Monday

March 2, 2015

March 2, 2015

Total # Posts: 78,353

**Biology**

Which of the following sequences is an example of a point mutation of the DNA sequence -A-A-G-T-G-C- ? (What?) -A-A-A-T-G-C- -A-A-G-U-G-C- -G-T-A-G-A-A-C- -A-A-G-G-T-C-
*December 31, 2014*

**Calculus**

f(x)= x/(1+x)^2 c) find the intervals of concavity and the inflection points. My answers: f is concave downward on (- infinity, 2) and concave upward on (2, infinity). Inflection point: ( 2, 2/9)
*December 31, 2014*

**Calculus**

Thank you, Damon!
*December 31, 2014*

**Calculus**

I don't get how you get this part: f' = (1-x)/(1+x)^3 f" = [(-1)(x+1)^3 - 3(1-x)(x+1)^2]/(x+1)^6 = [-(x+1)+3(x-1)]/(x+1)^4 ( I don't understand how you got this!!) = (-x-1+3x-3)/(x+1)^4 = (2x-4)/(x+1)^4
*December 31, 2014*

**psych**

Imagine you are a researcher who believes that a relaxation technique involving visualization will help people with mild insomnia fall asleep faster. You randomly select a sample of 20 participants from a population of mild insomnia patients and randomly assign 10 to receive ...
*December 31, 2014*

**english**

Essays, articles, and speeches are all works of nonfiction. Which of the following is an accurate statement about the authors of nonfiction? A. They are always real people. B. Their style is always full of figurative language. C. They usually focus on retelling historical ...
*December 31, 2014*

**Calculus**

What is the derivative of f(x)=(10-3x)/2• sqrt of (5-x)?
*December 31, 2014*

**physics**

10. A 2-kg object is moving at 3m/s. A 4-N force is applied in the direction of motion and then removed after the object has traveled an additional 5m. The work done by this force is: A. 12 J B. 15 J C. 18 J D. 20 J E. 38 J ans: D 11. A sledge (including load) weighs 5000 N. ...
*December 31, 2014*

**Calculus **

f(x)= x/(1+x)^2 a) find the intervals on which f is increasing or decreasing. Is it ....f is decreasing on the intervals (- infinity, -1) and (1, infinity)...f is increasing on the interval (-1, 1)....... b)find the local min and max values of f.. For f(-1) I got undefined... ...
*December 31, 2014*

**Math**

I am aware. However, my test says to ONLY use multiplication or division using fractions.
*December 31, 2014*

**Math**

If 360 workers called in sick and 240 went to work, how many workers work at the company all together? Solve using fractions and multiplication or division. Obviously the answer is 600 but how do I solve the problem using multiplication or division?
*December 31, 2014*

**Calculus**

a) find the intervals on which f is increasing or decreasing. Is it ....f is decreasing on the intervals (- infinity, -1) and (1, infinity)...f is increasing on the interval (-1, 1)....... b)find the local min and max values of f.. For f(-1) I got undefined... f(1)=1/4....... ...
*December 31, 2014*

**Algebra**

.06 (3000)t = 500
*December 31, 2014*

**earth science**

monsoon
*December 30, 2014*

**Pre-Calc/Trigonometry**

oh okay i got 25 minutes, is that right?
*December 30, 2014*

**Pre-Calc/Trigonometry**

You place a cup of 205oF coffee on a table in a room that is 72oF, and 10 minutes later, it is 195oF. Approximately how long will it be before the coffee is 180oF? Use Newton's law of cooling: 1 hour 25 minutes 15 minutes 45 minutes
*December 30, 2014*

**Pre-Calc/Trig**

A potato is put into an oven that has been heated to 350F. Its temperature as a function of time is given by T(t) = a(1 - e-kt) + b. The potato was 50F when it was first put into the oven. if the potato is 60F after 2 minutes, what is the value of k? ...
*December 30, 2014*

**Pre-Calc/Trig**

okay thanks :)
*December 30, 2014*

**Pre-Calc/Trig**

A body was found at 6 a.m. outdoors on a day when the temperature was 50oF. The medical examiner found the temperature of the body to be 66oF. What was the approximate time of death? Use Newton's law of cooling, with k = 0.1947. A. Midnight (12 a.m.) B. 5 a.m. C. 2 a.m. D...
*December 30, 2014*

**us history**

Thx! I bet this person goes to Lavilla like me... It's on our civics take-home test
*December 30, 2014*

