1. physics

    An archer pulls a bowstring back 0.390 m, and the spring constant of the bow is 675 N/m. a.) Find the amount of work the archer did to draw the bow. b.) Find the speed an arrow of mass 0.075 kg will have when it is shot from the bow. Assume no losses from

    asked by archie on February 20, 2018
  2. Math

    Let A(2,3) be a fixed point. A point P moves such that PA is equal to the distance of P from the y-axis. Find the equation of the locus of P PA2 = (x-x1)2 + (y-y1)2 +??? = (x-2)2 + (y-3)2 +??? I tried solving it using the distance formula but I'm still

    asked by Nye on September 6, 2016
  3. Math

    Let A(2,3) be a fixed point. A point P moves such that PA is equal to the distance of P from the y-axis. Find the equation of the locus of P PA2 = (x-x1)^2 + (y-y1)^2 +??? = (x-2)^2 + (y-3)^2 +??? I tried solving it using the distance formula but I'm still

    asked by Nye on September 6, 2016
  4. chemistry

    How much energy is evolved when 2.65 mg of Cl(g) atoms adds electrons to give Cl1-(g) ions. No clue how to go about solving this problem as it doesn't really relate to any of my examples in my text book or notes. All I can find that related to this problem

    asked by Spider on April 3, 2010
  5. Calculus

    Two particles move along the x -axis. For 0 is less than or equal to t is less than or equal to 6, the position of particle P at time t is given by p(t)=2cos((pi/4)t), while the position of particle R at time t is given by r(t)=t^3 -6t^2 +9t+3. 1. For 0 is

    asked by Madeline on December 19, 2012
  6. Calculus

    Two particles move along the x -axis. For 0 is less than or equal to t is less than or equal to 6, the position of particle P at time t is given by p(t)=2cos((pi/4)t), while the position of particle R at time t is given by r(t)=t^3 -6t^2 +9t+3. 1. For 0 is

    asked by Madeline on December 19, 2012
  7. Calculus

    A manufacturer determines that the profit derived from selling x units of a certain item is given by: P = − 2x^2 +800x Find the marginal profit for a production of 20 units. Also, The demand function for a particular commodity is given by: p = 400− 4x

    asked by John on August 23, 2011
  8. Calculus

    For f(x)=2(x+5)^3 +7 Find and classify the extreme values, determine where the function is increasing and decreasing, where it is concave up and concave down, and any points of inflection. I understand this is using the first and second derivative tests,

    asked by Natalie on July 22, 2014
  9. math

    The position vectors of points A and B with respect to the origin 0, are (-8,5) and (12,-5) respectively. Point M is the midpoint of B and N is the midpoint of OA. (a) Find: (i) The coordinates of N and M (ii) The magnitude of NM (b) Express vector NM in

    asked by Kg on October 7, 2013
  10. Differential Equations

    Find the charge on the capacitor in an LRC series at t = 0.02 sec when L = 0.05 h, R = 2 Ohm, C = 0.01 farad. The initial conditions are q(0) = 5 C, i(0) = 0 Ampere. Determine the firt time at which the charge on the capacitor is equal to zero. Also, find

    asked by Chuck on April 22, 2012
  11. algebra HELP PLEASE

    Selling shirts. If a vendor charges p dollars each for rugby shirts, then he expects to sell 2000  100p shirts at a tournament a) Find a polynomial R(p) that represents the total revenue when the shirts are p dollars each. b) Find R(5), R(10), and R(20).

    asked by bobbi on July 25, 2010
  12. math

    1000 tickets for prizes are sold for $2 each. Seven prizes will be awarded – one for $400, one for $200, and five for $50. Steven purchases one of the tickets. a) Find the expected value b) Find the fair price of the ticket. The expected value= 950/2000

    asked by Mario on March 25, 2007
  13. Physics

    A shell is fired from the ground with an initial speed of 1.72 103 m/s at an initial angle of 40° to the horizontal. a) Neglecting air resistance find the horizontal range b) Find the amount of time the shell is in motion

    asked by Jacob on November 14, 2012
  14. Math stuff

    Can someone please help me with something? Find the surface area of the prism. 5 m, 12m, 9m. its rectangular Also, Find the surface area of the cylinder to the nearest tenth of a square unit, 4cm, 12.4 cm. I dont quite understand this unit, im bad a

    asked by Booper on April 4, 2018
  15. Physics

    Use the relationship power = current voltage to find out how much current is drawn by a 1350 watt hair dryer when it operates on 120 volts. Then use Ohm's law to find the resistance of the hair dryer.

    asked by John on February 21, 2011
  16. Ap calc.. Dying!! Please help!

