1. Physics

    An object is moving in the x-direction at 1.3 m/s when it undergoes an acceleration a=0.50j^m/s2. Question: find its velocity vector after 4.0s. Express your answer as a comma-separated pair of components.
  2. Technology

    i'm not really sure about this answer, because i didn't find it in my book. i think i'm correct. please check: 10. A wrench uses the principle of a(n)__________ in its operation. a. lever b. inclined plane c. pulley d. wheel and axle B?
  3. world history

    I am writing a paper for school over winter break and this is one of the question i have to answer I really cant find anything on line so any help you could give would be great. what measures would it take to destroy and/or disrupt the infrastructure of
  4. Math

    Please help You find an old savings bond that originally cost $50. It has been compounding 3% interest annually for the last 75 years. How much is it worth? Make sure you round your answer to the nearest cent.$459
  5. law

    can someone please help me to understand what I am looking for to answer this question and where to find the information. examine how criminal justice responses to crime may be shaped by these theories (Differential-Association and the Rational Choice).
  6. calculus

    Use left endpoints and 9 rectangles to find the approximation of the area of the region between the graph of the function cos2x and the x-axis over the interval [0, pi/2] . Round your answer to four decimal places.
  7. math

    Suppose a certain economy's consumption function is as follows, where C(x) and x are measured in billions of dollars. C(x) = 0.76x^1.1 + 18.19 Find the marginal propensity to consume (dC/dx) when x = 7. (Round your answer to three decimal places.)
  8. ALGEBRA

    Find the ending balance in an account that opens with $3,560, earns 3.5% interest compounded monthly, and is held for 15 years. (Round your answer to the nearest cent.) =
  9. math

    the perimeter of a rectangle is 270 meters. find its dimension if the width is 3/4 of its length.
  10. math,orrection

    is this correct now.. Problem #1 Find the simple interest assume a 360-day year. Round result $17000 at 9%for 119 days. answer: 5619.44
  11. ALGEBRA

    Find the APR for the following loan (monthly payments). (Round your answer to the nearest full percent.) Purchase a refrigerator for $2,100 at 20% add-on interest for 3 years.
  12. Geometry

    Find the missing numbers for the dimensions and measures of a rectangular prism... Length ? Width 2.5 m Height 4.6 m Surface Area ? Volume 172.5 m to the third power Please answer the one's with a ?. Thank you.
  13. MATH

    Find the cost of a home in 20 years, assuming an annual inflation rate of 2%, if the present value of the house is $280,000. (Round your answer to the nearest cent.
  14. Math

    For a savings account paying 2.4% in which interest is compounded MONTHLY. FIND THE Time needed to double the initial investment of 10000 dollars. The answer is 28.9 years but WHY
  15. US History

    Evaluate the evidence presented by Rice and Rockefeller. What light do they shed on the Robber Baron Industrial Statesman debate? I can't find the answer in my book, so any help is appreciated. Please and thank you!
  16. ALGEBRA

    Find the ending balance in an account that opens with $5,000, earns 7.5% interest compounded quarterly, and is held for 20 years. (Round your answer to the nearest cent.)
  17. algebra

    Find the ending balance in an account that opens with $6,000, earns 4.5% interest compounded quarterly, and is held for 10 years. (Round your answer to the nearest cent.)
  18. Propagating error

    Find the absolute and percent relative error for each calc. b) 81.5 (+/- 0.5) x 40.2 (+/- 0.2)/ 21.8 (+/- 0.2) my answer for absolute error was 150. +/- 200, which is outrageous. Can someone show how they would do it so I can compare and find my mistake?
  19. physics (electricity)

    note: E is for exponetial two large horizontal, parallel metal plates are 2.5cm apart in air and the upper is maintained at a positive potential relative to the lower so that the field strenght between them is 2.1x10E3vmE-1 the potential difference between
  20. Math Help!

