Sunday
September 21, 2014

Posts by Joe


Total # Posts: 2,074

Calc 3
The actual span of the base of the dome is 143 feet. 1) Use cylindrical coordinates to write the surface of the dome as a function of the distance from the center of the base; that is find z = f (r) . 2) Use your function to find the height of the dome; that is what is f (0...
December 7, 2009

Pre Calc
Naturalists findthat the populations of some kinds of predatory animals vary periodically. Assume that the population of foxes in a certain forext vareis sinusoidally iwth time. REcord started being kept when time t = 0 years. A minimum number, 200 foxes, occurred when t = 2.9...
December 6, 2009

PreCalc
never mind
December 6, 2009

PreCalc
so what is the equation of the line??? h t t p : / / w w w . j i s k h a . c o m / d i s p l a y . c g i ? i d = 1 2 6 0 1 4 7 1 4 4 I understood this y = 120 + 8sin((pi)/35 - (5pi)/4)=120 were do i go from here THANKS!!!
December 6, 2009

Math
What does this notation mean =^-1 equal sign raised to negative one power
December 6, 2009

TOBOBPURSLEY
I thought phase shift was theta over omega correct??? and the period equals two pi over omega 40 min = (2pi)/omega omgea = pi/20 min phase shift = theta over omega phase sift = (20?)/pi min now you said phase shift was (35 pi)/40 I do not see why I appologize i made a spelling...
December 6, 2009

TOBOBPURSLEY
how do we now that the phase !@#$%^& is (35pi)/40 please explian THANKS
December 6, 2009

PreCalculus
I have a question I do not think anybody answered it Researches find a creature form an alienplanet. Its body temperature is varying sinusoidally with time. 35 min after they start timing, it reaches a high of 120 F. 20 min after that it reaches its next low, 104 F. How do I ...
December 6, 2009

PreCalculus
How do i find teh phase shift in this problem Naturalists find that the populations fo some kinds of predatory animals vary periodically. Assume that the population of foxes in a certain forest varies sinusoidally with time. Records started being kept when time t = 0 years. A ...
December 3, 2009

8th grade
how did the survivours of Krakatoa recieve help
December 3, 2009

FINANCE
go on th eenternet
December 3, 2009

Precalculus
tangent theta is equal to the derivative of sine theta over the derivative of cosine theta?
December 2, 2009

Precalculus
Sorry ok I was talking about on the unit circle how come the slope of the reference line (say if you were to angle pi/2, the reference line would be the positive y axis from y equals zero to y equals one, I think this line is called this, like if you were to draw pi/4 on the ...
December 2, 2009

PreCalculus
h t t p : / / w w w . j i s k h a . c o m / d i s p l a y . c g i ? i d = 1 2 5 9 7 1 4 6 2 0
December 1, 2009

PreCalculus
Ok I know that the slope of a straight line is the same thing as x with a dot aboce it or simply the first derivative of x on the unit circle tangent gives you the slope of the reference line right? This can be expressed using the notation expressed above but how? Thanks!
December 1, 2009

physics
On a cold winter day when the temperature is -20 degrees celsius, what is the amount of heat needed to warm internal body temp(37) the .5 L of air exchanged with each breath? Specific heat of air is 1020 J/(kg K) and that 1.0L air has a mass of 1.3g. Please help!! I dont know ...
November 30, 2009

Statistics (Probability)
I have a q
November 30, 2009

Psychology
its my friend, we both have the same problems and try to see if we can get helped
November 28, 2009

Psychology
Could someone see if I got any of the questions wrong. I feel that some questions have multiple answers but there is only one that is correct. Please help. thanks a lot State whether each scenario is an example of assimilation or accommodation. 1. A child has always used a ...
November 28, 2009

4th grade
4th grader asks how to solve 8100/?=90
November 19, 2009

chemistry
a resting person requires 14.5 L of O2 per hour to maintain metabolic activities. Such a person breathes in 0.50 L of air at approximately 20 degrees C with each breath. The inhaled air is 20.9%O2 while the exhaled air is 16.3% O2. (a) how many breaths per minute does a ...
November 19, 2009

math
1/n^2=0.0278
November 16, 2009

Networking
Jack is setting up a new FTP server that is running the Windows XP operating system. This FTP server will be shared by seven different corporate departments, each identified by a user group, but access is to be restricted by department. The Domain Administrators, Departmental ...
November 15, 2009

Calc
A common inhabitant of human intestines is the bacterium Escherichia coli. A cell of this bacterium in a nutrient-broth medium divides into two cells every 20 minutes. The initial population of a culture is 59 cells. (The tolerance is 1% unless your instructor states otherwise...
November 8, 2009

algebra
A wholesaler mixed coffee beans worth $6/kg with another kind worth $8.80/kg. The 16kg mixture was worth $6.70/kg. How many kilograms of each type was used?
November 7, 2009

5th grade Language
1.i and 5 2.named and blaze 3.was and once 4.wouldn't and out 5.first and filly 6.hoarse and croaked
November 5, 2009

