Mathematics - 13 September 2007

1. Given the function v(t) is

(1/2)t when t is greater than zero and less than or equal to four

2 when t is greater than four and less than or equal to six

-t+8 when t is greater than six and less than or equal to eleven

3t-36 when t is greater than eleven and less than or equal to twelve

Find the distance function f(t) that corresponds to v(t).




2. Let f(x) = (2x + 3)^(1/2). Simplify
(f(x + h) - f(x))/h
and evaluate your simplified answer when h = 0.





3. Find (using any method you can think of) cos(x) = x.




Can you give me an answer and maybe an explanation. Thanks so much.

2007-09-13 11:22:41 · 1 answers · asked by Need Help 1

alright- its not that crazy, just a little unusual to me and I can't quite figure it out.

y= 4 - 2x - x^2

Thanks!

2007-09-13 11:17:48 · 3 answers · asked by Sarah 2

2007-09-13 11:13:21 · 2 answers · asked by scrocks3 2

2007-09-13 10:59:49 · 10 answers · asked by Anonymous

is positive? Is the 0 taken into consideration rendering not all numbers positive or its only use is for the distance between?
thanks , and thanks Dan-ye from other question

2007-09-13 10:43:46 · 5 answers · asked by parev 1

Such as 2x + 5y=1 -x+6y=8

2007-09-13 10:43:07 · 3 answers · asked by Anonymous

Hey I am in Calculus right now and my teacher gave us this packet with questions from previous Ap exams.

1980 AB3

Let f(x)=ln(x^2) for x>0 and g(x)=e^(2x) for x>(or equal to)0. Let H be the composition of f with g, that is, H(x) = f(g(x)), and let K be the composition of g with f, that is K(x)=g(f(x)).

(a) Find the domain of H and write an expression for H(x) that does not contain the exponential function.

(b) Find the domain of K and write an expression for K(x) that does not contain the exponential function.

(c) Find an expression for f^-1(x), where f^-1 denotes the inverse function of f, and find the domain of f^-1.

I would really appreciate your help. I need answers by tonight, thanks.

-Also I need to show work so if you can show how you got it I would appreciate it, but if you know the answer, or just one of the answers, I will accept that aswell, thanks.

2007-09-13 10:41:48 · 4 answers · asked by zach q 1

What does x+2+2x=x+10=

When You Get The Answer sHOW yOUR wORK bECAUSE i Don Remeber How to explain it

thank u

2007-09-13 10:40:23 · 5 answers · asked by Anonymous

this is for speed and accelerration calculations and i am not good in math and really need help and thanks too all who respond

2007-09-13 10:37:39 · 3 answers · asked by pinchback_12 1

2007-09-13 10:35:13 · 5 answers · asked by Anonymous

Lets say you're naming segments that are the same, would you write that their equal or congruent?

Lets say you're naming angles that are the same, would you write that their equal or congruent?

Lets say you're naming lines that are the same, would you write that their equal or congruent?

is there any way of knowing which one it is?

Thanks :)

2007-09-13 10:31:51 · 3 answers · asked by luckyplaya23 2

We are preparing for a major competition and came across with cos 2 and cos 2^0. What is the difference in the graph of the two? Even if we write as cos 2x and cos 2^0x, we still can't see the difference between the two.


This question really got me confused and I don't think it has got to do with the double angle.

Thanks in advance.....

2007-09-13 10:28:38 · 1 answers · asked by rochelle 2

Anyone know anything about factoring trinomials?

Okay factor completely??

1) 36 x^2 + 60 +9

2) 24x^2 - 46x + 10

2007-09-13 10:26:00 · 4 answers · asked by Anonymous

Something such as -4 x (-3) = 12 and 4 x 3 = 12, why do the negatives cancel out?

2007-09-13 10:19:21 · 6 answers · asked by blue.rose7 2

two planes left an airport at noon. one flew east at a certain speed and the other flew west at twice the speed. the planes were 2700 miles apart in 3 hours. how fast was each plane flying?

lol i no ive learned this b4 but i just cant rmbr wat to do, can u help?

2007-09-13 10:14:42 · 7 answers · asked by ♫ɱƱ§ΐɔ ƜɑʞƐƨ ƮɧƏ ʍΘɽɩɖ ɢΏ ƦȯʋɲƉ♫ 3

What does that mean? Does that mean that we're to plug in something from the left and then something from the right to get two values or is there some complex way to do it that my teacher decided not to share with us? The problems I'm asking about specifically are:
find the derivatives from the left and form the right at x=1 (if they exist). Is the funcion differentiable at x=1?
53. f(x) = abs(x-1)
55. f(x) = (x-1)^3, x less than or equal to 1
(x-1)^2, x > 1

thanks for the help

2007-09-13 10:12:14 · 2 answers · asked by Chelsea 5

Hey I am in Calculus right now and my teacher gave us this packet with questions from previous Ap exams.

1975 ABI

Given the function f defined by f(x)=ln(x^2-9)

(a) Descibe the symmetry of the graph of f.

(b) Find the domain of f.

(c) Find all values of x such that f(x)=0

(d) Write a formula for f^-1(x), the inverse function of f, for x>3.

I would really appreciate your help. I need answers by tonight, thanks.

-Also I need to show work so if you can show how you got it I would appreciate it, but if you know the answer I will accept that aswell, thanks.

2007-09-13 10:09:21 · 2 answers · asked by zach q 1

evaluate each algebraic expression.

2007-09-13 10:09:06 · 3 answers · asked by Eman K 1

What is the point of intersection of the Line and Plane?

2007-09-13 10:02:21 · 1 answers · asked by Anonymous

huh???

2007-09-13 09:56:36 · 7 answers · asked by meee 2

length of the curve from x=1 to x=3, y= ((x^3)/3) + (x/4)

I get to a point where I have to take the integral of a square root, but the inside function does not have the derivative in the integral so I am stuck and can't go any further.

2007-09-13 09:51:36 · 3 answers · asked by Anonymous

5/12 and 3/20

2007-09-13 09:41:02 · 4 answers · asked by baby166_99 2

help me pls...im confused!!!

2007-09-13 09:40:26 · 6 answers · asked by meee 2

(x1, y1) and (x2, y2).

b) Find a parametrization for the line segment with endpoints (x1, y1) and (x2, y2)

2007-09-13 09:39:50 · 2 answers · asked by hello 1

4x(2x – 1) + 5x(3x + 1)

2007-09-13 09:37:27 · 4 answers · asked by baby166_99 2

2007-09-13 09:31:40 · 3 answers · asked by Jeffrey J 1

2007-09-13 09:29:32 · 12 answers · asked by baby166_99 2

HELP!!! how do i solve it???

2007-09-13 09:28:15 · 12 answers · asked by meee 2

1. I'm looking for the density. I was given the equation Density=Mass/Volume. The mass is 4.65 x 10^6 g. The volume is 5.374 x 10^-3 mL. Would the answer be 0.865 x 10^9 g/mL?

2. Given that the volume is 13.6 x 10^4 mL, and the density is 6.8 x 10^4 g, what is the mass? So the equation would be M=VD, right? My answer was 92 x 10^8 g^2. Is that correct?

3. I had to find the volume. I'm not sure if this is right, but I changed the equation to V=M/D. The given mass was 6.2 x 10^6 and the given density was 12.4 x 10^-6. I got the answer 0.5 x 10^36, which I think may be wrong in multiple different ways.

Thank you!

2007-09-13 09:19:43 · 4 answers · asked by Me 7

How do you do this?:
6-x
----- < 2
4+x

2007-09-13 09:08:36 · 2 answers · asked by Michael Skarn 3