carl

Popular questions and responses by carl
  1. Maths

    The sides of the equilateral triangle is 3x+2,2y-x and y+3 find x and y.and the perimeter of the triangle

    asked on June 1, 2018
  2. stat

    for randomly selected adults, IQ scores are normally distributed with a standard deviation of 15. the scores of 14 randomly selected college students are listed below. use a 0.10 significance level to test the claim that the standard deviation of IQ scores

    asked on May 14, 2012
  3. math

    A car left from Uphere at 9:00 am and arrived at Downthere, 340 km away at 1:15 pm the same day. Find the average speed of the car in kilometers per hour.

    asked on July 21, 2020
  4. math

    The median of a set of 8 consecutive even integers is 61. What is the largest integer in the set?

    asked on December 4, 2017
  5. Trig

    Which trigonometric function can equal or be greater than 1.000? A Sine B Cosine C Tangent D none of the above

    asked on December 13, 2011
  6. Physics

    Two objects are moving in the xy-plane. Object A has a mass of 3.2 kg and has a velocity of Va= (2.3 m/s)i + (4.2m/s)j and object B has a mass of 2.9 kg and has a velocity of Vb= (-1.8m/s)i + (2.7m/s)j. What is the total momentum of the system? (should I

    asked on November 9, 2014
  7. Physics electric potential energy difference

    A current loop with radius 20 cm and current 2 A is in a uniform magnetic field of 0.5 T. Considering all possible orientations of the loop relative to the field, what is the largest potential energy difference (in Joules) you can find between two

    asked on November 22, 2013
  8. physics

    water leaves a hose at a rate of 1.5kg/s with a speed of 20m/s and is aimed at the side of a car, which stops it (splashing back is ignored). what is the force exerted by the water on the car?

    asked on August 28, 2012
  9. Physics

    Two objects are moving in the xy-plane. No external forces are acting on the objects. Object A has a mass of 3.2 kg and has a velocity of Va= (2.3 m/s)i + (4.2m/s)j and object B has a mass of 2.9 kg and has a velocity of Vb= (-1.8m/s)i + (2.7m/s)j. Some

    asked on November 9, 2014
  10. English II B

    Need Help Please. A student is thinking about different forums for publishing an editorial. Which of the following would be appropriate? 1.a dramatic reading 2.an anthology 3.a poetry contest 4.a school newspaper

    asked on April 3, 2014
  11. math

    in triangle ABC, AB=6, BC=12 AND AC=X. Which of the following cannot be a value of x? a. 6 b.7 c.8 d.9 e.10

    asked on September 21, 2013
  12. Dynamics

    A stone has an initial velocity of 100 fps up to the right at 30 degrees with the horizontal. The components of the acceleration are constant at ax=-4 fps^2 and ay=-20 fps^2. Compute the horizontal distance covered until the stone reaches the point 60 ft

    asked on July 14, 2018
  13. Math

    Can someone please explain to me how to solve this: Simplify 6P2. A) 30 B) 15 C) 12 D) 720

    asked on April 23, 2015
  14. Calculus (math)

    A rescue cable attached to a helicopter weighs 2 lb/ft. A 190 lb man grabs the end of the rope and is pulled from the ocean into the helicopter. How much work is done by lifting the man if the helicopter is 50 ft above to water.

    asked on April 26, 2013
  15. math

    You roll 2 dice. The first die has 26 sides and contains the 26 letters of the English alphabet; the other die has 12 sides and contains numbers 1-12. What is the probability that you will roll a letter with one enclosed area (A, D, O, P, Q, R) and a

    asked on June 29, 2020
  16. Geometry

    A swimming pool is to be constructed in the space of partially overlapping identical circles. Each of the circles has a radius of 9 m, and each passes through the center of the other. Find the area of the swimming pool.