Physics
Projectile motion equation: y=xtan(è)-(gx^2)/[2(ucos(è))^2] where è=39.5 deg., u -34.9 met/sec & g=9.8 met/sec^2. On substitution and solving for y=0, you can get the horizontal range as 122.003 met. and thus the time required would be = 122.003/(ucos(&...
November 5, 2009

English
i think you sohould either try and find online video interviews of this per, and as cheesy as its sounds imagen you are teh one asking the questions and tehy are responding to you then give your opinions on their answers. ps if you cannot find someone with online videos ...
November 5, 2009

math
it depends on the amount of ppl who would win and
November 5, 2009

math
it depends on the amount of ppl who would win
November 5, 2009

Chemistry
your teacher should give you a chart with which elements are soluble and insoluble
November 3, 2009

tutor period
what is a blog and how do you write one
November 1, 2009

albebra
c=2*3.14sqare root
October 29, 2009

College mechanic vibration
Estimate and discuss the maximum bouncing and pitching generated by your design when the car travels at 40 km/hr over a rugged terrain roughly modeled by a sine wave with 0.10 meter amplitude and 4.0 meter period. (This one does not have to be an accurate calculation. State ...
October 25, 2009

math
thanks :) that helped
October 22, 2009

math
Give the Five-Number Summary for this data set. Round your answers to the nearest tenth. 18, 22, 36, 36, 36, 44, 185, 304, 24
October 22, 2009

graphic design
the purpose of an art is to provide visual appeal. true or false
October 22, 2009

social studies
what is the geography of the great barrier reef
October 22, 2009

7th grade
What did the spanish farmer say to his chicken
October 21, 2009

Calc
This is a very confusing problem for me y = 5^3^x^2 Find y'
October 21, 2009

Probability
Given additional information that 56% of the total employees in the company are male and 50% of them are employees who have been working less than 5 years. If an employee selected at random is known to have been working for 5 years or more, what is the probability that the ...
October 20, 2009

Physics
no idea all HELP appreciated!! A shot-putter puts a shot (weight = 70.3 N) that leaves his hand at distance of 1.45 m above the ground. (a) Find the work done by the gravitation force when the shot has risen to a height of 2.15 m above the ground. Include the correct sign for ...
October 19, 2009

science
you push yoursef on a skateboard with the force o 30n and the accelerate at 0,5m/s2 find the mass of you and the skateboard together
October 19, 2009

science
find the force exerted by z rope on a 10kg mass that is hanging from the rope
October 19, 2009

accounting
preent in journal form adjusting entries that would be made on july 31,2011 the end of the fiscal year 1. apr 30, a ten month 9% note for $20,000 was received from a customer
October 16, 2009

Computers
I have a question. What should you set your margins to if you want to print out your notes and glue them to a 3 x 5 notecard?
October 16, 2009

Math
Out of the numbers divisible by 3, we picked 4 consecutive numbers. To the sum of these, we added a third of the sum, and then the half of the third of the sum. We got 225. What are those 4 numbers?
October 15, 2009

math
So, if a problem says to use the subtraction property of equality to solve an equation.. and an equation is w + 1 = 14 what am I supposed to do?
October 14, 2009

math
can someone explain what Subtraction property of equality is? I don't understand it.
October 14, 2009

chemistry
3.1x1024 atoms of He into moles?
October 14, 2009

operating system
If /home/jenny/draft and /home/alex/letter are links to the same file and the following sequence of events occurs, what will be the date in the opening of the letter? a. Alex gives the command vim letter. b. Jenny gives the command vim draft. c. Jenny changes the date in the ...
October 14, 2009

Math
The sum of a number and three times the number is 48. What is the number?
October 13, 2009

pysics.
What is the minimum work needed to push a 975 kg car 230 m up along a 17.5° incline? Assume the effective coefficient of friction retarding the car is 0.20?
October 12, 2009

Maths
thankyou so much for your help I am vey grateful, I felt you could do every value but wasn't sure if I was missing something.
October 10, 2009

Maths
which amount up to £1 cannot be paid exactly with fewer than 6 coins? is this a trick question and can all the amounts be paid?! I am really struggling with this one
October 10, 2009

math 8th grade
find 72% of 200 and i need to show work
October 5, 2009

Chem
What volume of NO measured at 1.1 atm and 1100 C, can be produced from 10.0 L of NH3 and excess O2 measured at the same temperature and pressure? Here is the balance equation 4NH3+3O2+4NO+6H20 So far this is what I have: (1.1 atm)(10.0L) __________________=.097mol NH3 .08201 x...
October 5, 2009

literature
What is the setting and the mood for the book...The View from the Cherry Tree?
October 4, 2009

Literature
Give two examples of foreshadowing from the book The View from the Cherry Tree.
October 4, 2009

math
What do you do if 3=x and equals to y? (y is 1 with 123987 zeroes?
October 1, 2009

statistics
A simple random sample of 25 has been collected from a normally distributed population for which it is know that o=17.0. The sample mean has been calculated as 342.0, and the sample standard deviation is s=14.9. Construct and interpret the 95% and 99% confidence intervals for ...
September 30, 2009