    Given the curve x^2-xy+y^2=9 A) write a general expression for the slope of the curve. B) find the coordinates of the points on the curve where the tangents are vertical C) at the point (0,3) find the rate of change in the slope of the curve with respect

    asked by Aparna on January 25, 2013
  17. Math- Calc 1

    1. At what point does the normal line to the curve x^2 - XY + Y^2 = 3 at the point (-1,1) intersect the curve again? 2. Find the constants A, B so that if Y=A*sin X + B cos X, then Y satisfies the differential equation Y" + 2Y = 0. 3. Find the points on he

    asked by Lynn on February 25, 2015
  18. History

    I'm doing a project for the Republic of Congo (Not the Democratic) and I have to find a holiday celebrated there and explain and name one food eaten on that holiday I chose National Youth Day but I cant find a specific food they eat on that day. Can anyone

    asked by Anonymous on October 30, 2016
  19. physics

    An electron passes location h0.02m, 0.04m,−0.06mi, and 4 μs later is de- tected at location h0.02 m, 1.84 m,−0.86 mi. Find the average velocity of the elecron: ¯v = If the electron continues to travel at this av- erage velocity, find where it will be

    asked by NADIA on January 19, 2014
  20. math

    In developing a multiple linear regression model in excel. How do I find the x and Y inputs. How do I find a 95% confidence interval for the mean market value for houses that are 30 years old and have 1,800 sq ft, and 95% prediction interval for a house

    asked by Rachael on August 25, 2013
  21. Calc

    1. At what point does the normal line to the curve x^2 - XY + Y^2 = 3 at the point (-1,1) intersect the curve again? 2. Find the constants A, B so that if Y=A*sin X + B cos X, then Y satisfies the differential equation Y" + 2Y = 0. 3. Find the points on he

    asked by Anonymous on February 25, 2015
  22. math

    The position vectors of points A and B with respect to the origin 0, are (-8,5) and (12,-5) respectively. Point M is the midpoint of B and N is the midpoint of OA. (a) Find: (i) The coordinates of N and M (ii) The magnitude of NM (b) Express vector NM in

    asked by kg on October 7, 2013
  23. physics

    a bus having mass of 3000kg is moving at 30m/sec.find the momentum of the bus. 1)at the starting point from rest. 2)at the final state while motion at 30m/sec. 3)find the difference of moment in above (1) and (2)

    asked by sweetie on November 24, 2010
  24. Algebra

    A certain region is losing 24 million acres of rain forest each year? find a linear function f that calculates the change in acres of rain forest in millions in x years. then find f(4) and interpret the result

    asked by Tia on August 5, 2012
  25. physics

    A body moves in a straight line with initial velocity and uniform acceleration. Find how far it travels in 12s, giving that it travels 246m in the first 6seconds and 69m in the last 3seconds. Find also the initial velocity.

    asked by skenge on February 15, 2013
  26. History

    I am trying to find indepth information on the anti-federalists argument for states' rights. I know that it involved the states' rights concerning political, economic and military control. I can only find information that is way over my head. I am in the

    asked by Sara on June 7, 2009
  27. Chemistry

    I need to find the tested and published pH values of the following solutions: (1) 1.0 M NaCl (2) 1.0 M sodium acetate (3) 1.0 M sodium sulfate (4) 1.0 M Sodium Bisulfate (5) 1.0 M Sodium Carbonate (6) 1.0 M Ammonium Chloride\ Is there a reliable MSDS

    asked by Really Need Help on March 6, 2012
  28. Math

    Find an equation for the tangent line to the curve at (π/2 , 2). y = 4 + cot(x) - 2csc(x) I am confused how to take the derivative of this problem. When I tried to solve it I ended up with -csc^2 (x) + (2csc(x) * cot(x)). From there I can't seem to

    asked by Dave on October 11, 2016
  29. Trigonometry

    A freighter, streaming on course 140„a at 20 knots, is 40 nautical miles N20„aE of a submarine with a cruising speed of 25 knots. Find the course to be set by the sub to overtake the freighter in the least amount of time, and find this minimum time.

