Wednesday
February 10, 2016

# Posts by KEVIN

Total # Posts: 1,090

AP Biology
Plants have three basic organs, roots stems and leaves. Describe in detail the types of cells and tissue involved with each organ and their function in transport mechanisms in plants.
June 27, 2010

Chemistry
Just to confirm, the answer is 2.004748935 x 10^-5, right?
June 15, 2010

trigonometry
A construction worker working at 300 feet from the ground, drops a nail onto the ground below. The function, s(t) = -4.9t2 + 300, gives the height (in meters) of the object as it falls to the ground. The velocity at time t = 3 seconds is given by lim(t->3) s(3)- s(t)/ 3-t. ...
June 8, 2010

trigonometry
A construction worker working at 300 feet from the ground, drops a nail onto the ground below. The function, s(t) = -4.9t2 + 300, gives the height (in meters) of the object as it falls to the ground. The velocity at time t = 3 seconds is given by lim(t->3) s(3)- s(t)/ 3-t. ...
June 8, 2010

Probability
1) What is the probability of tossing 6 coins and getting at least two tails? 2) Suppose you flip a penny, a nickel,a dime and a quarter. What is the probability of getting heads on the penny and nickel and dime and tails on the quarter? Please show steps for the solutions. ...
June 4, 2010

Algebra
Joleen is a sales associate in a clothing store. Each week she earns \$250 plus a commission equal to 3% of her sales. This week her goal is to earn no less than \$460. Write and solve an inequality to find the dollar amount of the sales she must have to reach her goal.
June 3, 2010

STATISTICS
a. Probability of drawing a white ball is 10(number of white balls)/ 30 (total number of balls) since the balls are replaced, the probability remains the same for the second ball, that is 10/30. To determine probability of drawing balls with replacement is found by multiplying...
June 2, 2010

math
solve in terms of r:s=a/1-r
May 31, 2010

physics
with sig figs: 1,000,000
May 13, 2010

Electronic Instrumentation
I'm having trouble finding Q2. -5.2 x 10^19 x 6.2 x 10 ^18?
May 11, 2010

Electronic Instrumentation
Calculate the force in Newtons that exists between a positive charge of 2C and a negative charge of 5.2 X 10^19 electrons separated by a distance of 25 cm.
May 11, 2010

Calc
f(x,y,z) = y; W is the region bounded by the plane x+y+z=2;cylinder x^2+z^2=1. and y=0. What I have set up isL 4 int(0 to 1) int(0 to sqrt(1-x^2)) int(0 to 1-x-y) y dydzdx. But solving this is pretty cumbersome. Any other ideas?
May 9, 2010

Chemistry
The hydrogen in an eudiometer has a volume of 80 ml when the pressure is 740 mm. what's its volume at standard pressure?
May 6, 2010

algebra 3
what statement best describes the function f(x)=2x^3+2x^2-x?
May 6, 2010

six coins are dropped on the floor. find the probability that they will all land heads up.
May 6, 2010

Chemistry - Molecular orbital Config
So when asked to draw the molecular orbital configuration, you draw the orbital configurations for each element in the compound while doing something with the pi and sigma bonds?
May 1, 2010

Chemistry - Molecular orbital Config
I'm having trouble with this problem on my homework, We are supposed to write the molecular orbital config for a molecule. Could someone walk me through the process of how to do this and I'll see if I can get the hang of it? What I have to draw is a diatomic molecule. ...
May 1, 2010

Econ
How do i explain the change of evolution of financial markets over the past 2 years? i feel like what i have now is just a simple breakdown of how the crisis happened. any advice?
April 29, 2010

ALGEBRA
alright. the first one would be easiest if you multiplied out the numbers before the parenthesiss into the numbers inside. so itll look like 50=3r+48-2r+4.the u can simplify the right side and get 50=r+52. subtract 52 from both sides and your answer is r=-2 the second one ...
April 28, 2010

algebta 2
To find the nth term of an arithmetic sequence the formula given is a(sub n) = a (sub 1) + (n-1)d. Why is (n-1) a part of the formula? Why isn't just n?
April 27, 2010

chem 1406
now you just multiply them. the number you had before was right just not the whole cancelling out stuff.
April 27, 2010

chem 1406
you had it set up right before. ur messing up the algebra. you were solving for the x kj so in order to do that you would have to multiply both sides by the 2000 moles. the moles and 200o would cancel on one side and just the moles on the other. but your number is correct. if ...
April 27, 2010

chem 1406
you shouldve got a bigger answer and ur solving for the kj not kj/mol. remember you have to multiply the 2000 moles by the 4130 kj/mol to get rid of the mole.
April 27, 2010

