Science & Mathematics - 30 October 2006

A boat weighs 1500 lb more than its motor and 1900 lb more than its trailer. Together the boat and motor weigh five times as much as the trailer How much does the boat weigh? Use only ONE variable

2006-10-30 14:26:52 · 3 answers · asked by Anonymous in Mathematics

i have no idea wat to do with that...

2006-10-30 14:24:34 · 3 answers · asked by Anonymous in Mathematics

maybe a insect or parisite and how to kill it.

2006-10-30 14:22:10 · 2 answers · asked by susan h 1 in Zoology

since quadrants arent precision instruments, how might error be introduced when sighting stars?

2006-10-30 14:19:19 · 3 answers · asked by blablabla 1 in Astronomy & Space

Data on salaries in the public school system are published annually. The mean annual salary for classroom teachers is $43, 658. Assume a standard deviation of $8000.
A) Determine the sampling distribution of the sample mean for samples of size 64. Interpret your answer in terms of the distribution of all possible sample mean salaries for samples of 64 teachers.
B) Repeat part A) for samples of size 256.
C) Do you need to assume that public school teacher salaries are normally distributed to answer parts A) and B)? Explain your answer.

2006-10-30 14:19:16 · 1 answers · asked by Anonymous in Mathematics

a)SiCl4
b)SO3
c)F2
d)BBrF2

2006-10-30 14:18:32 · 1 answers · asked by Anonymous in Chemistry

A person jumps from the roof of a house 4.6 m high. When he strikes the ground below, he bends his knees so that his torso decelerates over an approximate distance of 0.70 m. The mass of his torso (excluding legs) is 46 kg. Find the average force exerted on his torso by his legs during deceleration.

2006-10-30 14:17:50 · 3 answers · asked by Emily J 1 in Physics

2006-10-30 14:17:41 · 5 answers · asked by Anonymous in Mathematics

f(x) = 1/2x + 3; f(4)---

f(x) = x/3 + 4; f(-9)---

f(x) = x + 4; f(2)---

f(x) = -3x + 2; f(-4)---

2006-10-30 14:17:09 · 4 answers · asked by precious_angel_amy34 2 in Mathematics

2006-10-30 14:14:45 · 1 answers · asked by bslatta2006 1 in Medicine

Sorry everyone, but I don't understnad this question, yet again. Oh, and thanks to I ♥ AUG, btw. Now, here's the question: The cost for 7 dance lessons is $82. The cost for 11 lessons is $122. Write a linear equation to find the total cost (C) for (L) lessons. Then use the equation to find the cost of 4 lessons. I'd appreciate if you told me HOW to work the question, and the actual answer is optional. Thanks!

2006-10-30 14:13:45 · 7 answers · asked by Freddie Dearest 2 in Mathematics

An airplane flies at a rate of 356 km/h . If the plane travels a total distance of 1424 km, how long was it in the air?

3.56 hr
4 hr
4.24 hr
5 hr
14.2 hr

2006-10-30 14:12:37 · 7 answers · asked by soccergrl8128 1 in Mathematics

2006-10-30 14:11:39 · 5 answers · asked by AJ 1 in Medicine

2006-10-30 14:10:59 · 3 answers · asked by Sunnygirl 1 in Astronomy & Space

A 2000 L tank containing 550 L of water is being filled with water at the rate of 75 L per minute from a full 1600 tank. How long will it be before the two tanks have the same amount of water? Use on one variable

2006-10-30 14:10:59 · 2 answers · asked by Anonymous in Mathematics

2006-10-30 14:10:28 · 2 answers · asked by Sunnygirl 1 in Astronomy & Space

2006-10-30 14:10:05 · 4 answers · asked by pete 1 in Chemistry

The coefficient of static friction is 0.65 between the two blocks. The coefficient of kinetic friction between the lower block and the floor is 0.20. Force causes both blocks to cross a distance of 6.5 m, starting from rest. What is the least amount of time in which this motion can be completed without the top block sliding on the lower block?

2006-10-30 14:09:45 · 1 answers · asked by Anonymous in Physics

*note--- an= a sub n

I have figured part of this out, but I don't know what to do when I'm supposed to prove it with n+1 replacing n.

2006-10-30 14:08:34 · 3 answers · asked by soccerman1990 2 in Mathematics

2006-10-30 14:07:55 · 2 answers · asked by juan c 1 in Mathematics

2006-10-30 14:07:49 · 9 answers · asked by Cindy L 1 in Astronomy & Space

Explain why terminal alkenes and alkynes (ie. 1-pentene and 1-pentyne) are easier to synthesize in high yield via elimination reactions than internal alkenes and alkynes (ie. 2-pentene and 2-pentyne)

2006-10-30 14:07:34 · 1 answers · asked by afchica101 1 in Chemistry

How is the calculation done to detect the position of the globle.

2006-10-30 14:06:22 · 3 answers · asked by Asanga J 1 in Astronomy & Space

How is the calculation done to detect the position of the globle.

2006-10-30 14:05:41 · 2 answers · asked by Asanga J 1 in Physics

1. ADD

(3)/(2x) + (1)/(y)



if a trapezoid had a height of 8. what is its area.

the long side is 30 and the second long side is 22

2006-10-30 14:00:29 · 2 answers · asked by dojorno5 2 in Mathematics

If the nucleus of an atom has only positively charged protons and neutral neutrons, and like charges repel.... what holds the atom together?

Sue

2006-10-30 13:57:20 · 5 answers · asked by newbiegranny 5 in Chemistry

2006-10-30 13:57:18 · 5 answers · asked by Anonymous in Mathematics

2006-10-30 13:56:40 · 2 answers · asked by htt_erick 1 in Chemistry

2006-10-30 13:55:56 · 5 answers · asked by raymond h 1 in Medicine

2006-10-30 13:54:49 · 10 answers · asked by Anonymous in Mathematics