Science & Mathematics - 8 October 2007

thirty students bought pennants for the football game. Plain pennants cost $4 each and the fancy ones cost $8 each. If the total bill was $168, how many students bought the fancy pennants?

i was supposed to make a chart for this
number [times] price = cost
fancy F[thats a variable]
plain

please dont just give me the answer, explain so that i can do the rest of my hw!!!!

2007-10-08 12:46:32 · 6 answers · asked by ♥ 3 in Mathematics

2007-10-08 12:45:57 · 3 answers · asked by Anonymous in Chemistry

You plan to make 6 times a chili recipe and 6 times a guacamole recipe. The chili calls for 2/3 cup of chopped tomatoes and guacamole needs 3/4 cup. One small tomato makes about 1/2 cup of chopped tomatoes. Will 12 small tomatoes be enough?

2007-10-08 12:45:18 · 11 answers · asked by I ♥ Music 2 in Mathematics

2007-10-08 12:43:51 · 9 answers · asked by CelticMoonGoddess 2 in Mathematics

2007-10-08 12:41:39 · 3 answers · asked by uknowuluvme 1 in Mathematics

Calculate the number of moles of oxygen gas produced from the complete catalyzed decomposition of 6.20ml sample of a 3.5% solution of H2O2. The density of the 3.5% solution of H2O2 is 1.01 g/ml.

i cant figure out how to do this

2007-10-08 12:39:42 · 1 answers · asked by mzglobicki2 1 in Chemistry

2007-10-08 12:38:39 · 2 answers · asked by CelticMoonGoddess 2 in Mathematics

http://tinypic.com/view.php?pic=1dzdxw&s=2

1) What postulate or theorem justifies the statement triangle ABC~ triangle RST?

2) What postulate or theorem justifies the statement triangle SQR ~triangle VTU?

Thanks.

2007-10-08 12:33:13 · 1 answers · asked by acetone33432 1 in Mathematics

I love wordplay, but actually am kinda' curious on this one. If you don't already know, any organic matter can be processed into synthetic diamonds - some folks even have their deceased loved ones preserved in that manner. So if x = number of average-sized carrots processed into a synthetic diamond, solve for "x" in this equation:

x carrots = 1 carat

Curious. :-)

2007-10-08 12:32:02 · 10 answers · asked by uncleclover 5 in Other - Science

i have found titanium in a gravel pit that i own and i'm looking for the best way to extract it from sand

2007-10-08 12:32:01 · 6 answers · asked by ron_boulard 1 in Earth Sciences & Geology

2007-10-08 12:28:38 · 2 answers · asked by determined000 1 in Mathematics

A railway car is in the shape of a rectangular prism. The railway car is 3 m wide, 20 m long and has a height of 2.8 m. determine then volume of the railway car in cubic cm.
okay there is 100 cm in 1 m so 3 x 100= 300, 20 x 100 =2000, 2.8 x 100= 280. I multiplied all of them and I got 168000000 cubic centimeters. Is this right? if wrong I'm I suppose to add all of them instead of multiplying all of them? Thank you

2007-10-08 12:28:08 · 5 answers · asked by Anonymous in Mathematics

a) every meridian is actually a circle rather than a line.
b) Every meridian is the same length and has the same beginning and end.
c) Every parallel begins and ends at the poles.
d) Every parallel is the same length.

2007-10-08 12:27:42 · 6 answers · asked by peoplegocrazi =] 2 in Earth Sciences & Geology

i have just started physics. every now and then, i will see a problem and it asks for the dirrection and magnitude or something and magnitude, or just magnitude. what is magnitude. please make your answer idiot proof please.

thank you!

2007-10-08 12:26:57 · 14 answers · asked by Elizabeth 3 in Physics

d=0.02(3v*v + 20v + 1000) where v=m/s
determine the speed at which the safe stopping distance is 30m, correct to one decimal.

2007-10-08 12:25:43 · 1 answers · asked by yeshila 1 in Physics

its a question on my bio study guide. i need helpp!!

2007-10-08 12:25:23 · 7 answers · asked by who 1 in Biology

If I wanted to analyze a human gene that encodes a protein produced only in the liver, would I be able to find that gene in cheek cell DNA? How? Why?

2007-10-08 12:24:08 · 5 answers · asked by chemistrygal 1 in Biology

science pop quiz!

2007-10-08 12:22:56 · 4 answers · asked by Anonymous in Physics

2007-10-08 12:22:10 · 4 answers · asked by dvassall3 1 in Earth Sciences & Geology

2007-10-08 12:22:05 · 1 answers · asked by skwarren2009 2 in Chemistry

A reaction of 0.028g of magnesium with excess hydrochloric acid generated 31.0 mL of a gas. The gas was collected by water displacement in a 22 degree celsius water bath. The barometric pressure in the lab was 746 mm Hg. Using Dalton's Law and the vapor pressure of water at 22 degrees celsius, calculate the partial pressure of hydrogen gas. Use the combined gas law to calculate the "corrected" volume of hydrogen at STP.

2007-10-08 12:20:00 · 1 answers · asked by Anonymous in Chemistry

HELP PLEASE !!! BRAIN FREEZE...

2007-10-08 12:15:32 · 10 answers · asked by CelticMoonGoddess 2 in Mathematics

My calculus derivative is:
5/3x^2/3=1

How do you solve for x?
It's supposed to be .46 or (3/5)^3/2

2007-10-08 12:13:54 · 7 answers · asked by NiNi 3 in Mathematics

4.95 the 4 is underlined 8.425 the 2 9.74 the 7
0.47 the 4 5.019 the 0 1.062 the 6

2007-10-08 12:13:17 · 3 answers · asked by nubian71 2 in Astronomy & Space

The active agent in many hair bleaches is hydrogen peroxide. The amount of hydrogen peroxide in 17.0 g of hair bleach was determined by titration with a standard potassium permanganate solution.
2 MnO4-(aq) + 5 H2O2(aq) + 6 H+(aq) 5 O2(g) + 2 Mn2+(aq) + 8 H2O(l)

what is the mass % of H2O2 in this equation the givens r .402g of H2O2, 4.73X10^-3 moles of MnO4 and 1.18X10^-2 moles of H2O2

2007-10-08 12:11:46 · 1 answers · asked by cj 2 in Chemistry

1. x^2-13x+36+0

2. x^2+3x=0

3. x^2=-11

2007-10-08 12:11:39 · 4 answers · asked by skymei21 1 in Mathematics

What is the equation of the line tangent to point P on this circle:
(x-2)^2 + y^2=10
P=(1,-3)

Explanation a plus!

2007-10-08 12:05:48 · 8 answers · asked by Michael Skarn 3 in Mathematics

I do not understand how to do this problem? Please explain when giving an answer so I can understand this! Thanks!
The measure of an interior angle of a regular polygon is 120. Find the number of sides.

2007-10-08 12:03:16 · 6 answers · asked by Anonymous in Mathematics

2007-10-08 12:03:08 · 3 answers · asked by Anonymous in Other - Science

2007-10-08 12:02:18 · 5 answers · asked by Harley 1 in Mathematics