Chemistry
you have to keep in mind its asking for the greatest increase ionization energy when the between the removal of the first and second electron. That is basically saying it will lose 1 electron no problem but the second one would be a lot harder. therefore you would have to look...
April 27, 2010

another college chem
sry we have not gotten that far yet. wish i could help
April 27, 2010

Math
theres 2 different methods u could do. u could solve for either x or y in one of the equations and replace the one you solved for. thatd be the easiest with those numbers
April 26, 2010

College chemistry
you have to convert it from joules to calories and idk that off hand but other then that it looks good so far
April 26, 2010

College chemistry
specific heat of h2o is 4.184
April 26, 2010

College chemistry
it makes sense too because if you think about it you are making a 5.0 L solution and 191.20 mL isnt even 1/5 of a liter
April 26, 2010

College chemistry
use the equation drbob222 gave you before. its the right one. you may have to convert the 5 L to mL first though for it to work or understand that ur answer is in L and convert it. one or the other
April 26, 2010

Chemistry
if im missing any info plz tell me ill get back to it asap. it was put in a styrofoam cupand the temperature of the solution was measured directly if that helps at all. i just need to know i guess whether or not im treating the data as a coffee cup calorimeter or doing ...
April 26, 2010

Chemistry
g+ 2HCl-->MgCl2+H2 The mass of the HCl is 24.852 g mass of the Mg is .990 g and the mass of the calorimeter is 3.711 g. the change in temperature of the solution was +19 degrees celcius. itd be great if i could just get a basic equation to use or something i can do the ...
April 26, 2010

geometry
the first thing that you need to do is solve for x. The sum of the interior angles inside a pentagon is equal to 540 degrees. you come up with the equation 2x+6x+4x-6+2x-16+6x+2=540. Then you want to simplify it down to 20x-20=540. there are multiple ways you can finish this ...
April 26, 2010

Chemistry
opps i suppose i forgot to give the temperature change and it was a +19 degrees celcius
April 26, 2010

Chemistry
Mg+ 2HCl-->MgCl2+H2 The mass of the HCl is 24.852 g mass of the Mg is .990 g and the mass of the calorimeter is 3.711 g. How do I calculate the heat of the reaction of all this please?
April 26, 2010

trig
you have to use the law of sines which a/sinA=b/sin B=c/ sin C where the top letter is the opposite side of the angle and the lower letter is the angle itself. first you would go about solving this for angle B by putting 12/sin 76=4/ sin B. doing simple algebra the equation ...
April 26, 2010

algebra 2
is that exactly how it is showed or is there a log base? normally that means theres a log base 10 and if that is the case the answer is 10^3.2. in a more general sense x=b^y and putting it in terms of y the equation is y=logbx were b is subscripted i just dont know how to do ...
April 26, 2010

Math
What's the difference between sample space and event in a lottery game (where 50 numbers are drawn and you have to guess/pick six numbers?). Can you give examples of both?
April 19, 2010

economics
How is the demand curve for an item that is very responsive to price changes likely to be different from that of an item whose demand is not very responsive?
April 19, 2010

EGYPT
bobpursley what are some of the conflicts the website doesn't work
April 15, 2010

EGYPT
I NEED TO KNOW ABOUT EGYPT THESE ARE THE QUESTIONS THAT I HAVE TO ANSWER: -IS THERE RURAL AREAS -IS THERE ANY CONFLICT(RELIGIOUS,SLAVERY ETC.) -IS THERE ANY POLUTION THAT'S ALL THANK U
April 15, 2010

trig
prove the trig identity cos(4x) = 2-sec^2(2x)/sec^2(2x)
April 14, 2010

Kara has a diamond ring. Her ring has a volume of 6cm(to the third power) and a mass of 2g. What is the density of her ring? INCLUDE UNITS!
April 6, 2010

