Science & Mathematics - 28 November 2006

as 50 is to 80?

2006-11-28 09:02:13 · 13 answers · asked by electra 1 in Mathematics

I have this friend, when he approaches his finger to the window, it becomes humid, as if he is intiating heat or sth... does anyone know why? IT DOESNT WORK WHEN I TRY IT

thxxxxxx

2006-11-28 09:01:44 · 5 answers · asked by Karen 2 in Paranormal Phenomena

please help me with Descartes' Method!!!! thx~~
Find the equation of the tangent line using Descartes' Method!!! plz~ help? Make sure have to use Descartes' Method
i knows the way to do with derivative
Find the equation of the tangent line to the following functions,
using Descartes' Method.

#1 f(x) = x^2, at, (2,4)
#2 f(x) = x^3+7x, at, (1,8)
#3 f(x) = x, at, (-3,3)

Could u guys help me to get tangent line of equation above
3 problems??? have test help thx!!!

about Descartes' Method.
1. (x-xo)^2+y^2 = (x1-xo)^2+(y1)^2
substituting f(x) for y in the above equation, we get:
(x-xo)^2+(f(x))^2 = (x1-xo)^2 + (y1)^2

2006-11-28 09:00:26 · 2 answers · asked by Anonymous in Mathematics

(8 -radical10)(5- radical10)

2006-11-28 08:59:39 · 3 answers · asked by Anonymous in Mathematics

Alright, here's the question :

Write the expression as a logarithm of a single quantity --
(It's a lot easier to write this and show a picture)
Here's the link.. http://tinyurl.com/wyvnh
Please show work.. thanks!

2006-11-28 08:58:40 · 2 answers · asked by Lottery 1 in Mathematics

2006-11-28 08:58:21 · 6 answers · asked by ME 3 in Mathematics

2006-11-28 08:58:03 · 6 answers · asked by Mark L 1 in Physics

Is there diffusion in the vacuum due to continuous creation and annihilation? Wouldn't there be a net drift?

2006-11-28 08:57:02 · 2 answers · asked by Lorelei 1 in Physics

The equation for cellular respiration is:
C6H12O6+6O2----) 6CO2+ 6H2O+ energy

I need to know where the C6 comes form to be used in Cellular repsiration and then goes to after it is used.
Also where the H12O comes from and then goes to.
Also where the 6O2 comes from and goes to.
Thanks for the help!

2006-11-28 08:56:54 · 1 answers · asked by 000123 2 in Botany

i'm talking about recently extinct.. like in the past 100 to 60 years. considering how far we've advanced and how much further we will continue to advance, is there any chance we can reverse some mistakes like the extinction of the tasmanian tiger or the dodo or many of the creatures that have gone extinct within the past hundred years (yes, i know, the dodo has probably been gone a lot longer than 100 years... but you catch my drift)

2006-11-28 08:54:41 · 6 answers · asked by crush the turtle 4 in Zoology

If reality is virtually a system of checks and balances between a group of peoples sensory perceptions of currently existing situations and circumstances, how would you know if something others did not have a sensory experience of ever happened? And would that phenomenon you experienced be considered real or imaginary, since it cannot be substantiated by others?

2006-11-28 08:51:07 · 6 answers · asked by Anonymous in Paranormal Phenomena

a.) neptune
b.) saturn
c.) jupiter
d.) uranus
e.) pluto

2006-11-28 08:50:47 · 3 answers · asked by ramirez 1 in Astronomy & Space

i need help with it can you help me tell me what it is and name one specific sedimentary rock. Thanks

2006-11-28 08:47:53 · 6 answers · asked by jennafer m 1 in Earth Sciences & Geology

1: If .4% of a quantity is 2.4, find the total quantity.
24
600
120
66


2: $250 is what percent of $200?
115%
120%
125%
130%


3: If a man sold 175% of his quota and he sold 35 articles, what was his quota?
15
17
20
23


