Monday
March 2, 2015

Posts by Stephanie


Total # Posts: 1,050

half-life of radioisotope
A radioisotope has a half-life of 4 days. How much of a 20-gram sample of this radioisotope remains at the end of each time period? 1) 4 days 2) 8 days
October 31, 2008

math
a) 2/1 b) 2/1 I think this is right but you're gonna have to double check again
October 31, 2008

Math
I understand problems like this but with just a variable in the first one. Here, it has 12. This throws me off. factor 12m^2 + 25m + 12 = 0.
October 29, 2008

Social Science
What is a polygenous relationship?
October 28, 2008

Genetics
The question is as follows: The round trait is dominant over recessive wrinkled peas. A homozygous round pea mates with a homozygous wrinkled pea. The resulting F1 generation is self crossed and 900 round pea plants and 100 wrinkled plants are observed. What is the penetrance...
October 22, 2008

Biology(Anatomy&Physiology)
1)How many covalent bonds does it take to satisfy the carbon atom? 2)In the body, carbohydrates are stored in the form of: 3)Name the portion of an enzyme that attaches to the substrate. 4)The coiling of the protein chain backbone into an alpha helix is referred to as the 5)A ...
October 15, 2008

Biology(Anatomy&Physiology)
1)Which organelle makes most ATP 2)The chemical reaction that joins two amino acids is called 3)In a single molecule of water which type of bond holds the H to the O? 4)Which type of chemical bond results from the transfer of an electron from one atom to another 5)A chemical ...
October 15, 2008

Biology(Anatomy&Physiology)
1)Which group of organic molecules makes up your genetic code 2)A substance which tends to resist a change in the pH of a solution is called a 3)Which buffers is the most common in the body 4)Which of molecules is primarily made of CHON 5)Which is the building block or monomer...
October 15, 2008

Anatomy
1)Which two molecules/chemicals make up the backbone of the DNA molecule? 2)Which organelle makes most ATP? 3)AMP would have ________ phosphate(s) attached to it? 4)Which is the smallest carbohydrate 5)Which type of chemical bond involves a sharing of electrons
October 15, 2008

physics
25 & 20
October 15, 2008

physics
Two concurrent forces have a maximum resultant of 45 newtons and a minimum of 5.0 newtons. What is the magnitude of each of these forces?
October 15, 2008

science
how is rocks absolute age is determined?
October 9, 2008

math
explain how we use pi in the real world.
October 8, 2008

math
what is the true meaning and exact value of pi?
October 8, 2008

physics
ok, so you have to find the cos of x-axis: v*cos=(300m/s)cos 55 degrees, and then the sin of your y-axis: v*sin= (300m/s)sin 55 degrees. The vx (x-axis)is always constant. Then you have to use the formula: x=x(i)*t+ 1/2axt^2 to get the x- coordinate, y=y(i)*t +1/2ayt^2. That&#...
September 30, 2008

Critical Thinking
Are your answers correct?
September 29, 2008

ALGEBRA -- long division
Find each solution using long division. Show your work. Show that x + 1 is NOT a factor of... 2x^3 + x^2 - 11x - 30. Show that x - 3 IS a factor of 2x^3 - 11x^2 - 11x^2 + 12x + 9.
September 25, 2008

Trinomials
I need help with trinomials today. x^4 + 2x^2 - 24 and -x^2 - 5x + 14
September 24, 2008

Chemistry
Help! A solution is made by dissolving 33.7 g of MgCl2 in .35L of H20. What is the mass of the solvent? The density of water is 1.oo g/ml. Thanks!
September 22, 2008

MATH: TRINOMIALS
Hello. Can you explain to me how to factor the following. 30x^2 - 48x x2 + 6x + 7
September 21, 2008

algebra
Hello. Can you explain to me how to factor the following? 30x^2 - 48x 6x^2 + 7xy - 20y^2 Thank you.
September 21, 2008

earth
WHEN DID PRIMORDIAL OCEANS FORM?
September 18, 2008

criminal justice
can anyone put in lamen terms on what or how annotated bibligography?
September 10, 2008

