Mathematics - 9 December 2007

Earthquake intensity is measured by the Richter scale. The formula for the Richter rating of a given quake is given by "R=log[I/I0]" where I0 is the "threshold quake", or movement that can barely be detected, and the intensity I is given in terms of multiples of the threshold intensity.

An earthquake was reported to have a Richter number of 5.99. How does the intensity of the earthquake approximately compare with the reference intensity?


I need to know how to solve this for a test tomorrow. First correct answer which explains how to do it gets best answer - I thought the answer was 0.77 but I was wrong.

2007-12-09 14:38:49 · 3 answers · asked by Jaz 'ma' Taz 2

2007-12-09 14:22:05 · 3 answers · asked by jetengine767 3

On a map with a scale of 1:100 000 000, what distance, in centimetres, represents an actual distance of 2500 km?

2007-12-09 14:21:41 · 8 answers · asked by Joanne M 1

2007-12-09 14:19:11 · 5 answers · asked by malorie e 1

2007-12-09 14:16:51 · 7 answers · asked by ````andui```` 1

What is the ones digit when 6317^458 is written in standard form?
Any help greatly appreciated!

2007-12-09 14:15:28 · 8 answers · asked by Anonymous

l-20l+3+l-4l-l-5l+12

2007-12-09 14:15:06 · 1 answers · asked by ? 2

integral from -inf to inf of (x*sin(x)) / ((x^4)+1) dx

2007-12-09 14:09:30 · 1 answers · asked by something crazy 4

Trick question i have no idea

2007-12-09 14:04:33 · 14 answers · asked by Steffi loves Bob!!! 1

Water, in its liquid state has a density of 0.9971 grams per cubic centimeter. Ice has a density of 0.9168 grams per cubic meter. you fill a cubical container with 510 grams of liquid water. a different cubical container with 510 grams of solid water(ice).

1. what is the volume of the container filled with liquid water
2. what is the length of the edges in #1
3. what is the volume of the container filled with ice.
4. what is the length of the edges in #3

other questions.

find the length of the edge of the cube, volume=216^3
find the length of the edge of the cube, volume=527^3

thanks .
please tell me how u did it (:

2007-12-09 14:00:01 · 1 answers · asked by so so fresh 2

And explain how to graph it

2007-12-09 13:47:01 · 1 answers · asked by Anonymous

2007-12-09 13:44:55 · 1 answers · asked by ? 2

In a hotel bathroom, the tiles on the floor are 4" squares. There are similar tiles on the wall. The door opens into the bathroom with the hinge on the right side of the door frame. The door frame extends 2" from the adjacent wall (or in other words, the door hinge is 2" from the corner). The center of a rubber bumper on the end of a 1/2" long door stop contacts the adjacent wall 1" from the end of the fourth tile from the corner. Directly opposite the rubber bumper is the screw for attaching the door stop to the door.



How far from the hinge is the center of the screw hole for the rubber bumper? State you answer to the nearest 1/16th of an inch.

2007-12-09 13:22:13 · 1 answers · asked by sharifalkulike_22 1

How could you arrange 12 toothpicks to make six identical squares.

2007-12-09 13:18:59 · 3 answers · asked by Anonymous

Given
[f(a+h)-f(a-h)]/h=f'(a+ch)+f'(a-ch)
where f is differentiable on the reals, a is in the reals and h>0
How could you show that there's a c in (0,1) such that the above is true?

2007-12-09 13:18:58 · 1 answers · asked by Lucy J 2

Explain or identify the symmetry of the points (x1,y1) and (x2,y2)
Explain me a conjeture about any relationship between sin(t1) and cos(t1+pi)
Explain me a conjeture about any relationship between cos(t1) and cos(t1+pi).
please if anybody can do this, i cant understand it.

2007-12-09 13:13:10 · 1 answers · asked by Anonymous

2007-12-09 12:59:37 · 9 answers · asked by Anonymous

A rain gutter is made from sheets of aluminum that are 24 in wide. The edges are turned up to form right angles. Determine the depth of the gutter that will allow a cross-sectional area of 52 sq in.

2007-12-09 12:53:44 · 2 answers · asked by Boonay444 2

Can someone list all the properties of math? And also give me a brief explanation? THANKS.

2007-12-09 12:53:29 · 2 answers · asked by Anonymous

find the cubic polynomial p(x) such that p(1) + p(2) + ... + p(n) = n^4

2007-12-09 12:50:59 · 1 answers · asked by Anonymous

Pleas answer! ;)

2007-12-09 12:42:50 · 4 answers · asked by rachel 1

2007-12-09 12:35:37 · 3 answers · asked by Anonymous

X 2 2 3 5
Y 2 4 4 6

2007-12-09 12:30:37 · 3 answers · asked by Jake 1

can someone please show how this is done

2007-12-09 12:29:42 · 3 answers · asked by Anonymous

He will lose $25 if he does not. What is the man's mathematical expectation? Is this game fair?

2007-12-09 12:12:10 · 3 answers · asked by Charles L 1

Suppose players A, B,C play a game. Each writes an integer from 1 to 10. If A writes i, and B writes j, and C writes k, the payoffs to each player are the following:
A's payoff is |i - j|
B's payoff is |j - k|
C's payoff is |k - i|

Find the Nash equilibrium.

I am really having trouble with three person games, so any help on how to find it would be greatly appreciated.

2007-12-09 12:06:03 · 1 answers · asked by st0rmy111 1

1. The length of a rectangle is 8 cm greater than its width. Find the dimensions of the rectangle if its area is 105 cm (squared)

1. The length of a rectangle is 6 cm less than twice its width. Find the dimensions of the rectangle if its area is 108 cm (squared)

Please try to explain to me the best way you could ! It's urgent !

2007-12-09 12:02:18 · 8 answers · asked by mathe freak 1

im really dumb and need help with my homework much apprichiated

2007-12-09 11:38:30 · 1 answers · asked by Anonymous

2007-12-09 11:11:08 · 3 answers · asked by phyllislltt 1

Math: A new car dealership sells cars and trucks in a ratio of 7 to 5. Last month, the dealership sold 84 cars and trucks. how many cars and how many trucks were sold? please try to show me work

2007-12-09 11:07:18 · 5 answers · asked by Anonymous