# Posts by Kevin

Total # Posts: 1,287

**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...

**math**

solve in terms of r:s=a/1-r

**physics**

with sig figs: 1,000,000

**Electronic Instrumentation**

I'm having trouble finding Q2. -5.2 x 10^19 x 6.2 x 10 ^18?

**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.

**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?

**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?

**algebra 3**

what statement best describes the function f(x)=2x^3+2x^2-x?

**7th grade**

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

**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?

**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. ...

**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?

**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 ...

**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?

**chemistry**

60.8

**chem 1406**

now you just multiply them. the number you had before was right just not the whole cancelling out stuff.

**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 ...

**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.

**chem 1406**

yep

**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...

**Math Probability**

yes

**another college chem**

sry we have not gotten that far yet. wish i could help

**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

**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

**College chemistry**

specific heat of h2o is 4.184

**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

**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

**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 ...

**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 ...

**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 ...

**Chemistry**

opps i suppose i forgot to give the temperature change and it was a +19 degrees celcius

**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?

**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 ...

**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 don't know how to...

**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?

**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?

**EGYPT**

bobpursley what are some of the conflicts the website doesn't work

**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

**trig**

prove the trig identity cos(4x) = 2-sec^2(2x)/sec^2(2x)

**6th grade**

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!

**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

**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%?

**math**

Explain how to evaluate x-8 when x=10?

**math**

five names for -73

**Math**

Is anyone familiar with base ten? I need to show my work on how I received my answer. Write the numeral in base ten. 200six =532

**algebra**

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

**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 ...

**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 ...

**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.

**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?

**social**

Never mind I'm not sure that's why i asked, how about the other question i think that's false do you?

**social**

unique as in do they have a competitor

**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 ...

**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 ...

**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...

**Social Studies**

Thank you so is the first one true as well?

**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

**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?

**Determinants**

Why are finding determinants important? Aside from Cramer's rule when are determinants used?

**Math**

Write 0.36 as a fraction.

**math**

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

**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 ...

**Finance**

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

**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 ...

**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

**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

**Global History**

How did military motivies contribute to imperialism? and why did missionaries support imperialism?

**Global History**

How was Nationalism a cause of imperialism? and what was gained economically through imperialism?

**Math**

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

**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.

**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...

**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.

**math**

Solve the inequality x^2 + 7x + 12 < 0.

**math**

Find the domain of g(t) = sqrt (3t + 15.)

**math**

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

**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 ...

**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.

**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 ...

**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.

**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

**10th grade**

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 ...

**Organic chemistry**

Is m-nitroaniline soluble in water, 1.0M NaOH, 1.0M HCl?

**Organic chemistry**

is benzoic acid soluble in water, 1.0M NaOH, 1.0M HCl?

**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?

**Trig**

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

**Trig**

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

**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 :)

**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 >)...

**Bible**

I believe the 1st question is number 2. & the 2nd question is number 3. Can anyone confirm this. Thanks.

**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 ...

**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

**Algebra**

A rectangle is 20 inches tall it's area is 260 inches what is the width

**Business**

What is the proper format for a research taxonomy? I have to write about the Strategic Management process.

**History**

I still think its #1? is that correct?

**History**

One of the significant changes in atmosphere in Jefferson's administration was: 1. The number of common people involved in government. 2. The closing of the bank of the united states. 3. the widespread dismissal of federalist officeholders. 4. The reinstatement of the ...

**Econonmics**

Assume that the gross national debt initially is equal to $3 trillion and the federal government then runs a deficit of $300 billion

**Organic Chemistry**

The one we used was sodium hypochlorite (NaOCl)

**Organic Chemistry**

What other oxidizing reagents could have been used to convert the 9-fluorenol to 9-fluorenone?

**math**

Ok really I don't know all of the steps but if you look at the da/dt of a) and put it over the dh/dt of b) then you get your answer. I don't know. I'm doing it right now. God Bless!