4: What is 250% more than 200?
600
650
675
700


5: What is 30% less than 400?
140
280
340
360


6: Correct to the nearest tenth of a percent, what grade would you receive on 16 correct out of 27 questions?
59.3%
45.9%
50.1%
61.4%


7: The population of a city was 62,500. In ten years it increased 5.4%. What was the population then?
64,235
65,875
67,000
68,250


8: At age 25 a man had saved $4,000. At age 45 his savings were $18,000. What percent had his savings at age 45 increased over his savings at age 25?
450%
350%
275%
325%


9: A man's salary increased from $60 a week to $80 a week. What percent of increase in salary was this?
25%
20%
33 1/3 %
40%


10: A bicycle was reduced from $60 to $48. What percent of decrease was this?
40%
33 1/3%
27.5%
20%


11: A factory increased its production 130%. The new production is what percent of the old?
130%
430%
230%
330%


12: The price on a suit was decreased by 24%. If the old price was $45, what was the new one?
$36.80
$40.00
$36.60
$34.20


13: Eighty percent of the students in a school, or 680 of them, contributed to the school's social fund. How many students are there in the school?
770
820
850
895


14: The prices of all meats increased 5% per pound. In what sense were the increases unequal?
percent increase
types of items increased
price increase
number of items increased


15: At the end of the first year a baby should weigh about 300% of its weight at birth. If a baby weighs 8 1/2 lb. at birth, what should it weigh at one year?
24 3/4 lbs
25 lbs
24 1/2 lbs
25 1/2 lbs


16: When asked how a charity campaign was going, the secretary said that they had raised $12,000 and had 20% more to go to meet the goal. What was the goal?
15,000
14,500
15,500
17,000


17: On an airplane a passenger may carry 40 pounds of baggage free. For each pound over 40 pounds, the passenger must pay 1/2 % of the total fare. If the baggage weighs 54 pounds and the fare is $35, what is the extra charge?
$3.10
$2.45
$2.20
$3.00


18: 80% more than 90 =
152
159
162
171


19: 25% less than ___ = 125
150
170
162
166 2/3


20: ___ % less than 40 = 32
20
25
22.5
16


21: 275% of a number is what percent more than the number?
275
175
75
135


22: From the weight of beef as sold in the butcher shop, 40% must be subtracted to give the weight when it is roasted and ready to serve. There are 10 people, each of whom is to be served 1/4 pound of roasted beef. What weight should be bought at the shop?
4 1/6 lbs
5 lbs
4 3/4 lbs
5 1/6 lbs


23: In planting wheat a farmer estimates that 90% of the seed will grow. If he needs 500 pounds of wheat that will grow, how much wheat should he plant?
610 lbs
580 1/7 lbs
555 5/9 lbs
532 1/2 lbs


24: In measuring the length of a lot, a surveyor makes an error of 0.2 of a foot. The length correct to the nearest tenth of a foot is 67.4 feet. What percent of error did the surveyor make?
0.3%
0.55%
0.63%
0.7%


25: Mr. Brown owned a house that he had bought for $15,000. He sold it at an increase of 15 percent to Mr. Abbott. Later he bought it back from Mr. Abbott at a decrease of 15 percent of what Mr. Abbott paid. What did Mr. Brown make on these deals?
$384.20
$425.50
$337.50
$355.00

2006-11-28 08:47:40 · 6 answers · asked by Anonymous in Mathematics

A Professor replied:
A quarter of the time from noon till now is added on to an half of the time from now till noon tomorrow, the answer is the time now.

What is the time when the professor replied?

