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The area and perimeter of a rectangle |
2012-03-01 |
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From RAJIB:
PEREMETER OF A RECTANGLE IS 24. FIND THE AREA ?
Answered by Penny Nom. |
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The height of an equilateral triangle |
2012-02-29 |
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From Carley:
Hi my name is Carley. I am an 8th garder. What us the height of an equilateral triangle si the sides are 18 cm?
Answered by Penny Nom. |
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Mr. Schneider's mass |
2012-02-29 |
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From Khiya:
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?
Answered by Penny Nom. |
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Measuring the liquid in a horizontal tank |
2012-02-28 |
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From Philip:
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.
Answered by Harley Weston. |
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The weight of a steel plate |
2012-02-27 |
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From david:
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.
Answered by Penny Nom. |
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Tiling a floor |
2012-02-27 |
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From jamie:
how many 16in by 16in blocks would it take to cover a 16ft by 16ft floor?
Answered by Penny Nom. |
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A max min problem |
2012-02-26 |
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From Christy:
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?
Answered by Penny Nom. |
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Four digit combinations from 1,2, ..., 9 |
2012-02-26 |
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From Errol:
show me a list with all four digit combination numbers from 0 -9
Answered by Penny Nom. |
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Parametric equations 2 |
2012-02-25 |
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From Kathy:
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!
Answered by Harley Weston. |
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A geometric sequence |
2012-02-24 |
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From Camille:
Find x if the sequence 5,10,x+2 is geometric.
Answered by Penny Nom. |
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Expected value |
2012-02-24 |
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From Lara:
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.
Answered by Penny Nom. |
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Integral 1/(25-x^2)^3/2 |
2012-02-22 |
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From John:
Integral 1/(25-x^2)^3/2
Answered by Harley Weston. |
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The volume of an irregular tetrahedron |
2012-02-22 |
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From Brittany:
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?
Answered by Robert Dawson. |
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Dt[sin t tan (t^2+1)] |
2012-02-21 |
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From Ayu:
Ayu
Dt[sin t tan (t^2+1)]
derivatives
Answered by Harley Weston. |
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6/2(1+2)=? |
2012-02-21 |
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From boyong:
6/2(1+2)=?
Answered by Harley Weston. |
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