    asked by Anonymous on January 15, 2012
  30. calculus

    Let f be the function defined by f(x)= sqrt(x), 0

    asked by lisa on October 8, 2012
  31. physics

    Find the force acting on a 12,500 kg F4 Phantom jet in the following situations (you will need to find the acceleration first) : 1. It is catapulted from rest to 250 km/hr in 2.2 seconds. Acceleration: (250/2.2) / 2.2 = 51.6 F = 12,500 * 51.6 = 645 645N Is

    asked by catlover on May 11, 2018
  32. Math- Calc 1

    1. At what point does the normal line to the curve x^2 - XY + Y^2 = 3 at the point (1,1) intersect the curve again? 2. Find the constants A, B so that if Y = Asin X = B cos X, then Y satisfies the differential equation Y" + 2Y = 0. 3. Find the points om he

    asked by Lynn on February 24, 2015
  33. physics

    A 3.60 kg object is attached to a vertical rod by two strings as in the figure below. The object rotates in a horizontal circle at constant speed 7.15 m/s. (a) Find the tension in the upper string. N (b) Find the tension in the lower string. N

    asked by jones on October 18, 2011
  34. algebra

    A certain region is losing about 12 million acres of rain forest each year. A. Find a linear function f that calculates the change in acres of rain forest in millions in x years. B. Find f(8) and interpret the results

    asked by Rhonda on April 10, 2013
  35. calculus

    Find the length of the curve given by the equation y= intergral from -pi to x of sqrt(cos(t)) dt for x between -pi and pi. I think I know to do this- at least part of it. I am using the fundamental theorem of calculus and the arc length formula, but I

    asked by Dean on August 2, 2017
  36. integral

    (1) The region in the x-y plane bounded by the curve y=x^2, the line x=0 and the line x=5 and the x-axis. find the volume generated (2) Assume that a force of (3x^2-x+1)N is pulling an object at each point of the x-axis. find the work done in moving the

    asked by matrix school 2 on August 6, 2009
  37. Trig

    Two people decide to find the height of an obelisk. They position themselves 25 feet apart in line with, and on the same side of, the obelisk. If they find that the angles of elevation from the ground where they are standing to the top of the obelisk are

    asked by Anonymous on September 10, 2014
  38. Trig

    Two people decide to find the height of an obelisk. They position themselves 25 feet apart in line with, and on the same side of, the obelisk. If they find that the angles of elevation from the ground where they are standing to the top of the obelisk are

    asked by Harry on September 10, 2014
  39. Finance

    Does anyone know where I can find information about the average industry ratios of financial information? I am working on a project and I would like to include more information. For example, I would like to compare a company's times interest earned ratio

    asked by TinkRose on May 17, 2010
  40. physics

    In 5.20 h, a balloon drifts 6.5 km north, 2.00 km east, and 2.76 km in upward elevation from its release point on the ground. (a) Find the magnitude of its average velocity. . km/h (b) Find the angle its average velocity makes with the horizontal. . °

    asked by Anonymous on November 28, 2011
  41. algebra

    Selling shirts. If a vendor charges p dollars each for rugby shirts, then he expects to sell 2000  100p shirts at a tournament a) Find a polynomial R(p) that represents the total revenue when the shirts are p dollars each. b) Find R(5), R(10), and R(20).