    Find 21/25 of $27,000 A:$32,140 B:$5,670 C:$22,680 D:$23,760 Could you explain how it is C?? A new law requires that 12% of an individual's income be invested in the stock market. Your accounts show that you need to put $420 in the stock market this year.
  21. Physics

    A scuba diver must decompress after a deep dive to allow excess nitrogen to exit safely from his bloodstream. The length of time required for decompression depends on the total change in pressure that the diver experienced. Find this total change in
  22. Physics

    For parts A-C: /^Vo | 2M | velocity into pg. ->R )2m ) ------ top view rear view A car of mass, 2m, is going around a turn at a constant radius, R, with velocity, v0. The turn is not banked – it is a flat surface. Assume the car and the road are on
  23. maths

    An arithmetic progression has 10 terms. Sum of the 10 terms is 220. Sum of the odd terms is 100. Find the first term and common difference. pl give me the answer. maths - Steve Monday, July 17, 2017 at 12:11pm 10/2 (2a+9d) = 220 5/2 (2a+4*2d) = 100 maths -
  24. Chemistry AP

    Hey Bob, What is the pH at the point during a titration when 20 mL of 0.200 M HCl has been added to 30 mL of 0.0500 M NH3 solution? HCl is strong acid, Kb = 1.8 × 10−5 for NH3. Answer in units of pH. I've gone about getting the mmol of HCl and NH3,
  25. Math

    A brewery's filling machine is adjusted to fill bottles with a mean of 31.5 oz. of ale and a variance of 0.003. Periodically, a bottle is checked and the amount of ale noted. (a) Assuming the amount of fill is normally distributed, what is the probability
  26. Math Help

    A brewery's filling machine is adjusted to fill bottles with a mean of 31.5 oz. of ale and a variance of 0.003. Periodically, a bottle is checked and the amount of ale noted. (a) Assuming the amount of fill is normally distributed, what is the probability
  27. PHYSICS *_* HELP PLEASE

    A spring scale being used to measure the weight of an object reads 17.1 N when it is used on earth. The spring stretches 4.40 cm under the load. The same object is weighed on the moon, where gravitational acceleration is 1 6 g. Find the reading of the
  28. physicss

    A spring scale being used to measure the weight of an object reads 17.1 N when it is used on earth. The spring stretches 4.40 cm under the load. The same object is weighed on the moon, where gravitational acceleration is 1 /6 g. Find the reading of the
  29. PHYSICS!!!!HELP PLEASE

    A spring scale being used to measure the weight of an object reads 17.1 N when it is used on earth. The spring stretches 4.40 cm under the load. The same object is weighed on the moon, where gravitational acceleration is 1 /6 g. Find the reading of the
  30. Math

    Can someone correct them 5) Write fraction as a percent 7/8 My answer: 0.875=87 1/2% 6)Write each decmal as a percent 0.008 My answer:8% 7) Write as a decimal 160% My answer:1.60 8)Write as a fraction 52% My asnwer:5/10 5) Write fraction as a percent 7/8
  31. math

    find the standard deviation for the following: 8,5, 12, 8, 9, 15, 21, 16, 3. There is a formula but our teacher wants us to do it a specific way. For example, 47, 41, 32, 53, 57. First you find the mean, which is 46 and then subtract it with each number in
  32. English

    Can you please answer my question? I posted the question before.But nobody gave an answer. It is middle of the Jiskha Homework Help Forum page. Where it says: NAME:KHUSHI SUBJECT:INTERESTING FACT AND CHRISTMAS JUST CLICK ON IT, THEN YOU WILL SEE MY
  33. Maths

    Paula asked 30 students what they ate for lunch. All the students had at least a sandwich, salad or fruit. ********************************* QUESTION A Draw a Venn Diagram. * * * * * * * * * * * * * * * * * THIS IS THE INFORMATION FROM THE DIAGRAM: 5
  34. Check Answers PLEASE

    Paula asked 30 students what they ate for lunch. All the students had at least a sandwich, salad or fruit. ********************************* QUESTION A Draw a Venn Diagram. * * * * * * * * * * * * * * * * * THIS IS THE INFORMATION FROM THE DIAGRAM: 5
  35. Physics

    Two lifeguards pull on ropes attached to a raft. If they pull in the same direction, the raft experiences a net external force of 365 N to the right. If they pull in opposite directions, the raft experiences a net external force of 132 N to the left. Draw
  36. Math

    1. which is a rule that describes the translation of point from (-5, 4) to (-1, 2) A (x,y) --> (x - 4, y - 2) B (x,y) --> (x + 4, y - 2) (my answer) C (x,y) --> (x + 4, y + 2) D (x,y) --> (x - 4, y + 2) 2. the ordered pairs (2, -17) and (5, -35) are
  37. Math 7th Grade

    1. which is a rule that describes the translation of point from (-5, 4) to (-1, 2) A (x,y) --> (x - 4, y - 2) B (x,y) --> (x + 4, y - 2) (my answer) C (x,y) --> (x + 4, y + 2) D (x,y) --> (x - 4, y + 2) 2. the ordered pairs (2, -17) and (5, -35) are
  38. PHYSICS` HELP!! Please

