Newest questions and responses by samuel
  1. Maths

    The total surface area of a rectangular solid is 130cm, if the solid is 7cm long and 5cm wide. Calculate the height

    asked on February 7, 2019
  2. science

    how would you determine the relative density of kerosene using a relative density bottle

    asked on January 11, 2019
  3. physics

    the earth is on average 150million km from the sun calculat its average speed in orbit

    asked on November 30, 2018
  4. algebra

    Your test scores in one class are 84 and 88 What possible scores can you earn on your next test to have a test average between 86 and 90 ​inclusive?

    asked on September 24, 2018
  5. physics

    the movement of a couple of 100N but 2.5m apart is

    asked on August 12, 2018
  6. Computer C++ Programing

    Using the if… else if, write a menu-driven program that permits the user to select one of the metric conversions: Lengths Weights Volumes Areas Use the following conversions: For Length: Inches to centimeter (1 inch = 2.54 cm) Yards to meters (1 yard =

    asked on April 6, 2018
  7. Programing

    Using the if… else if, write a menu-driven program that permits the user to select one of the metric conversions: Lengths Weights Volumes Areas Use the following conversions: For Length: Inches to centimeter (1 inch = 2.54 cm) Yards to meters (1 yard =

    asked on April 5, 2018
  8. math

    the minute hand of a clock is 6cm far does the end of the hand travel is 35minute

    asked on March 3, 2018
  9. Math

    What is the height of an equilateral triangle with a side length of 6

    asked on February 25, 2018
  10. science

    A 40W bulb is switched on. It burns out brighter when it was switched on than a short time later.What account for this change in brightness

    asked on February 13, 2018
  11. science

    Two charged particles are 8.5cm apart .They moved and the force on each of them is found to be tripled .How far apart are they now

    asked on February 13, 2018
  12. math

    Using the vertices: B(-9,1), E(2,3), F(12, -2), G(1,-4). Determine whether BEFG is a rhombus, a rectangle, or a square. List all that apply and show the steps

    asked on February 1, 2018
  13. math

    Determine whether the figure with vertices R (-2, 5); O( 1,3); M(-3, -4); Y(-6,-2) is a parallelogram. Use the Distance and Slope Formulas.

    asked on February 1, 2018
  14. math

    For the following regular polygons, find the following, round to the nearest tenth, if necessary. 1. 24-gon 2. 30-gon 3. Polygon with 40 sides

    asked on January 26, 2018
  15. Science

    How is the equator similar to the prime meridian?

    asked on January 6, 2018
  16. math

    Find the perimeter of the given triangle. Round your answer to the nearest tenth if necessary. ∆BCH, if ∆CBH ∼ ∆FEH, ADEG is a parallelogram, BH = 4, HE = 7, EF = 25, and HF = 24.

    asked on December 16, 2017
  17. math

    Find the equation of the line that passes through (-2,-4), (1,-3) is it y=1/3x + -2 or y=1/3x+-10/3

    asked on December 14, 2017
  18. math

    A=P+Prt solve for t I don't know if it is either t= (a-p)/pr or t=-(1/r)+(A/Pr) or is it a completely different answer? Thank you in advance!!!

    asked on December 14, 2017
  19. Algebra

    a. For the first company, express in words the amount the cab company charges per ride and per mile. Charge per ride: $3 per mile $0.50 b. Write an equation in slope-intercept, point-slope, or standard form. Explain why you chose the form you did.

    asked on December 12, 2017
  20. Math

    You write 5 1⁄2 pages of a report in 2 1/3 hours. What is the average number of pages you write per hour?

    asked on December 10, 2017
  21. Science

    The two variables of interest in this lab are: "percent change in mass" of bag and "sucrose molarity" in the bag solution. On a graph of these two variables, which would be the independent variable, and which would be the dependent variable?

    asked on December 1, 2017
  22. Math

    Show that if the diagonals of a quadrilateral are perpendicular, then its area is half the product of the diagonals. What kind of drawing do I do? And how doI solve this? Thank you!

    asked on November 27, 2017
  23. Arithmetic

    A geometric series has a positive common ratio of r. The series has a sum to infinity of 9 and the sum of the first two terms is 5. Find the first four terms of the series.

    asked on November 25, 2017
  24. Arithmetic

    The sum of three consecutive terms of a geometric progression is 42, and their product is 512. Find the three terms.

