Mathematics - 19 August 2007

will you please tell me

2007-08-19 14:38:35 · 5 answers · asked by Mike S 2

2007-08-19 14:27:41 · 8 answers · asked by Judy M 1

13^4 / √(13^10)

Do you simplify it like this:

13^4 / √(13^10)
13^4 / 13^5 (after √(13^10) = (13^10)^(1/2) = 13^5)
1/13

Or like this?:

13^4 / √(13^10)
(13^4)^2 / (√(13^10))^2 (square the numerator and denom.)
13^8 / 13^10
1/(13^2)
1/169

Which is correct?

2007-08-19 14:16:47 · 6 answers · asked by Jae 3

f(x) = [(e^x)+(e^-x)] / 2

2007-08-19 14:07:23 · 4 answers · asked by pandaeater9 2

520 fishes were caught and tagged. On a recent survey, 30 out of 125 fishes had been tagged. Estimate the size of the seal population.

I tried doing this but I didnt know what to put in the failure class and the failure. I m kinnda confused. Can someone plz. help?

Thanks

2007-08-19 13:54:18 · 2 answers · asked by cool :-D 1

If someone could please help with this problem that would be great.

The unhealed area, A, of certain skin wound after t days is modelled by the formula
A = 100(10)^-0.2t where A is measured in cm^2

(i) What area, to the nearest cm^2, will be left unhealed after 2 days?

(ii) After how many days will the wound be 70% healed?

2007-08-19 13:51:32 · 2 answers · asked by Anonymous

I need to do this without a calculator. I've tried addition/subtraction on the unit circle to get 17pi/5, but none of the combinations give me clean numbers to work with.

Also, cos^-1 if arc cosine, I believe (if you're unfamiliar with those signs).

2007-08-19 13:43:22 · 7 answers · asked by bubblebobboy 1

First off x has to be a real number, here is the first problem:

27^2x = 9^x-3

The other problem is:

log x + log (x - 3) = 1

I don't need the answers to these problems, I just really need help starting these problems. Thank You.

2007-08-19 13:41:37 · 2 answers · asked by Dan 3

2007-08-19 13:30:22 · 3 answers · asked by Anonymous

True or False:
A bisector of a segment always intersects that segment at its midpoint.

2007-08-19 13:28:05 · 2 answers · asked by Anonymous

Does the length of a segment refers to the distance between its two endpoints?

2007-08-19 13:25:23 · 2 answers · asked by Anonymous

A manufacturer purchases a part for use at both of its plants-one at Roseville, CA, the other at Akron, OH. The part is available in limited quantities from two suppliers. Each supplier has 75 units available. The Roseville plant needs 35 units, and the Akron plant requires 75 units. The first supplier charges $70 per unit delivered to Roseville and $90 per unit delivered to Akron. Corresponding costs from the second supplier are $80 and $120. The manufacturer wants to order a total of 75 units from the first, less expensive, supplier, with the remaining 35 units to come from the second supplier. If the company spends $9750 to purchase the required number of units for the two plants, find the number of units that should be purchased from each supplier for each plant.

P.S. please show the matrixes needed to setup and solve this problem.

2007-08-19 13:15:21 · 1 answers · asked by Adawg 3

2007-08-19 13:14:50 · 5 answers · asked by Will 4

2007-08-19 13:01:05 · 5 answers · asked by Anonymous

using a standard deck of cards how many 5-card hands are possible that have 3 aces and 2 kings??.....i used combinatorics and i got 24.....is it right? if not how do u get the right answer...

2007-08-19 12:56:35 · 4 answers · asked by funkenstien 2

thank you so much if you actually answer this question. and i don't need the whole answer, just like an idea of how to solve it

2007-08-19 12:49:38 · 7 answers · asked by whaddyaknow? 4

Is it Stephen Hawkins?

2007-08-19 12:45:30 · 9 answers · asked by kim z 1

Write an equation in slope-intercept form that satisfies each given condition:

9. slope = -5, passes through (-3, -8)

How would I go about solving this problem?

2007-08-19 12:45:24 · 5 answers · asked by Anonymous

I need to obtain a single fraction, here is the expression:

[1 / (x + h)] - 1/x

I dont need the answer, but how to start this problem. Thank You.

2007-08-19 12:41:52 · 7 answers · asked by Dan 3

The current of the Wabash River runs 2 miles per hour. It took Marcia and Marion 45 min to paddle a certain distance upstream and 30 min to paddle back with the current. What was their rate of paddling in still water?

2007-08-19 12:38:37 · 4 answers · asked by Anonymous

Someone please solve this for me:
2(x+3)-5(2x+1)
and explain how you solved it.

Thank you!

2007-08-19 12:38:16 · 8 answers · asked by Anonymous

I'm having trouble with one problem for my math homework because all it says on my paper is:
which number property gurantees that this equation is true for any number n?
5n=n5
pls answer i really need the help =)

2007-08-19 12:23:46 · 8 answers · asked by amanda 1

What's the difference between the global Cauchy's theorem and local Cauchy's theorem?

2007-08-19 12:19:13 · 3 answers · asked by olhenry56 2

I don't understand why i^-3 wouldn't be 1/i^3
or 1/-i...can someone explain this to me?

2007-08-19 12:16:50 · 5 answers · asked by Rachael A 2

A cube-shaped box is 6 inches wide and the rectangular box is 10 inches long, 4 inches wide, and 4 inches high. How much greater is the volume of the cube-shaped box than the rectangular box?

2007-08-19 12:00:43 · 5 answers · asked by Jeff M 1

A manufacturer purchases a part for use at both of its plants-one at Roseville, CA, the other at Akron, OH. The part is available in limited quantities from two suppliers. Each supplier has 75 units available. The Roseville plant needs 35 units, and the Akron plant requires 75 units. The first supplier charges $70 per unit delivered to Roseville and $90 per unit delivered to Akron. Corresponding costs from the second supplier are $80 and $120. The manufacturer wants to order a total of 75 units from the first, less expensive, supplier, with the remaining 35 units to come from the second supplier. If the company spends $9750 to purchase the required number of units for the two plants, find the number of units that should be purchased from each supplier for each plant.

P.S. please show the necesarry setup needed to solve this problem.

2007-08-19 12:00:13 · 3 answers · asked by Adawg 3

Does a ray always, sometimes, or never have a finite length?

2007-08-19 11:59:02 · 4 answers · asked by Anonymous

The line y = 0.15x + 0.79 represents an estimate of the average cost of gasoline for each year. The line 0.11x - y = -0.85 estimate the price of gasoline in January of each year

a) Do you expect the lines to be intersecting, parallel, or perpendicular? Explain your reasoning.

b) Use the equations of the lines to determine if they are parallel. What did you find?

c) Did your answer to part b confirm your expectation in part a?

2007-08-19 11:57:42 · 3 answers · asked by Anonymous

2007-08-19 11:57:01 · 5 answers · asked by Cass 1

2007-08-19 11:54:36 · 5 answers · asked by Jeff M 1