Science & Mathematics - 24 July 2007

I was working on one of my Algebra 1 worksheets when I encountered a problem that I could not figure out. The problem is below:

Miss Apple can grade her class papers in 3 hours while it takes her assistant 4 1/2 hours. If Miss Apple graded the papers for 1 hour and then left the rest of the job to her assistant to complete, how long will it take her assistant to finish grading the papers?

Thanks so much! Please try to list all the steps so it is easier for me to understand.

2007-07-24 12:28:05 · 9 answers · asked by Marriot_Plum23 1 in Mathematics

A population has 3 genotypes distributed as follows:
FF200, Ff0, ff800. What would be the Hardy-Weinberg equilibrium genotype frequencies in this population? Show values for p and q?
someone show me how to do this but each was different, which one is really right?
F2+Ff+f2
400/2000 =.2 F
1600/2000=.8F
.2^2= .04FF
2 x .2 x .8= .32 Ff
.8^2= .64 ff
------------------------------... or this one?
p2+ 2pq+q2=1
p+q=1
200+800 = 1000
200/1000= .20 (p2)
800/1000= .80 (q2)
2pq= 0
p= .44 (root of .2)
q=.89 ( root of .8)

2007-07-24 12:25:17 · 4 answers · asked by Kelly 1 in Biology

Does anyone know what the easiest way to get an Asian Vine snake to eat a pinky mouse instead of a house ghecko or small anole? It's much cheaper to buy pinkies instaed of anoles!

2007-07-24 12:24:34 · 1 answers · asked by beagleboy8 2 in Zoology

dont know

2007-07-24 12:23:50 · 6 answers · asked by Lisa H 1 in Mathematics

find AD and BD
here:
http://www.crunchyroll.com/user/babiixjen_x3/photos/1311053

I really really dont know this! HELP!
thank you

2007-07-24 12:21:30 · 3 answers · asked by blahhhhhh 2 in Mathematics

How many astronomical units from the Sun is Saturn?

2007-07-24 11:36:57 · 6 answers · asked by Anonymous in Astronomy & Space

I've lived here all my life and never really knew how long, in decades, a terrestrial year lasts. Any experts on the subject?

2007-07-24 11:23:50 · 8 answers · asked by Bren C 1 in Astronomy & Space

How does a water_treament pland slows down eutrophication?

2007-07-24 11:21:00 · 2 answers · asked by Anonymous in Geography

2007-07-24 11:20:53 · 5 answers · asked by 1love 1 in Mathematics

i tried searching it. but i couldn't find what i was looking for. :|

2007-07-24 11:15:01 · 6 answers · asked by help me :)) 2 in Mathematics

Imagine that the table were moved to a distance of 10 feet. How many light bulbs in total would have to be placed on the table to light up the newspaper to the same amount of brightness as before?
a) 1
b) 2
c) 3
d) 4
e) more than 4

2007-07-24 11:13:05 · 7 answers · asked by Anonymous in Astronomy & Space

by factoring

2007-07-24 11:09:50 · 7 answers · asked by 1love 1 in Mathematics

I am not looking for metric I need US standard
Thanks

2007-07-24 11:09:35 · 3 answers · asked by lemley 3 in Mathematics

Factor the polynomial completely. If the polynomial cannot be factored, write prime.
25x^2 - 36

(5x - 6)^2
(5x + 6)^2
(5x + 6)(5x - 6)
prime

2007-07-24 11:09:34 · 5 answers · asked by Anonymous in Mathematics

(6,1) (5,4)
i had to put this in Ax+By =C and reduce to the lowest term

my answer is y=3x+19 but its wrong.i only have
7 spaces for my whole complete answer.

same with this
(7,-3)(4,-8)

2007-07-24 11:09:03 · 6 answers · asked by percy m 1 in Mathematics

Cu(IO3)2

CaTe

Cs2SiF6

2007-07-24 11:06:22 · 3 answers · asked by the1wasted_guy 1 in Chemistry

How'd he come up with that?