    asked on November 25, 2017
  25. math

    Simplify each expression so that no negative exponents appear in the final result. Assume that all variables represent nonzero real numbers. 1. (12k^-2(k^-3)^-4)/(6k^5) 2. (3rs^-2)/(3^2r^2s^-4)

    asked on November 17, 2017
  26. math

    In a random sample of 200 students who were asked their favorite color, it was found that twenty more students liked blue than purple and eight fewer liked green than blue. Find the number of students who chose each color as their favorite. I posted this

    asked on November 6, 2017
  27. math

    Write a system of equations, three equations/three unknowns, that has (1, 2, 3) as the solution. for this can I just write any random coefficient and then put that as equal to 1,2 or 3? or if not what type of math would I use?

    asked on November 6, 2017
  28. math

    In a random sample of 200 students who were asked their favorite color, it was found that twenty more students liked blue than purple and eight fewer liked green than blue. Find the number of students who chose each color as their favorite.

    asked on November 6, 2017
  29. Math

    Of the students in a certain classroom, 9 are in the school play, 12 are in the orchestra, and 15 are in the choral group. If 5 students participate in exactly 2 of the 3 activities and all other students participate in only 1 activity. How many students

    asked on October 12, 2017
  30. Math

    I am 10years old my sister is 4years,in how many years shall i be twice as old as she will be?

    asked on September 3, 2017
  31. Social Studies

    Victory at which Battle convinced the British to help the Americans? I'm thinking its the Battle of Saratoga

    asked on August 14, 2017
  32. Math

    In a circle whose center is O, arc AB contaisn 100 degrees. Find the number of degrees i angle ABO?

    asked on July 24, 2017


    asked on June 26, 2017
  34. maths

    From point AandB on level ground,the angle of elevation of the top of a building are 25degree and 37degree respectively.if |AB|〓57m,calculate,to the nearest metre,the distances of the top of the building from AandB if they are both on thesame side of the

    asked on June 8, 2017
  35. statistics

    a survey from teeneage research unlimited found that 30% of teenage consumers receive their spending money from parttime jobs. If 5 teenagers are selected at random, find the probability that at least 3 of them have part time jobs

    asked on March 22, 2017
  36. Algebra

    1/3 of a number is added to 5. the result is one and half times the original number.find the number.

    asked on February 11, 2017
  37. further maths

    given that p=i+j-2k and q=2i-j+2k.find two vectors m and n satisfying that m is perpendicular to p,n is parallel to p and m+n=q

    asked on January 5, 2017
  38. Surds

    Write (2+3^1/2)^1/2 in the form root a plus root b ..and find a and b

    asked on December 31, 2016
  39. Math

    Austin pays $1.50 per day for high speed internet after paying the equipment fee of $35.00. Identify the constant of proportionality that relates his internet charges (y) to the number of days (x) he has internet.

    asked on December 30, 2016
  40. physics

    (1) a car travelling at a constant speed of 20ms-1 overcomes a constant frictional resistance of 300N. What is the horse power of the engine? ( take 1h.p = 3/4 kw)

    asked on November 21, 2016
  41. Physics

    A tennis ball is thrown with a velocity of 30m/s at an angle of 60^ of the horizontal calculate the time,m/s,and the range

    asked on November 9, 2016
  42. English Beowulf

    How did the culture of Beowulf view pride? Why?

    asked on October 31, 2016
  43. Physics

    The density of copper is 9.8 kilograms per meter cube and the density of gold is 1.9 kilograms per meter cube. When two wires of these metals are held under the same tension, the wave speed in the gold is found to be half that in the copper wire. What is

    asked on October 8, 2016
  44. maths sir-reiny help calculus

    solve the differential equation (x^2-xy+y^2)dy-xydx=0 plz show me working

    asked on October 1, 2016
  45. calculus help me pllllllllllz

    Find out what kind of improper integral is given below §dx/{x^4+4}....?,hence evaluate the integral with upper boundary=infinity lower boundary =0 i need help plz show me full work

    asked on September 26, 2016
  46. maths need help

    the transverse of the conic:3x^2-y^2+2y-1=0 is ???

    asked on September 25, 2016
  47. science

    A concave lens or focal lens 10cm produce an erect image 40cm from the lens .Determine the object distance and magnification.

    asked on August 30, 2016
  48. Probability

    Find the probability that a committee of 10 people chosen from an organization consisting of 40 doctors and 35 dentists will include 3 doctors and 7 dentist. 40c10 + 35c10 not sure what to do after setting it up. Need help

    asked on June 24, 2016
  49. Chemistry

    In the zinc-copper cell, Zn(s) | Zn^+2(1M) || Cu^+2(1M) | Cu(s), which electrode is negative? Cu^+2 Cu(s) Zn(s)*** Zn^+2

    asked on May 31, 2016
  50. Chemistry

    What is the oxidation half reaction for the following equation: Cr2O7^-2 +Fe+2 - - > Cr^+3 + Fe^+3 Cr^+3 - - > Cr2O7^-2 Fe^+2 - - > Fe^+3 Fe^+3 - - > Fe^+2 Cr2O7^-2 - -> Cr^+3***