    Really lost on how to explain these whether true or false!! HELP! Much appreciated Write True or False. If False, Explain why! 1. In a position vs. Time graph, a line whose slope is negative represents an object that is slowing down. Answer: I circled True
  39. Physics

    A truck on a straight road starts from rest and accelerates at 2.8 m/s^2 until it reaches a speed of 16 m/s. Then the truck travels for 16s at constant speed until the brakes are applied,stopping the truck in a uniform manner in an additional 3.6 s. How
  40. Science

    Can someone check if these are right: Tell the reaction rate 1.)Question: one antacid tablet is placed in a glass of cold water, while another table is placed in a glass of hot water. Answer:TEMPERATURE 2.) Question: a mixture of baking powder, flour,
  41. Science. NEED HELP PLEASE

    Can someone check if these are right: Tell the reaction rate 1.)Question: one antacid tablet is placed in a glass of cold water, while another table is placed in a glass of hot water. Answer:TEMPERATURE 2.) Question: a mixture of baking powder, flour,
  42. Physics- grade 12

    A ramp leading up to a loading platform is 3 m long and 1 m high at its highest point. If the friction is ignored, what work is needed to slide a 600-kg crate up the ramp at a constant speed? a) 2.00 *10^2 J b) 5.89 *10^2 J c) 1.80 *10^3 J d) 5.88 *10^3 J
  43. commercial advertising

    why are more and more advertising commercials animated?? ny answer: To catch the viewers attention. They are funny and colorful because the average person would probably not pay attention to a bland black and white commercial with no theme song or color.
  44. Physics

    A cyclist approaches the bottom of a gradual hill at a speed of 20 m/s. The hill is 4.4 m high, and the cyclist estimates that she is going fast enough to coast up and over it without peddling. Ignoring air resistance and friction, find the speed at which
  45. Physics-Conservation of Momentum

    3. A train loaded with steel, moving at 90km/h, collides head on with a stationary train of mass 6000kg. if the trains couple after collision and move forward with a velocity of 80km/h, find the mass of the train loaded with steel. My work so far: PTO=PTF
  46. Technology (Correct please)

    (1) In what stage does publishing occur? A- first B- second C- third D- final ~~~~~~~~~~~~~~~~~ My answer is D- final ~~~~~~~~~~~~~~~~~ (2) Publishing can include multimedia or multiple communication methods. Some types of multimedia are images, video, and
  47. chem

    given PCl5(g)+heat PCl3(g)+Cl2(g) a. addition of cl2 answer : would shift to the left b. increase in pressure: answer: ? c. removal of heat answer: ? d. Removal of PCl3 as it forms answer: ? please help! thanks!
  48. Algebra problems

    I have some problems that I would like checked please. Find and simplify the difference quotient f(x+h)-f(x)/h, h can not equal 0 for the given functions. 1. f(x)=x^2+3x+9- I got 2x+h+3 Evaluate the piecewise function at the given value of the independent
  49. Chemistry

    1. The reaction, CO(CH2COOH)2 CO(CH3)2 + 2CO2, follows first-order kinetics and has an activation energy of 96.6 kJ mol-1. At 293 K, k = 0.133 s-1. Find the temperature (in K) at which half-live will be 0.00692 min? Round your answer to 3 significant
  50. business math

    Of the 4800 students at Medium Suburban College (MSC), 50 play collegiate soccer, 60 play collegiate lacrosse, and 96 play collegiate football. Only 6 students play both collegiate soccer and lacrosse, 6 play collegiate soccer and football, and 16 play
  51. Algebra

    I need help step by step please I keep getting a wrong answer of 252? Find the 24th term in the expansion of (a + b)^ 25
  52. Calculas

    I stumble a question I cannot answer please help up. Find value of lower and upper limit of k for equation: (3x^3-5)/x^2 dx = 10 limit: -k , k
  53. math

    What is the formula and the answer of; Two numbers are in the ratio of 4:7 if the difference between the two number is 48 find the sum of two numbers.
  54. physics

    Find the tension T2 of the box hanging from the rope if 1 = 25°, 2 = 65°, T1 = 60.58 newtons, and W = 143.4 newtons answer please
  55. math

    which expression is equivalent to 3/4x-24. It imultiple choice a 1/4(3x-48) b 1/4(3x-24) c 3/4(x-32) d 3/4(x+32) I did it by trying each one out I got c 3/4(x-32) mult 3/4 by both 3/4x-24 Is this correct on how to find the answer and is it correct? thanks
  56. math help

