Mathematics - 6 November 2007

the speed of sound is approximatly 1100 feet per second.
explain how to estimate how far away a storm is by counting the seconds between the lightning and hearing the thunder.



if a takes a snail 10 seconds to travel an inch howfar could the snail trael in a hour.


the directions on a powdered lemonade can say to use to scoops of mix to make an 8 ounce glass of lemonade. how many scoops are needed to make a
quart
10 ounce glass
12 ounce glass
liter

2007-11-06 23:58:40 · 9 answers · asked by Anonymous

4. Three-dimensional figures made of polygons are called polyhedrons.
A. true
B. false

5. A solid with circular bases and a lateral curved surface that is a rectangle when flattened out is a cone.
A. true
B false

14. A segment from the vertex of a pyramid to a side of the base is called a slant height.
A. true
B. false

15. A prism with 6 square faces is called a hexahedron.
A. true
B. false

how do i find the volume,surface area,

2007-11-06 23:50:22 · 2 answers · asked by Anonymous

Two numbers have a sum equal to 50. Their difference is 16. To figure out what the numbers are, you must first identify the variables. What are the variables in this problem?

a)the sum and difference of the numbers
b)the difference of two numbers is 16
c)the 2 numbers
d)the numbers sum to 50

2007-11-06 23:40:52 · 5 answers · asked by letstalkbuiz 1

what is the easiest way to calculate using cramers rule

2007-11-06 23:35:25 · 2 answers · asked by Anonymous

1. Whitney wants to close off a rectangular area in his lawn so that he can leave his dog outside. He buys enough fencing to close off 252 square feet of lawn.If the length of the enclosure is 21 feet, what is the width?
A. 12 feet
B. 14 feet
C. 231 feet
D. 273 feet

2. The diagram below gives the lengths of all but one side of a pentagon
ABCDE.
What is the perimeter of pentagon ABCDE?
A. 39 cm
B. 42 cm
C. 43 cm
D. 44 cm

3. Which of the figures below has an area of ?

4. Ray wants to fence a rectangular region for his dog. The length of this region should be at least 60 feet. The width should be greater than 20
feet and the distance around should be no more than 200 feet. Which dimensions could
be used to build the fence for Rays’ dog?
A. 25 feet by 80 feet
B. 30 feet by 75 feet
C. 35 feet by 60 feet
D. 40 feet by 55 feet

5. Which of the following masses is the smallest?
A. 4 centigrams
B. 40 grams
C. 0.4 kilogram
D. 400 milligram
http://i118.photobucket.com/albums/o117/Hannahrae2011/untitled-9.jpg

2007-11-06 23:33:18 · 2 answers · asked by Anonymous

i nid answers asap..

2007-11-06 21:14:19 · 5 answers · asked by sam1uknow36 2

For the first one, I know pi = 3.14somethingsomething but I'm stuck on everything else. Can you pull that out of the integral sign because it's a constant?

The second one I actually solved!!! Is this right:
(cos3x)^5 = [(cos3x)^6] /6 *times* -sin3x

I have a feeling I'm wrong.

2007-11-06 21:00:13 · 2 answers · asked by Anonymous

I'm curious about people who are very good at math. How do you think? When you see a complex equation how do you think of it as? Does an image of how it looks on a graph automatically form in your mind? Can you easily distinguish where the different parts of it came from? Does it "talk" to you and tell you what it is, or is it a big mystery until you actually run some numbers through it?

How do you perceive things?

2007-11-06 19:35:36 · 8 answers · asked by justwondering 6

i have a homework question. i have to solve for x. the problem is 10^x+3 = 6^2x..... so far i got (x+3)log10 = 2xlog6. how do i isolate x?

2007-11-06 19:03:07 · 3 answers · asked by Anonymous

As a mathematical term, do you pronounce it as:

a) low-cuss
b) lock-us

I thought a) was correct...is there are difference in how American/British pronounce it?

2007-11-06 18:41:59 · 15 answers · asked by nandayo 1

Can't remember how to do this, can someone explain and show work?

The length of a rectangular box is 3cm more than the width and the height is 1 cm more than half the width. The volume is 216 cm^3. Recall that V=lwh

a) Algebraically determine the dimensions of the box.

b) Graphically determine the dimensions of the box.

