# Posts by Rebekah

Total # Posts: 478

**calculus**

Find the general solution of the equation. 6t*dy/dt+y=sqrt (t),t>0.

*June 27, 2016*

**calculus**

500-gallon tank initially contains 200 gallons of brine containing 100 pounds of dissolved salt. Brine containing 2 pounds of salt per gallon flows into the tank at the rate of 4 gallons per minute, and the well-stirred mixture flows out of the tank at the rate of 1 gallon per...

*June 27, 2016*

**Music**

can someone p

*April 20, 2016*

**Music**

Can anyone help me with this question? Franz Schubert quoted the Ländler in his Piano Trio No. 1 in B-flat Major, op. 99, D. 898 by a) writing tumbling, non-metrical rhythms b)changing the meter c) writing alternating 3/4 measures of either notes and quarter notes d)...

*April 20, 2016*

**Trigonometry**

An aircraft took off at an angle of 32 degrees. How far had it flown when it reached a (vertical) height of 1200m (nearest metre)?

*April 12, 2016*

**Math**

I got 314?? Is this the answer??

*April 11, 2016*

**Math**

Can anyone help me with this? A homeowner wants to build a circular patio. If the diameter of the patio is 20 feet, what is its area to the nearest whole number? A)1,257 B)314 C)63 D)31

*April 11, 2016*

**Chemistry**

is the answer d

*April 3, 2016*

**Chemistry**

I don't know how to put that into my calculator

*April 3, 2016*

**Chemistry**

I need help with this question Which would have a higher boiling point? a.1.0 M KNO3 b.1.5 M KNO3 c.0.75M KNO3 d.2.0M KNO3

*April 3, 2016*

**Chemistry**

I need help with this question. If the solubility of a gas in water is 6.0 g/L when the pressure of the gas above the water is 2.0 atm, what is the pressure of the gas above the water when the solubility of the gas is 3.0 g/L?

*April 3, 2016*

**Chemistry**

I'm confused??

*April 3, 2016*

**Chemistry**

I need help with this question, I don't know how to set up the formula to work it out? Calculate the dissociation constant of a weak monoprotic acid if a 0.08 M solution of this acid gives a hydrogen-ion concentration of 0.0001 M?

*April 3, 2016*

**Chemistry**

If 210 mL of isopropyl alcohol is diluted with water to a total volume of 300 mL, what is the percent by volume of isopropyl alcohol in the solution? Would it be 70%??

*April 3, 2016*

**Chemistry**

I did I just wanted to make sure that it really was right. Thanks for the help.

*April 3, 2016*

**Chemistry**

I don't know, is 70% the answer??

*April 3, 2016*

**Chemistry**

I need help with this question, I don't know how to do it. If 210 mL of isopropyl alcohol is diluted with water to a total volume of 300 mL, what is the percent by volume of isopropyl alcohol in the solution?

*April 3, 2016*

**Accounting**

Chef Gourmet, Inc., has assembled the following data pertaining to its two most popular products. Blender Food Processor Direct material $ 18 $ 33 Direct labor 12 27 Manufacturing overhead @ $48 per machine hour 48 96 Cost if purchased from an outside supplier 60 114 Annual ...

*November 5, 2015*

**Math**

84-14=70

*September 8, 2015*

**Math**

A professional baseball team won 84 games. The team won 14 more games than it lost. There were no ties. How many games did the team lose?

*September 8, 2015*

**Business, Accounting**

A firm has a debt to equity ratio of 50%, debt of $300,000, and net income of $90,000. The return on equity is a. 60% b. 15% c. 30% d. not enough information

*February 25, 2015*

**Trigonometry**

Find these quantities: i. Find all angles in the unit circle with secx=2.1754 . Give your answers in radians to 4 decimal places. ii. Find sec(arcsin(2x))

*November 6, 2014*

**Trigonometry**

Suppose that Lance Armstrong1 is using a 180 mm chain ring and pedaling at a rate of 80 revolutions per minute. The wheels on his road bike have a diameter of 622mm. What diameter sprocket on the rear wheel does he need to maintain a speed of 30 kilometers per hour? In your ...