    asked on September 28, 2014
  17. calculus

    What is the length of the blue line labeled r in the image below? Give your answer in terms of a and b. blue line labeled r starting at the origin and ending at a point a,b b|------------| | /| | / | | / | | / | | / | | r / | | / | | / | | / | | / | | / |

    asked on September 28, 2011
  18. math

    Water is pumped into a cylindrical tank, standing vertically, at a decreasing rate given at time minutes r(t) = 130 - 10t ft^3/min for 0≤t≤5.The tank has radius 6 ft and is empty when t=0. Find the depth of the gasoline in the tank at t=3.

    asked on August 23, 2018
  19. Dynamics

    A boy running a foot race rounds a flat curve of 50 ft radius. If he runs at rate of 15 mph, at what angle with the vertical will be inclined his body? A.) 16.75° B.) 13.67° C.) 76° show solution step by step thanks

    asked on July 14, 2018
  20. Geometry

    A 12-foot ladder is leaning against the outside wall of a building. The angle of the ladder with the ground is 75 degrees. The ladder is moved so that the base of the ladder is 5.8 feet from the wall. Determine the angle created by the ladder and the

    asked on December 8, 2017
  21. Chemistry

    How does the three dimensional structure of SP3 bonds of Carbon, Nitrogen, Oxygen and Fluorine cause them to form polar or non-polar molecules? The answer must include a 3d diagram of the molecules, and a discussion of the effect of their electron

    asked on November 16, 2017
  22. Math

    What function should be used to maximize the volume of an open box that has a surface area of 24 and has a square bottom? Not sure how to do this, a step by step answer would be great. Thanks!!

    asked on August 19, 2016
  23. smu

    In a bumper test, three types of autos were deliberately crashed into a barrier at 5 mph, and the resulting damage (in dollars) was estimated. Five test vehicles of each type were crashed, with the results shown below. Research question: Are the mean crash

    asked on December 19, 2011
  24. Trig

    In ABC, vertex C is a right angle. Which trigonometric ratio has the same trigonometric value as Sin A? A Sin B B Cosine A C Cosine B D Tan A

    asked on December 13, 2011
  25. geometry

    The sum of the measures of the interior angles in a polygon is 540 degrees. How many sides does the polygon have?

    asked on December 13, 2010
  26. math

    What 2D figure would result if you sliced a right rectangular prism horizontally?

    asked on June 30, 2020
  27. math

    what is the result when you add 0 to both sides of an equation?

    asked on June 26, 2020
  28. Algebra

    If (4,2) is a point on the graph of y=f(x), which of the following points must be on the graph of y=f(2x). a) (4,1) b) (8,2) c) (2,2) d) (4,4)

    asked on September 10, 2019
  29. math calculus

    Let f be twice differentiable with f(0)=12, f(3)=9, and f '(3)=4.Evaluate the integral upper limit 3 and lower integral 0 xf'' (x)dx

    asked on September 13, 2018
  30. Physics

    During a typical afternoon thunderstorm in the summer, an area of 76.0 km2 receives 1.42 * 10^9 gal of rain in 18 min. How many inches of rain fell during this 18 min period?

    asked on August 28, 2018
  31. Math

    t) Let a , b , c and y be the three dimensional vectors a =4j +2k ,b =−3i +4j +4k ,c =3i −j ,y =8i −7j Perform the following operations on these vectors: (a) c⋅a +a⋅y = (b) (a ⋅b )a = (c) ((c⋅c)a )⋅a =

    asked on May 6, 2018
  32. Algebra

    Randall wants to mix 57 lbs of nuts worth $1 per lb with some nuts worth $6 per lb to make a mixture worth $5 per lb. how many lbs of $6 nuts must he use?

    asked on May 20, 2016
  33. English II B

    A student has completed a freewriting exercise. The result is a paragraph exploring the general theme of war in a literary text. What is the next step in the writing process? 1.gathering details 2.beginning an outline 3.writing an introduction 4.narrowing

    asked on April 3, 2014
  34. English II B

    What is the term for a magazine that is published on the computer? 1. computerized slide show 2. online publication 3. electronic portfolio 4. electronic bulletin board

    asked on April 3, 2014
  35. Us history

    Define unicameral legislature and bicameral legislature. Which type of legislature did must states have? I cant find what type of legislature did the states have

    asked on October 13, 2013
  36. algebra

    A boat can travel 114 miles upstream in the same time that it can travel 186 miles downstream. If the speed of the current is 6 miles per hour, find the speed of the boat without a current.