    asked by bobbi on July 23, 2010
  42. biology

    Extremophiles are organisms that thrive in extreme environments. For instance some species of bacteria live in the thermal vents of Yellowstone National Park while others live in the polar ice caps. As you might imagine, these bacteria have some rather

    asked by neka on October 15, 2007
  43. math question

    -The product of all the positive factors of 20 ( including 20) can be written2^x.5^y. Find x+y. -The number 18 is equal to 2 times the sum of its digits: 1+8=9. 2x9=18. There are 4 two digit numbers that are equal to 4 times the sum of their digitss . Find

    asked by Sony on March 13, 2013
  44. matc

    If a manufacturer charges q dollars each for footballs, then he can sell 3000-150q footballs per week. Find a polynomial R(q) that represents the revenue for one week. Find the weekly revenue if the price is $8 for each football.

    asked by lili on January 14, 2010
  45. physics

    ?????Two books of mass m1 = 6.9 kg and m2 = 3.8 kg are stacked on a table as shown in the figure below. Find the normal force acting between the table and the book on the bottom. SO g*m1+g*m2=104.86 N = mgcos(θ) N= (104.86)(9.81)Cos? Where do i find cos?

    asked by tommy on September 9, 2010
  46. Physics

    A fan rotates from rest and accelerates 1 rad per square second for 1 second find the angular velocity if 1 round= 2 pi find the complete no of rounds the fan rotates at constant velocity during second half of its motion

    asked by Zainab on April 12, 2011
  47. History

    I found that Montesquieu and Locke both influenced Jefferson in writing the Declaration. I know how Locke influenced him, but not Montesquieu. I can't seem to find information on that.. can someone tell me where I can find a short summary? All I need is

    asked by Meche on November 5, 2007
  48. math

    The weekly demand and supply functions for Sportsman 5 X 7 tents are given by the following respective functions where p is measured in dollars and x is measured in units of a hundred. Find the equilibrium quantity. Find the equilibrium price.

    asked by Anastasia on September 21, 2012
  49. physics

    We couldn't find "The mass density of brain matter is 1.040 g/cm^3, and of that, the mass fraction which is hydrogen, is 0.107. Find the number of hydrogen protons in a volume of 1cm^3 of brain tissue"

    asked by stephanie on April 11, 2011
  50. Physics

    A simple pendulum in a certain planet is found to vibrate 50 times in 100s. Find its (a) period, (b) its frequency. (c) When 1.5m of its length is cut, it vibrates 50 times in 50 s. Find the original length of the pendulum. thanks in advance

    asked by david on February 16, 2013
  51. Physics Electric

    The electric potential in a region is given by V(x,y,z) = -10.0x^2 + 20.0xyz + 6.0y^3 a) Find the electric field that produces this potential? b) Find the amount of charge contained within a cubic region in space 20 cm on a side and centered at the point

    asked by LS on December 6, 2014
  52. Trig

    how do i find the exact value of s [pie/2, pie] sin s = radical2/ whole number 2 what is s in radians? how do i figure this out without the use of a calculator. I drew the graph and located it in the second quadrant and i think the triangle is a 45-45-90

    asked by ALISON on September 15, 2011
  53. 4th grade math

    3. Writing to Explain Use rounding to estimate the product 13 ! 9. Then, use compatible numbers to find the actual answer. If Alison was rounding to find how much 13 books that were $9 apiece cost, would she get a good estimate? Explain

    asked by Paulette on August 29, 2012
  54. Chemistry

    I need to find the pH of a 500 mL solution of pure water after adding 33.0 mg of H2SO4 and 18.0 mg of HCl. Please help! So far I have tried to find the moles of 33.0mg of H2SO4 and got 3.24. Then I calculated pH by multiplying the subscript of H (2) by the

    asked by Nicole on November 27, 2016
  55. Stem Cell Research

    Hi I need to find 4 articles about stem cell research. 2 need to be ones that just support it and 2 the just oppose it. Does anyone have any link of web sites where I can find this. It can't talk about both it has to oppose or support. Also a website would

    asked by Rebekah on February 27, 2010
  56. Math

    Find the equation of the line tangent to curve x=sec(t), y=tan(t), at t=pi/6. I found th slope(derivative of the two which was csc(t). Plugged in Pi/6 and got 2 as the slope. Now how do I find the equation of the tangent? There are like two equations to

    asked by Beth on December 17, 2015
  57. Math

    Okay so I have to find how many total squares are in an 8 by 8 checkerboard. I have a roman letter thing that kinda looks like a capitol 'e' but without the middel line. On the bottom I have N=1 on the side of it i have N^2 and 8 on the top. Can anyone

