Science & Mathematics - 12 December 2006

There are 850 Douglas fir and ponderosa pines trees in a section of forest bought by Sawz Logging Co. The company paid an average of $300 for each Douglas fir and $225 for each ponderosa tree. If the company paid $217,500 for the trees, how many of each kind did the company buy?

A common mistake when solving equation is the following:
The equation: 2(x-2)=x+3
First step in solving: 2x-2=x+3
Write a clear explanation of what error has been made. What could be done to avoid this error?

2006-12-12 12:12:15 · 6 answers · asked by mysteryperson 1 in Mathematics

Plese explain the process so I can understand.
As part of a promotional scheme, the manufacturer of a new breakfast food offers a prize of $500,000 to some person willing to ry a new product distributed without charge and send in his or her name on the packaging label. The winner will be drawn at random. What is the mathematical expectation if 2,500,000 persons send in their names? Do you think it was worth the $0.39 postage? Thanks 4 ur help.

2006-12-12 12:08:04 · 1 answers · asked by zeppie123 1 in Mathematics

2006-12-12 12:07:04 · 14 answers · asked by Anonymous in Botany

How do cleavage faces differ from crystal faces?

2006-12-12 12:05:39 · 2 answers · asked by Jaime 2 in Earth Sciences & Geology

ok how am i supposed to figure out a questions like this (*=the exponets of 2 and % means 3 because I cannot create exponets above numbers) (-x)*(-x*)*(-x%) Please expain the problem thanks

2006-12-12 12:04:12 · 3 answers · asked by SnowboardGirl 1 in Mathematics

2006-12-12 12:04:03 · 3 answers · asked by mikkinumberone@sbcglobal.net 1 in Physics

2006-12-12 12:02:54 · 4 answers · asked by Emily C 1 in Engineering

I would like the procedure, not only the result.

2006-12-12 12:02:24 · 3 answers · asked by Strabos 2 in Mathematics

2006-12-12 12:00:53 · 15 answers · asked by Anonymous in Mathematics

has anyone proven that the electron is slowing in its speed of orbit around the nucleus ? if not ! does this not prove the concept of perpectual motion and defy the truth of thermal dynamics ! what about string theory! and the concept of space as a vacume !creating energy ! is space slowing down or accelerating? please inform me thanks

2006-12-12 11:58:34 · 4 answers · asked by daniel e 1 in Physics

why are some people against stem cell research. because i think i'm confused about that

2006-12-12 11:57:49 · 9 answers · asked by thatgirl 1 in Biology

2006-12-12 11:57:47 · 2 answers · asked by angel ballerina 2 in Biology

2006-12-12 11:57:12 · 8 answers · asked by Anonymous in Mathematics

2006-12-12 11:56:26 · 3 answers · asked by Anonymous in Engineering

i am not that good at math and need big help on something. i don't have my book with me.... i have my semester finale tomorrow. and i have a packet to help me study.. i have to get a good grade on this finale or else i would be grounded. I have an f in that class too.. ok heres what i need.
how to find out if a traingle is a right triangle by using the givin lengths
Here' 1 problem:
lengths: 11 60 61. i am not really sure how to find it. i have an idea but not sure

then the same thing but findong out what kind of triangle it is
find if two lines are parellel: 2x+7y= -28 y=2/7x-7

finding angles to see if lines are parallel.: 2 of the angles(5x+48) (11x-12)
finding distances of a figure
I can't draw it here. but i can discribe it: BD-80 DC-42 AC-30 how long is AB
FInd distance from pointA to BC
BD-80 DC-48 AC60

2006-12-12 11:55:40 · 2 answers · asked by Gothic Girl 4 in Mathematics

My science teacher (not a bio teacher, but a chemistry teacher) told us that blood was an organ. I know that skin is an organ, and he was saying that if skin is an organ, then blood is, or something like that. I looked online, and I cannot find anything that says that blood is an organ. Does anyone know for sure?

2006-12-12 11:55:15 · 11 answers · asked by Anonymous in Biology

2006-12-12 11:53:08 · 8 answers · asked by charity l 1 in Astronomy & Space

I need help setting up this problem:

2 C4H10(g) + 13 O2(g) -> 8 CO2(g) + 10H2O(g)

How many liters of H2O(g) is formed when 0.529 L of C4H10(g) is burned?

2006-12-12 11:52:21 · 4 answers · asked by Mia16 3 in Chemistry

What is the conjugete base in...
HClO4
H2S
PH4+
HCO3-

What is the conjugete acid in...
Cu-
SO4^2-
H2O
HCO3-

2006-12-12 11:52:03 · 2 answers · asked by Anonymous in Chemistry

i reckon these are the Redox equations...but still be done the same way Probally:
These are done the Redox Way....
1) Bi2 S3 + HNO3 >>>> Bi (NO3)3 + NO + S + H2O
2) K2 Cr2 O7 + HCl >>>> KCl + CrCl3 + Cl2 + H20
3) HgS + HCl + HNO3 >>>> Hg Cl2 + NO + S + H2O

2006-12-12 11:50:46 · 1 answers · asked by truckin_90 2 in Chemistry

solve the equation for x. 2(x-6)-3(x+5)=3(x-2)-7
solve the equation for x. 3x-5(3x-7)=2(x+9)=45

2006-12-12 11:46:42 · 8 answers · asked by mysteryperson 1 in Mathematics

In submarine location problems, it is often necessary to find the submarine's closest point of approach to a sonobuoy in the water. Suppose that the submarine travels on a parabolic path y=x^2 and that the buoy is located at the point (2, -1/2).

Show that the value of x that minimizes the square of the distance, and hence the distance, between the points (x, x^2) and (2, -1/2) is a solution of the equation x=1/(x2+1)

2006-12-12 11:46:19 · 2 answers · asked by Anna 2 in Mathematics

titration of a 10.0 mL solution of KOH requires 15.0 mL of 0.0250 M H2SO4 solution. what is the molarity of the KOH solution?

2006-12-12 11:45:47 · 1 answers · asked by femylatina 1 in Chemistry

2006-12-12 11:43:48 · 1 answers · asked by Jaime 2 in Earth Sciences & Geology

2006-12-12 11:42:27 · 7 answers · asked by Angelika 2 in Mathematics

How close does the curve y=square root of x come to the point (3/2, 0)?

Can someone please show me how to do this problem step by step? thanks soo much!

2006-12-12 11:41:29 · 2 answers · asked by Anna 2 in Mathematics

2006-12-12 11:40:26 · 2 answers · asked by Angelika 2 in Mathematics

8x+5y=24
5x-5y= -57

2006-12-12 11:38:36 · 3 answers · asked by Anonymous in Mathematics

27,9,3,1,___,___

1/3,1,3,9,___,___,243

------------------------------------------------------
expression: n(n+2)
if n=1
if n=2
if n=3
if n=4
if n=5
--------------------
please help me more as much as u can thax you

2006-12-12 11:38:34 · 3 answers · asked by Question box 1 in Mathematics

2006-12-12 11:38:07 · 7 answers · asked by jenn 1 in Earth Sciences & Geology