Mathematics - 26 October 2007

2007-10-26 04:56:32 · 7 answers · asked by Anonymous

A regular hexagon has sides of length 12 cm. If the length of the apothem is 6�ã 3 cm, what is the area of the polygon?

2007-10-26 04:48:17 · 2 answers · asked by Anonymous

2007-10-26 04:29:54 · 4 answers · asked by Pascal 4

2007-10-26 04:22:01 · 10 answers · asked by josh.isaiah 2

a. 2 ^–1 + 4^ –1
b. ( 2/5 )^ -3

Can someone please explain?

2007-10-26 04:19:08 · 8 answers · asked by Anonymous

An algebraic word problem.
I need a little help.
I'm not that great at it.
Help me!!!

2007-10-26 04:08:46 · 12 answers · asked by max 1

help!

2007-10-26 03:55:00 · 2 answers · asked by malteaser 2

2007-10-26 03:29:53 · 1 answers · asked by Ciavana 3

Solve the following equations in terms of pi in the interval [0,2pi].

2007-10-26 03:25:49 · 2 answers · asked by Ciavana 3

A belt connects a pulley of radius 8 centimeters to a pulley of radius 6 centimeters. Each point on the belt is traveling at 24 centimeters per second. Find the angular velocity of each pulley.

picture available here http://i240.photobucket.com/albums/ff163/aari07/num3.jpg

2007-10-26 03:25:41 · 1 answers · asked by Princess 2

gary can hike on level ground 3 miles an hour faster than he can on uphill terrain. Yesterday, he hiked 34 miles, spending 2 hrs. on level ground and 5 hrs. on uphill terrain. find his average speed on level ground.

2007-10-26 03:24:14 · 2 answers · asked by amy f 1

1. An object is projected upward from the top of a tower. Its distance in feet above the ground after t seconds is given by s(t)=-16t^2+64t+80. How many seconds will it take to reach ground level?
a. 1 second
b. 4 seconds
c. 5 seconds
d. 8 seconds

2. From a square piece of cardboard with width x inches, a square of width x - 3 inches is removed from the center. Write the area of the remaining piece as a function of x.
a. f(x) = 6x - 9
b. f(x) = 6x + 9
c. f(x) = 2x^2 - 9
d. f(x) = 2x^2 - 6x – 9

3. If P(4, -5) is a point on the graph of the function y = f(x), find the corresponding point on the graph of y = 2f(x - 6).
a) A(1, 8)
b) B(2, -5)
c) C(6, 8)
d) D(10,-10)

4. Find all roots of the polynomial x^3 - x^2 + 16x - 16.
a. 1, 4, -4
b. -1, 4, -4
c. -1, 4i, -4i
d. 1, 4i, -4i

5. Find a polynomial with leading coefficient 1 and degree 3 that has -1, 1, and 3 as roots.
a. x^3 - 3x^2 - x + 3
b. x^3 - 3x^2 + x - 3
c. x^3 + 3x^2 - x - 3
d. x^3 + 3x^2 + x + 3

2007-10-26 03:11:32 · 1 answers · asked by jane 1

According to Boyle's Law, when a sample of gas is compressed at a constant temperature, the pressure and volumn satisfy the equation P V = C, where C is a constant. Assume that, at a certain instant, a sample has a volume of 950 cm3, is a pressure of 120 kPa, and the pressure is increasing at a rate of 19 kPa/min. At what rate is the volume decreasing at this instant?

2007-10-26 02:52:52 · 3 answers · asked by Rachel 1

2007-10-26 02:51:17 · 2 answers · asked by Ciavana 3

A farmer has 400 yards of fencing to enclose a rectangular garden. Express the area A of the rectangle as a function of the width X of the rectangle. What is the domain of A?

2007-10-26 02:50:56 · 5 answers · asked by etienne b 1

let matrix A=[ 1 1 ; 4 1]. (A 2x2 matrix with (1 1) in first row and (4 1) in the 2nd).
Diagonalize A by finding P and D such that A=PDP^-1.

Hence compute A^50.

Is it true that A^-1=(P)(D^-1)(P^-1)

please try to send me the final answers as well as the workings... thanks :)

2007-10-26 02:47:29 · 2 answers · asked by sh 1

2007-10-26 02:40:33 · 4 answers · asked by zaidi 1

2007-10-26 02:33:15 · 15 answers · asked by Calchas 3

Hi all,

I'm given a set of multidimensional polar coordinates: (R,Theta_1,....Theta_n-1)

I need to know how to convert it to cartesian coordinates:
(X_1,X_2,...,X_n)

Thanks!

2007-10-26 02:27:45 · 1 answers · asked by rcf1105 2

rich and poor,young or old everyone needs numbers.mathematices,the queen of science,in its practical application is a part and parcel of our lif.mathematics also help in to devolop their aptitude,imaginaton and logical reasoning.often children study maths just to scour marks and pass in the examintion without enjoying the subject.to do away with this unhealthy practice we should present mathematice in an attractive and interesting way.this contents would benefit childrens as will as elders.

2007-10-26 02:17:05 · 10 answers · asked by Anonymous

Solve for the unknown parts and find its area
a= 23 b=43 c=31
(Find the three angles and the area)

2007-10-26 01:48:08 · 4 answers · asked by delixir_21 1

A flagpole is situated at the top of a building 120 ft tall from a point in the same horizontal plane as the base of the building, the angles of elevation of the top and bottom of the flagpole are 73.2 degrees and 67.2 degrees. Respectively how tall is the flagpole?

2007-10-26 01:40:05 · 5 answers · asked by delixir_21 1

On a hill, inclined at 15.4 degrees with the horizontal, stands a vertical tower. At a point Q, 61.5 inches down the hill from the foot of the tower, the angle of elevation of the top of the tower is 42.6 degrees. How tall is the tower?

2007-10-26 01:37:24 · 2 answers · asked by delixir_21 1

f is continuous on [0,4] and differentiable on (0,4). Also, suppose f(0) =1
and 3 a. 13 b. 3 c. 12 d. undefined

2007-10-26 01:25:34 · 2 answers · asked by programhelp 2

2007-10-26 01:21:36 · 8 answers · asked by erkbergles 3

2007-10-26 01:11:50 · 6 answers · asked by Anonymous

1. ( 2 x^5 / 3 x^3 ) ?

2007-10-26 01:10:24 · 4 answers · asked by dana c 1

4x^[2]y'' + 8xy' + y = 0, x > 0.

(a) Show {x^(-1/2), x^(-1/2)lnx} is a fundamental solution set for the differential equation.
(b) Solve the initial value problem with y(1) = 1, y'(1) = 0

2007-10-26 00:23:46 · 3 answers · asked by Anonymous

let matrix A=[ 1 1 ; 4 1]. (A 2x2 matrix with (1 1) in first row and (4 1) in the 2nd).
Diagonalize A by finding P and D such that A=PDP^-1.

Hence compute A^50.

Is it true that A^-1=(P)(D^-1)(P^-1)

please try to send me the final answers as well as the workings... thanks :)

2007-10-26 00:12:07 · 1 answers · asked by sh 1