Science & Mathematics - 25 October 2007

I was recently talking to someone as we were looking out across the ocean about this. I wonder how far the very farthest point is that you can see (where the water meets the sky) supposing the weather is clear and everyhting.

2007-10-25 12:35:18 · 22 answers · asked by Hammond 2 in Geography

PureBred tall plants with round seeds are crossed with purebred short plants with wrinkled seeds. Some of the offspring are then crossed with an unknown plant. The offspring from this second cross are 1/2 tall round and 1/2 tall wrinkled. What are the genoype and pheotype of the unknown plant?

2007-10-25 12:31:00 · 3 answers · asked by Eric 1 in Biology

2007-10-25 12:29:21 · 2 answers · asked by AssaultX 2 in Mathematics

10---- Find, in radical form, the distance between the points (-3,7) and (4,2)



12--- 4x^2-9 * 4x-8 Simplify (the line thing I made is division)
______ _____
2x^2-x-6 2x+4

13---- Solve the following system of equasions graphically and check

y=x^2-8x+10

y=x-8

Is this the kind where you graph each seperatley then get the point where they cross? and i know how to graph the second one but can you put the 1st on in y=mx for or whatever you need to solve it

Thank you very very much!

2007-10-25 12:27:17 · 3 answers · asked by Anonymous in Mathematics

2007-10-25 12:26:54 · 1 answers · asked by Anonymous in Mathematics

a. 5a^4+4a^3+3a^2+10a-12
b. a^4-a^3-2a^2-8
c. a^4-6a^2-8
d. a^4+2a^2+10a-12

2007-10-25 12:23:35 · 4 answers · asked by Anonymous in Mathematics

2007-10-25 12:23:15 · 8 answers · asked by Anonymous in Astronomy & Space

find the 1800th derivative of f(x)=xe^-x

i thought it would work out to be e^-x(1800-x)
but thats not right.... and i tried everything i could think of and i'm not getting this right..
pleaseee help!!

2007-10-25 12:23:00 · 2 answers · asked by Anonymous in Mathematics

(Italy is tight) plz answer quick

2007-10-25 12:22:52 · 4 answers · asked by Nikolebas 2 in Geography

2007-10-25 12:20:51 · 2 answers · asked by tuan l 2 in Biology

The length of a rectangle is four times as long as its width. If the area is 100 m^2 what is the length of the rectangle?

2007-10-25 12:20:31 · 2 answers · asked by crocsroc 2 in Mathematics

Maybe the smoke is getting into the upper atmosphere and reaching Northern Ohio. Volcanoes can do this.

2007-10-25 12:12:23 · 6 answers · asked by pschroeter 5 in Weather

a)How many grams of calcium carbonate would be needed to react completely with 15.0 grams of the acid?
b) How many grams of carbon dioxide would be produced in this reaction?
c) How many grams of calcium chloride would be formed at the same time?

Formula: CaCO3 + 2HCl ----> CO2 +H2O + CaCl2

Im completely lostt and i hate stoichiometry! It seems so hard, so if you can help me, thank you very much! Include steps please!

2007-10-25 12:10:40 · 2 answers · asked by lalala 1 in Chemistry

also, do they bisect each other?

2007-10-25 12:10:21 · 1 answers · asked by danknka b 1 in Mathematics

2007-10-25 12:08:55 · 1 answers · asked by danknka b 1 in Mathematics

what would you call it and why?

2007-10-25 12:08:07 · 6 answers · asked by ? 7 in Astronomy & Space

If his distances were too small by a factor of 7, what answer should he have obtained?

2007-10-25 12:07:56 · 3 answers · asked by nowshernitu 2 in Astronomy & Space

2007-10-25 12:07:42 · 3 answers · asked by victories@sbcglobal.net 1 in Geography

Can you please show me how to do it step by step. Thanks! A good answer will earn 10 points.

How fast does the radius of a spherical soap bubble change when you blow air into it at the rate of 15 cubic centimeters per second?

2007-10-25 12:00:54 · 1 answers · asked by Anonymous in Mathematics

2007-10-25 11:57:36 · 2 answers · asked by Jacqueline s 1 in Geography

Question 1:

A 440 g hoop 200 cm in diameter is rotating at 252 rpm about its central axis. What is its angular momentum?


Question 2:

A weightlifter's barbell consists of two 35-kg masses on the ends of a 20-kg rod 1.6 m long. The weightlifter holds the rod at its center and spins it at 7 rpm about an axis perpendicular to the rod.
What is the magnitude of the barbell's angular momentum?

Question 3:

Engineers redesign a car's wheels with the goal of decreasing each wheel's angular momentum by 23% for a given linear speed for the car. Other design considerations require that the wheel diameter go from 38 cm to 35 cm. If the old wheel had a rotational inertia of 0.42 kg·m2, what must be the new wheel's rotational inertia if the engineers are to achieve their goal?

2007-10-25 11:56:30 · 1 answers · asked by nathanr20 1 in Physics

Solve for x
4x^2 – 36 = 0
thankyou

2007-10-25 11:53:15 · 15 answers · asked by mormar 1 in Mathematics

Yes, i know i asked this already, but i need a more clear understanding of how you get the answer?


-questions i have-

Is there an actual answer? Like since its consecutive numbers ex. 1,2,3,4...or is it more of a why answer?

Help! Thankes!

2007-10-25 11:49:11 · 7 answers · asked by The One the Only. 1 in Mathematics

Which two statements form the following biconditional? "Two angles are congruent if and only if they have the same measure."

A. If two angles are congruent, then the sum of their measures is twice the measure of one of the angles.
The two angles have the same measure.

B. If two angles are congruent, then they have the same measure.
These angles are congruent.

C. If two angles are congruent, then they have the same measure. If two angles have the same measure, then they are congruent.

D. If two angles have the same measure, then they are congruent. If two angles add up to 180 degrees, then they are supplementary.


???????????/

2007-10-25 11:49:05 · 2 answers · asked by Anonymous in Mathematics

TRUE OR FALSE if false explain why
1. if graph of function has 3 x-intercepts, yhen it must have atleast 2 points at which its tangent line is horzontal.

2. If graph of a polynomial function has 3 x-intercepts then it must have atleast 2 points at which tangent line is horizontal

3. If a function is continuous on closed interval, then it must have a minimum on the interval.

4. every nth-degree polynomial has (n-1) crtical numbers

5.An nth-degree polynomial has at most (n-1) critical numbers

2007-10-25 11:48:41 · 4 answers · asked by ford 2 in Mathematics

f(x)=9x^3-4


Help with the steps?

2007-10-25 11:47:31 · 7 answers · asked by Anonymous in Mathematics

four times the 10's digit of a 2 digit number increased by the unit digit is 18. if the digits are reversed, the new number is 9 less than twice the original number. find the original number.
SHOW YOUR WORK TO GET BEST ANSWER!!!!

2007-10-25 11:41:26 · 6 answers · asked by Anonymous in Mathematics

I have no clue how to do this math problem and it is not 10:15 for the answer!

2007-10-25 11:39:34 · 8 answers · asked by angel94 2 in Mathematics

help plz

2007-10-25 11:39:03 · 5 answers · asked by Anonymous in Zoology

2007-10-25 11:38:45 · 2 answers · asked by Anonymous in Chemistry