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The three sides of a triangle |
2008-04-16 |
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From Bridgett:
The sum of the lengths of any 2 sides of a triangle must be greater than the third side. If the triangle has one side that is 11 CM, and the second side of the triangle is 4 cm less than twice the third side, what lengths do the 2nd and 3rd side have to be?
between 0000-00-00 and 9999-99-99
Answered by Stephen La Rocque. |
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The area of an asphalt parking lot |
2008-04-16 |
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From Lidia:
An asphalt parking lot measures 100m x 500m. Calculate the area in square meters.
Answered by Penny Nom. |
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Chord, radius, arc length and central angle |
2008-04-15 |
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From Cindy:
There is a railroad curve with a chord length of 2000 ft. and a central angle of 35 degrees. What is the radius and arc length of the circular arc?
Answered by Stephen La Rocque. |
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A quadratic equation with odd coefficients |
2008-04-15 |
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From Manashi:
If p,q,r be any odd integers, then prove that the roots of the quadratic equation px^2+qx+r=0 can't be rational .
Answered by Stephen La Rocque. |
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What is 300% as a fraction? |
2008-04-14 |
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From Carli:
what is 300% as a fraction
Answered by Stephen La Rocque. |
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Conic sections |
2008-04-14 |
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From Christine:
In my analysis class we are learning about conic sections.
Our project is to create a genral statement of the definition of conic sections.
Truthfully, I have absolutely no clue on how I should write that.
Could you help me?
Answered by Walter Whiteley. |
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Escalator challenge |
2008-04-13 |
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From Corey:
Walking up a broken escalator (escalator not working) takes 75 seconds. Riding up the same escalator (not walking) when it is working takes 45 seconds. How long would it take a person to walk up the escalator when it is working ?
Answered by Stephen La Rocque. |
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The area bounded by 3 curves |
2008-04-13 |
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From Sabahat:
Hi, I have enclosed a diagram.
The diagram shows the curve y=(2x-5)4. The point P has co-ordinates (4,81) and the tangent to the curve at P meets the x-axis at Q.
Find the area of the region (shaded in the diagram) enclosed between the curve, PQ and the x-axis . (Please note that the equation y is read as y=2x -5 whole raise to power 4.)
Answered by Stephen La Rocque. |
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A tangent to two circles |
2008-04-13 |
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From erson:
find the length of the tangent segment AB to two circles whose radii are a and b respectively, when the circles touch each other.
the illustration looks like this...hope you'll understand...
there are 2 circles - one is big one is small. they touch each other. and there is this irregular 4 sided polygon that connects them...there is a line that connects them from their center point and another from the tip of the circles...and that's it...i cannot explain very well
please bear with me
Answered by Stephen La Rocque. |
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A tangent to a circle |
2008-04-13 |
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From rogerson:
Line t from point P is tangent to circle O at T, the point of tangency. Find the length of PT when the radius of the circle is 5cm and the distance between points P and O is 8cm.
Answered by Stephen La Rocque. |
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A coin is tossed 30 times |
2008-04-13 |
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From seulki:
coin tossed 30 times, what is the probability that the heads show up fewer than 17 times?
Answered by Harley Weston. |
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f(x) =ax^blnx |
2008-04-13 |
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From charles:
supposef(x) =ax^blnx is a real- valued function. Determine exact values(not decimal approximations) fro nonzero constants a and b so that the function f has a critical point at x=e^3 and a maximum value of 1/2e
Answered by Harley Weston. |
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A parallel line to a given line |
2008-04-12 |
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From john:
A parallel line to a given line through a given point not on the a given line
Answered by Harley Weston. |
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A 13 cubic foot cylinder filled with sand |
2008-04-12 |
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From Thomas:
I have a 100 pound bag of sand. I need to know how much sand I will need to fill a 13 cubic foot cylinder
Answered by Harley Weston. |
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The maximum area of a pizza slice |
2008-04-12 |
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From charles:
A slice of pizza in the form of a sector of a circle has a perimeter of 24 inches. what value for the radius of the pizza makes the slice largest[when o is the central angle in radians, the area of the sector is given by A= r^20/2and the length on the circle is given by s=r0
Answered by Harley Weston. |
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