    The perimeter of triangle RXA is 39, PX=49 and AP=9.Find RX and RA. I think it's under triangle bisector theorem. Help me answer this guys. Thanks.
  57. geometry

    Given that ABC 53-x with a leg of 28 ~ DEC, x+3 with a leg of 4 find the value of x. If necessary, round your answer to two decimal places.
  58. algebra ll

    if f(x)equals 5x^2 minus 4/x, find f(4) my ans. is f(4) equals 66 if wrong answer and show work please
  59. trig

    find an equation of the line that passes through (2,-4) and is parallel to the line 3x-y=1. Write your answer in the form y=mx+b. please help!
  60. math

    can someone correct this for me. Find the constant of variation k. m varies directly with n; m=144 when n = 8 my answer: 144 = k (8) --- ---- 8
  61. Algebra

    When the costs of a car is multiplied by 0.04 the result is $1760. Find the cost of the car. The answer is $?
  62. Geometry

    Find the equation of a line that is perpendicular to y=2x+7, and passes through the point (-4, 7) I got the answer y=-1/2x+5, is that the correct equation??
  63. Algebra 2

    In the equation x^2-6x+c=0, find the values of c that will give two imaginary solutions. a. c >= 5 b. c > 6 c. c < 6 d. c > 9 I figured out the equation with 6 (so I believe either b or c is the answer) being there, but is would it be > or
  64. Calculus

    Find y" by implicit differentiation. x^3+y^3 = 1 (x^3)'+(y^3)' = (1)' 3x^2+3y^2(y') = 0 3y^2(y') = -3x^2 y' = -3x^2/3y^2 y' = -x^2/y^2 y" = [(y^2)(-x^2)'-(-x^2)(y^2)']/y^4 y" = [(y^2)(-2x)-(-x^2)(2y)]/y^4 y" = [(-2xy^2)-(-2yx^2)]/y^4 y" = -2xy(y-x)/y^4 y"
  65. Math

    Triangle ABC is a right triangle. If AB = 3 and AC = 7, find BC. Leave your answer in simplest radical form.
  66. Math

    6sin(2x)+3=0 How do you find the smallest value of x in the interval 0≤x≤π for which y=0? My work so far: 6sin(2x)=-3 sin(2x)=-1/2 The answer should be 7π/12, or 1.83 Thanks in advance!
  67. precalc review/calc

    For the curve y=2^[sqrt(9-x2)], find the range of the function. I think the range is [0,8] but I don't know why. Could you show me how to get to that answer? Thanks.
  68. Math

    A number cube with the numbers 1 through 6 is rolled. Find P ( number is greater than or equal to 3). A.4\6 B.1\6 C.2\6 D.5\6 Is the answer A? Thank you
  69. statistics

    Find the sample variance s2 for the following sample data. Round your answer to the nearest hundredth. x: 23 17 12 35 29
  70. Geometry

    Find the image of O (-2, -1) after two reflections, first across the line y=-5, and then across the line x=1. (-2, -1) (-1, -6) ( 4, -9) ( 1, -5) I honestly think that the correct answer is not listed. Please help!
  71. Math

    Hi, I need some help with this question. Could anyone help? Tammy has 15 coins that total $1. What coins does she have and how many of each? Is there more than one answer? Find all the possibilities. Thanks, Hannah
  72. Statistics

    How would you do this problem The following is a list of ten measurements: 35,36,-38,-18,73,9,0.-67,-64,-59 10 over Sum under that is i=1 then sum-33xi how do I find the answer
  73. Math

    Find the circumfrence of the given circle. Round to the nearest tenth. The radius of the circle is 3.5 cm. A. 22.0 CM B. 28.5 CM C. 11.0 CM D. 42.8 CM Is the answer A? Thank you
  74. Math

    Find the variance for the given data. Round your answer to one more decimal place than the original data. {8.5, 4.5, 8.8, 6.9, 5.3}
  75. math

    Could someone check my answer to the following question? Find the other end point given the endpoint of (7,7) and midpoint of (0,0). the other endpoint would be (-7,-7)right?
  76. physics Classical Mechanics

    Enjoy, How did you find the answer to question on the yoyo I got it wrong, and question number 2 on torque. Thanks.
  77. math

    which expression is equivalent to 3/4x-24. It imultiple choice a 1/4(3x-48) b 1/4(3x-24) c 3/4(x-32) d 3/4(x+32) I did it by trying each one out I got c 3/4(x-32) mult 3/4 by both 3/4x-24 Is this correct on how to find the answer and is it correct? thanks
  78. physic