Calc
Find the limit. lim_(x->infinity)(sqrt(9 x^2 + x) - 3 x)
September 29, 2009

humanities
What are some example of "self-making" and race, class, or gender, in "Satchmo: My Life in New Orleans"? self-making is when the author tells about oneself and is making up a story about what and who they are and what they've done. any more examples of ...
September 29, 2009

math
use a commutative law to find an equivalent expression pq. an equivalent expression pq is= subtract the following -9(-3)=
September 27, 2009

Math
divide if possible -28/14 select the correct choice below & fill in any answer boxes in your choice. a. -28/14= b.the answer is underfined
September 27, 2009

calculus HELP
how do you find the domain of the function:: 14/(x^2 - 361) <-- this is all under a square root.. i have attempted this so many times and have not found the correct answer yet. how do i solve the domain when it is a square root function with a denominator???? please help! ...
September 26, 2009

physics
-121.88
September 21, 2009

Calc
I am having trouble with these two problems for my Calc class. I have tried answering a few times already, but i keep getting it wrong. Help please and thank you. For the limit below, find values of δ that correspond to the ε values. lim_(x->1)(3 + x - 3x^3) = 1...
September 21, 2009

gr.10 mathh!
What are the factors of 1000
September 19, 2009

science
(A rectangular brick measurses 6cm by 9cm by 20 cm and has a mass of 2.563 kilograms.) What is the brick's surface area in square centimeters, and square centimeters?
September 16, 2009

science
(A rectangular brick measurses 6cm by 9cm by 20 cm and has a mass of 2.563 kilograms.) What is the brick's surface area in square centimeters, and square centimeters?
September 16, 2009

us history
in what year was each of the 13 colonies found and by who?
September 14, 2009

social studies
what city is 36 degrees north latitude and 90 degrees west longitude
September 8, 2009

calc
It would be great to see how this is done. The prof's way of doing it is way confusing and intricate and I just started learning integrals.
September 8, 2009

calc
Air resistance acting on a falling body can be taken into account by the approximate relation for the acceleration: a=dv/dt=g-kv where k is constnat Derive a formula for the velocity of the body as a function of time assuming it starts from rest (v=0 at t=0) v=?
September 8, 2009

SOCIAL STUDIES
what are 4 effects of magnetic compasses in the 1200s?
September 6, 2009

english
i have to make a poster using the following words: main idea, theme, generalization. i have to give the defintion and give examples. any suggestion how to do it. thanks
September 6, 2009

math
45?
September 5, 2009

math
what's the LCM of 9 and 15? I got 9 is that the correct answer?
September 5, 2009

macro economics
Using a Circular Flow diagram as a reference, describe how changes in one of the sectors of an economy will influence aggregate supply and demand.
September 2, 2009

Grapes of Wrath
make it rain
August 17, 2009

4th grade
no one knows its easy
August 13, 2009

english Midnight's Children
In Midnight's Children by Salman Rushdie, which character is morally ambiguous? morally ambiguous= character whose behavior discourages readers from identifying them as purely evil or purely good
July 25, 2009

trig
how do you find the limits of : lim sinx/x where x->0 and lim 1/x-3 where x-> 3
July 25, 2009

Algebra
Thank you Reiny so then when ever they are asking something similar like this question I always mult. then? or it depends on what the question is asking me for. Joe
July 23, 2009

Algebra
can some one please help me
July 23, 2009

Algebra
a bag contains 13 marbles of which 10 are red. A marble is selected at random and replaced. A second marble is then selected at random. What is the probability that both marbles are red?
July 23, 2009

math
solve the system of equation by graphing then classify the system as consistent or inconsistent and as dependent or independent 8x-4y= -20 4y-8x= 20 i don't understand it.
July 22, 2009

math
so for x = 5 that's the answer i got.
July 21, 2009

math
solve by the substitution method. 5x + 7y= -19 x=4-4y what is the solution of the system?
July 21, 2009

math
simplify 1[92-(-70-78)]
July 21, 2009

sociology
What, if anything, do these reverse migrants lose by returning to the South?
July 21, 2009

math
i think you have the wrong joe
July 21, 2009

math
decide whether the pair of lines is parallel, pependicular, or neither 3x+2y=2 2x-3y=8
July 21, 2009

sociology
How much change has taken place in the racial attitudes of white Southerners in recent decades? What are the primary factors that have produced this changes?
July 21, 2009

sociology
What, if anything, do these reverse migrants lose by returning to the South?
July 21, 2009

sociology
What suggestions would be offer to bridge the digital divide that separates some seniors from others in computer usage? Consider enterprises that are both profit and nonprfit
July 21, 2009

sociology
What do sociologists suggest that will enhance or deter your computer literacy at that stage of life at the golden age of 65?
July 21, 2009

sociology
How would a symbolic interactionist respond to television and music producers who say that they only giving the public what the public wants?
July 21, 2009

sociology
How do these themes about male roles appear in the television and movies watch? What messages do these themes provide for men and women about masculinity and femininity?
July 21, 2009

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