    asked on August 17, 2011
  37. math

    solve the equation by factoring. 3x(x-5)=6x^2-16x

    asked on September 10, 2011
  38. Calculus

    1/f = 1/p + 1/q What is the rate of change of p with respect to q if q=2 and f=4?

    asked on October 10, 2008
  39. Math

    Troy measures the length of a toy dog in centimeters. It is 6 centimeters long. He measures again to find the measurement in inches. The toy dog is how many inches?

    asked on April 24, 2020
  40. math

    1.integral cos(x)sqrt(sin(x))dx. upper limit pi and lower limit 0 2.integral 1/sqrt(x)(sqrt(x) +1)^2. Upper limit is 4 and lower limit is 1.

    asked on September 10, 2018
  41. Physics

    The average distance between Earth and the Sun is 1.5 ✕ 10^11 m. a) Calculate the average speed of Earth in its orbit (assumed to be circular) in meters per second. b) What is this speed in miles per hour?

    asked on August 26, 2018
  42. Math

    Differentiate y=13x^2-5x+8

    asked on July 25, 2018
  43. Social Studies

    Tax money that is spent in the community y is called an ____tax

    asked on April 24, 2018
  44. math

    arctan(y)=x+c To solve for y, would it just be: y=tan(x+c)?

    asked on January 17, 2017
  45. Algebra

    The Pi (π) Club at Math High School was planning a fundraiser to sell pepperoni pizza. A pizza company donated enough ingredients to make the equivalent of 300 extra large pepperoni pizzas (16” diameter). In trying to determine the number of pizzas of

    asked on June 22, 2016
  46. calculus

    You have been hired by a farmer to design a fenced-in rectangular enclosure for emus. The emus will require 720 square feet of area in which to roam, and the fence will cost 20 dollars per foot. The rectangular area will adjoin an existing wall, so a fence

    asked on November 17, 2015
  47. Chemistry

    Calculate the pH of the the solution that results from titrating 50 mL of 0.6 M HCN(aq) with 0.2 M NaOH At 0.00 mL of NaOH At 85 mL of NaOH. At 150 mL NaOH. At 160 mL of NaOH

    asked on March 12, 2015
  48. Algebra

    Factor: -3x^2 - 18x + 15

    asked on February 15, 2015
  49. math

    the width of a rectangle is 4cm and the length is 8 cm if both the width and the length are increased by equal measures, the area of the rectangle is increased by 64 cm 2. find the length and width of the larger rectangle

    asked on October 26, 2014
  50. Physics

    A 2050 kg truck is traveling east through an intersection at 2.3 m/s when it is hit simultaneously from the side and the rear. (Some people have all the luck!) One car is a 1200 kg compact traveling north at 4.5 m/s. The other is a 1600 kg midsize

    asked on March 9, 2014
  51. Scientific Notation

    I got all of them so far EXCEPT this one... help? Thank you! Convert the following into scientific notation: 1/137

    asked on January 23, 2013
  52. Math (URGENT)

    write a formula that gives you the number of regions formed when x points are placed on a circle and all possible chords are drawn. ex. 2pts has 2 regions, 3pts has 4 regions, 5pts has 17 regions

    asked on January 6, 2011
  53. Math

    write a formula that gives you the number of regions formed when x points are placed on a circle and all possible chords are drawn. ex. 2pts has 2 regions, 3pts has 4 regions, 5pts has 17 regions

    asked on January 6, 2011
  54. algebra 2

    teresa and julia are among 10 students who have applied for a trip to washington DC. Two students from the group will be selected at random for the trip. What is the probability that teresa and julia will be the 2 students selected /

    asked on April 23, 2009
  55. science

    Whats the best site to go on if you want to learn about the elements?