*November 6, 2014*

**Trigonometry**

A boy is twirling a model plane on a string that is 2 meters long. If he twirls the plane at 0.4 revolutions per second, how far does the plane travel in 5 minutes? Give your answer in meters to 2 decimal places.

*November 6, 2014*

**health/stats**

can cholesterol follow a normal distribution exactly? why or why not?

*October 17, 2014*

**Atmospheric Science**

1. What solar temp is needed for the peak intensity of radiation to occue at .2 micrometers? Remembering that humans can see light only between .4 and .7 microns, would the sun look brighter or dimmer at this new temp? 2. How much variation in earth orbital distance from the ...

*September 11, 2014*

**Stats**

You have many old textbooks in your apartment. You have 6 math books, 7 econ, and 4 accounting. Assume that each textbook is different than the other. A) What is the probability that the last book is one of the economic textbooks? B) What is the probability that none of the ...

*September 9, 2014*

**Science of the Atmosphere**

What is the temperature of air, given P= 90 kPA and the pressure is 1.0 kg(m^-3)? Thanks!

*September 7, 2014*

**Science of the Atmosphere**

What is the temperature of air, given P= 90 kPA and the pressure is 1.0 kg(m^-3)? Thanks!

*September 6, 2014*

**government**

If I am reading this right, it seems as if it's an opinion question. What is you favorite theory of government?

*September 6, 2014*

**Statistics**

Event A occurs with probability 0.1 and event B with probability 0.5 A) What is the maximum probability that the intersection of A and B can have? B) What is the minimum probability that the intersection of A and B can have? C) If it is know that P(A complement and B ...

*September 6, 2014*

**physics**

Any vector can be written as a unit vector multiplied by the magnitude of the vector (a positive scalar). Write each of the following vectors as the magnitude of the vector times the appropriate unit vector: < 0.00330, 0, -0.00330 >

*June 17, 2014*

**physics**

At a certain instant a ball passes location < 11, 10, -16 > m. In the next 3 seconds, the ball's average velocity is < -8, 37, 30 > m/s. At the end of this 3 second time interval, what is the height y of the ball?

*June 17, 2014*

**Calc**

Write a deferential equation describing the given situation. The rate at which the concentration of a drug in the bloodstream decreases is proportional to the concentration. Let Q(t) be the concentration of the drug at any time t and k be a positive constant. dQ/dt = ? THANKS!!!

*April 16, 2014*

**Persuasive Speech**

I am doing a speech on why my college should add more bus shelters to the bus stops. So far I have a few points about more students using buses so less pollution and protecting students from the elements, talking about how if they are dressed nice for a career fair or ...

*April 4, 2014*

**Speech- Statistic needed**

Does anyone know of any websites that have statistics on the number of people that volunteer for disaster relief in the us?

*March 24, 2014*

**Econ**

When considering economic growth, many policy makers focus on real GDP per capita since it takes into account the potentially distorting effects of ______________ and ________________. Any large, sustainable increase in real GDP must be the result of increased_____________. ...

*February 18, 2014*

**econ**

The International Disc Jockey\'s Union has a wage contract that stipulates a yearly wage increase based on the Consumer Price Index. If this year\'s wage is $25.00, the current CPI is 180, and the contract was first signed in the base year, what was the original salary...

*February 11, 2014*

**Econ**

1. When Joe started his job at the laundromat 5 years ago, his wage was $5.50 an hour. Today his wage is $8.50 an hour. If Joe started his job in the base year, and his real wage is the same as when he started, what is the Consumer Price Index today? 2. The International Disc ...

*February 11, 2014*

**math**

The figure is not posted

*February 11, 2014*

**Calc**

oh is it because it is the average?

*February 9, 2014*

**Calc**

Thanks! I get why you did every thing in the numerator but why did you have to divide by 256?

