Science & Mathematics - 17 December 2006

At the age of 21, Cyndi began receiving yearly payments from a trust fund. On each succeeding birthday, she received twice as much as in the preceding year. If she had received a total of $303,800 by age 25, how much did she receive at age 21?

2006-12-17 03:53:07 · 3 answers · asked by MeOw... 1 in Mathematics

I have thought of an idea that I think would prove beneficial to people.....and save energy!!.....I am not a professional scientist and while I think my idea is feasible, I am a little unsure of the physics involved...who can I contact who I can trust and who can lead me through the next steps?

2006-12-17 03:52:43 · 7 answers · asked by stephen p 1 in Engineering

in relation to the Nervous System

2006-12-17 03:48:56 · 2 answers · asked by Sars 1 in Biology

Question is in relation to radioactivity.

2006-12-17 03:48:51 · 6 answers · asked by Anurag 2 in Physics

let f(x) = x^3+ax^2+ bx+c where a,b,and c are constants with a › or equal to zero, and bis greater then zero.

A) over what intervals is f concave up?

B) show that f must have exactly one inflection point.

C? given that 0,-2 is the inflection point of f, compute a and c and then show that f has no critical point.

2006-12-17 03:48:42 · 2 answers · asked by jaywalkingjorn 2 in Mathematics

give me some websites for practising factorisation?

2006-12-17 03:48:22 · 7 answers · asked by ram kumar 2 in Mathematics

2006-12-17 03:45:33 · 9 answers · asked by John E 1 in Mathematics

2006-12-17 03:43:41 · 12 answers · asked by monica m 1 in Astronomy & Space

what will you do?

2006-12-17 03:43:30 · 5 answers · asked by Anonymous in Weather

You have a Flask. The bottom part of the flask is in the shape of a truncated cone with bottom radius of 10 cm, top radius 5 cm, height 10 cm. Sitting on top of the truncated cone is a tall cylindar whose radius is 5cm. Liquid is being poured into the flask at a rate of 2cm^3/s. Note that the volume of a cone whose bottom radius is r and whose vertical hieght is h is given by v=(1/3)π(r^2)h.

I also know- bottom iare is V=(1/3)π(r^2)h-(1/3)π((10-.5h)^2)•(20h).

I have had a lot of problems with this, and if somebody could walk me through this, it would be much appriciated.

A) When the liquid is 15cmhigh in the flask, how fast is the height of the liquid increasing? (I don't think I need to worry about the cone for this one, becasue the water is already out of the cone)

B)If the flask is initially empty, how long does it take the liquid to reach a height of 10 cm?

C How fast is the height of the liquid rising when the liquid is 5cm deep.

2006-12-17 03:42:06 · 2 answers · asked by jaywalkingjorn 2 in Mathematics

2006-12-17 03:35:09 · 10 answers · asked by Jerry 2 in Astronomy & Space

2006-12-17 03:33:52 · 8 answers · asked by satish0811 1 in Physics

For instance, would an antiproton annihilate a neutron, or only a proton?

2006-12-17 03:33:32 · 3 answers · asked by rainfingers 4 in Physics

give the proof for mid-point theorem?

2006-12-17 03:31:01 · 6 answers · asked by ram kumar 2 in Mathematics

1) F(x)=12-4x
2) F(x)=1/x
3) F(x)=(x-1)/(2-x)

2006-12-17 03:29:02 · 5 answers · asked by Random G 3 in Mathematics

A 2.00*10^3kg car has a speed of 12.0m/s. The car then hits a tree. The tree doesn't move and the car comes to rest.
a) What is the amount of work done in pushing the front of the car?
b) Find the sizeof the force that pushed the front of the car in50.0cm

2006-12-17 03:26:38 · 2 answers · asked by Physics 101 1 in Physics

2006-12-17 03:26:23 · 4 answers · asked by dev d 1 in Biology

2006-12-17 03:25:39 · 6 answers · asked by Anonymous in Biology

I'm from a warm state, and I'm going to Michigan for Christmas. Is 46 degrees like cold. Does it usually feel cold where you would have to wear a winter jacket? How should I dress?

2006-12-17 03:25:30 · 18 answers · asked by Captain705 1 in Weather

y over y - 4 = 5 + 2 over y - 4

2006-12-17 03:23:46 · 5 answers · asked by JUAN CARLOS R 1 in Mathematics

2006-12-17 03:22:02 · 5 answers · asked by Anonymous in Astronomy & Space

I always see chicken and beef in restaurants and grocery stores. Is there a possibility that we are eating rooster and bulls ? If not what is done with them.

2006-12-17 03:21:05 · 7 answers · asked by sakusteam 1 in Zoology

2006-12-17 03:20:52 · 5 answers · asked by cluj120 2 in Zoology

finding its formula

2006-12-17 03:19:56 · 3 answers · asked by Anonymous in Physics

make specific answers!

2006-12-17 03:19:03 · 11 answers · asked by Misha A 1 in Botany

doing analysis for my project work. for this i would like to know is it possible to use composites for front axle

2006-12-17 03:15:29 · 2 answers · asked by varatharaju_p 1 in Engineering

one or two facts is good

2006-12-17 03:15:27 · 4 answers · asked by christina p 4 in Other - Science

2006-12-17 03:12:58 · 5 answers · asked by Anonymous in Mathematics

2006-12-17 03:12:53 · 3 answers · asked by Anonymous in Zoology

in 2nd grade my teacher said it is an astroid or something? i can't remember what she said. do u know

2006-12-17 03:12:22 · 17 answers · asked by Anonymous in Astronomy & Space