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Why does division start from the left? |
2000-05-24 |
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From Salil Dave:
Addition, subtraction and multiplications start with right most digit and proceed left, but division starts from left-most digits and goes right ... why?
Answered by Harley Weston. |
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A 100-gon |
2000-05-24 |
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From Chris Mohr:
What is a 100-gon called?
Answered by Harley Weston. |
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Angular velocity |
2000-05-24 |
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From Ashley Milliman:
The crankshaft of a particular automobile engine has an angular velocity of 1,500 rpm at 30 mph. The crankshaft pulley has a diameter of 10 cm, and it's attached to an air conditioner compressor pulley with a 7 cm diameter and an alternator pulley with a 5 cm diamter At what angular velocities do the compressor and alternator turn? .
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Answered by Harley Weston. |
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The equation of a parabola |
2000-05-22 |
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From Ian Forsyth:
Given the points A(0,0) B(60,10) C(24,d) find the equation of the parabola. leave the equation in terms of x, y and d if the general form of a quadratic is y = ax2 + bx + c.
Answered by Penny Nom. |
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Calculus Research Questions |
2000-05-22 |
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From William Wright:
I am a Calculus Teacher, and me and my class ran into these two problems without solutions in my manual, we got answers, but are unable to check them. If anyone gets this email and can respond to this with the solutions it be greatly appreciated.
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Answered by Harley Weston. |
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Adjacent Angles |
2000-05-21 |
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From Katherine Keys :
Can a straight angle be an adjacent angle to another angle?
Answered by Chris Fisher. |
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Volume of a sphere |
2000-05-21 |
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From Kevin Partridge:
Does anyone have a way to physically demonstrate how to explain the volume formula for a sphere? Or perhaps how to derive the formula without calculus?
Answered by Harley Weston. |
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The pythagorean theorem |
2000-05-19 |
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From Lauren Fitzgerald:
how do you find the length of th hipotnuse( or however you spell that word). i understand you have to add the two sides. but when i do add i always end up with this way off answer. i donot understand at all.
Answered by Paul Betts. |
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The square root of -1 |
2000-05-19 |
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From Gary:
i am not a student i am just some one that heard something and i can't be sure on the answer...my ? is what is the square root of -1? i think it is -1 but not sure can you let me know please thank you
Answered by Harley Weston. |
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A conic in standard form |
2000-05-18 |
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From Tara McConkey:
Im havign trouble converting the following conic to standard form, i know that the conic is a hyperbola but that is all 16x2-9y2-160x-18y+247=0
Answered by Harley Weston. |
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Radioactive decay |
2000-05-18 |
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From Catherine Sullivan:
Please help me with the following: The radioactive isotope carbon-14 is present in small quantities in all life forms, and it is constantly replenished until the organism dies, after which it decays to carbon-12 at a rate proportional to the amount of C-14 present, with a half life of 5730 years. Suppose C(t) is the amount of C-14 at time t. - Find the value of the constant k in the differential equation: C'=-kC
- In 1988 3 teams of scientists found that the Shroud of Turin, which was reputed to be the burial cloth of Jesus, contained 91% of the amount of C-14 contained in freshly made cloth of the same material. How old is the Shroud according to the data?
Answered by Harley Weston. |
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Graphing a linear function |
2000-05-17 |
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From Chelsea:
I need help with grahing linear functions.If you could e-mail me back the basics and how tos I would be much appriciative.
Answered by Penny Nom. |
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The number of seats in an auditorium |
2000-05-16 |
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From David Evaska:
There are 10 students in the first row of seats in an auditorium 12 in the second 14 in the third and 2 additional in each seat. The total number of rows is 40. I know the answer is 1960 can you please show me the formula step by step.
Answered by Penny Nom. |
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Six letter words |
2000-05-15 |
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From Karl Freitag:
An anthroplogist discovers an isolated tribe whose written alphabet contains only six letters (call the letters A,B,C,D,E, and F). The tribe has a taboo against using the same letter twice in the same word. It is never done. If each different sequence of letters constitutes a different word in the language, what is the maximum number of six-letter words that the language can employ?
Answered by Penny Nom. |
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A trigonmetric identity |
2000-05-15 |
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From Caitlin:
My name is Caitlin and my question is from 11th grade math and I'm a student my question is I need to solve this identity : cos x csc x - sin x sec x = 2 cot 2x
Answered by Paul Betts. |
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