7th grade
Help me solve this problem, I am lost here. These are integers, 15-12-8= also 4-(-7)-9= and -11-(-5)-(-6)=
September 9, 2008

criminal justice
what are two main functions of criminal law
September 7, 2008

Math
A man selling fruit has only three weights. But with them he can weigh any whole number of kilograms (from 1 kg to 13 kg) inclusive on his balance. What weights does he have? Responses math - Kalyan, Friday, September 5, 2008 at 4:38am The man had 1kg, 3kg and 9 kg weights. ...
September 5, 2008

math
How did you get this answer?
September 5, 2008

math
A man selling fruit has only three weights. But with them he can weigh any whole number of kilograms (from 1 kg to 13 kg) inclusive on his balance. What weights does he have? I can't figure this out
September 5, 2008

algebra
A man selling fruit has only three weights; but with them he can weigh any whole number of kilograms from 1 kg up to 13 kg, inclusive on his balance. What weights does he have?
September 4, 2008

psychology
Can you please tell me exactly what intrinsic means ? I am looking it up online and I still cannot understand the definition.
August 18, 2008

Chemistry- HWK CHECK
5 is B. I really find it mean that people deliberately put the wrong answers on this site. Is the pursuit of a decimal's worth of increased standing in the class distribution really worth lessening your character? Why can't we just help each other out fairly?
August 4, 2008

Law and Ethics
I am taking a course at Penn Foster and was having problems myself finding this information. It takes awhile but the AMA site really is helpful. Try looking for article E 5.07 and H 325.971. Also go to Google books and search the book Medical Ethics. It lets you preview the ...
July 20, 2008

Reseach paper
Should written policies be developed for abbreviation usage? If yes, what should the policies contain?
July 17, 2008

Algebra
what is factoral equations????
July 10, 2008

science- need some help
ms. Sue I have to do a powerpoint presentation I do not know where to start I am having a serious hard time on this 4th of July. Please help. I need some information that can help me start Power Pointpresentation that describes environmental benefits and challenges of ...
July 4, 2008

humanities
Aeneas is the main character. What book is he in? Who is the author?
May 14, 2008

Math
she had a bum steer
May 13, 2008

Chemistry 1
Does anyone know what websites are good to use for Chemical Reactions and balancing equation. I have a test tomorrow, and i need to really practice those. Thanks
May 13, 2008

Algebra 2 Honors
Right now in my class i am learning about sequences and series and im currtently suck on this problem. "A certain sequence is defined recursively by the t1=1 , t2=2, t2n=2t2n-2, t2n+1=3t2n-1. Find the first eight terms of the sequence." thanks for your help.
May 12, 2008

CHemistry
True/ False: The pH of a soln that is 0.20 M CH3COOH and 0.20 M CH3COONa should be higher than the pH of a 0.20 M CH3COOH soln Would it be true since CH3COOH and CH3COONa are both weak acids, and if you mix them together, it becomes more diluted, and hence should have a higher...
May 5, 2008

social studies
private and publis economics
May 1, 2008

Algebra 2 Honors- Ellipses REAL ONE
for my homework problem i have the equation: (x^2/16) + (y^2/1) = 1 I need to find out the center, the vertices, co- vertices and the Foci. I have trouble knowing how to find them, so if you can please explain them. Thank you.
April 30, 2008

Algebra 2 Honors- Ellipses
for my homework problem i have the equation: (x^2/16) + (y^2/4) = 1 I need to find out the center, the vertices, co- vertices and the Foci. I have trouble knowing how to find them, so if you can please explain them. Thank you.
April 30, 2008

