Wednesday
April 16, 2014

Posts by brian


Total # Posts: 580

math
You have 75 employees, 1/6th of them retired, and 1/4 of them left the company for new jobs. how many employees did you have in the begining?

Computers
LAN is an acronym for "Local Area Network" and WAN is "Wide Area Network"

Physics
Two small loudspeakers that are 5.50 apart are emitting sound in phase. From both of them, you hear a singer singing C# (frequency 277 ), while the speed of sound in the room is 340 . Assuming that you are rather far from these speakers, if you start out at point equidistant f...

math/probability
If two fair dice are rolled, find the probability of a sum of 6 given that the roll is a "double". How do I do this?

probability/math
Three cards are drawn without replacement from an ordinary deck of 52 playing cards. What is the probability that the second and third cards are kings if the first card was not a king?

AP Physics
Assume that at sea-level the air pressure is 1.0 atm and the air density is 1.3 kg/m3. (a) What would be the height of the atmosphere if the air density were constant? 7.919 km (b) What would be the height of the atmosphere if the air density decreased linearly to zero with he...

to bobpursley
In my heads/tails question- why isn't it 1/6? I flip a coin three times, aren't there only 6 possible outcomes?

math
what are the odds in favor of getting at least one head in three successive flips of a coin? I need to know the formula on this. I have 1/6 over 1- 1/6. But I can't figure out how to do the math. Am I right?

math
Lead Contamination More than a decade ago high levels of lead in the blood put 88% of children at risk. A concerted effort was made to remove lead from the environment. In a random sample of 200 children taken more than a decade ago, what is the probability that 50 or more had...

us history
what territory did the french claim, prior to the french and indian war

physics
A bullet of mass 8.0 g is fired horizontally into a 2.2 kg wooden block at rest on a horizontal surface. The coefficient of kinetic friction between block and surface is 0.40. The bullet comes to rest in the block, which moves 2.30 m. (a) What is the speed of the block immedia...

physics
Ricardo, mass 88 kg and Carmelita, who is lighter, are enjoying Lake Merced at dusk in a 30 kg canoe. When the canoe is at rest in the placid water, they exchange seats, which are 3.0 m apart and symmetrically located with respect to the center of the canoe. Ricardo notices th...

french 2
Quand tu vas a lecole

Chemistry
What are complementary colors and how due different wavelengths of light affect the original color?

Chemistry
What is a general rule relating the color of an object to the color(s) of light that it absorbs?

student council
what is a good speech of secretary and vice presidents: this is what secretary it does attend council meetings take pictures at school functions distribute and collect surveys at school funtions and from classrooms participate in council activities vice president attend counci...

college
atoms heated in a sample emit only certain colors of light in sharp lines and not all colors blended together tells us what about the energy of an atom?

physics
A popular pastime is to see who can push an object closest to the edge of a table without its going over. You push a 130 g object and release it 2.00 m from the table edge. Unfortunately, you push a little too hard. The object slides across, sails off the edge, falls 1.00 m to...

Physics
A proton, moving with a velocity of vinitial i, collides elastically with another proton that is initially at rest. Assuming that the 2 protons have equal speeds after the collision, find (a) the speed of each proton after the collision in terms of vinitial and (b) the directi...

English
Hello. I was wondering if you can please assist me with writing a short paragraph comparing Baldwin's account of the Titanic with Rosenthal's account of his visit to Auschwitz. While doing so I have to explain how the tone and purpose of each story is different with at...

Physics
Two masses of 4.25 kg each, connected by a string, slide down a ramp making an angle of 44° with the horizontal. The coefficient of kinetic friction between m1 and the ramp is 0.31. The coefficient of kinetic friction between m2 and the ramp is 0.12. Find the magnitude of ...

Physics
A certain force gives mass m1 an acceleration of 10.0 m/s2 and mass m2 an acceleration of 4.0 m/s2. What acceleration would the force give to an object with a mass of (m2-m1)?

physics
A 24- kg monkey climbs up a massless rope that runs over a frictionless tree limb and back down to a 35- kg package on the ground. What is the magnitude of the least acceleration the monkey must have if it is to lift the package off the ground?

physics
A certain force gives mass m1 an acceleration of 10.0 m/s2 and mass m2 an acceleration of 4.0 m/s2. What acceleration would the force give to an object with a mass of (m2-m1)?