    asked on March 19, 2009
  56. Calculus

    If d/dx(f(3x^5))=9x^4 Find f'(x)

    asked on October 13, 2008
  57. Calculus

    C(x) = 16x^(1/2) + x^2/1000 Find x to meet the minimum cost

    asked on October 13, 2008
  58. Calculus

    C(x)= 16sqrt(x) + (x^2)/1000 Find the production level that will minimize the average cost

    asked on October 10, 2008
  59. Math

    How do I express these in scientific notation AND Log10 form? 1) ln(8.1) 2) 32.8 x 10^-2 + 3.15 x 10^-1 3) 10^-2 x 10^4.5 4) 10^-45 5) 8^2.34 Please show some effort, and please stop posting under multiple names.

    asked on January 21, 2007
  60. Math

    How do I express these in scientific notation AND Log10 form? 1) ln(8.1) 2) 32.8 x 10^-2 + 3.15 x 10^-1 3) 10^-2 x 10^4.5 4) 10^-45 5) 8^2.34 I will be happy to critique your work here. Most of these require conversion. Do the math, and let your calculator

    asked on January 21, 2007
  61. math

    what is the result when you add 0 to both sides of an equation? I asked this already, but I would like a deeper explination

    asked on June 26, 2020
  62. Math

    Two spheres are used in a certain machine. One has a volume of 7 cm3 and the other has a volume of 189 cm3. The radius of the small sphere is what fraction of the radius of the large sphere?

    asked on May 12, 2020
  63. Math

    The four shapes to the right are each drawn with a horizontal base and a vertical height. Figure A is a right-angled triangle, Figure B is an isosceles triangle, Figure C is a square, and Figure D is a rectangle. The figures are not drawn to scale. Using

    asked on May 12, 2020
  64. Biology

    A farmer plants a field of corn and fertilizes it with a low-nitrogen fertilizer. The corn receives plenty of sunlight and water but does not grow well. What might be preventing the corn from growing?

    asked on March 23, 2020
  65. Algebra

    If (4,2) is a point on the graph of y=f(x), which of the followint points must be on the graph of y=f(2x).

    asked on September 10, 2019
  66. precalc

    how to find difference quotient for: f(x) = 1/x+3

    asked on August 29, 2019
  67. Precalc

    find difference quotient f(x) = 1/x+3

    asked on August 29, 2019
  68. Science

    Common suspension and their uses

    asked on June 18, 2019
  69. Genealogy

    What is the best free of charge way to look up past birth records?

    asked on May 28, 2019
  70. science

    Can someone describe how a sound wave travels through a medium to create sound. Can you also provide a descriptions of vibrations, longitudinal waves, compressions, rarefactions, and direction of movement in your response. That way I could understand it

    asked on May 15, 2019
  71. science

    why is it advisable to use plasticwares instead of the conventional glasswares in spectrophotometry?

    asked on May 12, 2019
  72. science

    if 2 north poles are brought together, is the resultant pole strength of the combination equal to the sum of their pole strengths?

    asked on May 3, 2019
  73. Science

    When a bar magnet is cut into two halves repel each other. Why? What becomes of the original north and south poles of that magnet??

    asked on May 3, 2019
  74. Science

    Index of refraction is defined as the ratio of the speed of light in free space and its speed in the medium. What is the speed of light in a medium with n= 1.33?

    asked on May 2, 2019
  75. Science

    A ray of light hits a plane mirror lying across a floor 2m from the vertical wall. The angle of incidence of the ray is 40 degrees. At what point on the wall will the reflected light fall? Express the answer in terms of height from the floor.

    asked on May 2, 2019
  76. Math

    convert feet and inches to only feet. a) 17 ft 6 in

    asked on March 8, 2019
  77. Social Studies

    How did the role of the church in education change over time? A. Universities changed from being independent to being part of the church. B. Priests became the only teachers at universities. C. Schools began to provide education beyond religious

    asked on January 7, 2019
  78. math

    Find a substitution w and constants k,n so that the integral x^2sqrt(1-4x^3)dx has the form ∫kw^n dw .

