Newest questions and responses by frank
  1. Physics

    During a parachute jump, the person is initially in free fall and then the parachute is opened. While in free fall, there are two forces acting on the jumper-gravity and air fraction. The faster the jumper is at falling, the more air friction there is. At

    asked on October 29, 2018
  2. Math-Ms sue

    Need Help with my final 2 questions can someone please help What is the additive inverse of 38? A –38 B. 38 C -(- -39) D. -(-(-(-38))) Which property is shown by –6+0= -6 Commutative property of addition identity property of addition Distributive

    asked on September 5, 2018
  3. Math- Ms Sue

    Hey Ms. Sue I was doing my test then i got stuck on this question can you help me out please thanks. What is the difference between |-3 | and -3?

    asked on September 5, 2018
  4. History

    Which mostaccurately characterizes the Eisenhower era? It was a time of economic sluggishness and social unrest, as Communist protest groups grew in influence. It was a decade of economic recession and hard times for Americans, but industrial expansion in

    asked on August 18, 2018
  5. physics

    A body is projected at an angle of 30 degree with the horizontal at initial speed of 200m/s. In how many seconds will it reach the ground? How far from the point of projection will it strike?

    asked on August 14, 2018
  6. social studies

    What happened as a result of a meeting between A. Phillip Randolph and Franklin Roosevelt? a. The employment of skilled African American workers doubled*** b. African Americans threatened a march on Washington, D.C. to protest discrimination c. Roosevelt

    asked on May 31, 2018
  7. history

    Why was military leadership allowed to take control of Japan after World War I A) Japan wanted to continue fighting the war to gain additional land. B) Japan feared communism and vowed to keep it out of the country. C) Military leaders stepped in to regain

    asked on May 31, 2018
  8. algebra

    Solve the equation using the zero-product property. -9n(5n-5) a. -1/9, 1 b. 0,1***** c. -1/9,-1 d. 0,-1 Use the quadratic formula to solve the equation. if necessary, round to the nearest hundredth. x^2-6=x a. x=2,3 b. x=-2,3 ***** c. x=2,-3 d. x=-2,-3 How

    asked on May 14, 2018
  9. math

    simplify (7)/(2a)*5/(a^2) a. 35/(2a^2); where a ≠ 0 b. 35/(2a^2) i know the answer is one of these two and not c or d, but im not sure if its a or b

    asked on May 14, 2018
  10. math

    divide. (12t^6 - 8t^8) ÷ (2t^3) a. 6t^3 - 8t^8 b. 12t^6 - 4t^5 c. 6t^2 - 8t^4 d. 6t^3 - 4t^5

    asked on May 14, 2018
  11. algebra

    parallel lines have ____ slopes. same?? perpendicular lines have ____ slopes. ??

    asked on December 21, 2017
  12. History

    Which option accurately describes how the philosophy of humanism impacted the Spanish Inquisition? A. Catholic and Protestant inquisitors combined forces using humanist philosophy as a backbone to justify persecuting Muslims. B. Humanist philosopher

    asked on December 3, 2017
  13. history

    Which option accurately describes Martin Luther’s influence on the Protestant church? A. Under Luther’s recommendation, Protestant clergy members were to be known as Imam, Sheik, or Mullah. B. Under Luther’s leadership, Catholic clergy members led

    asked on December 3, 2017
  14. World History

    Which option most accurately explains the shift toward humanist thought on people’s self-perceptions during the Renaissance? A.People who embraced humanist thought practiced flagellantism (whipped themselves with a belt) to repent for their sins.

    asked on December 1, 2017
  15. Math

    A city park employee collected 600 cents in nickels, dimes, and quarters at the bottom of the wishing well. There were 10 nickels, and a combined total of 25 dimes and quarters. How many dimes and quarters were at the bottom of the well?

    asked on June 4, 2017
  16. Physics

    a) Why do you think our eyes fail to see object clearly at varous distances? b) (i) Explain how image of an object is formed in the human eye (ii) What are ciliary muscles? Explain the function of these muscles c) Discuss the similarities and differences

    asked on May 31, 2017
  17. Physics

    A 0.5kg ball dropped from a height of 2.4 m above the floor. if an impact with the floor it loses 3 joules of energy, how high will it bounce?