**us history**

Army Major Hart is accused of stealing the payroll for his division. Which type of law would he be subject to: A. Civil B. Criminal C. Military D. Constitutional
*December 30, 2014*

**Health**

But there are both good and bad stress.
*December 30, 2014*

**Health**

Would laughing to jokes count as stress?
*December 30, 2014*

**REVISED Improving Writing.**

Thank you, I corrected that :) !
*December 30, 2014*

**REVISED Improving Writing.**

Draft an interoffice memorandum to Miriam Hopkins, the Director of Human Resources: a. Assume that you’ve received confirmation from Jeremy Dittmer for the date, time, and materials needed. The trainer he has assigned is Deb Walker (email: Deb.Walker..). b. Outline the ...
*December 30, 2014*

**Math**

142500
*December 30, 2014*

**algebra**

a premature baby weighs only 3 pounds, 2 ounces at birth. After 16 days in intensive care, the baby has gained 22 ounces. Measure the babys age in days and weight in ounces. Assume the baby continues to gain weight at this same rate and a month has 30 days. What could be a ...
*December 30, 2014*

**maths**

An open rectangular box measuring 28cm by 20cm by 12cm internally is made of wood 0.5 cm thick. find the volume of wood used in making box?
*December 30, 2014*

**physics**

Two carts are in contact on a horizontal frictionless surface. Cart 'A' has a mass of 3 kg, and cart 'B' a mass of 2 kg. (a) Find the force F on 'A' needed to give the two carts an acceleration of 0.8 m/sec2 . What is then the force exerted on 'B&#...
*December 30, 2014*

**Pre-Trig/Calc**

Please help :) A potato is put into an oven that has been heated to 350F. Its temperature as a function of time is given by T(t) = a(1 - e-kt) + b. The potato was 50F when it was first put into the oven. What is the value of b in this context? Explain. What is ...
*December 29, 2014*

**PRE-CALC**

thanks Damon :)
*December 29, 2014*

**PRE-CALC**

If you put $2,000 in a savings account that pays 6% interest compounded continuously, how much money will you have in your account in 4 years? Assume you make no additional deposits or withdrawals
*December 29, 2014*

**geometry**

draw the grid
*December 29, 2014*

**geometry**

Find the locus of a point which is equidistant from the origin and the point (-2,5)
*December 29, 2014*

**RE RE REVISED IMPROVING WRITING**

Special note to my all time favorite: Writeacher: I am sorry that my changes seemed as if I did not read your first notations, I did and I admit I changed only a few words. I am sorry if you thought I ignored it and just re submitted it. I am a beginner in writing business ...
*December 29, 2014*

**Water Treatment**

a) need solution b)5 c)2
*December 29, 2014*

**Improving Writing- REVISED VERSION**

Assume that you’ve worked for the last five years as an administrative assistant for the Human Resources Department of Broadworth General Hospital. The Director of Human Resources, Miriam Hopkins, has charged you with organizing a two-hour training seminar to be attended ...
*December 29, 2014*

**calculus**

A rectangular box has a square base with an edge length of x cm and a height of h cm. The volume of the box is given by V = x^2h cm^3. Find the rate at which the volume of the box is changing when the edge length of the base is 12 cm, the edge length of the base is decreasing ...
*December 29, 2014*

**calculus**

A rectangular box has a square base with an edge length of x cm and a height of h cm. The volume of the box is given by V = x^2h cm^3. Find the rate at which the volume of the box is changing when the edge length of the base is 4 cm, the edge length of the base is increasing ...
*December 29, 2014*

**math**

Describe a situation this week when you used math to solve a problem involving data, graphs and statistics.
*December 29, 2014*

**IMPROVING WRITING**

I have 3 essays if someone could correct them for me ! #1 I am writing to you regarding an upcoming seminar that will cover the sensitive topics of sexual harassment and unlawful discrimination. It would be my humble request if you could supply an appropriate trainer who will ...
*December 28, 2014*

**geography**

Why is the biodiversity of the rain forest important
*December 28, 2014*

**Physics**

Thanks!
*December 27, 2014*

**Physics**

a 15000 kg airplane descends a vertical distance of 10.0 km over a horizontal distance of 80.0 km. What is the airplane's loss of potential energy. (I'm confused about the height) Ep=mgh m= 15000 kg g= 9.81 m/s^2 h=??
*December 27, 2014*

**Biology**

That's why I'm confused. I'm asked about where it ends, and it is not exactly an open-ended question.
*December 27, 2014*

