Science & Mathematics - 5 December 2007

i think its simple enough, but im not quite sure.

If two parents with dominant phenotypes produce an offspring with a recessive phenotype, then
(a) both parents are heterozygous
(b) one parent is heterozygous
(c) both parents are homozygous
(d) one parent is homozygous

im guessing its either A or B, along with answering the question, umm can anyone give me detail on wat they mean by both parents with dominant phenotype? may i have an example?

2007-12-05 17:42:58 · 9 answers · asked by Anonymous in Biology

ok help me out plz ...
1.P and Q working together an do a job 4 days, Q and R can do the same job in 3 days, P and R in 2.4 days. How long will they take to finish job independently.

2. 5 tables and 8 chairs costRs.11500, 3 tables and 5 chairs cost Rs.7000. What is the cost of chair and table.

3.If 1 pump an fill a pool in 16 hrs and if 2 pumps can fill the pool in 6 hrs, how fast can 2 pump fill the pool

4. If 8 men take 12 days to assemble 16 machines how many days will it take 15 men to assemble 50 machines

2007-12-05 17:42:42 · 1 answers · asked by Chainz chIzzEl 1 in Mathematics

Read these first:
the subject is in their preferred kind of bed (right firmness of pillow, mattress)

the atmosphere is quiet and dark with no light sources or sounds that can awaken people

the subject is wearing comfortable clothes, has adequate covering and is not too hot or cold.


if you put these together, is it possible for that person to keep sleeping and never really wake up?

2007-12-05 17:42:26 · 9 answers · asked by whatevbookwrm687 4 in Other - Science

Sumnation of (1+1/n)^2*e^-n where n=1 to infinite

2007-12-05 17:41:19 · 3 answers · asked by Anonymous in Mathematics

I don't understand how to do this...

What mass of glucose can be produced from a photosynthesis reaction that occurs using 10 mol
(( <sub>means subscript ))
CO2

6CO2(g)+6H2O(l) ---> C6H12O6 (aq) + 602(g)

Please and thank you so much! Your help is very appreciated.</sub>

2007-12-05 17:39:20 · 2 answers · asked by blackblue 1 in Chemistry

how do you dind the equation of the tangent line f(x)=x√(1+x^2) at (1,√2).

2007-12-05 17:38:03 · 3 answers · asked by elva1989 1 in Mathematics

Give the formula for its nth term also and show the addition of those two terms.

2007-12-05 17:35:12 · 2 answers · asked by sv 7 in Mathematics

Suppose that we were going to conduct a study to determine if there is an increased risk of getting lung cancer based on whether the person excerises regularly or not. In our excerising regularly group(1), we find than 2 out of 100 get lung cancer. In our non excersing group(2), we find that 5 out of 100 get lung cancer. What is the sample relative risk? (Give to one decimal place.)


And best answer will not go to anyone who tells me "do your own homework" (surprise surprise) If I knew how to do this, or how to find out, I wouldn't be wasting the time or the points.

2007-12-05 17:32:13 · 7 answers · asked by Mrs. Eric Cartman 6 in Mathematics

2007-12-05 17:27:51 · 2 answers · asked by Aquarius 1 in Biology

9. A new test is developed to test for a certain disease, giving "positive" or "negative" results to indicate that the person does or does not have the disease. For a person who actually has the disease, the test will give a positive result with probability 0.95. For a person who does not have the disease, the test will give a positive result with probability 0.05. Furthermore, only one person in 1000 actually has the disease. If a randomly selected person is given the test and tests positive, what is the probability that the person actually has the disease?

5. Which of the following is more probable:
correctly guessing all the answers on a 20-question true-false exam
flipping a coin 20 times and obtaining all heads
correctly guessing all the answers on a 10-question multiple-choice exam that contains five choices for each question
Support your choice with appropriate reasoning. Please give explanation thats the most important thing for me

2007-12-05 17:26:30 · 3 answers · asked by Anonymous in Mathematics

I need help on solving multi step equations can you please help me here's an example
m+12 over 9m = 5 over 9
sorry i cant do fractions on the computer and also how do you check it to see if its right

2007-12-05 17:25:10 · 5 answers · asked by Ck23 2 in Mathematics

example would be

x+4/x-6 is less then or equal to 0

well i get the answer as (-4,6) but i know the need for brackets is in there because its an equal to question, which number do you know to put the bracket on or is it both? please help and thanks!