*February 9, 2014*

**Calc**

The temperature of a chemical reaction, t seconds after the reaction starts, is given by: T(t)= 20+5.25t^.75 degrees F , What is the average temperature during the whole process, if the reaction lasts for 4 minutes and 16 seconds ?

*February 9, 2014*

**Calc**

so is it. 3x - e^1? I am confused when you put in the 1

*February 9, 2014*

**Calc**

Consider the following: f(x)= the intergral of ((3-xe^x)/x )dx If the integration constant, C , is zero, then the value of f (1) is ????

*February 9, 2014*

**Calculus**

At a certain factory, output Q is related to inputs u and v by the equation Q= 17u^2+(16u+17v)/(u+v)^2 If the current levels of input are u= 10 and v = 25, use calculus to estimate the change in input v that should be made to offset a decrease of .7 unit in input u so that ...

*October 8, 2013*

**Calculus**

solve for dv/du dQ/du= 38u + [(u+v)^2(18+19dv/du) -(2(18u+19v)(u+v)(1+dv/du)]/ (u+v)^4 u=10 v=25 I am confused how u solve for the dv/du in this big equation and reducing and stuff like that thanks!! this is about implicit di

*October 7, 2013*

**Calc**

find the second derivative f(x)= 1/(4u^2-3)^2

*October 2, 2013*

**calculus**

Find the derivative... 1) f(u)= 1/ (2u^2-1)^2

*October 2, 2013*

**english**

who is the audience for the comic book are you my mother?

*September 18, 2013*

**English/Literature**

1. Identify the antecedents for the bolded pronouns for questions 1 + 2. The voters were worried about "their" money and "their" future. future money voters worried 2. The New Deal did not end the depression but "it" did lessen the financial ...

*August 20, 2013*

**business math**

$2664.2

*August 20, 2013*

**physical science**

The prefix kilo- means what?

*August 15, 2013*

**Government**

What are the 5 types of congressional power and give an example or each. my teacher said something about expressed, implied, denied, legislative, and non legislative but i am kinda confused on the examples.

*May 20, 2013*

**Math Help? Check my answers.**

1. You mix the letters: S E M I T R O P I C A and L thoroughly. Without looking you draw one letter. Find the probability that you select a vowel. From a fraction to simplest form. 12/5 5/12 1/3 7/12 2. You roll a standard cube once. Fine P(0) 7/6 1 1/2 0 3. This question is ...

*May 14, 2013*

**Biology**

What causes mutations in bacteria? and Can mutations affect plasmids?

*May 13, 2013*

**Precalc**

Find a formula for the nth term if... a)the 8th term is 8 and the 20th term is 44 b) the 8th term is 4 and the 18th term is -96 thanks!! I am just confused how you do this if you don't know what n is.

*May 12, 2013*

**precalc**

Let a subscript n be the remainder when n is divided by 5. a)find a subscript 11 and a subscript 400 b) if a subscript m =3, find a subscript (m +4)

*May 9, 2013*

**MATH HELP?!?!?!**

1. Maria has the following scores in her mathematics class: 86 75 97 58 94 and 58 a: Find the mean median and mode b: Should Maria's Mathematics class teacher use mean median or mode of the exam to convince Maria that she needs to study more regularly? 2. A researcher ...

*May 8, 2013*

**How do you submit your URL?**

Well, how can someone help me if they can't see the graph?

*May 8, 2013*

**How do you submit your URL?**

I'm trying to post a question. But they have graphs on them. But I can't submit the graph on the question because it doesn't allow it? Why is that.

*May 8, 2013*

**Pre Calc**

A plane (A) heading south at 120 mph and a plane (B) heading west at 600 mph are rlying tword the same point at the same altitude. Plane A is 100 miles from the point where the flight patterns intersect and plane B is 550 miles from there. A) Find the parametric equation that ...

*May 7, 2013*

**Pre Calc**

Alice throws a ball straight up with an initial speed of 40 feet per second from a height of 5 feet? a) Find parametric equations that model the motion of the ball as a function of time. b) How long is the ball in the air? c) When is the ball at its maximum height? Determine ...

