. Thank you. Nathaniel is driving his sports car down a four lane highway at 40m/s. He comes up behind a slow moving dumptruck and decides to pass it in the left hand lane. If Nathaniel

    asked on January 14, 2013
  68. Algebra

    - There are less than 40 members of the Landowners Association. These memebers vote on various proposals. All the members were present at a meeting and all voted on each of two proposals. On the first proposal 4 times as many memebers voted yes to those

    asked on December 5, 2012
  69. Chemistry

    Help with lab report Need Help finishing my lab report.KNOWN VALUES ARE V OF HCL=50ML,M=2.188.V OF NAOH=55.3ML,M=2.088.INTIAL TEMP FOR HCL=22.5C,NAOH IS 23C.this is for part A: Mass of final NACL solution assuming that the density of a 1 M Nacl solution is

    asked on October 26, 2012
  70. algesebra

    Darla is buildig a new desk. To make sure she made a square corner, she measures 3ft. from the corner along one edge and 4ft. from the corner along the other edge. How long should the diagonal be between those two points if the corner is a right angle?

    asked on June 18, 2012
  71. Homework test

    An artifact was found and tested for its carbon-14 content. If 70% of the original carbon-14 was still present, what is its probable age (to the nearest 100 years)? Use that carbon-14 has a half-life of 5,730 years.

    asked on June 17, 2012
  72. algebra

    A sample of 134 firecrackers contained 6 duds. How many duds would you expect in a sample of 2,546?

    asked on June 3, 2012
  73. algebra

    There are approximately 4lbs of muscle for every 7lbs of body weight of a certain animal, how much of the weight is muscle?

    asked on June 1, 2012

    Find the amount of interest and the monthly payment for the loan. Purchase a car for $42,800 at 2.4% add-on rate for 5 years. (Round your answers to the nearest cent.)

    asked on May 6, 2012
  75. chemistry

    calculate the molarity of an acetic acid solution if 39.96 mL of the solution is needed to neutralize 136mL of 1.41 M sodium hydroxide. the equation for the reaction is HC2H3O2(aq) + NaOH(aq) > Na+(aq) + C2H3O2(aq) +H2O(aq)

    asked on April 29, 2012

    Consider the following expression. \(x + 2 y - 2 z\) - (x - 2 y + 2 z) (a) Simplify the expression.

    asked on April 25, 2012

    Find the functional values requested in the problem. h(x)=3 x-1 (a) h(0) = (b) h(-7) =

    asked on April 25, 2012

    Solve the exponential equation. Give the exact value for x. (Express all logarithmic functions in terms of ln(x) in your answer.) text((a) ) e^x = 10 x = text((b) ) e^x = 2.0 x = text((c) ) e^x = 37.9 x =

    asked on April 25, 2012

    Graph the equation. x = -6

    asked on April 25, 2012

    The velocity v (in feet per second) of a rock dropped into a well is related to time (in seconds) by the formula v = 32t. What is the velocity of the rock at the indicated instant? Write your answer in the form (t, v). (a) when the rock is released ( , )

    asked on April 25, 2012
  81. chemistry

    the heat of fusion water is335 J/g. The heat of evaporization of water is 2.26 kJ/g, the specific heat of ice is 2.05 J/Deg/g, the specific heat of steam is 2.08 J/deg/g and the specific heat of liquid water is 4.184 J/deg/g. How much heat would be needed

    asked on April 24, 2012

    Solve the equations. ((a) ) (2 L)/(5) = 2 L = ((b) ) 4 = (4 M)/4 + 8 M =

    asked on April 16, 2012

    Use the definition of logarithm to simplify each expression. (a) )log_(3b) \(3b\) ((b) )log_(8b) \((8b)^6\) (c) )log_(10b) \((10b)^(-13)\)

    asked on April 16, 2012

    Select all statements that are true. (log_b\(A\))/(log_b\(B\))=log_b\(A-B\) (If ) log_1.5\(8\)=x, text( then ) x**(1.5) =8. log\(500\) text( is the exponent on ) 10 text( that gives ) 500. text (In )log_b\(N\), text( the exponent is )N. text( If )

    asked on April 16, 2012

    A seismograph 300 km from the epicenter of an earthquake recorded a maximum amplitude of 5.4 multiplied by 102 µm. Find this earthquake's magnitude on the Richter scale. (Round your answer to the nearest tenth.)

    asked on April 16, 2012

    x2 - 5x + 5 = 0

    asked on April 11, 2012

    Let x = 1, y = 3. Find the value of the given capital letter. N = x**2 + 2 xy + y**2 + 3

    asked on April 11, 2012

    Find three ordered pairs that satisfy the equation. y = 5 x - 4 (0, ), (1, ), (2, )

    asked on April 10, 2012
  89. Trig.

    What is the trigonmetric fact for sin 3.14/8?

    asked on April 5, 2012
  90. math

    A student invests two sums of money at 3% and 4% interest, receiving a total of $110 in interest after 1 year. Twice as much money is invested at 4% than at 3%. Find the amount invested at each interest rate. Where do I even begin with this?

    asked on March 13, 2012
  91. math - integers

    5. Robert, a real estate agent, drove 170 kms north from his home. The following day, he drove 54 kilometers south. How far and in what direction did he have to drive to get back home?

    asked on February 7, 2012
  92. math - integers

    1. Freddy lives 34kms south of Makati City while Misael lives 34kms north of Makati City. How far is Freddy's place from Misael's place?

    asked on February 7, 2012
  93. math

    what is the length of a diagonal of a square whose side measures 6cm.?

    asked on January 28, 2012
  94. math

    Ray OX bisects angle AOC and angle AOX =42 degrees, angle AOC is: 42 degrees 84 degrees 21 degrees 68 degrees

    asked on January 16, 2012
  95. Biology

    the biome with the fewest seasonal changes is?

    asked on October 29, 2011
  96. physics

    An airplane with a speed of 85.1 m/s is climbing upward at an angle of 54.4 ° with respect to the horizontal. When the plane's altitude is 759 m, the pilot releases a package. (a) Calculate the distance along the ground, measured from a point directly

    asked on October 6, 2011
  97. physics

    Relative to the ground, a car has a velocity of 14.4 m/s, directed due north. Relative to this car, a truck has a velocity of 24.8 m/s, directed 52.0° north of east. What is the magnitude of the truck's velocity relative to the ground?

    asked on October 6, 2011
  98. physics

    A speedboat starts from rest and accelerates at +1.68 m/s2 for 5.43 s. At the end of this time, the boat continues for an additional 8.16 s with an acceleration of +0.475 m/s2. Following this, the boat accelerates at -0.866 m/s2 for 7.54 s. (a) What is the

    asked on October 3, 2011
  99. life orientation

    critically discuss 5 ways in which the human or enrimental problem impacts on the community within south africa

    asked on June 12, 2011
  100. Kinematics

    A car has an acceleration of 2 m/s2. What is its speed 3 seconds after it starts moving?

    asked on February 1, 2011


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