Science & Mathematics - 5 September 2007

Could someone pls help me with this? Thx.

The revenue generated by a new product can be modeled as R(x)= -5x^2 + 21x. The cost function is C(x)= 4x+14. How many items are required to maximize the profit? What is the maximum profit?

2007-09-05 12:47:50 · 4 answers · asked by tmlfan 4 in Mathematics

212 divided by 7 , 376 divided by 9 , 280 divided by 3 , 541 divided by 8 ,1,058 divided by 5 , 3,018 divided by 6 , 5,072 divided , 1718 divided by 4 , 3,767 divided by 6 , 3,372 divided by 67 , 1,373 divided by 19, 2,129 divided , 4,165 divided by 59 , 4,038 divided by 41 , 2,612 divided by 31, 1,609 divided by 34 , 1,937 divided By 48 ,1,350 divided by 54 , 1850 divided By 82 = thats all of It about 20 Of them please show Work =[

2007-09-05 12:47:40 · 11 answers · asked by tdang424 7 in Mathematics

Determine the quantity (mg/L) of sodium hypochlorite (NaOCl) that would be required to oxidize 0.5 mg/L of ferrous ion (Fe2+) according to the following reaction:

2 Fe2+ + NaOCl + 2 H+ 2 Fe3+ + Na+ + H2O + Cl-

2007-09-05 12:45:24 · 1 answers · asked by crazyboy496 1 in Chemistry

2007-09-05 12:45:17 · 17 answers · asked by yousifdhym 1 in Weather

2007-09-05 12:44:50 · 1 answers · asked by north h 3 in Mathematics

Please help! I need to no why too!

2007-09-05 12:44:29 · 7 answers · asked by KitKatbar 2 in Astronomy & Space

A (-1,-1)
B (8,2)
I know it's some simple formula, I think the distance formula or something.. but I forgot it.

2007-09-05 12:37:40 · 1 answers · asked by pepsi 2 in Mathematics

2007-09-05 12:36:11 · 3 answers · asked by Ilkie 7 in Zoology

The relation given by the circle
x^2+y^2+6x-10y=15
does define two functions whose graphs are the upper and lower halves of the circle. Find expressions for these two functions.

2007-09-05 12:35:05 · 4 answers · asked by Anonymous in Mathematics

given are length of a /\ 4, 8, 4[square root] 3

2007-09-05 12:34:57 · 1 answers · asked by blahhhhhh 2 in Mathematics

I need some help. Can someone take a stab at who my soulmate is. Im having trouble deciding if I should even continue wasting my time looking.

2007-09-05 12:34:53 · 9 answers · asked by Anonymous in Paranormal Phenomena

When it is backwards it is 21 12 21.
Dont say it is the same thing that happened on 2000.
This is the last prediction and is not just made up like the 2000 one.

2007-09-05 12:34:26 · 14 answers · asked by Tony T. 4 in Astronomy & Space

please help me, i need it so badly im dying.

2007-09-05 12:34:02 · 6 answers · asked by t92vt 1 in Mathematics

2007-09-05 12:33:28 · 8 answers · asked by iluvunda559 1 in Physics

For instance,

The average temperature this week was 14 deg.

The the temps were -1, 10, -4, 16, 29, 33.

How would I find the missing day? I tried adding the six temps and X and made them equal to 14. Is this correct? If so mine didn't turn out so pretty.

2007-09-05 12:31:34 · 7 answers · asked by Anonymous in Mathematics

2007-09-05 12:31:09 · 4 answers · asked by Samantha 1 in Mathematics

2007-09-05 12:29:22 · 5 answers · asked by ash_rash_13 1 in Mathematics

5/13 + 2/5
5/6 - 4/15
13/14 - 1/2
7/8 - 1/2
1/4 + 3/10
1/5 - 1/13

2007-09-05 12:27:59 · 12 answers · asked by Anonymous in Mathematics

A map indicates that two cities are 200 miles apart. The scale of the map is

3/4in. = 25miles

How many inches apart are the cities on the map??

2007-09-05 12:25:44 · 6 answers · asked by Reece 1 in Mathematics

A canoe has a velocity of 0.310 southeast relative to the earth. The canoe is on a river that is flowing at 0.560 east relative to the earth. Find the magnitude of the velocity of the canoe relative to the river.

2007-09-05 12:25:20 · 2 answers · asked by Anonymous in Physics

answer these place parentheses in the right spot

1) 2+5*4-3 = 25

2) 2=5*4-3 = 19

3) 2+5*4-3 = 7

4) 3+2-6+8 = 70

2007-09-05 12:24:43 · 4 answers · asked by Anonymous in Mathematics

help me w/ theese:

x + 2.7 > 5.5

x + 8 > 11 (the greater than sign is suppose to be a greater than/equal to sign)

2007-09-05 12:23:43 · 6 answers · asked by Reece 1 in Mathematics

how would i expand this?

2007-09-05 12:23:19 · 6 answers · asked by C.L. ~Raptors~ 4 in Mathematics

Assume 50 men and women are randomly selected. Of these, 40% are men and 27 of the 50 persons read on a regular basis. Further, of the men, 15 do not read on a regular basis. Prepare a contingency table.

2007-09-05 12:20:53 · 2 answers · asked by JustWondering 3 in Mathematics

2007-09-05 12:20:06 · 3 answers · asked by maghadeera 2 in Physics

2007-09-05 12:20:02 · 1 answers · asked by sakaki 1 in Botany

When experimenting with pendulums, I began wondering about several things. First of all, we were required to obtain a string and make a loop 40 cm from the top tip. After 20 seconds we were to measure the number of swings, and then perform the same experiment three times for string with a length of 80 cm and 120 cm. Is it correct that as the length of the string increased, the number of swings decreased? Why is this so? Will adding more weight to the string make a noticeable difference? Dividing the average number of swings per length of string after testing 3 times by 20(seconds) produced larger numbers than when dividing the average number of swings for the shorter string. Would that not mean that the linger the string on the pendulum, the more swings? Unfortunately I could not find a source to explain this, and I would hope that certain individuals with knowledge about this experiment could shed some light. Many thanks!

2007-09-05 12:17:58 · 3 answers · asked by Quasar 2 in Physics

A rectangualr rug is 15 ft wide && 20 ft long. If you cut the rug along its diagonal, what will be the dimensions of one of the resulting triangular pieces??

i 4got how to do this. can some one please help me??

please explain what i have to do b/c im a lil frazzled!

2007-09-05 12:17:13 · 5 answers · asked by Reece 1 in Mathematics

The density of 2-propanol is 0.79 g/mL at 25 degrees Celsius
The density of water is 1.00 g/mL at 25 degrees Celsius. What qualitative observations could you expect to make if these two substances were mixed together?

Thanks so much!

2007-09-05 12:14:39 · 2 answers · asked by Baby facee 1 in Chemistry

-1> 2r-5> -9

2007-09-05 12:12:04 · 7 answers · asked by whereistheemu 1 in Mathematics