2006-11-28 08:47:06 · 6 answers · asked by rma 1 in Mathematics

mine:mathematics

2006-11-28 08:46:46 · 13 answers · asked by Anonymous in Mathematics

1: A man's pay for selling goods increased from $55 to $137.50. What percent increase was this?
50%
125%
150%
163%


2: A mixture of 8 parts in 1500 is approximately what percent?
8/15 %
1/2 %
7/19 %
3/4 %


3: If the tax on $1684 is $35, what is the rate?
5.2%
3.3%
2.1%
1.9%


4: The dollar result of an increase of nine percent on $90 is less than the result of a decrease of eleven percent on $110.
Is this true of false?
True
False
Both
Neither


5: A pint (16 fluid ounces) of an antiseptic was marked 6% iodine. How many ounces of iodine were there in a pint?
0.75 oz
0.80 oz
0.84 oz
0.96 oz


6: If from 1900 to 1950 the cost of a 14-ounce loaf of bread increased from 5 cents to 19 cents, what percent increase was this?
180%
280%
320%
250%


7: A merchant sold strawberries at 40 cents a quart. To get rid of the last few boxes he marked them at 20 cents a quart and put up a sign 100% cut in price. Was this correct?
Yes
No
Both
Neither


8: A club raised $50. This was 125% of their goal. What was their goal?
$30
$35
$40
$45


9: Mary tried 30 problems and solved 22 correctly. John tried 36 problems and solved 26 correctly. Who had the better score?
Mary
John
Both
Neither


10: On a suit sale John bought a $50 suit for $35. Bill bought a $40 suit for $27. Which boy made the better bargain?
John
Bill
Both
Neither


11: Ben sold vegetables at a stand and received $8 for selling $60 worth of vegetables. John, who worked at another stand, received $12 for selling $72 worth. Who received the higher rate?
Ben
John
Both
Neither

2006-11-28 08:46:36 · 9 answers · asked by Anonymous in Mathematics

A) What could you use as ballast?
B) What happens if you add or remove some of this ballast?

2006-11-28 08:45:19 · 2 answers · asked by Anonymous in Engineering

where does wax come from? what is wax?

2006-11-28 08:43:24 · 7 answers · asked by Anonymous in Chemistry

just want elementary terms please..

2006-11-28 08:42:20 · 7 answers · asked by ? 3 in Biology

a.) saturn would sink like a rock, due to its denser core.b.)saturn could float.
c.) it would precipitate helium into the tub.
d.) saturn would explode upon contact with water.
e.) saturn would drown, because it does not know how to swim.

2006-11-28 08:42:11 · 6 answers · asked by ramirez 1 in Astronomy & Space

I have this "object" with "FOUR THINGS" on it, if I cut off "ONE THING" it then has "FIVE THINGS"!!! What are the "THINGS"????

2006-11-28 08:40:47 · 12 answers · asked by Anonymous in Physics

x+y=4
x-y=8.5

2006-11-28 08:39:58 · 2 answers · asked by skymei21 1 in Mathematics

I dig worms for my big bird (don't tell me about parasites please, he is fine after 20 months of this) and sometimes I get a dark greenish worm. Maybe 10 percont of the worms. What causes this?

2006-11-28 08:39:48 · 4 answers · asked by thisbrit 7 in Zoology

my grade is 83.9% in math. not quite an A. how can I get my teacher to give me an A??? an A is 86% or 85.5% or higher because it would be rounded up.

2006-11-28 08:39:40 · 7 answers · asked by casper??!! :P 2 in Mathematics

what does (lnx)^2 equals to? so if it's 3(lnx)^2 then it equals to what??

2006-11-28 08:39:21 · 1 answers · asked by biscuits 2 in Mathematics

2006-11-28 08:38:45 · 5 answers · asked by Anonymous in Earth Sciences & Geology

2006-11-28 08:37:45 · 14 answers · asked by gooseberry 1 in Mathematics

2006-11-28 08:36:24 · 3 answers · asked by prime time 1 in Earth Sciences & Geology

until the egg becomes positivetly buoyant (floats). How much salt do you use?

2006-11-28 08:36:04 · 6 answers · asked by Anonymous in Physics