    asked on May 31, 2017
  18. ICD-10 coding

    A patient with known carcinoma of the pancreatic head is admitted with a Hgb of 9.1. She has been receiving Docetaxel chemotherapy and the physician diagnosed this new anemia as an adverse effect of the chemoterapy. The patient is treated with darbepoetin

    asked on May 27, 2017
  19. math

    a lorry tank was 3/5 full of petrol , 21 liters was added and it is now 5/6 full. how many liters of petrol can the tank hold

    asked on May 15, 2017
  20. Math

    Three circles which touch each other externally with the center of the circles at A, B, C form a triangle with size of 9cm, 7cm, 6cm.calculate the radii of the circle

    asked on May 8, 2017
  21. AP Chem

    Write the overall net-ionic reaction that occurs when iron (ii) hydroxide (Fe(OH)2, Ksp = 7.9 x 10^-15) is dissolved in a 0.500 M sodium cyanide solution forming a complex ion. (Fe(CN)6^4-, Kf = 7.7 x 10^36) Determine the value of the equilibrium constant

    asked on March 27, 2017
  22. social studies

    Which of these events during the Age of Exploration was a cause of the other three? A) warfare increased as European nations competed for land and power B) advances in learning and technology made long ocean voyages possible C) Europeans brought food,

    asked on March 5, 2017
  23. math

    How long will it take an 8% simple interest rate for $850 to amount to $1000?

    asked on December 1, 2016
  24. Math (Geometry)

    Linerar Equations Hourly rate of $8.00 an hour for a guaranteed 40 hours

    asked on November 30, 2016
  25. Chemistry

    Hi, wondering if anyone can help with the following problem: A solution of NH3 (kb=1.8x10^-5) has a ph of 11. what is the molar concentration of NAOH? I am unsure how to go about this however i have tried [10^-3][10^-11]/ 1.8x10^-5 with no success. Thanks

    asked on November 28, 2016
  26. algebra

    The sum of three numbers is 82. One of the numbers is 9 more than one of the others. Represent the numbers in terms of one variable.

    asked on November 21, 2016
  27. math

    A chemist test involves measuring two independent quantities A and B, the expressing the results of the test as C such that C= 3A-0.5B. Give that A is normally distributed with mean 10 and standard deviation of 1, and B is also normally distributed with

    asked on November 17, 2016
  28. Maximal area and dimensions of a window

    Hey Jiskha, came across this problem in my maths homework and I can't seem to solve it. Can someone maybe help me out? A Norman window has the shape of a rectangle with a semi circle on top; diameter of the semicircle exactly matches the width of the

    asked on November 14, 2016
  29. math

    Hi guys, I am really stuck with this problem, maybe somebody could help me out. A rancher has 2100 feet of fencing with which to construct adjacent, equally sized rectangular pens as shown in the figure above. What dimensions should these pens have to

    asked on November 14, 2016
  30. Finite math

    A bank account pays interest at 12% compounded monthly, and has a monthly fee of $10, deducted at the end of each month. If $13,000 is deposited on January 1, 2013, how much is in the account on January 1, 2016? I have done some question related to

    asked on November 10, 2016
  31. Physics

    The density of copper is 9.8×10^3 and the density of gold is1.9×10^4. When the two wires of these two metals are held under the same tension the speed in the gold wire is found to be half of that of the copper. What is the ratio of the diameters of the

    asked on October 7, 2016
  32. C++

    // Program: name of program // Author: your name // Date Written: date you began writing the program /* Abstract: Brief description of the program */ Include in-line comments in the body of your program. You can convert temperature from degrees Celsius to

    asked on September 24, 2016
  33. Math

    This is a cross product problem: Given uxv= find (u-5v)x(u+4v) I appreciate your help Thank you!

    asked on September 13, 2016
  34. Math

    1. what is the solution of 87 + (-396)? A 183** B -183 C 9 D -9 2. Evaluate: -12 x 3 =? A 36 B -36** C 4 D -4 3. Evaluate: -20 ÷ -10 =? A 200 B -200 C 2 D -2*** 4. Select all the problems that have a solution that is negative. -8 + 10 = ? 8 x (-2) +? -4

    asked on September 11, 2016
  35. Physics 11

    A mass of 10 kg, initially at rest on a horizontal frictionless surface, is acted upon by a horizontal force of 25 N. The speed of the mass after it has moved 5.0 m is: . a)  5.0 m/s 
 . b)  10 m/s 
 . c)  15m/s 
 . d)  125 m/s 
 . e)  250 m/s

    asked on August 15, 2016
  36. Econ

    Please help me and review my answers for my quiz. Let me know which ones you believe to be right and wrong. 1. When P = AR = MR = AC = MC: X economic profits are positive. economic profits are zero. economic profits are negative. normal profits are zero.