    asked by Cameron on October 2, 2007
  58. calculus

    To find the equation of a line, we need the slope of the line and a point on the line. Since we are requested to find the equation of the tangent line at the point (64, 8), we know that (64, 8) is a point on the line. So we just need to find its slope. The

    asked by maura on September 14, 2012
  59. Math- Statistics

    A random sample of size 36 is to be selected from a population that has a mean μ = 50 and a standard deviation σ of 10. * a. This sample of 36 has a mean value of , which belongs to a sampling distribution. Find the shape of this sampling distribution. *

    asked by Tammy on February 8, 2011
  60. algebra

    You roll a red number cube and a blue number cube. Let A be the event "at least one number cube shows a 6" a) Find P(A) by finding the sum of P(6 on red cube, no 6 on blue cube), P(no 6 on red cube, 6 on blue cube), and P(6 on both cubes) b) Describe the

    asked by kms on June 7, 2017
  61. math

    You roll a red number cube and a blue number cube. Let A be the event "at least one number cube shows a 6" a) Find P(A) by finding the sum of P(6 on red cube, no 6 on blue cube), P(no 6 on red cube, 6 on blue cube), and P(6 on both cubes) b) Describe the

    asked by kms on June 7, 2017
  62. History

    Please check my answers please. Thank you! 1. The U.S. economy is a free enterprise system. True* False 2. Work you do for pay is called a _____. service industry diverse workforce job* volunteer job 3. When there are many people seeking the same job, this

    asked by Anonymous on September 7, 2016
  63. psy- revise please

    Question: By the time people reach young adulthood, they have an idea of what causes them stress. The text discusses several sources of stress. What sources of stress did the text identify of which you were previously unaware? Has your reading helped you

    asked by rose - Ms. Sue on April 22, 2008
  64. Calculus

    Great! I understand now that C0=f(a) c1=f'(a) c2=f"(a)/2 Now, If I am to find the parabolization of the equation x^2-x at x=2, then c0=x^2-x=2^2-2=2 c1=2x-1=2(2)-1=3 c2=2/2=1 So, the equation (taken from c0+c1(x-a)+c2(x-a)^2) is >> 2+3(x-2)+1(x-2)^2?? Is

    asked by Matt on November 13, 2006
  65. Math

    At a selling price of $ 54 , a lamp company breaks even on total sales of $ 3564 . If the company's overhead is $ 396 , find the marginal production cost per lamp and find the profit on sales of 145 lamps.

    asked by Irina on September 15, 2014
  66. Calculus

    Find the intervals where the function f(x)=((2x-1)^2)(x-3)^2 is concave up and concave down and find all inflection points. Give decimal answers using two decimal place accuracy. Please help me!!! I really don't understand! and please show your work so

    asked by Sam on March 17, 2011
  67. statistics

    Help me! Population of heights of college students is approximately normally distributed with a mean of 64.37 inches and standard deviation of 6.26 inches A random sample of 74 heights is obtained. Find the mean and standard error of the x bar distribution

    asked by anon on November 6, 2011
  68. Calculus

    Suppose f(x)= e^(-1/x). Graph this function in the window -5(

    asked by George on November 9, 2009
  69. statistics

    a study found that the average time it took a person to find a new job was 130 days. If a sample of 36 job seekers was surveyed, find the 95% confidence interval of the mean. Assume the standard deviation of the sample is 12 days.

    asked by dell on March 19, 2010
  70. pre-calculus

    At a selling price of $ 54 , a lamp company breaks even on total sales of $ 3564 . If the company's overhead is $ 396 , find the marginal production cost per lamp and find the profit on sales of 145 lamps.

    asked by Anonymous on September 15, 2014
  71. math

    The cost in $ of making "x" leaf blowers is given by C(x)=45x+6000. Each blower can be sold for $60.00 a)find revenue function b)find equation that expresees that profit for selling "x" leaf blowers. c)How many units must be sold to break even?

