Monday
December 22, 2014

Posts by rebekah


Total # Posts: 458

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 dont 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

7TH GRADE SCIENCE?!?!
For the 1st one I got C. sound electrical kinetic electrical and for the second 5.3 quads. Is that right?
April 16, 2013

7TH GRADE 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

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 confussed 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 dont 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 because ...
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

Check my precalc
what is the f inverse of f(x)= ln(x-3) I got y= e^x - 4 Solve 8 times 10^(2x-7)=3 I do not know how to do this. Do i get 8 and 10 with the same base? How? Thanks!
November 18, 2012

Finance
An important source of temporary cash is trade credit, which does not actually bring in cash, but instead slows its outflow. Vendors often provide discounts for early payment. What is the formula to determine the effective interest rate if the discount is not utilized?
November 17, 2012

Finance
Your firm is considering the following three alternative bank loans for $1,000,000: a) 10 percent loan paid at year end with no compensating balance b) 9 percent loan paid at year end with a 20 percent compensating balance c) 6 percent loan that is discounted with a 20 percent...
November 17, 2012

Finance
Community Hospital has annual net patient revenues of $150 million. At the present time, payments received by the hospital are not deposited for six days on average. The hospital is exploring a lockbox arrangement that promises to cut the six days to one day. If these funds ...
November 17, 2012

Finance
St. Luke’s Convalescent Center has $200,000 in surplus funds that it wishes to invest in marketable securities. If transaction costs to buy and sell the securities are $2,200 and the securities will be held for three months, what required annual yield must be earned ...
November 17, 2012

Check my precalc
1. find without a calc log base 5 of cubed root of 25. I got x=(2/3) 2. ln base e of 3 I got 3 3. find the domain of y= log base 3 of (x/x-1) I got (negative infinity, 0)union (1, infinity) 4. y= (1/ln x) find the domain i got ( negative infinity, 1) but im pretty sure thats ...
November 15, 2012

Adv Comp
I am doing a paper on symbolism in the book, The Accidental tourist by Anne Tyler, specifically about the chair with wings and the dog. I need to find online sources of people that critic the book or talk about these symbols. They have to be credible sources. At the moment I ...
November 11, 2012

chem- i reallyneed help
so is it - 764.2?
November 6, 2012

chem urgent!
the h2o is ÄH°f = -285.8 kJ/mol
November 6, 2012

check my precalc
thanks are all the others correct?
November 1, 2012

check my precalc
Rewrite each of the following as a product of linear factors 1. x^2+3 My Answer: (x+iroot 3)(x-iroot3) 2. x^2-2x+3 MA: (x-(1+iroot2))(x-(1-iroot2)) 3. x^4+x MA: IM not sure how to do it! can you help? 4. x^5-x^4+5x^3 MA: x^3(x-(1+iroot19/2))(x-(1-iroot19/2)) 5. 3x^2+7 MA: NOT ...
November 1, 2012

chem
Calculate the amount of heat transferred when 2.06 g of Mg(s) reacts at constant pressure. 2 Mg(s) + O2(g) ¨ 2 MgO(s) ƒ¢H = -1204 kJ
November 1, 2012

Adv Comp
I need help coming up with a title for a review on the documentary Wordplay. I wrote about how the documentary give a lot of great information, but lacks a compelling plot throughout. I really wanted to make the title interesting by adding actual wordplay into it, but I can&#...
October 30, 2012

Factoring
thanks so much!!
October 30, 2012

Factoring
2x^2+3x-7 i cant find a zero to use synthetic division with this. They dont work. What am I doing wrong? Thanks!
October 30, 2012

chem
when is i8t ok to use M1V1=M2V2?
October 30, 2012

Factoring- precalc
im stuck on factoring (x-1)(2x^3+13x^2+8x-35) do i use synthetic division? if so what zero? thnks.
October 29, 2012

Precalc factoring
im stuck on factoring (x-1)(2x^3+13x^2+8x-35) do i use synthetic division? if so what zero? thnks.
October 29, 2012

chem
Because the oxide ion is basic, metal oxides react readily with acids. (a) Write the net ionic equation for the following reaction. (Use the lowest possible coefficients. Include states-of-matter under SATP conditions in your answer.) FeO(s) + 2 HClO4(aq) Fe(ClO4)2(aq) + H2O(l...
October 29, 2012

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