    asked on July 10, 2016
  37. Economics

    The Southern Tree Trimming Corporation reported an accounting profit of $35,000 and a normal rate of return of 15 percent on capital and enterprise of $30,000. The opportunity cost of labor is $15,500. What is the economic profit? $110,500 X $19,500

    asked on July 3, 2016
  38. physics

    A spinal spring,loaded with a piece of metal,extends by 10.5cm in air.When the metal is fully submerged in water,the spring extends by 6.8cm.Calculate the relative density of the metal using Hooke's law

    asked on June 6, 2016
  39. Math

    (4x^2 - 2x-1) - (-3x^3 + 2)

    asked on May 31, 2016
  40. Math

    Many has two boxes one contains 10 colored pencils 4 of witch are red and 6 which are green the other box onther box contains 7 markers and which 4 are red and 3 are blue what's the probability of of many choosing green green pencil and red marker

    asked on May 30, 2016
  41. Biomechanics/Physics

    A 125 pound female is late for her biomechanics final and after arriving dashes up 40 steps each 15cm high in 1.65 seconds to take a seat and start the test. Hint: 1 lb = 4.47N How much work did she perform running up the steps?

    asked on May 8, 2016
  42. Government

    What are the three methods special interests groups might use to win favorable votes form legislators ?

    asked on April 26, 2016
  43. math

    Let a be -1/6 and let b be 1/2. Let x be the sum of the reciprocals of a and b, let y be the product of the reciprocals of a and b, and let z be twice the reciprocal of a divided by the reciprocal of b. Calculate x+y+z.

    asked on April 19, 2016
  44. math

    I took a test today that had 50 questions I needed 70 percent to pass I missed 10 questions what is my percent?

    asked on March 23, 2016
  45. History

    what was the Rhode Island connection with the cotton gin?

    asked on February 29, 2016
  46. Pre-Calculus

    An investor has $100,000 to invest in three types of bonds: short-term, intermediate-term, and long-term.How much should she invest in each type to satisfy the given conditions? Short-term bonds pay 4% annually, intermediate-term bonds pay 5%, and

    asked on February 29, 2016
  47. Can you check an answer for me?

    There is a jar with 16 marbles. 4 are red, 7 are blue, and 5 are green. You select two marble at random. One marble is drawn and not replaced. Then a second marble is drawn. What is the probability of selecting a red marble and then another red marble? a.

    asked on February 20, 2016
  48. Please help me on math, thanks!

    If no digit may be used more than once, how many 2-digit numbers can be formed using only the digits 5, 6, 3, and 2? 11 12 10 2

    asked on February 20, 2016
  49. History

    3.)Which of the following are possible results of the Monroe Doctrine? A.)Native Americans are forced off their lands in the West. B.)More Americans move westward seeking gold and riches. C.)The U.S. stops a Spanish ship from entering Florida waters.

    asked on January 31, 2016
  50. Physics

    An airplane has a velocity of 580 km/h relative to the moving air. At the same time, a wind blows northward with a speed of 92 km/h relative to earth. The airplane is moving in an easterly direction relative to earth. Find the speed of the airplane to

    asked on January 25, 2016
  51. Math

    My math problem says seven tenths exceeds seven thousandths by what number. Do I subtract like this: 0.007 - 0.7

    asked on January 24, 2016
  52. MATH

    In a drawer Richard has 5 pairs of gloves. Each pair has a different color. On Day 1 Richard selects two individual gloves at random from the 10 gloves in the drawer. On Day 2 Richard selects 2 of the remaining 8 gloves at random and on Day 3 two of the

    asked on January 20, 2016
  53. Theory of interest

    An annuity last for 12 calendar years.At the end of each quarter,there is a payment.First quarter payment are $200,second quarter payments are $300,third quarter payments are $150 and fourth quarter payments are $400.Find the accumulated value of this

    asked on December 16, 2015
  54. Theory of interest

    An annuit last for 12 calendar years.Atthe end of each quarter,there isa payment.First quarter paynments are $200,second quarter payments are $300,third quarter payments are $150 and fourth quarter payments ate $400.Find the accumulated value of this

    asked on December 15, 2015
  55. Theory of interest

    An annuity last for 12 calendar years.At the end of each quarter,there is a payment.First quarter payments are $200,second quarter payments are $300,third quarter payments are$150 and fourth quarter payments are $400.Find the accumulated value of this

    asked on December 15, 2015
  56. chemistry

    a solution is known to contain Cl, NO3, NO2, and SO4 ions. which of these ions can be positively identified?

    asked on November 8, 2015
  57. chemistry

    why wouldn't HCl be a good acid to use to determine the solubility of a silver precipitate in acid soulution?