    asked on May 31, 2016
  51. Chemistry

    What is the reducing agent in the following reaction? 2K + S - - > K2S K*** S K2S None of these

    asked on May 31, 2016
  52. physics

    A piece of copper of mass 40 grams at 20 degrees Celsius is placed in a copper calorimeter of mass 60 grams containing 50 grams of water at 10 degrees Celsius .ignoring heat losses,what will be the final steady temperature after stirring?(specific heat

    asked on May 29, 2016
  53. calculus-help.. .Me

    if y=e^(-kt)[Acosh(qt)+Bsinh(qt)] where A,B,q and k are constant show that d^2y/dt^2+2kdy/dt+(k^2-q^2)y=0 step plz thanks

    asked on May 24, 2016
  54. expansion help

    find the series of the expansion (1+(1/x^3)) help!!!!

    asked on May 21, 2016
  55. physic

    Two forces of magnitude 4.ON ans 7.0N act on a small object b. The angle btw the direction along which the force is 50 degree.determine the magnitude *nd direction of d resultant force on d body b.

    asked on May 15, 2016
  56. physic

    Two forces 5N and 10N act on a body in the direction due North and east respectively at an angle 75 degree. Calculate the resultant force of the inclined angle.

    asked on May 15, 2016
  57. chemistry

    what will haprn if ammonium chloride solution is used to standardize potassium tetraoxamaganate VII solution instead of ammonium iron II sulphate

    asked on May 11, 2016
  58. calculus help

    integrate:dx/(3x^3-5)^3 help plz show step

    asked on May 6, 2016
  59. calculus plz help me

    integrate:dx/((x-1)sqrt(x^2-2) plz show solution i plead

    asked on May 5, 2016
  60. Economics!

    Suppose a chemical company is in a perfectly competitive industry and has a short run total cost curve of TC = q3 + 5q2 + 10q + 10 and a short run marginal cost of SMC = q2 + 10q + 10. At the price of 49, how many will be produced?

    asked on May 4, 2016
  61. math

    calculate the volume of the solid when the composite of a cube of edge is 28cm and the square -based pyramid of it height is 16cm

    asked on April 18, 2016
  62. math

    p=5x3^n can you answer this

    asked on April 13, 2016
  63. math

    make a table and graph each quadratic function. use integers from -3 to 3 inputs 1. y=-x^2 2. y=2x^2 3. y=-8x^2 4. x^2 + 2

    asked on April 11, 2016
  64. Probability

    The letters in the word MATHEMATICS are arranged randomly. What is the probability that the first letter is E? Preview What is the probability that the first letter is M?

    asked on March 25, 2016
  65. Probability

    A computer password is required to be 9 characters long. How many passwords are possible if the password requires 2 letter(s) followed by 7 digits (numbers 0-9), where no repetition of any letter or digit is allowed?

    asked on March 25, 2016
  66. english,maths,chem,phy,bio,agric,civic,etc

    What are the equations of motion.

    asked on March 13, 2016
  67. life orientation

    indetify three courses are interested after grade 12

    asked on March 13, 2016
  68. Math

    How do i solve for b. 5=2pi/b

    asked on March 4, 2016
  69. Math

    How do i find out the sin and cos equation of a sinusoidal graph?

    asked on March 2, 2016
  70. Math

    How do i find "d" and "c" values in y=cos(x+(pi/2)) Base equation is y= A cos B (x +- C) +- D

    asked on March 2, 2016
  71. Math

    How do i find the asymptotes of: y=(1/x-4)+3

    asked on February 29, 2016
  72. Math

    How do i find asymptotes without graphing?

    asked on February 26, 2016
  73. Physics

    How much heat is absorved when a temparature of a piece of iron of mass 0.1kg and specific heat capacity 2*10 rest to power of 2 J/kg/k is rise from 25degree celcius to 75degree celcius

    asked on February 20, 2016
  74. physics

    A stone of mass 0.7kg is projected vertically upward with a speed of 5m/s.calculate the maximum height reached. [Take g=10m/s^2 and neglect air resistance]. "

    asked on February 13, 2016


    asked on January 30, 2016
  76. Science

    A compound on analysis as 87:8% c,12:2%h determine its empirical formular&molecular formular given mass=56gmol

    asked on January 25, 2016
  77. Chemistry

    A compound on analysis as 87:8% c,12:2%h determine its empirical formular&molecular formular given mass=56gmol

    asked on January 25, 2016
  78. calculus

    Find the minimum distance between the curves y=e^x and y=lnx. Hint: Use the fact that e^x and lnx are inverse relationships. I have no idea where to start. Thanks!

