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The area and perimeter of a rectangle |
2012-03-01 |
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RAJIB pose la question :
PEREMETER OF A RECTANGLE IS 24. FIND THE AREA ?
Penny Nom lui répond. |
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The height of an equilateral triangle |
2012-02-29 |
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Carley pose la question :
Hi my name is Carley. I am an 8th garder. What us the height of an equilateral triangle si the sides are 18 cm?
Penny Nom lui répond. |
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Mr. Schneider's mass |
2012-02-29 |
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Khiya pose la question :
Mr. Schneider's mass is 2 digits. The first digit is 3 times the second digit. Both digits are odd numbers, and his mass is greater than 35 kg. What is Mr. Schneider's mass?
Penny Nom lui répond. |
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Measuring the liquid in a horizontal tank |
2012-02-28 |
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Philip pose la question :
I have a steel gas tank that is 3' dia X 5' length. The total volume is 1000 litres.
But how much is left when I use a stick and measure 6" from the bottom or 12" or 24" ??
Is there a formula to use for this task?
Thanks.
Harley Weston lui répond. |
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The weight of a steel plate |
2012-02-27 |
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david pose la question :
what is the weight of a steel plate that is 1/2" thick, 20" wide, and 45"long if the steel weigh .28 lb per cubic inch.
Penny Nom lui répond. |
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Tiling a floor |
2012-02-27 |
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jamie pose la question :
how many 16in by 16in blocks would it take to cover a 16ft by 16ft floor?
Penny Nom lui répond. |
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A max min problem |
2012-02-26 |
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Christy pose la question :
Hello, I have no idea where to start with this question.
Bob is at point B, 35 miles from A. Alice is in a boat in the sea at point C, 3 miles from the beach. Alice rows at 2 miles per hour and walks at 4.25 miles per hour, where along the beach should she land so that she may get to Bob in the least amount of time?
Penny Nom lui répond. |
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Four digit combinations from 1,2, ..., 9 |
2012-02-26 |
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Errol pose la question :
show me a list with all four digit combination numbers from 0 -9
Penny Nom lui répond. |
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Parametric equations 2 |
2012-02-25 |
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Kathy pose la question :
If the angle at time 0 is not 45 degrees how can you find the initial velocity? Ball thrown from height of 7 feet. Caught by receiver at height of 4 feet after traveling 90 feet down the field. Find initial velocity. You had a similar problem answered but the angle was 45 degrees so the cos and sin were equal and the equations were simpler to work with. Thank you!
Harley Weston lui répond. |
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A geometric sequence |
2012-02-24 |
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Camille pose la question :
Find x if the sequence 5,10,x+2 is geometric.
Penny Nom lui répond. |
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Expected value |
2012-02-24 |
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Lara pose la question :
A life insurance company sells a $250,000 1-year term life insurance policy to a 20-year-old male for $350. According to the National Vital Statistics Report the probability that the male survives the year is 0.998734. Compute and interpret the expected value of this policy to the insurance company.
I'm very confused on how to do this. I assume x is the profit the insurance company makes in the year of $350 but beyond that I don't know what to do. Thanks.
Penny Nom lui répond. |
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Integral 1/(25-x^2)^3/2 |
2012-02-22 |
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John pose la question :
Integral 1/(25-x^2)^3/2
Harley Weston lui répond. |
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The volume of an irregular tetrahedron |
2012-02-22 |
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Brittany pose la question :
If I am given an irregular tetrahedron with the coordinates of the 4 points how do I find the volume? For example I am asked to find the volume and only given the points A(-4,-3,5), B(2,-1,2), C(0,-5,0), and D(-2,0,0) can you shown me the working and formular to find the volume?
Robert Dawson lui répond. |
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Dt[sin t tan (t^2+1)] |
2012-02-21 |
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Ayu pose la question :
Ayu
Dt[sin t tan (t^2+1)]
derivatives
Harley Weston lui répond. |
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6/2(1+2)=? |
2012-02-21 |
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boyong pose la question :
6/2(1+2)=?
Harley Weston lui répond. |
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