    asked on November 8, 2015
  58. Maths

    In an exam a student scored 60 marks out of a possible 80. What percentage is this

    asked on November 1, 2015
  59. Principles of Finance

    Warmack Machine Shop is considering a four-year project to improve its production efficiency. Buying a new machine press for $490,000 is estimated to result in $200,000 in annual pretax cost savings. The press falls in the MACRS five-year class, and it

    asked on November 1, 2015
  60. Principles of Finance

    Romo Enterprises needs someone to supply it with 121,000 cartons of machine screws per year to support its manufacturing needs over the next five years, and you’ve decided to bid on the contract. It will cost you $880,000 to install the equipment

    asked on November 1, 2015
  61. Principles of Finance

    A five-year project has an initial fixed asset investment of $335,000, an initial NWC investment of $35,000, and an annual OCF of −$34,000. The fixed asset is fully depreciated over the life of the project and has no salvage value. If the required return

    asked on November 1, 2015
  62. Chemistry

    How many nanoliters of a 1.00 molar solution would be required to react with 5.00 grams of barium nitrate?

    asked on October 25, 2015
  63. Algebra 2

    Did I perform this operation correctly? (a^2-b^2)/(a^2-2*a*b+b^2) /(2*a^2+5*a*b+3*b^2)/(2*a+3*b) = 1/a-b

    asked on October 2, 2015
  64. Physics

    What effect does the normal force have on the coefficients of friction?

    asked on September 29, 2015
  65. Physics

    A storage battery has an emf of 6.3 volts and an internal resistance of 0.01 ohm. it is to be charged for 120 amperes.hours from a 30 volt emf source having a resistance of 0.08 ohm at the rate of 20 amperes. a. compute for the resistance needed b. what is

    asked on September 16, 2015
  66. chemistry

    Le Chatelier's principle lab

    asked on September 13, 2015
  67. chemistry

    What assumption did you make about the reaction of KMnO4 solution in those determinations where temp didn't change to allow k to be a constant?

    asked on September 6, 2015
  68. Ebhs,maths,siswati,english and business studies

    I am frank,i have 4 credits with me namely,maths,siswati,business studies and english,am asking what courses i can take

    asked on September 4, 2015
  69. Life orientation

    Can you please help with this question which says'descrie a recent service delivery protest in your community or in the neibourhood.what are the problem that the community faced?.under the following topic:campaign with responsibility

    asked on May 17, 2015
  70. math

    At Frugal Foods a loaf of bread cost about $1 in 1980. In 2013, the loaf of bread cost $2.50. 1.A ratio is a comparison of two amounts by division. What is the ratio of the cost of a loaf of bread in 2013 to the cost in 1980? 2.50/1 2. Assuming the price

    asked on May 14, 2015
  71. chemistry

    A particular brand of toothpaste claims to contain 0.24 wt% sodium fluoride. What mass in grams of fluoride ion would be present in the average amount of toothpaste used to brush one's teeth, about two grams? Now this is a weight percent concentration

    asked on May 7, 2015
  72. chemistry

    As a research chimst, you are intrested in studying the extent and type of interactions in aqueous salt solution. As part of this study, you weight three samples of NaCl and dissolve each in 1.000kg H2O. You then measure the freezing temp. of each solution

    asked on May 3, 2015
  73. Calc

    A stone is thrown straight up from the edge of a roof, 625 feet above the ground, at a speed of 20 feet per second. A. Remembering that the acceleration due to gravity is -32 feet per second squared, how high is the stone 2 seconds later?

    asked on April 21, 2015
  74. math

    write an addition equation the equation must have a 1 a 2 a 3 digit added and use all of these digits 662-228-8000

    asked on April 16, 2015
  75. math/physics

    A 8 kg mass is attached to a spring hanging from the ceiling and allowed to come to rest. assume that the spring constant is 40 n/ m and a damping constant is 3 N/m. At t=0 and external force of 2 sin(2t+PI/4)N is applied to the system. determine amp,

    asked on April 10, 2015
  76. Geometry

    Write the equation of a circle given the following: Diameter measures 15 units and the center is at the intersection of y =x + 7 and y= 2x-5

    asked on March 1, 2015
  77. quadratic formula

    2x^2=-8x+10 I got x=-2-1i x=-2+1i But every time I plug the numbers back into the equation I am not getting the sides to equal. Not sure how to use the imaginary i.

