Science & Mathematics - 14 February 2007

Evolution and Antibiotic Resistance: Survey
----1. Have you taken any antibiotics in the past year? Why were antibiotics prescribed for you? did you or your doctor know that you had a bacterial infection?

----2. Did you take the medication at the dosages and intervals prescribed and take it for the entire recommended course of treatment? if not, why not?

----3. do you know why it is important to finish all prescriptions, even if your symptoms have cleared up?

---- 4. Do you think antibiotics are overprescribed by doctors? Explain.


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2007-02-14 15:32:53 · 17 answers · asked by the common cold 4 in Medicine

I've been reading over some review and come across these problems and I'm not sure how to go about the wording.. I was hoping some of you on here had experience with it.

1. For each real number x, x^2 ≥ x.
2. Any even integer is a multiple of 4.
3. There is a real value of x such that x^2 < 2x − 1.

Thanks.

2007-02-14 15:32:40 · 4 answers · asked by Chris 1 in Mathematics

1) Let α= (1234) and β= (24) ε S4

a) Find |α| and |β|

b) Find H= < α , β>

c) Find |H|


2) Show that (Q, +) is not finitely generated.

3) Let G denote a group such that |G| < 200. Suppose G has subgroups of order 25 and 35. Find the order of G.

4) Give an example of a noncommutative group in which every
subgroup is normal

5) Let G denote a group. Let H < G be a subgroup of G such that H Z(G). Show that if G/H is cyclic then G=Z(G), i.e., G is commutative

2007-02-14 15:32:09 · 1 answers · asked by Scottie 1 in Mathematics

they sprout at the end of germination and they are needed to start photosynthesis, since the seed was running on cellular respiration beforehand....what are they called?

2007-02-14 15:31:48 · 8 answers · asked by Anonymous in Botany

why did it fall through itself, instead of falling over? Even if the beams were soft they would still offer some resistance, wouldn't they. I just can't understand how all the support columns could melt at exactly the same time.

2007-02-14 15:31:08 · 9 answers · asked by Anonymous in Other - Science

rational number

2007-02-14 15:29:37 · 5 answers · asked by kondiii 1 in Mathematics

Aqueous ammonia reacts with Fe(III) ions to produce red-brown Fe(OH)3:

Fe3+(aq) + 3NH3(aq) + 3H2O(l) <==> Fe(OH)3(s) + 3NH4+(aq)

2007-02-14 15:28:04 · 2 answers · asked by Alan l 1 in Chemistry

how can you tell if a reaction is oxidation-reduction, acid-base, precipitation, or dehydration?

2007-02-14 15:27:16 · 2 answers · asked by Luciya 2 in Chemistry

What is it?

Just wondering..... ♥

2007-02-14 15:26:08 · 2 answers · asked by Susie 6 in Biology

2007-02-14 15:24:35 · 2 answers · asked by kondiii 1 in Mathematics

2007-02-14 15:24:05 · 12 answers · asked by Anonymous in Geography

Ok, this is for a website I'm working on, but I'm going to abstract the real problem in order to explain it more clearly:

Say I own a parking lot in a busy downtown area. You agree to rent a parking space from me for $100/day. However, as soon as you park your car, the value of that space begins to decline logarithmically. Precisely 24 hours later, it's value is reduced to $0.00. When I say "logarithmically" I mean that the value of the parking space might decline by $0.02 during the first 10 minutes, but during the final 10 minutes of the day, it may decline by $5.00.

How do I calculate the value of the parking space at any given instant during the day?

2007-02-14 15:20:00 · 1 answers · asked by pinkfloyd_guy 1 in Mathematics

2007-02-14 15:18:47 · 5 answers · asked by kat 1 in Mathematics

A parachutist in free fall travels a vertical distance x from her starting point in a time t. If the effect of air resistance is neglected, the relationship between x and t is approximately

x=5t^2

Use a limiting process to calculate the gradient of curve x = 5t^2 when t=2.

What does the value you have found for the gradient tell you about the vertical velocity of the parachustist at t=2

2007-02-14 15:18:31 · 2 answers · asked by Roger M 2 in Mathematics

2007-02-14 15:18:19 · 9 answers · asked by blahblahblah 5 in Biology

2007-02-14 15:18:00 · 4 answers · asked by Tem 1 in Biology

2007-02-14 15:16:23 · 10 answers · asked by stephen 1 in Physics

Please explain every step.

2007-02-14 15:16:12 · 7 answers · asked by HIGH low 2 in Mathematics

Im writing a paper and I must explain how rubber bands work, and I dont understand, or know how to put it in a way that can make sense.

2007-02-14 15:15:39 · 4 answers · asked by Anonymous in Chemistry

Please explain every step.

2007-02-14 15:14:42 · 5 answers · asked by HIGH low 2 in Mathematics

An ammeter whose internal resistance is 65 reads 5.25 mA when connected in a circuit containing a battery and two resistors in series whose values are 640 and 440 . What is the actual current when the ammeter is absent?
answer should be in mA

2007-02-14 15:13:43 · 7 answers · asked by ZG786 1 in Physics

A certain code is a sequence of five digits. What is the probability of generating five digits and getting the code 12345 if each digit can be repeated?

2007-02-14 15:13:14 · 4 answers · asked by Caroline 1 in Mathematics

I know you substitute k-1 for x but I can't figure out the answer...

2007-02-14 15:11:25 · 6 answers · asked by Jerse 3 in Mathematics

jerry built a rectangualr prism out of a base-10 blocks. first he used 25 cm cubes to make up the base. he put 3 more layers of cubes on top of the first layer of cubes.

2007-02-14 15:09:18 · 2 answers · asked by Anonymous in Mathematics

HELP PLEASE!!
URGENT!!!!!!!!!!

it has something to do with the s and p waves right?

2007-02-14 15:08:40 · 8 answers · asked by sheep_closet 1 in Earth Sciences & Geology

2007-02-14 15:08:30 · 1 answers · asked by Caroline 1 in Mathematics

x 0 1 2
P(x) 0.60 0.30 0.10

Please include the calculations involved and formulas, if any

2007-02-14 15:08:12 · 2 answers · asked by Anonymous in Mathematics

A baseball pitcher throws a baseball with a speed of 46m/s. In throwing the baseball, the pitcher accelerates the ball through a displacement of about d=3.4m, from behind the body to the point where it is released.

2007-02-14 15:07:11 · 3 answers · asked by Vanita L 1 in Physics

1. Simplify –3x3 + (3x)3.

12x3
24x3
0
6x3
2. Simplify (j5)6.

j30
j11
j
j15,625
3. Simplify (2.5 × 104)–3. Write the answer in scientific notation.

6.4 × 10–12
6.4 × 10–14
0.064 × 10–12
0.064 × 10–14
4. Simplify (5 × 10–8)2. Write the answer in scientific notation.

25 × 10–15
2.5 × 10–15
2.5 × 10–16
25 × 10–16
5. Simplify (2cd2)3(cd)6.

2c9d12
2c4d12
8c9d12
8c9d8

2007-02-14 15:06:24 · 5 answers · asked by Ryry 2 in Mathematics

2007-02-14 15:06:11 · 3 answers · asked by ric_goh62 1 in Engineering