    asked by jack on September 15, 2012
  72. Calculus

    Suppose f(x)= e^(-1/x). Graph this function in the window -5(

    asked by George on November 8, 2009
  73. Calculus

    Given: F(x)= 5x^2 a) find a simplified form of the difference quotient b) find the average rate of change (difference quotient)x=4, h=2 Please help... http://www.mathwords.com/d/difference_quotient.htm Ok I went to this site and I saw the formula, how do I

    asked by Dee on February 9, 2007
  74. statistics

    A charity believes that when it puts out an appeal for charitable donations the donations it receives will normally distributed with a mean of $50 and standard deviation of $6, and it is assumed that donations will be independent of each other. (i) Find

    asked by Probability on February 15, 2011
  75. calculus

    find derivative y= 3x^5-6x^3/7secx find dy/dx * xcosy= 5( y+cosx) * X^5-Y^3+8XY=466 * A RIGHT TRIANGLE HAS LEGS OF LENGTH 15M AND 7M. THE 7M LEG IS NOT CHANGING. 15M LEG IS GETTING LONGER AT RATE OF 8M PER SECOND. SO WHAT IS RATE OF CHANGE OF THE

    asked by aisha on December 16, 2012
  76. Light Energy Problems

    The binding energy of electrons in a metal is 194 kJ/mol. Find the threshold frequency of the metal. ----------------- The heat of fusion of ice is 6.00 kJ/mol. Find the number of photons of wavelength = 6.78×10^−6 m that must be absorbed to melt 6.80 g

    asked by Amy on November 27, 2012
  77. English

    i don't know if you remember helping me with my poem analysis on Amulet by Ted Hughes, but i need more help. i don't know what i'm doing wrong here but i can't find what i'm looking for. So why do you think Ted Hughes wrote this??? what do you think he

    asked by HELP Writeacher on November 25, 2007
  78. physics

    A 3.25-kg object is attached to a vertical rod by two strings as shown in the figure below. The object rotates in a horizontal circle at constant speed 6.60 m/s. (a) Find the tension in the upper string. N (b) Find the tension in the lower string. N

    asked by jojo on March 28, 2016
  79. physics

    A warehouse worker pushes a crate along the floor, as shown in the figure , by a force of 10.0 N that points downward at an angle of 45.0 degree below the horizontal. A. Find the horizontal component of the push. B.Find the vertical component of the push.

    asked by andrea on February 2, 2011
  80. Chemistry

    The binding energy of electrons in a metal is 194 kJ/mol. Find the threshold frequency of the metal. ----------------- The heat of fusion of ice is 6.00 kJ/mol. Find the number of photons of wavelength = 6.78×10^−6 m that must be absorbed to melt 6.80 g

    asked by James on November 28, 2012
  81. physics

    A child ties a rock to a string and whirls it around in a horizontal circle. Assuming a 1.50 m -long string making 20.0 ∘ angle below the horizontal, find the speed of the rock. Find the period of its uniform circular motion.

    asked by missy on February 9, 2016
  82. Physics

    a 600 gram cart is pulled along a table with no friction by a string attached to a 200g mass hanging over a pulley. find the acceleration. Find the acceleration if the cart is inverted so it slides and the coefficient of friction is 0.2

    asked by Phil Miles on January 6, 2013
  83. physics/maths help damon or steve or scott

    A body moves in a straight line,with initial velocity and uniform acceleration.find how far it travels in 12sec.,given that it travels 246m in the first 6 sec.,and 69m in the last 3sec.find the initial velocity. Please show step

    asked by weryiyemi on March 22, 2017
  84. PHYSICS

    A warehouse worker pushes a crate along the floor, as shown in the figure , by a force of 10.0 N that points downward at an angle of 45.0 degree below the horizontal. A. Find the horizontal component of the push. B.Find the vertical component of the push.