**Biology**

Where does the carbon cycle end? My project asks this, but I can of no specific "ending."
*December 27, 2014*

**Biology**

How does oxygen move in a food chain? When one organism eats another, does the oxygen move from the tissues of the prey to the predator, or is it something different?
*December 27, 2014*

**English**

What does the idiom to be "a little on the short side" mean?
*December 27, 2014*

**math**

i thought of it like this: 36 divided by 4 is 9, so if i divided 24 by 9, i might get the answer. but i wasn't sure, so i asked.
*December 26, 2014*

**math**

a muffin recipe calls for 4 cups of sugar and yields 36 muffins. if amelia only wants to make 24 muffins, how much sugar will she need?
*December 26, 2014*

**math**

thanks!
*December 26, 2014*

**math**

the bookstore normally sells mechanical pencils for $6.50. this week the pencils are discounted by 25%. to the nearest cent, what is the amount of the discount?
*December 26, 2014*

**Algebra**

well no problem!
*December 26, 2014*

**Algebra**

I could not have gotten this without your help. I kept getting 5040.
*December 26, 2014*

**Algebra**

10C6 = 10! / (6! * 4!) = 10 * 9 * 8 * 7 / 4! = 5040/24 = 210 hope this helps
*December 26, 2014*

**Algebra **

What is the value of 10C6? (How go get it?)
*December 26, 2014*

**engineering mechanics**

A block P weighing 200KN rests on the top of the block Q of weight 300KN and they are connected by a common string passing around a frictionless pulley S which is tied to a vertical wall by a horizontal string as shown if the coefficient of friction between the rubbing ...
*December 26, 2014*

**physics**

A golfer takes two putts to sink his ball in the hole once he is on the green. The ﬁrst putt displaces the ball 8.70 m east, and the second putt displaces it 6.04 m south. What displacement would put the ball in the hole in one putt? Answer in units of m and.......... ...
*December 25, 2014*

**French**

Which sentence is correct? Les chiens de filles sont gentils. Les chiens des filles sont gentils.
*December 25, 2014*

**English - Animal Farm**

The apples and milk.
*December 24, 2014*

**English - Animal Farm**

What negative traits are visible in the pigs after the rebellion in Chapters 1-3? I have read the chapters, but I can only come up with one example.
*December 24, 2014*

**Language arts**

What's your answer for this question?
*December 24, 2014*

**math**

Tom has $10 that he wants to use to buy pens and pencils. However, he does not want to buy more pens than pencils. A pen costs $3, and a pencil costs $1. Which graph represents this scenario? (Here, x represents the number of pens and y the number of pencils.)
*December 24, 2014*

**English**

Identify the sound device Shakespeare uses in this passage: HAMLET. Whose spirit with divine ambition puffed Makes mouths at the invisible event, —Hamlet, act 4, scene 4 I think it is D assonance alliteration onomatopoeia meter
*December 24, 2014*

**algebra**

. The function g(t) = 2t represents the number of guitar lessons, g(t), you can complete in t months. How many guitar lessons can you complete in 7 months? Provide your conclusion as a complete sentence. t is months, and there's 7 months given so plug that to t in the ...
*December 23, 2014*

**Chemistry**

balloon has a volume of 6.6 liters at 25.0 C. The balloon is then heated to a temperature of 92.7 C. The volume of the balloon after heating will be liters
*December 22, 2014*

**Chemistry**

what mass of sodium sulphate is produced If 49g of hydrogen sulphate reacts with 80g of Nitrogen dioxid ?
*December 22, 2014*

**PHYSICS**

Design a carnival ride on which standing passengers are pressed against the inside curved wall of a rotating vertical cylinder. It is to turn at most at 1/3 revolution per second. Assuming a minimum coefficient of friction of 0.70 between clothing and wall, what diameter ...
*December 22, 2014*

**physics**

Design a carnival ride on which standing passengers are pressed against the inside curved wall of a rotating vertical cylinder. It is to turn at most at 1/3 revolution per second. Assuming a minimum coefficient of friction of 0.70 between clothing and wall, what diameter ...
*December 22, 2014*

**math**

A store offers 25% off merchandise that is already discounted by 30%. Is this the same as a 55 % discount off the original price? Write an example to illustrate your reasoning. Can someone please help me?
*December 22, 2014*

**Isaac**

I think it is not really full of stakes, therefore it is overstatement.
*December 22, 2014*

