Latest word problems

Number of problems found: 779

  • Celsius 2
    teplomer_1 5 degrees Celsius at midday dropped 12°Celsius degree by evening. What is the temperature?
  • Quadrilateral pyramid
    jehlan_4b_obdelnik Find the height and surface of a regular quadrilateral pyramid with a base edge a = 8cm and a wall height w = 10cm. Sketch a picture.
  • Triangular pyramid
    jehlan3_1 Calculate the volume of a regular triangular pyramid with edge length a = 12cm and pyramid height v = 20cm.
  • Statistical XY file
    trendline Year; money spent on advertising; profit (three values each row) 2008 2 12 2009 5 20 2010 7 25 2011 11 26 2012 15 40 1. draw a scatter diagram depicting the data. 2. calculate the Pearson's correlation coefficient. 3. determine the linear regression equat
  • Soccer teams
    lopticky Have to organize soccer teams. There are 3 age groups. How many different ways can you organize teams of ten for each age group? Is this a permutation or combination?
  • Place vector
    vectors Place the vector AB, if A (3, -1), B (5,3) in the point C (1,3) so that AB = CO
  • Insert 4
    arithmet_seq_1 Insert 3 arithmetic means between 3 and 63.
  • Harmonic oscillator
    kmity Calculate the total energy of a body performing a harmonic oscillating motion if its mass is 200 g, the amplitude of the deflection is 2 cm and the frequency is 5 Hz. Round the result to 3 decimal places.
  • Space diagonal angles
    kvadr_diagonal Calculate the angle between the body diagonal and the side edge c of the block with dimensions: a = 28cm, b = 45cm and c = 73cm. Then, find the angle between the body diagonal and the plane of the base ABCD.
  • Ascend vs. descent
    lines Which function is growing? a) y = 2-x b) y = 20 c) y = (x + 2). (-5) d) y = x-2
  • Marketing
    statistics Year; money spent on advertising; profit 2008 2 12 2009 5 20 2010 7 25 2011 11 26 2012 15 40 1. draw a scatter diagram depicting the data. 2. calculate the Pearson's correlation coefficient. 3. determine the linear regression equation.
  • Insert 3
    arithmet_seq Insert five arithmetic progression members between -7 and 3/2.
  • Insert AP member
    mean_normal Insert arithmetic means between 75 and 180.
  • A ladder
    ladder The bottom rung of a ladder is 36 inches long and the topmost rung is 24 inches long. If the ladder has 18 rungs, how many inches each other rung is shorter than the rung below it. How many feet of wood was used in making the rungs?
  • Negative difference
    arithmet_seq Find four arithmetic progression members between 7 and -6.
  • Find the mean
    mean_normal Find the number between 13 and 29.
  • Sum of odd numbers
    seq_sum Find the sum of all odd integers from 13 to 781.
  • AP members
    arithmet_seq What is the value of x2, x3, x4, x5…of the terms (of arithmetic progression) when x1 = 8 and x6 = 20?
  • What are
    seq What are the four terms between 4 and 19?
  • Two xeroxes
    xerox The performances of the two copiers are in the ratio 3: 4. A machine with higher power will make 7,200 copies in one hour. How many copies will both machines make together in 5 hours?

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