    asked on January 18, 2016
  79. math

    The perimeter of a rectangular concrete patio is 38 meters. The area is 90 square meters. What are the dimensions of the patio?

    asked on January 14, 2016
  80. math

    the horizontal,vertical and diagonal columns and rows of a magic square all add to the same sum.use the digits 1-16 one time each to make a magic square

    asked on January 14, 2016
  81. physics

    a car which weight is 1000N is travelling at 90kmn/hr and come to rest in a distance of 50m after applying the brakes. assume uniform acceleration, calculate how large its stopping force was exerted by the friction between the wheel and the road.

    asked on December 16, 2015
  82. Math

    a 6.5 ounce can of tuna for $1.39 or a 3 ounce can of tuna for $0.65. the 6.5 ounce can of tuna costs ________ the 3 ounce can of tuna costs __________ the ______ ounce can of tuna is the better buy

    asked on December 9, 2015
  83. logics in programming

    for A=1 to 30

    asked on December 9, 2015
  84. Elective maths

    A particle P of mass 7kg is suspended by two inextensible strings AP,BP of lengths 40cm and 75cm respectively. The ends, AP of the strings are attached to two point at the same level, whose distance apart is 85cm. Find angle APB and the magnitude of the

    asked on October 6, 2015
  85. physics sl

    A dead dog of mass 2.2 kg and an initial speed of 5.5 m.s-1 slides along a rough horizontal surface and stops after travelling 4.2 m. calculate the frictional force between the dog and the surface (Think of the work the friction has to do to stop the dog

    asked on October 4, 2015
  86. math

    What are the steps to show the quotient in simplest form? 0.000027/0.000009

    asked on September 30, 2015
  87. math

    A certain computer can perform 10^5 calculations per second. how many calculations can it perform in 10 seconds

    asked on September 30, 2015
  88. Chemistry

    If an aquarium tank holds 100 litres of water, calculate how much heat energy would be required to heat the tank from 18.2 Degrees(C) to 32 Degrees(C)

    asked on September 11, 2015
  89. Chemistry

    The solubility of potassium nitrate at 20¡ãC is 340g/litre. How many grams of KNO3 can dissolve in 185ml of water?

    asked on September 7, 2015
  90. mathematics

    A man takes a 500km trip in his car, He rotates his tyres (four on the car and one spare) so that in the end of the trip each tyre has been used for the same number of kilometres. How many kilometres did each tyre cover?

    asked on August 28, 2015
  91. English

    In Fahrenheit 451, what pages are these words found on? I really need help just with this. It would be nice to help me out. Here are the words. Part 1: Abruptly, intact Part 2: certitude, darkling, dispersing, linguists, moor, televisors Part 3: scuttling

    asked on July 12, 2015
  92. Science

    4g of an organic compound gave 2.34g of carbon 0.16g of hydrogen 0.46g of nitrogen 1.04g of oxygen.what is the empirical formula

    asked on June 22, 2015
  93. math

    During the summer holidays,your brother earns extra money mowing lawns.He mows 6 lawns an hour and has 21 lawns to mow.How long will it take him?

    asked on April 7, 2015
  94. math

    A diver on a platform 40 feet in height jumps upward with an initial velocity of 5ft/s. His height in h feet after t seconds is given by the function h=-16t^2+5t+50. a. What is his maximum height? I got 50.39 b. How long will it take him to reach the

    asked on March 25, 2015
  95. Math

    I have the same problem as Marita. Can someone tell us what equation to use. Horizon has a cell phone plan for $28.00 per month plus $.30 per minute with unlimited anytime network minutes and a free flip phone for new customers. How do I put this in an

    asked on March 8, 2015
  96. physics

    isolate for f 1/di = 1/f - 1/do show all the steps pls

    asked on February 8, 2015
  97. physics

    isolate for t s = ut + 1/2at^2 please show all ur steps  

    asked on February 8, 2015
  98. physicss

    state the precision of the measured quantities 1. 0.07 m 2. 908 s 3. 7.60 L 4. 0.005 0 mm answers: 1. 0.01 m 2. 1 s 3. 0.01 L 4. 0.0001 mm i do not understand this , please explain it to me

    asked on February 4, 2015
  99. physics

    state the precision of the measured quantities 1. 353g 2. 6.00cm please explain

    asked on February 4, 2015
  100. algebra 1

    a heavy freight train made a trip of 360 miles, running part of the distance at 54 miles an hour and the rest at 48 miles an hour. if the entire trip took 7 hours, find the distance traveled at each rate

    asked on February 2, 2015


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