2007-07-24 11:03:04 · 1 answers · asked by Anonymous in Engineering

Factor the polynomial completely. If the polynomial cannot be factored, write prime.
x^4 + 24x^2 - 25

(x^2 - 1)(x^2 + 25)
(x + 1)(x - 1)(x + 5)(x - 5)
(x + 1)(x - 1)(x^2 + 25)
(x - 1)^2(x^2 + 25)

2007-07-24 10:58:51 · 4 answers · asked by Anonymous in Mathematics

If you had enough string, could you drop it from a satellite in geosynchronous orbit 22,000 miles straight down to earth. What properties would the string have? Could objects be slid up and down on it? What experiments could be done with the string?

2007-07-24 10:56:53 · 4 answers · asked by Menehune 7 in Astronomy & Space

Factor the polynomial completely. If the polynomial cannot be factored, write prime.
24k^3m - 81m^4

(6km - 9m^2)(4k^2 + 9m^2)
3m(2k - 3m)(4k^2 + 6km + 9m^2)
3m(8k - 3m)(k^2 + 6km + 9m^2)
3m(2k + 3m^2)(4k^2 - 6km + 9km^2)

2007-07-24 10:56:07 · 4 answers · asked by Anonymous in Mathematics

It's a math problem that relates to solving the average number. For instance: A History classroom has 22 students who normally attend class. This week there where some students were marked tardy. 4 students were tardy on Monday, 2 were marked tardy on Tuesday, 7 students were marked tardy on Wednesday, and 6 students were marked tardy on Thursday and Friday. What is the average number of students who were marked tardy this week?

4,2,7,6,6

Mean = Total of items divided by the number of items
Median = Middle Value
Mode = Most Common
Range = How far from the smallest to the biggest

2007-07-24 10:54:45 · 4 answers · asked by Anonymous in Mathematics

An outfielder picks up a ground ball and wants to make a quick 150ft throw to first base. To save time, he does not throw the ball directly to the first baseman. He skips the ball off the artificial surface at 75ft so that the ball reaches first base after a bounce. The equations

x = v_o (t)(cosΘ)
and
y = -16t^2 + v_o (t)(sinΘ) + h_o

give the coordinates of the ball at time t seconds for an initial angle of Θ degrees, initial velocity v_o ft/sec, and initial height of 5 ft and the ball is caught at a height of 5 ft.

(1)At what angle from horizontal must the ball be thrown to reach first base without a skip?
(2)At what angle from horizontal must the ball be thrown so that is strikes the ground at 75ft?

2007-07-24 10:48:06 · 2 answers · asked by Bosworth 1 in Mathematics

Does anybody know if anyone has speculated or even theorized on the possibility that other solar systems have their own Oort clouds.
If so, could the cometary clouds of different solar systems intermingle and/or disturb eachother.
Like say, if two solar system's Oort clouds clashed could they cause the destruction of one of the Solar Systems.

2007-07-24 10:44:11 · 7 answers · asked by barry_smith_12357 2 in Astronomy & Space

it's random i know but...

2007-07-24 10:39:55 · 11 answers · asked by Amanda 1 in Chemistry

a) very close to the earth
b) about half way to the moon
c) very close to the moon
d) about twice as far as the Moon

2007-07-24 10:39:41 · 8 answers · asked by regina l 1 in Astronomy & Space

a) there is no gravity in space
b) they are falling in the same way as the space shuttle
c) they are above the earth's atmosphere
d)there is less gravity inside the space shuttle
e) more than one of the above

2007-07-24 10:33:40 · 9 answers · asked by regina l 1 in Astronomy & Space

I heard somewhere you can get it by the drips from the faucet or something like that, but I need to confirm it. How else can you get it besides buying it. Please help!

2007-07-24 10:33:22 · 4 answers · asked by Anonymous in Chemistry

2007-07-24 10:33:22 · 12 answers · asked by Anonymous in Physics

You are going to use a 12-inch basketball to represent earth and a 3-inch tennis ball to represent the moon. To maintain proper distance scale, about how far from the surface of the basketball should the tennis ball be placed.
a) 4 inches (1/3 foot)
b) 6 inches (1/2 foot)
c) 36 inches (3 feet)
d) 30 feet
e) 300 feet

2007-07-24 10:31:25 · 4 answers · asked by regina l 1 in Astronomy & Space

with all this bad weather, all the canals are normal, how can this be?

2007-07-24 10:27:10 · 8 answers · asked by K D 1 in Weather