Pre Calc-decode matrix
thanks
April 27, 2008

Pre Calc-decode matrix
help!-matrix size is 3x3 clues for the encoding matrix: 1. all entries are one digit and positive 2. a11, a12, a13 are all equal and prime, their sum is also prime 3.the sum of a11, a12, a13 is equal to a21 4. the sum of a22 and the opposite of a33 is zero. a22 is prime and ...
April 27, 2008

math
He has no property (HE HAS NO PROPER TEA!)
April 24, 2008

Math
i really have no idea!?!
April 22, 2008

science
the period when cell divide to create new cells is called?
April 22, 2008

social studies
withoutour two great political parties cutting across economic and geographic interest,democracy as we know it could never have been made to function.the author of this statement probably meant that;
April 22, 2008

chemistry
Woohoooo webworks!!
April 7, 2008

Statistics
What is a 95% confidence interval for mue, the population mean time the postal service employees have spent with the postal service? n=100 mean=7 S=2 years
March 30, 2008

math-statistics
18) Which of the following is the most significant result? A) P<.001 B) P<.005 C) P=.05 D) P>.05 Okay, I have the answer key and know the question is A, but I always thought that if the P value is greater than .05 than it IS considered significant and you can reject ...
March 29, 2008

english
I need help creating a crossword puzzle containing poetry terms. What do I do?
March 8, 2008

Numerical & Proportional Reasoning
the bloodhound has 4.0*10^9 scent receptors in its nose. a typical human has 1.2*10^7 scent receptors. how many time more scent receptors does a bloodhounds have than a human? round answer to the nearest whole number
February 23, 2008

st hilda's
where he and when he was born?
February 3, 2008

Chemistry
What is enthalpy in layman's terms?
January 17, 2008

biology
If a protein had 500 amino acids, how many nucleotides would there be?
January 2, 2008

social studies
How was the Acropolis a great environmental adaptation in Greece?
December 12, 2007

physics
A diver can change his rotational inertia by drawing his arms and legs close to his body in the tuck position. After he leaves the diving board (with some unknown angular velocity), he pulls himself into a ball as closely as possible and makes 2.16 complete rotations in 1.31 s...
December 4, 2007

physics
A figure skater is spinning at a rate of 1.7 rev/s with her arms outstretched. She then draws her arms in to her chest, reducing her rotational inertia to 62% of its original value. What is her new rate of rotation?
December 4, 2007

physics
A uniform disk with a mass of 800 g and radius 17.0 cm is rotating on frictionless bearings with an rotational speed of 18.0 Hz when Jill drops a 130 g clod of clay on a point 7.10 cm from the center of the disk, where it sticks. What is the new rotational speed of the disk?
December 4, 2007

social studies
who is a natural born citizen of this country
December 3, 2007

MATH
3x-8>10
November 29, 2007

Economics
Can someone please explain to me what "endogenous" and "exogenous" conditions affect the business cycle.
November 25, 2007

english
does anyone know what the book" the fugitive" is about?
November 21, 2007

chemistry
how do I know the ion value of elements on the production side of the equation when balancing with the electron transfer method?
November 14, 2007

Social Studies
I am doing a crossword puzzle. One of the questions was "The electoral college was developed because some of the founding fathers believed that too much democracy was a very ____thing. The answer is 9 letters long, and it has me completely stumped. Any idea where I could ...
November 8, 2007

Stats
is the answerposted for this?
October 31, 2007

Psychology
I don't believe the people on this site EVER help anyone. Everytime people ask questions, especially in the homework help, there's never really any help. just remarks like that.
October 27, 2007

Physics
Find the velocity after a stroller has traveled 6.32m.
October 24, 2007

math
begin with an 8 1/2 x 11 piece of paper. fold it 9accordion style to represent eighths and shad 5 of the 8 equal parts. Then fold and shade the paper to represent 1/3 of the 5/8. What is the multiplication problem being modeled? What is the solution?
October 23, 2007

math
? evaluate the expression: 3 to the 3rd power-(15-8)+ 4 x 5
October 9, 2007

Physics
No the answer is 707/3.
October 8, 2007

physics
A penny is dropped from the observation deck of the Empire State building (370 m above ground). With what velocity does it strike the ground? Ignore air resistance.
October 4, 2007

physics
Glenda drops a coin from ear level down a wishing well. The coin falls a distance of 14.80 m before it strikes the water. If the speed of sound is 343 m/s, how long after Glenda releases the coin will she hear a splash?
October 4, 2007