Algebra 1
2≤y-4<7

Algebra 1
i mean 5/6(12z-24)>2/5z-25)

Algebra 1
5/6(12z-24)>2/5(25z-25> Help please?

math
It is 6:45 on Friday evening at the Y;all Come Restaurant. Winnie the waitress approaches the table where the four Martins are studying their menus. Over in the corner, Conrad is reading the comics. One customer gets up to leave. It's Bill who pays his bill with a $10.00 b...

algebra
For this problem a/a-1- a-1/a=4 . Is the answer a=1 1/2. I solved it by multiplying a(a-1) both side as suggested by bobpursley. thanks

algebra
how to solve this: a/a-1 - a-1/a = 4

economics
Studies show that the income elasticity of demand for servants in the United States exceeds 1. Nevertheless, the number of servants has been decreasing during the last 75 years while incomes have risen sygnificantly. How can these facts be reconciled?

math
if three darts are thrown at the dart board and no darts hits a line what score is possible?

Geology
How far—to the nearest tenth of a kilometer—is the well in section 11 from the southwest corner of section 10?

computer
Eshelman

math
in a class every boy is friends with exactly three girls,

Accounting-business
63,875 is the answer I came up with. I hope this is the correct answer, but not 100% positive

social studies
what did the khmer rouge do for four years in cambodia starting in 1975

7th Grade Life Science
Which of the following is a hard covering that protects an anthropod? a)exoskeleton b)endoskeleton c)mantle d)segment

7th grade Life Science
Which of the following structures does not provide support for invertebrae bodies? a)backbone b)tiny glass structures c)skin d)exoskeleton

English
So for English we're doing poetry. With a partner we both wrote our own poems and compared them. We had to find one word that fits into both poems and we got the word "Change". Now we have to be able to read our poems while not boring the class by doing something...

10th Grade Math
What is 3X^2-7=11

Trigonometry
Smalltown, latitude 53.6 degrees N, lies directly north of Bigville, latitude 38.6 degrees N. Give the distance between the two cities. (Hint: The earth's radius is about 3,960 miles.) This is a question similar to what will be on my test tomorrow. I'd really appreciat...

math help
Simplify (2t)(2t)^5 is it (2t)^4

Social Studies aka History
During Medieval times, like the time of Ghana, Mali, Songhai, etc.

Social Studies aka History
Give 2 reasons why gold was important to people in North Africa.

math
I'll give you what I know that is an undefined problem.

trig--power reducing formulas
Having trouble with this problem: Rewrite the expression as an equivalent expression that does not contain powers greater than 1. Cos³x My answer: cos³x=(cos²x)(cosx) =(1+cos2x/2)(cosx)-->cos+cos³x/2...which is wrong

Trig
Hey thanks can you point me in the direction to solving this problem 2tan(5pi/12)/1-tan²(5pi/12)

Trig
Using a double angle formula how would you find the exact value of this expression? Cos²105° - sin²105°

Algebra
jose can complete the job in a hours, and Maria can complete the job in b hours. How long does it take them to complete the job when they work together? I need a formula

Math
No no. Here, use the distributave property for 10(10X+11). Then, subtract 110 from both sides. Lastly, divide by 100, the answer should be -1. Do you et how to do it now?

Algebra 1
Um, excuse me Mitch, but this is a multiple question answer and the following are the choices: a. 8 minutes b. 16 minutes c. 32 minutes d. 30 minutes

Algebra 1
Al completed the job in 20 minutes. Al and Pam completed the job together in 12 minutes. How long does it take Pam to complete the job by herself?

math
(y-10)(y+2)=0

algebra
How much water mest be added to 6 ounces of a 20% acid solution to obtain a 15% acid solution?

Math
How much water mest be added to 6 ounces of a 20% acid solution to obtain a 15% acid solution?

Math
I am pretty sure the answer is 68.

Trig--check answer
So my best way to solve (Tanx +1)(cosx +1)=0 Would be to divide by either cos or tan..instead of squaring and using an identity?

Trig--check answer
Solve the equation of the interval (0, 2pi) cosx=sinx I squared both sides to get :cos²x=sin²x Then using tri indentites I came up with cos²x=1-cos²x Ended up with 2cos²x=1 Would the answer be cos²x=1/2???

Trigonometry
How would you find the solutions to this problem? (cosx)(cscx)=2cosx

Factorning exponets
How would you factor 5x¯¾ +35x¼ ?? My answer is 5x¼ (x¯¹ + 7) but its wrong..can somebody please hellp!!

It's been more than 24 hours and no answer...
A translation has this rule:(x-5,y). Fill in the answers This translation is (how many) Units (in what direction)

ms. sue!
Simple American like myself lose their job :(

Chemistry
for the second set i put Ph=6 and got H+=1e-6 and then HA=1e6 i think thats wrong.. whats wrong with it?