    asked on February 27, 2015
  78. solution making/ chemistry/biotech

    You have 750ml's of a solution that was originally made up using a 20X stock. How much stock was used? I think the answer is 37.5 by dividing 750/20 but I am not sure

    asked on February 26, 2015
  79. Solution Making

    Suppose you start with a 5X solution A, and you want a final volume of 10ul of 1X solution. How much Solution A do you need? Can you please check my work not sure. I need 2 ul of solution A to 8 ul of H2O. 5/1=.2*10=2

    asked on February 23, 2015
  80. COMM/215

    I would like to know if i have used the correct grammar and punctuation in the following two sentences: 47. "Have you ever read the story, 'The Tell-Tale Heart' by Edgar Allen Poe?" Dave asked. 48. "Did the professor say, 'Put down your pencils'?" Janice

    asked on January 31, 2015
  81. COMM/215

    I would like to know if i have used properly structured sentences for the following: 49. To succeed in the new economy, workers will have to learn throughout their careers adapt to changing circumstances, and self-motivate when needed. 50. Some students

    asked on January 31, 2015
  82. AP Calc

    find f(x), if f'(x)=2x-3 and the graph of y=f(x) contains the point (2,5).

    asked on January 19, 2015
  83. algebra

    the lenght of a rectangular is 50 feet more than the width,it the perimeter of the basketball court is 300 feet,what is the lenght of the field

    asked on January 17, 2015
  84. Intro to computers

    You have set up Remote Desktop for the company server running Server 2008 so that your users can RDP in from their XP workstations. Users are calling you saying that they are being denied the ability to remote in. What is the most likely reason? A. XP does

    asked on January 11, 2015
  85. Physics

    An object is placed 4 cm in front of a concave lens of focal length 3 cm. Using the lens equation, find where the image will form and state whether it is a real or virtual image.

    asked on December 13, 2014
  86. Physics

    An object is placed 4 cm in front of a convex lens of focal length 3 cm. Using the lens equation, find where the image will form and state whether it is a real or virtual image.

    asked on December 13, 2014
  87. Physics

    An object is placed 11 cm in front of a convex mirror of focal length 4 cm. Using the lens equation, find where the image will form and state whether it is a real or virtual image.

    asked on December 13, 2014
  88. Physics

    What is the frequency of a sound wave in air at 20°C that has a wavelength of 0.4 m?

    asked on December 13, 2014
  89. Physics

    A cubical object of sides 5 cm is immersed completely in water. What is the force of buoyancy on the object? (Assume g = 10 m/s2)

    asked on December 13, 2014
  90. physics

    Two point charges, each 6*10-5 C, are separated by 30 cm. What is the electrostatic force produced by this arrangement?

    asked on December 12, 2014
  91. Physics

    A 30 ohm resistor is connected to a 1.5 V battery. How much power is dissipated by the resistor? I'm confused of the formula to use here.

    asked on December 11, 2014
  92. Physics

    A 4 ohm resistor and 10 ohm resistor are connected in series. If this circuit is connected to a 12 V battery, how much current will flow through the circuit?

    asked on December 11, 2014
  93. Physics

    A 10 ohm resistor and a 20 ohm resistor are connected in parallel. What is the equivalent resistance of this setup? What formula do I use for this?

    asked on December 11, 2014
  94. Physics

    Aluminum has a resistivity of 2.7*10-8 Ùm. What would be the resistance of 100 m of aluminum wire with a cross-sectional area of 2*10-4 m2?

    asked on December 11, 2014
  95. Physics

    How can you demonstrate that water is denser than ice without weighing them? What is the principle involved?

    asked on December 10, 2014
  96. chemistry

    EDTA: 292.2 1. How would you make 250ml's of a 15% EDTA solution 2.How much of solution 1(above)should be used to make 500ml's of a .1% EDTA solution.

    asked on December 5, 2014
  97. Physics

    A ball is thrown horizontally from the top of a building 45.9 m high. The ball strikes the ground at a point 121 m from the base of the building. The acceleration of gravity is 9.8 m/s2 . Find the time the ball is in motion. Answer in units of s Find the

    asked on November 16, 2014
  98. physics

    A descent vehicle landing on the moon has a vertical velocity toward the surface of the moon of 22.7 m/s. At the same time, it has a horizontal velocity of 58.9 m/s. At what speed does the vehicle move along its descent path? Answer in units of m/s At what

    asked on November 16, 2014
  99. Advanced Algebra

    The polynomial function defined by f(x) = 1 − x + x^2 − x^3 + ... + x^16 − x^17 may be written in the form f(y) = a_0 + a_1 y + a_2 y^2 + ... + a_16 y^16 + a_17 y^17, where y = x + 1 and a_i s are constants. Find a_2.

    asked on November 15, 2014
  100. Calculus

    Find the points at which y = f(x) = x^11-6x has a global maximum and minimum on the interval 0 ¡ x ¡ 4 Round your answers to two decimal places. Global Maximum: (x,y) = (,) Global Minimum: (x,y) = (,)

    asked on October 29, 2014


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