Sunday

August 28, 2016
Total # Posts: 5,493

**Math help!**

Find the derivative of tan(ln(5x))
*June 11, 2014*

**Math help!**

Find the derivative. F(x)=x^4+x^2+1/(x^2+1)
*June 11, 2014*

**math please help!**

Find the derivative if f(x)= e^-3x times sin(4x) use the product rule.
*June 11, 2014*

**Math- urgent**

Thank you!
*June 10, 2014*

**Math- urgent**

How do you find the sine, cosine, and tangent of a triangle?
*June 10, 2014*

**Microeconomics**

How do costs play into your everyday life? For example, why might it be cheaper to drive on a toll-road vs. a free-access interstate? Also, can you identify situations where you may fall victim to the sunk cost fallacy (we all do)?
*June 10, 2014*

**trig**

A weight attached to a long spring is bouncing up and down. As it bounces, its distance from the floor varies periodically with time. You start a stopwatch. When the stopwatch reads 0.3 seconds, the weight reaches its first high point 65 cm above the ground. The next low point...
*June 9, 2014*

**civics**

WOW im dumb today it must be C?
*June 4, 2014*

**civics **

How is the direct democracy similar to a representative democracy ? A. both types of government are run by a communist party. B.Both types of democracy give power to the elected representative. c.Both types of democracy give power to the elected representative. D. both types ...
*June 4, 2014*

**algebra**

X^9/x^2 H^14/h^5
*June 2, 2014*

**history**

wow i know what Writeacher said but she is accusing me of being some one else if you don't see in the comment
*May 29, 2014*

**history**

im just here to get some help
*May 29, 2014*

**history**

wait you cant acuss me of being someone that im not
*May 29, 2014*

**history**

no i dont know who that is
*May 29, 2014*

**history**

i dont know my teacher didnt send me one
*May 29, 2014*

**history**

hi i new to this and i need help with some world history questions and i don't have a book and I've already researched it and i did not find nothing. The conquest of new lands allowed Romans to A. increase the number of Roman citizens. B. decrease the number of slaves ...
*May 29, 2014*

**composition**

an animal i wanted for pet
*May 26, 2014*

**Algebra**

Find the coordinates of the image after a reflection in the given line. [-8, 1, -7] [-7, -5, 1]; y axis I am really bad with these types (matrices) of questions, please help me.
*May 26, 2014*

**physics**

An Angry Bird sits on a clothes line midway between the two poles. bird on line If the combined weight of the bird and rope is W, what is the tension in the rope in terms of θ and W? Select one: a. W cosθ / sinθ b. W tanθ c. W/(2sinθ) d. W/(2cosθ)
*May 26, 2014*

**physics**

An aircraft has an initial mass of m0 and an initial acceleration of a0. After flying for 2 hours, the mass of the aircraft has decreased by 11%, due to the burning of the fuel. If the propulsive force provided by the engines is constant, what is the expression for the new ...
*May 26, 2014*

**college physics**

A car travels around a bend of radius R at a speed v1, experiencing a centripetal acceleration ac. The car then travels around a curve with the same radius R, but with a centripetal acceleration which has twice the magnitude of ac. What speed is the car moving, when going ...
*May 25, 2014*

**English**

Thank you, Ms. Sue. :-)
*May 25, 2014*

**English**

Read the following lines from "An Arab Shepherd Is Searching for His Goat on Mount Zion." Searching for a goat or a son has always been in the beginning of a new religion in these mountains Which of the following sentences best explains the meaning of these lines? ...
*May 25, 2014*

**Guidance in early childhood education**

What are some ways that could create an encouraging classroom?
*May 25, 2014*

**Guidance in early childhood education**

What are some ways that could create an encouraging classroom?
*May 24, 2014*

**chemistry**

thanks for replying back Keq=(x)(x)/(0.1-x)(0.1-x) Keq=x^2/x^2-0.2x+0.01 do i take the square root of each side and then...
*May 22, 2014*

**chemistry **

initially 1 mol each of gaseous carbon dioxide, co2(g) and hydrogen h2(g) is inhected into a 10.0L reaction chamber at 986 degrees. What is the predicted concentration of each entity at equilibrium? the equation is as follows: co2(g)+ h2(g)= co(g)+h20 (g) k=1.60 at 986 degrees
*May 22, 2014*

**math**

Do you like have a graph or something
*May 21, 2014*

**math**

simplify. what are the excluded values? x^2+6x+9/5x+15
*May 20, 2014*

**Science**

Which one of the following factors would not speed up a chemical reaction
*May 15, 2014*

**geometry**

Concrete can be purchased by the cubic yard. How much will it cost to pour a slab that is 17 ft by 17 ft by 4 ft if the concrete costs $50.00 per cubic yard?
*May 14, 2014*