Pre Calculus
The electricity in your house is alternating current because the current varies sinusoidally with time. The frequency of sinusoid is 60 cycles per second. Suppose at Time = 0 seconds the current is at its max of 5 amperes. Write an equation expressing current in terms of time
March 30, 2010

math
The mean score on a Math exam was 50% and the standard deviation was 10%. Assume the results were normally distributed. (a) What percent of students earned a score between 50% and 70%? (b) If 60 students took the exam, how many got a score between 50% and 70%?
March 28, 2010

math
Explain how to evaluate x-8 when x=10?
March 25, 2010

math
five names for -73
March 23, 2010

Math
Is anyone familiar with base ten? I need to show my work on how I recieved my answer. Write the numeral in base ten. 200six =532
March 21, 2010

algebra
A wheel makes 4 17/20 revolutions per minute. If it rotates for 48 minutes,how many revolutions does it make?
March 20, 2010

social
Ok, I think both of these are syndicated but im so confused! The type of programming aired by a station with which they "affiliate" is called A) syndicated programming B) local origination C) network programming D) non of the above This type of programming, produced ...
March 14, 2010

social
Ok, I think both of these are syndicated but im so confused! The type of programming aired by a station with which they "affiliate" is called A) syndicated programming B) local origination C) network programming D) non of the above This type of programming, produced ...
March 14, 2010

social
The "jack fm" format is an attempt to stimulate the random programming of an ipod on shuffle. True or False I'm really not sure what it is.
March 14, 2010

social
i agree with the first one, but why would the second one be false? when somethings head to head wouldnt it be 2 programs battling and 1 trying to be successful?
March 14, 2010

social
Never mind I'm not sure thats why i asked, how about the other question i think thats false do you?
March 14, 2010

social
unique as in do they have a competitor
March 14, 2010

social
Are both these false? A unique format is one for which there is no similar competition in the market. A) True B) False I also think this one is false but again not sure A "head to head" format refers to a format that is trying to successfully program against a ...
March 14, 2010

social
Are both of these false A unique format is one for which there is no similar competition in the market. A) True B) False I also think this one is false but again not sure A "head to head" format refers to a format that is trying to successfully program against a ...
March 14, 2010

social
Can you help me please, i think it is false but im not sure A unique format is one for which there is no similar competition in the market. A) True B) False I also think this one is false but again not sure A "head to head" format refers to a format that is trying to...
March 14, 2010

Social Studies
Thank you so is the first one true as well?
March 14, 2010

Social Studies
Is this true or false: The radio business and the record business are interdependent; they have strong ties between them. i think its true and also is this true or false Radio programming can derive from locally produced, syndicated or network programming. A) True B) False
March 14, 2010

math
A TV reporter said that twice as many woodlands were lost this year to fire than in the preceding year. He claimed this was an increase of 200%. Was he correct?
March 11, 2010

Determinants
Why are finding determinants important? Aside from Cramer's rule when are determinants used?
March 11, 2010

Math
Write 0.36 as a fraction.
March 10, 2010

math
a girl flipped a coin 4 times, what is the probability that she gets 3 heads and 1 tails? Using a tree diagram
March 7, 2010

Math
Hey buddy, i'm pretty sure this is against the rules. just so you know, its unlikely that you'll get much help from this site. i think you should use a different site if you want help...the census, just a thought. best of luck to you, i can already tell you are going ...
March 6, 2010

Finance
What is the current yield of a annual coupon bond with a 6% coupon, four years until maturity, and a price of \$750?
March 5, 2010

Math
A standard train ticket in a certain city costs \$2.50 per ride. People who use the train also have the option of purchasing a frequent-rider pass for \$18.00 each month. With the pass, a ticket costs only\$1.75 per ride. How many train rides in a month make the frequent-rider ...
March 2, 2010

Math
Solve and graph the solution set on a number line. |5x + 7| - 2 < 4 <------------------------> -5 -4 -3 -2 -1 0 1 2 3 4
March 2, 2010

Algebra 2
Solve each equation: (x^2-3)(x^2+3x-4)=0 (x+2/3)(x^2+5x+1)=0 x^3-2x^2+x=0 x^3+3x^2-5x-4=0
March 1, 2010

Global History
How did military motivies contribute to imperialism? and why did missionaries support imperialism?
February 16, 2010

Global History
How was Nationalism a cause of imperialism? and what was gained economically through imperialism?
February 16, 2010

Math
How do I make 2/30 into a percent? I don't need answer only need to know how to solve.
February 11, 2010