    asked by mely on February 2, 2011
  85. journalism

    Hi I'm supposed to write a story on the school's CSTs scores and eve though I have tried, I haven't been able to find a website with school's scores. If you could find it, I would be very pleased. Thank you in advance Thank you for using the Jiskha

    asked by Claudia on April 3, 2007
  86. algebra

    This one really threw me off... find the slope of the line containing the points (x, 2x) and (x + h, 2(x +h)) You have to first find the slope, which is change in y over change in x: {[2(x-h)]-2x}/[(x+h)-x] (2x-2h-2x)/(x+h-x) -2h/h m=-2. i don't have an

    asked by dee on January 23, 2007
  87. Calculus

    Let R be the region bounded by the y-axis and the curves y = sin x and y = cos x. Answer the following. a)Find the exact area of R. b)A solid is generated by revolving R about the x-axis. Find the exact volume of the solid.

    asked by ronnieday on April 20, 2012
  88. Geology

    I need to find some kind of song written after 1990 about geology. It have to do with any part of geology but it just had to be written after 1990. any suggestions about where i might be able to find something like this? -thanks-

    asked by A on October 18, 2006
  89. math

    I am having to find the value of y for the given values of x. I understand how to find the value of x, but I am unsure how to put it in the form of ordered pairs: This is not the actual problem on my assignment: y=7^x, for x=2 y=7^2 y=7*7 y=49 I am lost as

    asked by Malissa on February 25, 2010
  90. Calculus

    Let F of x equals the integral from 1 to 3 times x of the natural logarithm of t squared. Use your calculator to find F″(1). A. 12 B. 6 C. 4 D. 1/9 Find the range of the function f of x equals the integral from 0 to x of the square root of the quantity

    asked by Justin on July 30, 2019
  91. Math

    Jim was putting carpet in his sons tree house.He needed to find the area of the floor. But he was having trouble with the multiplication. The measurements were 4.2 meters by 6.3 meters. Do the multiplication to help him find the area

    asked by Michey on January 10, 2013
  92. Physics

    A stock car starts from rest at time t=0 with velocity (m/s) increasing for 4.0 s , according to the function Vx=1.4t2+1.1t. a) Find the car's velocity at the end of the 4.0 s interval. b) Find the average acceleration for this interval.

    asked by Kay on January 21, 2017
  93. physics

    Two blocks of equal masses are connected by a string. Block 1 is pulled by a force of 30 N which accelerates both blocks at 3 m/s2 along a surface of negligible friction A) find the masses of each block B) find the tension

    asked by Thikha on January 26, 2015
  94. statistics

    Please help. I have no idea what I am doing Use the standard normal (z score) table to find: P(-1.00 ≤ z) & Find the probability that a data value picked at random from a normal population will have a standard score (z) that lies between the following

    asked by sharon on December 29, 2017
  95. Chemistry

    How do you find the number of valence electrons in a molecule? Do I need to use the Lewis structure diagram to find out? Please help! I need to the total number of valence electrons for SiH4, H2SO4, CCl4, BF3 and I don't know how!

    asked by Anonymous on February 10, 2010
  96. physics

    The current density in a cylindrical conductor of radius R = 59.5 cm, varies as J(r) = J0r/R (in the region from zero to R), where J0 = 0.423 C/m2. a) Find the magnitude of the magnetic field at r = 29.75 cm. b) Find the magnitude of the magnetic field at

    asked by Anonymous on December 10, 2012
  97. Physics

    A speedboat increases in speed from 21 m/s to 30.9 m/s in a distance 191 m. a)Find the magnitude of its acceleration. Answer in units of m/s^2. b)Find the time it takes the boat to travel this distance. Answer in units of s.

    asked by Smith on February 5, 2014
  98. College Physics

    Two long, parallel wires separated by 50 cm each carry currents of 3.0 A in a horizontal direction. Find the magnetic field midway between the wires if the currents are in the same direction. B= T Find if they are in opposite directions. B= T

    asked by Lanise on February 19, 2010
  99. Calculus

    PLZ show work, find the rieman sum of 6 intervals of sinx from (0,pie) also find the absolute min and max of ln(2+sinx) for pie(or equal to) 2pie

    asked by ALEX on January 19, 2011
  100. SAT Math

    Can I please get some help on these questions: 1. If , find the value of 2 square root of 17-x = 2x-10, find the value of x/4. 2. If absolute value of 3x+6 < 9, then which of the following is a possible value of x ? My answer choices are -7, 1, -5, -1, 10.

    asked by mysterychicken on June 1, 2013

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