**Chemistry**

if you produce 5.7 of H2O, how many liters of O2 will be required?
*May 11, 2014*

**chemistry**

One kind of battery used in watches contains mercury(II) oxide. As current flows, the mercury(II) oxide is reduced to mercury. HgO(s) + H2O( ) + 2 e– Hg( ) + 2 OH–(aq) If 2.3 10–5 amperes flows continuously for 1200 days, what mass of Hg( ) is ...
*May 10, 2014*

**math**

The current river flows at rate of 4mph. In order for a boat to travel 24 miles up river and then return in a total of 5 hours how fast must the boat be able to travel in still water?
*May 8, 2014*

**Math (Quadratic Equations)**

A field is bound on one side by a river. A farmer wants to enclose the other three sides of the field with fence in order to create a rectangular plot of land for his cows. If the farmer has 400m of fence to work with, determine the maximum possible area of the field and the ...
*May 7, 2014*

**Language Check 2 Writeateavher**

I need help with 2,3 ,5, 6,7 , 9 PLEASE
*May 7, 2014*

**Language Check 2 Ms.Sue**

Correct capitalization, punctuation, and spelling. 1. We keep a variety of emergency equipment in the trunk of our car, a first-aid kit, jumper cables, a blanket, a flashlight, and road flares. A. car a first-aid B. car: a first-aid C. car; a first-aid D. car: a 1st-aid E. ...
*May 7, 2014*

**Language Check Ms.Sue**

I really don't. Can you explain the answer up each one. This is just for practice
*May 7, 2014*

**Language Check Ms.Sue**

I need help with 2, 3, 5, 6 PLEASE
*May 7, 2014*

**Language Check Ms.Sue**

Choose correct capitalization, punctuation, and spelling. 1. Thank you for you're prompt response to my request information about traveling to Australia. A. Thank you for youre B. Thank you for youre' C. Thank you for your D. Thank you for your' E. Correct as is MY...
*May 7, 2014*

**Math**

Add: 2/y^2 - 3x/y-x - 3/y
*May 6, 2014*

**Sam**

How?
*May 6, 2014*

**physics**

Thanks for your help, but I think that it is wrong. I keep getting 1.13 m/s as the answer, so I don't know if I went wrong somewhere.
*May 6, 2014*

**physics**

Yes, I think we are supposed to assume that it is in water.
*May 6, 2014*

**physics**

A steel sphere of radius 6.5 mm is dropped into a lake. What is the terminal speed of the sphere?
*May 6, 2014*

**physics**

A block of mass 20 g sits at rest on a plate that is at the top of the fluid on the right side of a U-tube. The U-tube contains two different fluids with densities ρ1 = 900 kg/m^3 and ρ2 = 630 kg/m^3 and has a cross sectional area A = 5.3x10^-4 m^2. The surfaces are ...
*May 6, 2014*

**physics**

A block of mass 20 g sits at rest on a plate that is at the top of the fluid on the right side of a U-tube. The U-tube contains two different fluids with densities ρ1 = 900 kg/m^3 and ρ2 = 630 kg/m^3 and has a cross sectional area A = 5.3x10^-4 m^2. The surfaces are ...
*May 6, 2014*

**physics**

A block of mass 20 g sits at rest on a plate that is at the top of the fluid on the right side of a U-tube. The U-tube contains two different fluids with densities ρ1 = 900 kg/m^3 and ρ2 = 630 kg/m^3 and has a cross sectional area A = 5.3x10^-4 m^2. The surfaces are ...
*May 6, 2014*

**chemistry**

An 0.727 mol sample of argon gas at a temperature of 22.0 °C is found to occupy a volume of 26.2 liters. The pressure of this gas sample is how many mm Hg?
*May 5, 2014*

**chemistry**

1. A 2.00 g sample of a particular compound was dissolved in 15.0 g of carbon tetrachloride. The boiling point of this solution was determined to be 77.85ºC. For pure CCl4, TB = 76.50ºC and KB = 5.03°C·kg/mol Calculate the boiling point elevation, ΔTB...
*May 4, 2014*

**chemistry**

A 2.00 g sample of a particular compound was dissolved in 15.0 g of carbon tetrachloride. The boiling point of this solution was determined to be 77.85ºC. For pure CCl4, TB = 76.50ºC and KB = 5.03°C·kg/mol Calculate the boiling point elevation, ΔTB, ...
*May 4, 2014*

**chemistry**

The acid dissociation constant, Ka, for this reaction is given by the following formula (this is also in your book): Ka=[H3O+][A−][HA] The acid concentration, [HA] is given in the introductory information of this problem. Using this information and your answers from the ...
*May 4, 2014*

**chemistry**

The chemical reaction for dissociation of an acid is: HA + H2O → H3O+ + A- Assuming all of the hydronium ion (calculated in in the previous problem) comes from this reaction, what is the concentration of conjugate base, [A-], in this system?
*May 4, 2014*