    A particle's position is given by z(t) = −(8.10 m/s^2)t^2k for t ≥ 0. (Express your answer in vector form.) (a) Find the particle's velocity at t = 3.00 s and t = 6.00 s.
  79. Geometry

    Find the slope of any line parallel to the line passing through G(2,-3) and H(-1,4). I believe the answer is 7/-3, but was wondering if it should be written 7 7 - / or / ? 3 -3
  80. math

    Find the Unknown length? ______________ 4 ft ______________x 15 ft my answer is 180 ft and the unknown side is 4 ft.
  81. calculus

    Find all numbers b such that the average value of f(x)=2+6x−3x^2 on the interval [0,b] is equal to 3. Give your answer as a list of numbers, e.g., {1,2,3}.
  82. College Math

    The average urbanite walks about 2 yd per second. A) How many seconds would it take to go 100yd? B) How may seconds would it take to go 440yd? Not sure how to go about to find the answer.
  83. Math

    find both the x - intercept and the y-intercept of the line given by the equation 1.8x+9.9y-6.3=0. Round the answer to 2 decimal places. Thank you again for the help
  84. algebra (checking answer)

    Checking to make sure I did it right.. Remainder theorem to find the remainder when f(x) is divided by the given x-k f(x)=x^3-4x^2+2x+4; x+2 2 x -4 2 4 1 2 -4 4 1 -2 -2 8 2)x^3-4x^2+2x+4. (X^3-2x^2-2x) is the answer x^3 -2x^2+-2x -2x^2+4x 6x+4 -2x+4 8x+8
  85. statistics

    Find the sample variance s2 for the following sample data. Round your answer to the nearest hundredth. x: 23 17 12 35 29
  86. physics

    1 0 1 2 3 4 5 6 7 8 9 b b b b b b b b time (s) velocity (m/s) Find the average acceleration during the time interval 0 s to 3 s. Answer in units of m/s 2
  87. college Algebra

    Use a calculator to find y to four decimal places, if possible. (If an answer is undefined, enter UNDEFINED.) ln y = log 9
  88. Math

    What is the circumference of a circle with a point at the center located at (7,5) and a point of the edge (7,12)? Tell me how you can find the answer!
  89. college algebra

    Use a calculator to find y to four decimal places, if possible. (If an answer is undefined, enter UNDEFINED.) ln y = log 9
  90. calculus

    i have to determine whether the series is convergent, and if, find the sum the series is from k=1 to infinity of 2/((k+1)(k+3)) I got 5/6 as my answer and didn't know if it was right...
  91. Math

    2x + 5y = 8 5x + 2y = 1 Are the line parrallel, perpendicular, or neither the answer I got was parrallel someone please help me if I am wrong. Find the domain of the function g(x) = 2/1-5x
  92. distance formula

    I need to find the distance between two points, (6,-3) and (-1,4). d = sqrt[(x2-x1)^2 + (y2-y1)^2)] I got that down to the sqrt of 98, which is the decimal 9.899494937, approximated at 9.9. Is this the right answer?
  93. Calculus

    Find inverse equation of y= 3e^(x-1)^5 Answer I got is (ln(x/3))^(1/5) +5 =y But I think it's wrong because the domain and range is really different from the original equation
  94. Algebra

    Difference of two ninbers is 5 and difference of thier reciprocal is 1/10 find the numbers. Answer: X-Y=5 X=Y+5 1/X - 1/Y = 10 1/Y+5 - 1/Y =10 LCM ....
  95. Math

    Please help me with this question. 4x^2-3x-3 = 0 has roots p, q. Find all quadratic equations with roots p^3 and q^3. I think I do know how to do it but no matter how many times I try, I could never get the right answer. Please help me!!
  96. Algebra

    I need help step by step please I keep getting a wrong answer of 252? Find the 24th term in the expansion of (a + b)^ 25
  97. Trig- Check my answer Please

    Find the unit vector in the direction of . Do not approximate any numbers in your answer. I get (-1/sqrt10) and (-3/sqrt10)
  98. stat

    Find the sample variance s2 for the following sample data. Round your answer to the nearest hundredth. x: 23 17 12 35 29
  99. English

    Find the verb. Several huge rocks had fallen onto the highway and shattered. answer: shattered
  100. Math

    A number cube with the numbers 1 through 6 is rolled. Find P (number is greater than or equal to 3). a.) 4/6 (MY ANSWER) b.) 1/6 c.) 2/6 d.) 5/6