2007-12-05 17:21:17 · 5 answers · asked by bfcookie2002 3 in Mathematics

2007-12-05 17:20:05 · 26 answers · asked by Mark F 2 in Biology

2007-12-05 17:19:02 · 9 answers · asked by Mark F 2 in Astronomy & Space

2007-12-05 17:15:30 · 1 answers · asked by Anonymous in Mathematics

In length which is the longest beach in the world?

2007-12-05 17:14:04 · 10 answers · asked by subramanian k 1 in Geography

A laboratory sample consists of a mixture of two radioactive substances, both of which decay into inert gases which evaporate into the air. The initial composition of the sample by weight is 20% of substance A and 80% of substance B and the initial weight of the sample is 264 grams. After 2 days the sample weighs 217.612240257459 grams and after 4 days it weighs 179.666588758521 grams.
a) What is the half-life of substance A?
b) What is the half-life of substance B?
(c) What will the sample weigh after 25 days?

I'm confused about how to deal with the 2 substances in the sample, so I don't even really know where to start with this one.

2007-12-05 17:12:46 · 2 answers · asked by Laura 1 in Mathematics

make LHS = RHS
cos(x+y)cosy + sin(x+y)siny = cosx

I expanded both cos(x+y) and sin(x+y) then expanded again, and that's where I'm stuck, was I even suppose to expand again?

Please provide a full solution, thanks!

2007-12-05 17:10:13 · 4 answers · asked by fye 1 in Mathematics

What is the best emergency medicine book, for a emergency resident to reference?

For a general practitioner?

For a Med student?

2007-12-05 17:02:22 · 3 answers · asked by airdoc 2 in Medicine

How many years of college do you need to be a marine biologist?

2007-12-05 17:02:21 · 3 answers · asked by Anonymous in Biology

2007-12-05 17:01:55 · 4 answers · asked by Markeh 1 in Zoology

Two men on the same side of a tall building notice the angel of elevation to top of the building to be 30 degrees and 60 degrees respectively. If the height of teh building is known to be h = 50 m, find the distance between the two men

2007-12-05 17:01:28 · 4 answers · asked by Cynical_Soul 1 in Engineering

I know athieism is non belief in a god(s), but what about paranormal things, like ghosts, poltergeists, other spirits, orbs, demons, all that stuff, also Aliens. Do you believe?

2007-12-05 17:00:49 · 7 answers · asked by super17ohyeah 3 in Paranormal Phenomena

Please help with these chemsitry questions

2007-12-05 16:59:51 · 2 answers · asked by Tonie M 1 in Chemistry

a model airplane has a mass of .9 kg and moves at a constant speed in a circle that is parallel to the ground. Find the tension T in the guideline (length = 17 m) for speeds of 19 m/s and 38 m/s.

b) if the model airplane has a speed of 28m/s and a mass of .9 kg. The plane flies ona circle that is parallel to the ground. Find the Tension T in the guidelines whose lengths are 11 m and 22m

2007-12-05 16:59:43 · 2 answers · asked by Anonymous in Physics

condensed chromosomes in mitosis have all of the following structures except?

a. ribosomes
b. 300-nm fibers
c. nucleosomes
d. 30-nm fibers
e. looped domain

i think the answer is either ribosomes or 300-nm fibers.. but not really much of an idea. help please? thanks

2007-12-05 16:54:49 · 2 answers · asked by Mr.Deeds 5 in Biology

The problem reads: " For vector v = (-3,4), graph the vector, compute its magnitude and find the angle of the vector and the nearest x-axis.

I drew a picture and used a parallelogram to help solve for the magnitude and angle of the vector and the x-axis.

I got a magnitude of 5 for v and the angle of v and the x-axis is 53.1 degrees.

If anyone could check this over I would greatly appreciate it!

2007-12-05 16:48:16 · 4 answers · asked by No Doubt 1 in Mathematics

The reason I ask is because everyone says that nothing can travel faster but I always thought maybe we wouldn't know if something did because it would be beyond our visual abilities. Thanks

2007-12-05 16:44:00 · 6 answers · asked by Anonymous in Physics

An alert physics student stands beside the tracks as a train rolls slowly past. He notes that the frequency of the train whistle is 446 Hz when the train is approaching him and 442 Hz when the train is receding from him. From this he can find the speed of the train. What value does he find?
_______m/s (Assume the speed of sound is 345 m/s.)

2007-12-05 16:43:04 · 5 answers · asked by Anonymous in Physics

2007-12-05 16:42:51 · 3 answers · asked by Anonymous in Mathematics