**chemistry**

The pH of a 0.00100 M solution of a particular acid is 4.95 at 25°C. Use the solution pH to calculate the concentration of hydronium ion present [H3O+]
*May 4, 2014*

**physics**

Consider a rectangular swimming pool of depth 2.3 m with a width and length of 13 m. What is the force exerted by the water on one of the sidewalls of the pool?
*May 3, 2014*

**Science**

@Spodermen?
*May 1, 2014*

**Science**

Are those correct?
*May 1, 2014*

**Spanish 1**

How do you respond to these spanish questions? ¿Como se llaman tus padres? ¿De donde son? ¿Donde trabajan? ¿Cuantos hermanos tienes?¿Como se llaman?Donde estudian o trabajan? Cuantos primos tienes?Cuales son los apellidos de ellos?¿...
*April 30, 2014*

**statistics**

Build a 95% confidence interval for the mean of the population from the given sample data. Assume that the population has a normal distribution. 16.4, 15.7, 16.2, 15.8 17.1 15.8, 15.9, 16.0, 16.4 15.0 *please help me solve this! I have no clue what I am supposed to do
*April 29, 2014*

**Math -Help**

you have a space in your garden for 100 small flowering bulbs. Crocus bulbs cost $0.45 each, and daffodil bulbs cost $0.85 each. Your budget allows you to spend $55.80 on bulbs. How many crocus bulbs and how many daffodil bulbs can you buy?
*April 29, 2014*

**Biology**

The gene encoding for body color in zombie flies is "X-linked". Gray bodies are the wild-type trait and blue bodies are caused by a mutation - Set up a cross between a male with a blue body and a female who is homozygous dominant for a gray body. Indicate the geno ...
*April 27, 2014*

**Biology**

Punnett Square Help 1) Set up a Di-hybrid cross for these two traits (pod color and shape) Note:Green pods are dominate over yellow pods and inflated pods are dominant over constricted pods -Start off with both parents as heterozygotes/hybrids for BOTH genes and assume the ...
*April 27, 2014*

**Math- urgent**

4.9 So $4.90?
*April 27, 2014*

**Math- urgent**

Harry buys American cheese at the deli. He buys 1/4 pound at the cost of x dollars per pound. If he pays $12.25 for 2.5 pounds of cheese, what is the cost per pound? Please show your work.
*April 27, 2014*

**Math- urgent**

Thank you!
*April 27, 2014*

**Math- urgent**

Z/2-6=4 What does z equal? Please show your work.
*April 27, 2014*

**Science**

i don't know
*April 26, 2014*

**science**

Thanks everybody I got 4/4 on my QuickCheck!
*April 24, 2014*

**Physics**

A glass window pane has an area of 3.50 m2 and a thickness of 0.600 cm. If the temperature difference between its surfaces is 23.0°C, what is the rate of energy transfer by conduction through the window?
*April 22, 2014*

**health**

Which symptoms are more common in depressed children and adolescents than in adults with depression? A. Fears of separation B. Reluctance to meet people C. General aches and pains D. All of the above
*April 19, 2014*

**health**

I think its with b or c?
*April 19, 2014*

**health**

What is major depressive disorder? A. A disorder that is enabling and helps a person function normally B. A disorder characterized by symptoms that interferes with a person’s ability to work, sleep, study, eat, and enjoy once-pleasurable activities C. A disorder ...
*April 19, 2014*

**budgiting**

Which one of the following statements best describes a budget "blind spot"? A. Too little money was set aside to cover an expense. B. This is an expense the person overlooked or did not account for when setting up the budget. C. This is an item that requires periodic...
*April 18, 2014*

**Health**

The ________the concentration of HIV in semen or genital fluids, the more likely it is that HIV will be transmitted to a sex partner. A. Lower B. Weaker C. Higher D. All of the above
*April 17, 2014*

**Health**

________ is the most frequently reported bacterial sexually transmitted disease in the United States. A. Chlamydia B. Syphilis C. Herpes D. Gonorrhea
*April 17, 2014*

**Math- urgent**

How can -2.65 be written as the ratio of two integers?
*April 16, 2014*

**Chemistry**

For the balanced redox reaction 2 Al(s) + 3 Br2(g) → Al2Br6(s), determine the number of electrons transferred in the overall reaction.
*April 14, 2014*

**DrBob222**

Just for my understanding if you don't mind could you explain how you were able to get 5e? I was able to derive everything else except that portion.
*April 14, 2014*

**Math**

Bobo bought a 1 ft squared block of cheese. He needs to cut it into 3 in. cubes. The block is yellow outside but green on the inside. How many 3 in. cubes does it have? How many of the cubes have no yellow face, one yellow face, 2 yellow face, etc. Please help!!!
*April 13, 2014*