physics
A Nile cruise ship takes 21.7 h to go upstream from Luxor to Aswan, a distance of 208 km, and 19.4 h to make the return trip downstream. Assuming the ship's speed relative to the water is the same in both cases, calculate the speed of the current in the Nile.
October 4, 2007

physics
Two cars are driving toward each other on a straight, flat Kansas road. The Jeep Wrangler is traveling at 84 km/h north and the Ford Taurus is traveling at 43 km/h south, both measured relative to the road. What is the velocity of the Jeep relative to an observer in the Ford?
October 3, 2007

physics
An airplane lands and starts down the runway at a southwest velocity of 41 m/s. What constant acceleration allows it to come to a stop in 1.3 km?
October 3, 2007

math
HELP!!! How do I solve the following: 3h + 2 for h =10
October 1, 2007

Physics
I keep getting a negative answer for this...is that ok?
September 30, 2007

Physics
Ok that makes sense. But how do I come up with the distance below the climber?
September 30, 2007

Physics
A small first aid kit is dropped by a rock climber who is descending steadily at 1.3 m/s. After 2.5 s, what is the velocity of the first-aid kit, and how far is the kit below the climber? This problem seems like it should be easy, but I'm not sure which equation to use. I...
September 30, 2007

Paralegal Today
Assume that John submits ann offer to Lisa to purchase Lisa's home for $300,000. Lisa responds to John's offer with a counteroffer: she will sell John her home for $325,000. John then offers to purchase the home for $325,000 and Lisa accepts the offer. In each of these...
September 30, 2007

Paralegal today
What might result if an insurance applicant makes false statements in an insurance application? In this situation, will the policy be enforceable? Explain.
September 30, 2007

Physics
For part a, my book says the answer is 310 m. I'm still really confused on how they got this answer.
September 30, 2007

Advanced Math
Def: An interger "m" divides an integer "n" if there is an integer "q" such that n=mq. ?Suppose a, b, and c are integers such that a divides b and b divides c. Prove that a divides c.
September 27, 2007

Social Studies
What does Independent Invention mean?
September 26, 2007

Math
60
September 26, 2007

Math
9 divided by 66
September 23, 2007

U.S. Government
Sorry again, BUt i have a few more questions that I could not figure. 1. Give examples of which US culture or government has followed the classical republican model. 2. Give examples in which US culture or society has followed the natural rights model. 3. Which model is more ...
September 12, 2007

Government
In what ways were the founders influenced by the ideas of the natural rights philosophers? What proof can you show that the Founders were influenced by the natural rights philosophers?
September 12, 2007

Physics - REPOST
Sorry (impatient) and Thanks. So E=/F/ divide by /q/
September 11, 2007

Physics - REPOST
A styrofoam ball covered with a conducting paint has a mass of 5.0 x 10 ^-3 kg and has a charge of 4.0 microcoulombs. What electric field directed upward will balance the weight of the ball?
September 11, 2007

Physics
Sorry (impatient) and Thank you for your time. So is E=/F/ divide by /q/
September 11, 2007

Physics - REPOST
A styrofoam ball covered with a conducting paint has a mass of 5.0 x 10 ^-3 kg and has a charge of 4.0 microcoulombs. What electric field directed upward will balance the weight of the ball?
September 11, 2007

Physics
I would like logic on how to solve this problem. A styrofoam ball covered with a conducting paint has a mass of 5.0 x 10 ^-3 kg and has a charge of 4.0 microcoulombs. What electric field directed upward will balance the weight of the ball?
September 11, 2007

math
gordy has 187 cds.he wants to put them on shelves.each shelf holds 42 cds.how many shelves he be able to completely fill whit cds?
September 10, 2007

fin
The answer to question A. is $189,500
September 8, 2007

physics
The Space Shuttle astronauts use a massing chair to measure their mass. The chair is attached to a spring and is free to oscillate back and forth. The frequency of the oscillation is measured and that is used to calculate the total mass m attached to the spring. If the spring ...
September 5, 2007

science(physics)
can you help me??
September 5, 2007

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