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Proof that the root of 27 is irrational |
2009-10-18 |
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From Scarlet:
How do you prove that the square root of 27 is irrational?
Answered by Victoria West. |
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The equation of a circle |
2009-10-17 |
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From Renson:
A circle passes through (4,2) and (11,-5) with center on the line 3y-5x+41=0.Determine its equation in standard form.
Answered by Penny Nom. |
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The next three terms |
2009-10-16 |
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From Shawn:
I'm a parent and don't know how to help my 6th grader solve for this problem.
Name the next tree terms in this sequence and tell the rule used to find each:
-1,0,1,0,1,2,3,8,25,.....
Answered by Chris Fisher. |
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541.39(1 + i)^15 = 784.09 |
2009-10-14 |
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From Fitore:
Hi, I noticed that this question was already posted up, however I was hoping I could solve it without having to use logs. Can you please help me? The equation is:
541.39(1 + i)^15 = 784.09
Answered by Penny Nom. |
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Concentric circles |
2009-10-14 |
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From maddy:
Find the exact area of the region bounded by two concentric circles with radii 10 inches and 6 inches.
Answered by Penny Nom. |
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The three angles of a triangle |
2009-10-13 |
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From Michelle:
The second angle of a triangular garden is four times as large as the first.
The third angle is 45 less than the sum of the other two angles.
Find the measure of the other two angles?
Answered by Penny Nom. |
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What fraction of my goal has been raised? |
2009-10-13 |
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From sally:
If my goal is to raisel $300 and I have only raised $240 what
fraction of my goal has been raised
Answered by Penny Nom. |
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The radius of an arc |
2009-10-13 |
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From AYMAN:
Question from ayman:
i would like to know the radius of an arc , i do not know the angle , can u please explian it with an example ,
all i know , or i think i know is a draw line , the reason i asked yu guys this Q , is i am a boilermaker apprentice , sometimes i do deal with a bended pipes or flate plates of metal .
when i try to do the same bend as these pipes , it is quite hard so for me to find out the radius of the pipe already bended & find out the angle i will be able to know the full length of the material thats all , thank you
Answered by Robert Dawson. |
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How many gallons does it contain when it is 1/6 full? |
2009-10-13 |
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From Bren-Nesha:
A tank contains 200 gallons when it is 4/5 full. How many gallons does it contain when it is 1/6 full? I already know the answer but i would like to know how to arrive at the answer.
Answered by Penny Nom. |
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The integral of sqrt(x) * ln(x) |
2009-10-12 |
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From Oana:
Hi! Can you tell me please how much is : ∫ (√x * ln x) ?
Answered by Penny Nom. |
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The cube of a number plus five times the number plus 1 |
2009-10-12 |
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From JP:
Find a counterexample to the statement: The cube of a number added to the sum of five times the number and 1 is a prime number.The cube of a number added to the sum of five times the number and 1 is a prime number
Answered by Penny Nom. |
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Integration of cos (x^2) dx |
2009-10-12 |
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From Venkat:
How do you evaluate the integration of cos (x^2) dx ?
Answered by Harley Weston. |
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A max/min problem |
2009-10-12 |
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From avien:
a rectangle has a line of fixed length Lreaching from the vertex to the midpoint of one of the far sides. what is the maximum possible area of such a rectangle? SHOW SOLUTION USING CALCULUS
Answered by Penny Nom. |
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A right triangle |
2009-10-12 |
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From Josseph:
A right triangle has an area of 84ft sq. and a hypotenuse 25ft long. What are the lengths of the other two sides?
Answered by Penny Nom. |
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The area of a rectangle |
2009-10-10 |
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From Ann:
given a rectangle with sides a and 2a and diagonal d, find the area of the rectangle as a function of the diagonal,d
Answered by Penny Nom. |
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