**Algebra**

Bobo bought a 1 ft squared block of cheese. He needs to cut it into 3 in. cubes. The block is yellow outside but green on the inside. How many 3 in. cubes does it have? How many of the cubes have no yellow face, one yellow face, 2 yellow face, etc. Please help!!!
*April 12, 2014*

**Chemistry**

That's brilliant help :) thank you so much
*April 12, 2014*

**Chemistry**

im just stuck on how to do the last part. 5.00 = 4.74 + lot (15/x) Solve for x = millimoles acetic acid and convert that to grams in 500 mL solution ? thank you very much
*April 12, 2014*

**Chemistry**

Calculate pH of an acetate buffer containing 27.5 mM acetic acid (pKa is 4.74) and 50 mM sodium acetate. When a 30 mM aq solution of sodium acetate was prepared in the lab it had a pH of 8.8. Calculate the amount of acetic acid (in g) to be added to 0.5 L of this sodium ...
*April 12, 2014*

**Calculus**

When one-sided limits are not equal to each other at a point, what can be said about the continuity of the function at that point? I know that when one-sided are not equal to each other then the limit does not exist at that point. but i do not know what can be said about the ...
*April 11, 2014*

**Calculus**

Use the alternate definition, lim x->a f(x)-f(a)/x-a, to determine the instantaneous rate of change of f(x)= 1/x at the point (1,1/5) a)1/5 b)-1/5 c)1/25 d)-1/25
*April 11, 2014*

**University**

yes, it will be treated the same :)
*April 10, 2014*

**University- Canada**

Getting a degree from a university or college is pretty much the same and they both are good. Now, some Canadian colleges give out diplomas (for certain courses)and diplomas are not as high as degrees. This is mainly because diplomas can be earned in under 4 years which the ...
*April 10, 2014*

**Calculus**

Would you be able to help me with a couple of questions? thanks in advanced! 1. I am given the graph f(x)=x^2-2x. I have to draw a line tangent to the point (0,0). Then, I have to estimate the slope at that point. how would I go about answering this question? would I first ...
*April 10, 2014*

**Calculus**

Thanks Steve! For 2a, I meant 5/2+x, then i got 5/2+1 and then 5/3
*April 10, 2014*

**Calculus**

I was wondering if you would be able to check if my answers are correct: 1. An oil tank is being drained for cleaning. After t minutes there are v litres of oil left in the tank, where v(t)=40(20-t)^2, 0<=t<=20. Determine the rate of change at the time t=10. For this ...
*April 10, 2014*

**Calculus**

I am stuck on both of these questions. Would you please tell me if my reasoning is correct? 1. An object is dropped off a building. When comparing the average velocity of the object over equal time intervals, explain the difference between early time intervals and later time ...
*April 10, 2014*

**Calculus**

which of the following is not a type of break in the graph? a) holes b) horizontal asymptotes c) jumps d) vertical asymptotes I know for sure that a is not the answer and i doubt that c is the answer. I think the answer would be b. 2. Describe what can be inferred about the ...
*April 9, 2014*

**Calculus**

I am re-posting this question because i wrote the incorrect function last time. An oil tank is being drained for cleaning. After t minutes there are v litres of oil left in the tank, where v(t)=35(25-t)^2, 0<=t<=25 a) determine the average rate of change of volume during...
*April 9, 2014*

**health service management**

Do you feel that benchmarking decreases creativity? Explain your answer.
*April 9, 2014*

**Calculus**

I have a couple of questions and i wanted to know if my answers are correct. Thanks in advanced! 1. Determine the values of x for which the function f(x)=x+2/x-2 is discontinuous Would the answers be x=2 because the function would be undefined? 2. An oil tank is being drained ...
*April 9, 2014*

**3rd grade math**

The denominator and numerator are the same so that mean's it's 1 whole.
*April 8, 2014*

**statistics**

Since, in general, the longer a car is owned the more miles it travels one can say there is ______ between age of a car and milege. a positive association, no association, a negative association, a scattered association
*April 2, 2014*

**Physics**

A 2115 kg car moving east at 10.61 m/s col- lides with a 3169 kg car moving north. The cars stick together and move as a unit after the collision, at an angle of 32.4◦ north of east and at a speed of 5.03 m/s. What was the speed of the 3169 kg car before the collision?
*April 1, 2014*

**Physics**

sorry, my diagram is not showing properly .. it is a pulley with mass one hanging from the left side and mass two hanging from the right side
*April 1, 2014*

**Physics**

For the system of two crates and a pulley in the figure below, what fraction of the total kinetic energy resides in the pulley? (Assume m1 = 14 kg, m2 = 10 kg and mpulley = 5 kg.) (( o )) | | | | [m1] | [m2]
*April 1, 2014*