**Isaac**

“I was so anxious to see it kept entire, lest the goats should break through, that I never left off till, with infinite labour, I had stuck the outside of the hedge…full of stakes…” —Robinson Crusoe by Daniel Defoe I think it is C Understatement ...
*December 22, 2014*

**English**

I would think it would be A
*December 22, 2014*

**English**

What is the purpose of hierarchical structure in a media message? Hierarchical structure helps the reader weed out unimportant information. Hierarchical structure helps the author organize his or her writing. Hierarchical structure helps the reader determine the relationship ...
*December 22, 2014*

**math**

or greatest to least
*December 22, 2014*

**math**

what is an easier way to make decimal and fractions in least to greatest order. can u give me an example and thank u
*December 22, 2014*

**Math/Algebra 1**

You are welcome :)
*December 22, 2014*

**bbu**

Using all the following terms to establish balance sheet and income statement Owner equity =60,000 Net profit =? Account receivable =95,000 retained earnings =10,000 gross profit =? Interes expense =2,500
*December 22, 2014*

**chemistry**

how many moles of cao are needed to react with excess water to produce 370 grams of calcium hydroxide
*December 22, 2014*

**French**

Is "Elles sont belles" or "Elles sont belle" correct? I think it is the former.
*December 21, 2014*

**Integration**

a cattle trough has a trapezoidal cross section with a height of 1 m and horizontal sides of width 1/2 m and 1 m assume the length of the trough is 10 m. A. how much work is required to pump out the water in the trough? B. if the length is doubled does the amount of work ...
*December 21, 2014*

**Art**

What does the family look like it is celebrating in Le Traditionnel Gâteau des Rois by Edmond-Joseph Massicotte? It looks like Thanksgiving to me.
*December 21, 2014*

**AP CALC**

Find the POSITIVE value of x that satisfies the mean value theorem for f(x)=sin(x) on the closed interval [-3pi/2, 3pi/2]. please help I have no idea how to solve this problem
*December 21, 2014*

**ap calc**

if f(X)= 2X-X^2,if x<1 2x^2-4x+3, if >or equal to 1 find two values of c in the interval [0,2] that satisfy the mean value theorem. Please help I have no idea how to solve
*December 21, 2014*

**ap calc**

If f(x)=e^x, g(x)=sin(x), and h(x)=f(g(x)), then h'(pi/2)=? Please help I have no idea how to solve
*December 21, 2014*

**statistics**

interested in the mean IQ score of a given group of children. It is known that the IQ scores of the group have a standard deviation of . The psychologist randomly selects children from this group and finds that their mean IQ score is . Based on this sample, find a confidence ...
*December 21, 2014*

**finance**

which of the following investments paid the highest rate of return? (a) a corporate bond that paid $72 per year in interest and that cost $600 to purchase (b) a money market fund that paid 8 percent interest (c) a corporate stock that cost $40 to buy and that paid dividends of...
*December 21, 2014*

**economics**

A bond yields $100 yearly at 4 percent interest. What is the market value? I got $1,500.
*December 21, 2014*

**ap calc**

For the curve f(x)=xln(x)+ (1-x)ln(1-x), find the value of x in the interval 0<x<1 where f(x) has a minimum. Please help I have no idea how to solve.
*December 21, 2014*

**ap calc**

Find the value of c which satisfies Mean Value Theorem for the function f(x)=sin(x) on the closed interval (-3ð/2,3ð/2).
*December 21, 2014*

**Nothing Realted **

I know this question should not be here but my samsung galaxy s5 is not working. The screen will come but i can not do anything. Technically it is frozen. I have tried every method. I tried to take the battery out. It did not work. I also tried to reboot it but the options ...
*December 21, 2014*

**Math**

An experimental solid disc flywheel has a 300m diameter and a mass of 70kg. Experiments show that, at all speeds of rotation, the frictional resistance to motion is equivalent to a torque of 0.15Nm. if when the flywheel is rotating at 50 rev/min, the driving power is removed, ...
*December 21, 2014*

**biology**

What role does the lilac flower play in its natural ecosystem? What is its niche in the food web
*December 20, 2014*

**ap calc **

Find the value of c which satisfies Rolle's Theorem for the function f(x)=sin(x^2)on (0, ãpi).
*December 19, 2014*

**English**

But what are some characteristics of a revolutionary song?
*December 19, 2014*

**English**

How do I write a revolutionary song?
*December 19, 2014*

**Biology**

In an ecosystem, when energy is given off as heat, does it change forms from chemical substances to heat? Or is it something different?
*December 19, 2014*

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