I am having a problem figuring out this dot product thing. i am to find the smallest angle between the pair of vectors <-3,2>,<4,5>. ok, so i have cosa=<-3,2><4,5> / |<-3,2>| |<4,5>|. i have a -2 for the top part of the fraction but i have no clue how to do the bottom. the answer says it's (sqrt13)(sqrt14) and then go from there. how do i get the square roots of 13 and 14?

2006-12-19 13:27:35 · 5 answers · asked by sparkydog_1372 6 in Mathematics

2 ⤊

what wild animals can a wolf beat in a fght or stand a shot?

????????/

2006-12-19 13:26:29 · 5 answers · asked by matty z 1 in Zoology

3 ⤊

sinx cosx(x+y) - cosx sin(x+y)?

how do u do this i need help plzz :(

2006-12-19 13:25:57 · 7 answers · asked by Anonymous in Mathematics

1 ⤊

Factoring polynomials help?

What are the steps to factoring a polynomial when a is greater than one?

ex. 2m^2 - 11m + 15

2006-12-19 13:24:47 · 9 answers · asked by Poj23 2 in Mathematics

0 ⤊

suggest the best possible shape of aluminium sheet to reduce the production cost?

2006-12-19 13:24:44 · 3 answers · asked by Anonymous in Mathematics

0 ⤊

Can anyone help?

I really need help on Balancing Equations. i dont get it at all... Can anyone help me.. please?

2006-12-19 13:23:19 · 7 answers · asked by Anonymous in Chemistry

1 ⤊

Where does the most snowfall happen?

Where does it snow the most?

2006-12-19 13:21:21 · 4 answers · asked by bosco6027 1 in Geography

0 ⤊

Is it true that now a day Carrion Birds are reproducing faster than some time before?

2006-12-19 13:18:19 · 2 answers · asked by Ed12345 1 in Zoology

0 ⤊

Use a special product formula to factor the perfect square trinomial.?

b2 + 8b + 16

2006-12-19 13:17:30 · 8 answers · asked by styles4u 4 in Mathematics

2 ⤊

do humans have hair on thier tongues?

2006-12-19 13:17:16 · 8 answers · asked by shane j 1 in Biology

1 ⤊

cos^3 y + cos y*sin^2 y =?

y is not in the exponent

2006-12-19 13:17:13 · 6 answers · asked by DadinTrouble 1 in Mathematics

0 ⤊

physics help please?

A golf ball is hit at ground level. The ball is
observed to reach its maximum height above
ground level 4.3 s after being hit. 0.61 s after
reaching this maximum height, the ball is
observed to barely clear a fence that is 186 ft
from where it was hit.
The acceleration of gravity is 32 ft/s^2.
How high is the fence? Answer in units of
ft.

2006-12-19 13:16:08 · 4 answers · asked by Anonymous in Physics

12 ⤊

Complete the factorization. x^2 + 3x - 28 = (x+7)( ?)?

2006-12-19 13:16:01 · 6 answers · asked by styles4u 4 in Mathematics

0 ⤊

Important Chemistry Questions 2?

1) Whats the halflife of an isotope if 12 grams of a 500 gram sample of the isotope if 125 grams of a 500 gram sample of the istope remains after 3 yrs?

a)1.5 years b)2.5 years C)3.5 Years d) 4.5 years

2) In the reaction represented by the equation Na+Br=NaBr, which species is reduced?

a)Na b)Br c)both a and b d) neither a or b

3) Predict the product of the reaction represented by MgO +CO2 =

a)MgCO3 b)Mg+ CO3 c) MgC+ O3 d)Mg(O2+o)

Thank you very much.

2006-12-19 13:14:08 · 2 answers · asked by Anonymous in Chemistry

8 ⤊

does anyone know of a websie where you can learn more about geography that is online please answer soon thanks

I am going o take a test to see if I may be in the state geo bee and i need to find a website where i may polish up my skills anyone who nows one please post it I will choose my best choice by the one that taught me the most information and I think could br more useful in he future Thanks,
Eraser_head00@yahoo.com

2006-12-19 13:14:00 · 6 answers · asked by eraser_head00 1 in Geography

0 ⤊

How and where did the mathematicians and philosophers before, get the equations and formulas in math?

Everytime I attend my math class, i get awestruck at the equations and formulas that my teacher shows and explains to us. I was just wondering how the mathematicians and philosophers came up with these equations and formulas that are connected to each other. How long and how did they do it???

2006-12-19 13:13:57 · 5 answers · asked by Miah 1 in Mathematics

2 ⤊

Factor the polynomial. 47^2 - 81?

2006-12-19 13:11:58 · 8 answers · asked by styles4u 4 in Mathematics

0 ⤊

common natural disasters in ohio?

2006-12-19 13:11:52 · 7 answers · asked by sid182 1 in Geography

1 ⤊

(cot x + tan x) / csc ^ 2 x =?

2006-12-19 13:09:59 · 4 answers · asked by DadinTrouble 1 in Mathematics

0 ⤊

Find the prime-factored form of the number: 42?

2006-12-19 13:07:42 · 3 answers · asked by styles4u 4 in Mathematics

0 ⤊

what do you use to measure sound?

2006-12-19 13:07:22 · 6 answers · asked by james s 2 in Engineering

0 ⤊

Does anyone know what the projected cost would be for the first passenger trip into space?

Assuming competion would bring the cost down, how large of an industry would have to exist and how long would it take to make space travel (assuming orbit) affording by say: the upper middle and upper economic classes? Can anyone point to some web sites of whom the leading companies that might provide such a service?

2006-12-19 13:05:07 · 2 answers · asked by Westbound 4 in Astronomy & Space

0 ⤊

Can an organism live without cell(s)?

2006-12-19 13:02:07 · 8 answers · asked by Anonymous in Biology

4 ⤊

Weird dream?

I had the strangest dream!!!
I dreamt that this guy that's in a few of my classes asked me out ( I don't have a crush on him) I said no,, because he wasn't my type. In this dream he phoned his friend and said some pretty harsh things about me(think female dog) In this dream later, i remember deciding to go out with him, i don't know why. Does anyone know what this dream means????It's weirding me out!!!

2006-12-19 13:00:20 · 12 answers · asked by tammie m 1 in Astronomy & Space

0 ⤊

(sin(x) * cos (x))/(1-cos^2 (x))?

Please solve (sin(x) * cos (x))/(1-cos^2 (x)) (x is not raised to the power)

2006-12-19 12:59:15 · 9 answers · asked by DadinTrouble 1 in Mathematics

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