*May 7, 2013*

**Pre calc**

Alice throws a ball straight up with an initial speed of 40 feet per second from a height of 5 feet? a) Find parametric equations that model the motion of the ball as a function of time. b) How long is the ball in the air? c) When is the ball at its maximum height? Determine ...

*May 6, 2013*

**Pre calc**

Write the equation in standard parabola form? x^2+ 4xy +4y^2 +5root5 y+ 5 = 0 Thanks so much!

*May 6, 2013*

**Pre calc**

Write the equation in standard parabola form? x^2+ 4xy +4y^2 +5root5 y+ 5 = 0

*May 5, 2013*

**Pre calc**

Write the equation in standard ellipse form and graph. 34 x^2 -24xy +41y^2 +41 y^2 -25= 0. i got x= (4 x prime- 3 y prime)/5 and y=(3x prime +4y prime)/5 but cant get the correct math when I plug that into the original equation. Also I need help finding the equation for x^2 +...

*May 5, 2013*

**Precalc**

For #1-3, an angle of rotation and ( x prime, y prime) coordinates are given. find the (x,y) coordinates? 1. angle= 30 degress, ( root 3, 2) 2. angle= 60 degrees, (-1,1) 3. angle = 45 degrees, ( root 2, - root2)

*April 30, 2013*

**Trig**

A parabola has its vertex on the graph of the line y=3x+1 and passes through (1,10). If it is the same size,? shape, and direction as the graph of y=3x^2, find the equation (s) of all possible parabolas Thanks!!!

*April 24, 2013*

**Pre calc**

A parabola has its vertex on the graph of the line y=3x+1 and passes through (1,10). If it is the same size,? shape, and direction as the graph of y=3x^2, find the equation (s) of all possible parabolas

*April 23, 2013*

**biology help**

Citrate Synthase, Mammalian Isocitrate dehydrogenase, E. Coli isocitrate dehydrogenase, alpha=ketoglutarate dehydrogenase Can you help me answer my question?

*April 16, 2013*

**Someone please help me with science?**

Anyone?

*April 16, 2013*

**Someone please help me with science?**

1. Which of the following shows the correct sequence of energy transformations when listening to the radio? electrical; kinetic; sound; kinetic; electrical electrical; sound; kinetic; sound; electrical sound; electrical; kinetic; electrical; sound kinetic; sound; electrical; ...

*April 16, 2013*

**chemistry**

Heat a known mass of a metal to a known temperature (say, for example, 10.00 g at 78.5 deg C) Add the metal to a known mass of water at a known temperature (say 75.00 g at 25.0 deg C) in a calorimeter. Let the metal and the water come to an equilibrium temperature, Tf. (The ...

*April 16, 2013*

**Literature Help?**

Which of the following sentences is correct? (1 point) At the slumber party, everybody were asleep after midnight. No one likes to be uncomfortable while sleeping. Each guest have a sleeping bag and a pillow.

*April 16, 2013*

**Literature**

Which of the following sentences is correct? (1 point) When the lions approach, the herd of buffalo run toward the river for safety. When the lions approach, the herd of buffalo runs toward the river for safety. When the lions approach, the herd of buffalo ran toward the ...

*April 15, 2013*

**Bio**

How do Schwann Cells initiate Myelination and is Myelination only initiated by these cells. Does anyone have any websites where i can find this information. I am confused on how it initiates it.

*April 15, 2013*

**econ**

Explain how supply and demand determine the price of the U.S. dollar on the international market.?

*April 13, 2013*

**Math**

Use implicit differentiation to dind dy/dx lny - x ln x = -1

*April 10, 2013*

**Math**

Find the absolute extrema of f(x)= (2x-1)e^(-x) on [0, 00)

*April 10, 2013*

**Pre calc**

Given the (x,y) coordinates of a point are (-1,-2) find 2 different (r, feta) coordinates? one with r > 0 and one with r< 0. a. Feta between zero and 2pie b. Feta between negative pie and pie c. Feta between 2pie and 4pie

*April 2, 2013*

**Econ- labor union members**

I am studying labor unions in my Econ class and would like to ask a member a few questions:) Which labor union do you belong to? How long have you been a member? What do you see as the advantages of belonging to a union? What are the disadvantages? Thanks!

