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The weight of a fish tank |
2003-05-20 |
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From A ponderer:
I had a question pertaining conversion units..I have a fish tank at home and the dimensions are 24, 44, and 48 inches, I want to find out how much it weighs in pounds when filled up with water...knowing water is 62.4 pounds per cubic feet...do I just divide the 62.4 pounds to 12 because I"m trying to find out through cubic inches.
Answered by Penny Nom. |
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The HCF and LCM of polynomials |
2003-05-20 |
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From Charanpal:
Question:
Find the HCF and LCM of the polynomials given below. Verify that he productof these HCF and LCM differs from the product of the polynomials, if at all, by a factor of -1 - 1-x2 and x3 -1
- 1 - x2 and x4 - 1
Answered by Penny Nom. |
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A trig identity |
2003-05-20 |
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From Patty:
Please help with the following
1/ tanx + cotx = sinxcosx
Answered by Penny Nom. |
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R= 5.3lnx + x. |
2003-05-11 |
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From A student:
Reaction R to a dose x is given by: R= 5.3lnx + x. For a certain drug, R must not exceed 21. Show that a dose between 8 and 12 units satisfies this requirement & find, correct to 5 decimal places, the greates value of x which satisfies this condition?
Answered by Harley Weston. |
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Subtracting rational expressions |
2003-05-10 |
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From Simone:
hi, i'm totally lost. i understand that you need to find a lowest common denominator to subtract two fractions (rational expressions) with different denominators. but what if the denominators are "x-1" and "x". is x the common denominator? if so what happens to the "-1"? do you know of any live online help i can get with the following: 3/(x-1) - (1-2x)/x i've looked through my notes and have no examples that quite match that i can follow to get through it. please help!
Answered by Penny Nom. |
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x-6square root of x +8=0 |
2003-05-10 |
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From Elizabeth:
x-6square root of x +8=0
Answered by Penny Nom. |
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Fractions |
2003-05-10 |
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From Jacques:
Voici la question qu'il pose: 2 x (1/2+1/4) + 3 + 2 x (1/3-1/4). La reponse est 4 2/3. Pourriez m'expliquer etapes par etapes ce que je dois faire.
Answered by Claude Tardif et Diane Hanson. |
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Circumference |
2003-05-09 |
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From A parent:
Find the circumference use 3 1/7 for pi
1. r= 28 ft.
2. D=98 cm
Answered by Penny Nom. |
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Real numbers |
2003-05-09 |
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From Sirena:
what is a "real" number
Answered by Penny Nom. |
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sin theta = 7/8 |
2003-05-07 |
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From Patty:
If sin0 = 7/8 and 0 is in quadrant 2, find the other five trigonometric functions of 0. (report your answers in radical form)
Answered by Penny Nom. |
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ABCD*4 = DCBA |
2003-05-07 |
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From Dee:
In the following problem, if the letters A, B, C and D represent some number, what numbers would they represent so that: ABCD*4 = DCBA
Answered by Penny Nom. |
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2/sqrt(2) |
2003-05-07 |
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From Mike:
I was looking at an example of csc 45 deg where csc = hyp / opp = 1 / (sqrt(2) / 2) = 2 / sqrt(2) = sqrt(2) I just don't get this. If sqrt(2) = 1.4142145..... How can 2 / sqrt(2) = sqrt(2) as the example shows?
Answered by Penny Nom. |
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Rules of exponents |
2003-05-05 |
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From Carl:
Hi, I am a student who would like to recall how to multiply exponents. Here is such an equation:
6.02569 X 1025 X 5.254 =?
Also, adding exponents. Don't I just add subtract the exponents separately?
Such as 523 +15-12 =??
Answered by Penny Nom. |
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Write sin(3x) in terms of sin(x) |
2003-05-05 |
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From A student:
Write sin 2x in terms of sin x
Answered by Penny Nom. |
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Four digit palindromes |
2003-05-05 |
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From Heather:
How many palindromes were in between the numbers 1000 and 9999?
Answered by Penny Nom. |
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