Chemistry
Consider 57.5 mL of a solution of weak acid HA (Ka = 1.00 10-6), which has a pH of 3.800. What volume of water must be added to make the pH = 6.000?

history
I am struggling to figure out the way that student potests effected the Vietnam War can anyone help?

chemistry help
or the compound: carbon in the middle with 3 bonds -double bond to oxygen -bond to Mn(CO)5 -bond to CH3 group is the oxidation state of the metal +1? d count 6? total electron count 20? coordination number 7?

chemistry help
for the compound: carbon in the middle with 3 bonds -double bond to oxygen -bond to Mn(CO)5 -bond to CH3 group is the oxidation state of the metal +1? d count 6? total electron count 20? coordination number 7?

statistics
A college professor decides to run for Congress in a district with 450,000 registered voters. In a survey she commissioned, 58% of the 4000 registered voters interviewed indicated that they plan to vote for her. The population of interest is the: A. 450,000 registered voters i...

stats...please help, I don't really understand
A college professor decides to run for Congress in a district with 450,000 registered voters. In a survey she commissioned, 58% of the 4000 registered voters interviewed indicated that they plan to vote for her. The population of interest is the: A. 450,000 registered voters i...

SCIENCE!!
Everyone here... You guys have no clue how much you guys just helped me.. like seriously.. Thanx!!!

SCIENCE!!
Everyone here... You guys have no clue how much you guys just helped me.. like seriously.. Thanx!!!

7th grade
34 yards for radius or the diameter? cuz it could either be (34x2) x 3.14= 213.52 yds or 34 x 3.14= 106.76 yds thats why you gotta state wether its diameter or radius

supreme ct cases
can someone explain to me baker v carr in little kid words? i dont understand what actually happened

Chemistry
What element is in the second period in Group 4A?

chem
What is the activation energy for a reaction whose rate is tripled by a temperature increase from 27.5°C to 55.5°C?

math
(x^5y^8)/(x^3y^4)

Chem
so you mean H-N is not a hydrogen bond? and it is an ionic so the list would be Dispersion H bond dipole dipole?

Chem
what kind of intermolec forces are in NH4Cl i thought it was london dispersion, dipole dipole, and hydrogen bonding and nottttt ionic. what am i doing wrong?

CHEM
is NH3 a base or an acid how do u tell?

Organic Chemistry
When benzyl chloride is treated with sodium iodide in acetone, it reacts much faster than 1-chlorobutane, even though both compounds are primary alkyl chlorides

physics (emergency!)
the kinetic energy on e- is negative

Algebra
Thank you; however, the cyclists were traveling in the same direction, leaving at the same time. Therefore, I'm afraid I'm still without an answer.

Algebra
I've been working on this for an hour and I know it's more simple than I'm making it. Please enlighten me. Cyclist 1 is traveling at 20 mph, Cyclist 2 is traveling at 14 mph. How long before they're 15 miles apart? I've tried to fill in a block diagram and ...

Precalc max and min wd problems
when an auto dealers mark up over factory price is x dollars per care he dealer sells (300-2/3 x)cars per month what value of x will the profit be the greatest?

statistics
1000 significance tests are performed using alpha = .05. Assumimg that all null hypotheses are true, about how many of the test results would you expect to be statistically significant?

Chemistry
A solution was prepared by adding 15mL of 0.129 M KI, 5mL of 0.1 M Na2S2O3, 1mL of starch solution, and 15mL of 0.125 M (NH4)2S2O8. Calculate the concentration of (M) of I in the final mixture before the chemical reaction.

nonfiction
actually 20 is b naadyia had the right answers sorry dee

math
when might you think you're built upside down?

math 2nd grade
circle the action verbs on the certificate. Then write them on the lines provided below the certificate. good work! lin won on field Day because she: runs very fast jump very high climps very high works very hard

precalculus
I need help with writing the quotient of this complex number in standard form: (1 + 4i)/(5 - 12i)

Math
how would i go about finding the domain of the function f(x)=(3x+1)/(sqrt(x^2+x-2)) and both the domain and range of g(x)=(5x-3)/(2x+1)

uop
what is the leader/managers treatment of internal staeholders?

Algebra
Not 1:30 its 1:25

Math
How do i find the prime factorization of 225?

Math (Check problem
Subtract and Simpfly 2) 2/3 - 1/2 my answear: 1/6

Math (Check problem
Add the fractions 1) 3/4 + 1/24 my answear: 19/24 i think the lcm is 24. 4X6=24 and 1X24=24

Math
subtract and simplify. 7/9 - 7/27

R.E
What is a puja tray

science
What are the 4 nuclotides found in DNA?

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