    asked on September 13, 2018
  79. math

    Find the integral given below. integral cos^2(7x+1)dx

    asked on September 12, 2018
  80. math

    Find the exact value of integral t^2(2)^(-t^3). Upper limit is 1 and lower limit is 0.

    asked on September 9, 2018
  81. math

    Integrate following integrals. 1.integral ax+b/(sqrt(ax^2+2bx+c)dx 2.integral 1+x/(1+x^2)dx 3.integral e^x+1/e^x dx

    asked on September 8, 2018
  82. math

    Evaluate the integral given below. integral(x^2+13)^2dx

    asked on September 8, 2018
  83. math

    Find the integral given below. 7xe^(−4x^2)dx

    asked on September 7, 2018
  84. math

    (a) Find the general solution of the differential equation d y/d x =10x+5 (b) Find the solution satisfying y(1)=13

    asked on September 7, 2018
  85. Physics

    A commonly used unit of mass in the English system is the pound-mass, abbreviated lbm, where 1 lbm = 0.454 kg.What is the density of gasoline in pound-mass per cubic foot? (Assume the density of gasoline is 7.40 ✕ 10^2 kg/m3.)

    asked on August 27, 2018
  86. Physics

    Tectonic plates are large segments of the Earth's crust that move slowly. Suppose that one such plate has an average speed of 7.5 cm/year. a)What distance does it move in 1 s at this speed? b)What is its speed in kilometers per million years?

    asked on August 27, 2018
  87. Physics

    During a typical afternoon thunderstorm in the summer, an area of 76.0 km2 receives 1.42 * 10^9 gal of rain in 18 min. How many inches of rain fell during this 18 min period?

    asked on August 27, 2018
  88. Math

    Calculate the indicated Riemann Sums for the function g(x)=4-x^2 a)one rectangle b)two rectangles

    asked on July 24, 2018
  89. Math

    Find the equations of the tangent lines to the following curves at the indicated points. xy^2 = 1 at (1, −1)

    asked on June 27, 2018
  90. Math

    Compute the angle between the vectors i −j +k and −i −j −k . angle=

    asked on May 6, 2018
  91. Math

    The average length of the eight words Betty was asked to spell was 9 letters. The first seven words had the following lengths: 8 letters, 9 letters, 6 letters, 10 letters, 7 letters, 9 letters, and 11 letters. What was the length of the eighth word?

    asked on April 21, 2018
  92. math

    I have supplementary angles where the measure of one angle is ¼ the measure of the other. What is the measure of the larger angle? What is the measure of the smaller angle?

    asked on February 25, 2018
  93. math

    In a class of 20 students, the average (arithmetic mean) score on a test is 84 points. If 6 students each scored 100 points and 4 students each scored 50 points, what is the average of the scores of the remaining students?

    asked on February 24, 2018
  94. math

    56 is 15.625 percent of what number?

    asked on February 20, 2018
  95. math

    A student’s score on the first four mathematics tests of the year were 80, 95, 92 and 89. What must the student score on the fifth test so that the mean score for all five tests is exactly 90?

    asked on February 8, 2018
  96. English

    So I'm looking for a work of art (painting, movie, literature, poem, etc.) from 1990 to modern day that has one of these traits: - Feelings or intuition over reason - Champions individual freedom and worth of the individual - Civilization as artificial -

    asked on December 8, 2017
  97. math

    50 is what percent of 13?

    asked on December 5, 2017
  98. math

    What is the area of a quadrilateral with vertices at (1, 1), (4, 1), (7, 5) and (4, 5)?

    asked on December 4, 2017
  99. math

    William is traveling at a rate of 75 miles per hour. How fast is William traveling in feet per second?

    asked on December 4, 2017
  100. math

    If you buy a pair of shoes on sale for $48. The price is discounted 25% and the sales tax is 7%. Which of the follwoing statements would be true? Answer choices 1. The final price would be lower if you add the 7% sales tax first and take the 25% discount

    asked on December 4, 2017

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