*March 15, 2013*

**Precalc**

1. Find the exact value 3sin(invertangent (-1)) I got 0. Given 0<x<orequalto 1, determine the value of inversine (x) + inversetan (squareroot(1-x^2)/x) I really have no idea how to do that. I am trying to draw a diagram but cant figure it out. Thanks!

*February 11, 2013*

**Precalc**

1. Prove sin - cos +1/ sin + cos - 1 = sin +1/cos 2. 1+ sin/ 1- sin = (sec + tan)^2 Thanks!!

*February 4, 2013*

**precalc**

1. Write an equation of the following using the particular function. 1. The function is sine. The amp is 2 and the domain is [0, 2]. I got y=2sin(pie(x)) but i plugged that in my calc and it doesnt look like the graph on my worksheet 2. The function is cosine. The amp is 3 and...

*January 24, 2013*

**Precalc**

1. If a bicycle wheel has a diameter of 27 inches, find the radian measure of the angle through which the wheel turns as the bicycle travels a distance of one mile. thanks!!

*January 9, 2013*

**Precalc**

1. If a bicycle wheel has a diameter of 27 inches, find the radian measure of the angle through which the wheel turns as the bicycle travels a distance of one mile. thanks!!

*January 9, 2013*

**Precalc**

thanks so much both of you!! Yah I wasn't sure about the first one but now I know how to do both!! thanks!!

*December 20, 2012*

**Precalc**

1. Solve log (4x) = log (2) + log (x-1) the fact that this is x-1 and not + is really messing me up because i keep getting a negative number and that isnt possible 2. Solve: absolut value of(x^2 -4x-4) = 8 thanks so much!!! I have been studying and my final is tomorrow. these ...

*December 20, 2012*

**precalc**

1. if P(t)=3e^2t, for what value does P(t)= 2P(2) 2. Find all x for which the square root of log (x)= log square root of x thanks!!

*December 12, 2012*

**logarithms**

1. if P(t)=3e^2t, for what value does P(t)= 2P(2) 2. Find all x for which the square root of log (x)= log square root of x thanks!!

*December 12, 2012*

**Any Veternarian here that I can interview?**

I am doing a career report on the job of a vet and would like an interview as one of my sources. Is there any vet that would be willing to answer these three questions? 1.What are the educational and training requirements for this career? 2. What career training or degree does...

*December 2, 2012*

**Precalc**

oops it was 2^-x im confused why would you omit the bases?

*November 28, 2012*

**Precalc**

1. 1/3log base 8 of (x+1)=2log base 8 of 3-(2/3)log base 8 of (x+1) 2. 2^x+8 times 2^=x all over 2 = 3 3. if log base a of 3= x and log base a of 2 = y, find each of thefollowing in terms of x and y log base a (18a^3) thanks!!

*November 28, 2012*

**precalc help**

Find the exact value without a calc 1. log base 3 of 8 times log base 8 of 9. I started by changing both bases to 10 but don't know what to do from there. 2. e ^ log base e^2^9. I hope that isnt confusing. My teacher said we are suppose to get the bases all e, but how ...

*November 21, 2012*

**Precalc**

the thing is its / instead of - so I thought that I multiply each side by 10^-12 but im not sure

*November 19, 2012*

**Precalc**

how do you find x in 7-=log(x/10^-12)

*November 19, 2012*

**English**

what type of grief is keeping an item that reminds you of the dead person?

*November 19, 2012*

**English**

oops sorry holding onto something that was that person's who died, like a dog. Also would blaming people be under anger? Thanks for the sites?

*November 19, 2012*

**English**

In what stage of grief do people hold on to pets or objects that was their loved one who died? Thanks

*November 19, 2012*