Math
I am suppose to write 2/30 as a percent. My answer choices are a .o6%, b. .005% c. .6% d. .05% I thought I would divide 2 into 30 which would be .06 and then moving 2 spaces to the right equaling 6%. How do I solve this problem.
February 11, 2010

Math
How would you work this... You are facing north. You turn 270 degrees counterclockwise. Which direction are you facing? Is it West? You start out at 90 and go from there? I don't know...
February 10, 2010

math
Suppose the cost C(q) (in dollars) of producing a quantity q of a product equals C(q) = 500 + 2q +1/5q^2 The marginal cost M(q) equals the instantaneous rate of change of the total cost. Find the marginal cost when a quantity of 10 items are being produced.
February 8, 2010

math
Solve the inequality x^2 + 7x + 12 < 0.
February 8, 2010

math
Find the domain of g(t) = sqrt (3t + 15.)
February 8, 2010

math
If f(x) = 3x + 9 and g(x) = −x2, then find f(g(1)).
February 8, 2010

Physics
A 90 kg halfback runs north and is tackled by a 120 kg opponent running south at 4 m/s. The collision is perfectly inelastic. Just after the tackle, both players move at a velocity of 2 m/s north. Calculate the velocity of the 90 kg player just before the tackle. a.) 3 m/s ...
February 6, 2010

physics
The coefficient of static friction between the tires of a car and a horizontal road is 0.515. As the car brakes, what is the magnitude of the maximum acceleration of the car? Assume the net force on the car is the maximum static friction force.
February 5, 2010

Chemistry
Write the mechanism for (E)-2-5-dimethyl-hex-3-ene and bromine? Assign the R, S configuration for each of the products and determine the stereochemical relationship of each set of products. I think the products will be trans but I am not quite sure how the mechanism work. Any ...
February 2, 2010

math
Why exactally does the absolute value of -3+4i = 5. I know (-3) squared plus (4i) squared = 5? Could you include a graphic approach as well? Thank you.
February 2, 2010

Chemistry
Using the balanced reaction, enter the formula, charge(if any), and state of the species (exclude H2O) in solution if Ba(NO3)2(aq) reactant is present in stoichiometric excess. Separate your answers by comma. NaCl(aq) + Ba(NO3)2(aq) → NR
January 29, 2010

Microbiology affects a person on a daily basis because it starts from the things that we do to the things that we don't. Such as when we take Omega 3 Fish Oil Supplements, the oils, and the vitamins from within, helps us daily, without us even knowing about it. Or when we ...
January 27, 2010

Organic chemistry
Is m-nitroaniline soluble in water, 1.0M NaOH, 1.0M HCl?
January 24, 2010

Organic chemistry
is benzoic acid soluble in water, 1.0M NaOH, 1.0M HCl?
January 24, 2010

Trig
Thanks for letting me know about wave seperation. Could you tell me more please. What exactally is meant by wave seperation. Does it mean above and below the midline or does it mean seperation between wave cycles? What does it mean?
January 22, 2010

Trig
in the equation y=acos b(x-h)+k, what exactally does b represent. How is it helpful?
January 22, 2010

Trig
In the equation y=4cos 6x, what does 6 represent? In general for the equation y-acosbx, what does b represent?
January 22, 2010

chemistry
Predict the Products for the following reactions and write the chemical equation. Combustion: Liquid Octane, C8H18 burn in oxygen gas. how would you set this up and predict the product? Thnx in advance whoever figures it out :)
January 21, 2010

Chemistry
"A sample of a nonpolar molecules capable of only dispersion forces can have a higher boiling point the a sample of a polar molecules capable of hydrogen bonding. This statement can only be true if the formula weight of nonpolar molecule(the answers are =,<, or >)...
January 18, 2010

Bible
I believe the 1st question is number 2. & the 2nd question is number 3. Can anyone confirm this. Thanks.
January 11, 2010

Bible
I need help with these two questions please. I cannot figure out what goes with what. Thanks. The orderly design and purpose of nature which verifies a divine intelligence is a(n) ? argument. Choises: 1. teleological 2. cosmological 3. anthropological The analogy between man ...
January 11, 2010

Bible
I don't know which one of these fits the blank. Can someone please help? The law of cause-and-effect which verifies a divine power is a(n) ? argument. Choises: 1. teleological 2. cosmological 3. anthropological
January 11, 2010

Algebra
A rectangle is 20 inches tall it's area is 260 inches what is the width
January 10, 2010

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