2007-11-06 18:38:21 · 7 answers · asked by Anonymous

This is the definition:
http://www.webassign.net/www28/symImages/2/5/3d2901ea25c4de1db1c01fa4fc587a.gif

This is the information given:
http://www.webassign.net/www28/symImages/5/0/511f2d8cdb5d33e354614d46e4fa37.gif

This is the answer:
http://www.webassign.net/www28/symImages/3/a/760fc431fd49351e81fe8fc0a03e85.gif

Why is it 1+10i/n (inside the radical) instead of just 10i/n?

2007-11-06 17:42:25 · 2 answers · asked by enhancedbycolor 2

QUESTION: The circumference of a sphere was measured to be 81cm with a possible error of .5cm. Use differentials to estimate the maximum error in the calculated surface area.

Circumference=2pi*r Surface Area=4pi*r^2

if anyone knows the max error and relative error let me know thanks.

2007-11-06 17:36:42 · 4 answers · asked by BLAHHH need help 1

2007-11-06 17:31:41 · 2 answers · asked by SmarterChild 1

2007-11-06 17:28:02 · 6 answers · asked by Anonymous

I know it's easy....

2007-11-06 17:15:52 · 11 answers · asked by Ewan ko poh... 1

Is it used to simplify problems? What kind of conclusions can be reached with logs? Please dumb it down for me.

2007-11-06 17:11:03 · 10 answers · asked by MaDeInCaLi 2

4x^3 + 4y = 0

and

4y^3 + 4x = 0

2007-11-06 17:07:27 · 4 answers · asked by Anonymous

z=(x+y)/2 z=(x^2+y)/5 z=(x^3+y)/14

Solve for x y and z

2007-11-06 16:58:40 · 4 answers · asked by steve 1

Estimate the percentage of polonium (^210 Po) that remains in a sample after 2 years. Round to the nearest hundredth of a percent. (note...half life of 138 days)

also....

The Rhind papyrus contains most of what we know today of ancient Egyptian mathematics. A chemical analysis of a sample from the papyrus has shown that it contains approx. 75% of its original carbo-14. Estimate the age of the Rhind papyrus.

2007-11-06 16:52:44 · 2 answers · asked by K Rose 3

how can I proove Fermat's last theorem, please help, homework due tomorrow!

2007-11-06 16:48:24 · 3 answers · asked by Anonymous

How can I find the maximum of this? Taking the derivative results in 2^x * ln2 - 3^x *ln3, which I don't know how to solve for 0.

2007-11-06 16:34:55 · 5 answers · asked by Andrew S 2

find the equation of the tangent to the curve y = 2x - x^2 that is perpendicular to the line x + 4y - 8 = 0

2007-11-06 16:31:09 · 3 answers · asked by Anonymous

http://i40.photobucket.com/albums/e215/xxs3xp1stolxx/Algebra%20II/304a/Picture4.png

2007-11-06 16:29:01 · 4 answers · asked by Anonymous

A ruptured oil tanker causes a a circular oil slick on the surface of the ocean. When its radius is 150 meters, the radius on the slick is expanding by 0.1 meter/minute and its thickness is 0.02 meter. At that moment:

a How fast is the area of the slick expanding?

b The circular slick has the same thickness everywhere, and the volume of the oil spilled remains fixed. How fast is the thickness of the slick decreasing?


Please Help

2007-11-06 16:28:13 · 2 answers · asked by hud 3

http://i40.photobucket.com/albums/e215/xxs3xp1stolxx/Algebra%20II/304a/Picture2.png

2007-11-06 16:27:10 · 7 answers · asked by Anonymous

sin² 180/18 + sin²180/9 + sin² 7X180/18 + sin²4 X 180/9 = 2

prove it

Question from book R.D Sharma Class-XI of chapter: Trigonometric functions..


plz help me

2007-11-06 16:14:26 · 3 answers · asked by Amar 2

All of the adjacent sides of quadrilaterals have slopes with a product of -1?

2007-11-06 16:11:41 · 2 answers · asked by dazed and confused 2

Say the 5-digit number is 78251.

2007-11-06 15:56:27 · 4 answers · asked by ¤j¸g ± 1

2007-11-06 15:48:07 · 2 answers · asked by babysugar94 1