Wednesday
April 23, 2014

Posts by carl


Total # Posts: 226

Math
how do i write that in terms of An? like An= (2)^n(-1)^n some thing like that? or is that right

Math
What is the equation for the sequence 1, 2, 1/4, 8, 1/16, 32,......

math
b = 20 + 1/2(t-1975) kg/person I think thats right/my guess, no promises =]

Precalc
What name is given to figures (wave) to indicate that points are attracted to only certain regions in the plane and no to others?

Chemistry
You are titrating 35.00 mL of a 1.20 M solution of HCOOH with a strong base. If you add 1.00 mL of a 3.60 M solution of sodium hydroxide, what is the final pH of the acid solution? The Ka for HCOOH is 1.8 X 10-4.

Chemistry
Thank You so much! I really appreciate the help!

Chemistry
What is the pH of a 0.94 M solution of HBrO that is also 0.59 M in magnesium hypobromite, the salt of it's conjugate base? The Ka for HBrO = 2.8 X 10-9.

Physics
image5.65.jpg

Physics
When a patient’s injured neck is healing, it is often desirable to prevent the weight of the head from pushing down on the neck. This can be accomplished with the system of pulleys shown in the figure. The pulleys are all small and extremely light in weight and have no ap...

math
Venus begins a new year every 225 days. Earth begins a new year every 365 days. If both planets begin a new year on the same day, how many days will pass befor that happens again.

math
Venus begins a new year every 225 days. Earth begins a new year every 365 days. If both planets begin a new year on the same day, how many days will pass befor that happens again.

math
3-2x+4=21

ENGLISH
Testcles

Math (URGENT)
write a formula that gives you the number of regions formed when x points are placed on a circle and all possible chords are drawn. ex. 2pts has 2 regions, 3pts has 4 regions, 5pts has 17 regions

Math
write a formula that gives you the number of regions formed when x points are placed on a circle and all possible chords are drawn. ex. 2pts has 2 regions, 3pts has 4 regions, 5pts has 17 regions

geometry
The sum of the measures of the interior angles in a polygon is 540 degrees. How many sides does the polygon have?

math
One of your friends is heading north for the Christmas holiday and the other friend is heading south. If their destinies are 1029 miles apart and one car is traveling at 45 miles per hour and the other car is traveling at 53 miles per hour. How many hours before the two cars ...

world lit
Which word did not originate from those used in various occupation? 1.seasons 2.person 3.tease 4.broker

vocabulary skills
which greek base means eye? 1.neur 2.myel 3.phren 4.ophthalm

vocabulary skills
the greek combining form -pathy means: 1.abnormal discharge. 2.tumor arising in or composed of. 3.disease of. 4.treatment of.

lit
which word is not derived from terms used in drama? 1.chorus 2.pants 3.scene 4.size

Physics
1.) A lawnmower engine claims to provide 18 hp of power and 6.25 ft lb of torque. If this is true, what must be the rotational speed in RPM? 2.) The conversion of the shaft power of a wind turbine to electricity is the function of the generator. Assume it has an efficiency of ...

Physics
A cylinder with a valve at the bottom is filled with an ideal gas. The valve is now opened and some of the gas escapes slowly. The valve is then closed, after which the piston is observed to be at a lower position. Assume that the system is in thermal equilibrium with the surr...

greek vocab.
which word did not originate from the word of the arts? 1. maudlin 2. martyr 3. character 4. colossal

lit
which word did not originate from military language? 1 pioneer 2 phrase 3 salary 4 trophy

Chemistry
yes Im sorry, it was for M

Chemistry
How do I set up my equation to determine what the pH will be when the concentration of Fe^3+ is reduced to 10^-7? The previous part of the question had me find what the pH would be for the Fe(OH)3 to precipitate at 0.20 M. which i found was 1.37

Calculus
A particle is moving along the curve y = 2 √{3 x + 7}. As the particle passes through the point (3, 8), its x-coordinate increases at a rate of 4 units per second. Find the rate of change of the distance from the particle to the origin at this instant.

Calculus
Gravel is being dumped from a conveyor belt at a rate of 50 cubic feet per minute. It forms a pile in the shape of a right circular cone whose base diameter and height are always equal to each other. How fast is the height of the pile increasing when the pile is 14 feet high?...

Social Studies
Mummification Process

social studies
beeswax

St. Andrews
An airplane traveling 1011 m above the ocean at 145 km/h is going to drop a box of supplies to shipwrecked victims below. (a) How many seconds before the plane is directly overhead should the box be dropped? 1 s (b) What is the horizontal distance between the plane and the vic...

second grade
idk

Math
How do you write an expression for... the value in cents of 5 quarters? Thank You

science
the amount of solar energy that is intercepted by the earth is___by the __ of __. a) determind, lenght , daylight b) affected, presence, clouds in the sky c) influenced, phenomena, day and night d) influenced, phenomena, parallelism of axis e) all of the above

science
the amount of solar energy trhat is intercepted by the earth is___by the __ of __. a) determind, lenght , daylight b) affected, presence, clouds in the sky c) influenced, phenomena, day and night d) influenced, phenomena, parallelism of axis e) all of the above

scinece
an earth satellite in an elliptical orbit moves with a) faster speed as it age b) none of the above c) constant speed d) slower speed as it age

science
Geocentric" means that the earth is the center of the unvierse, including the sun, the moon, the planets, and all the stars. Is the universe geocentric? yes no yes

algebra
How would you explain to your friend why the quotient of x^8 and X^2 is x^6 and not x^4?

science
does light have mass?

Chemistry II
1.18X10^10

Chemistry II
This is what I have. Could you please correct my work? Thank you. Compute the equilibrium constant for Ni^2+ (aq) and Cd (s). reduction Ni²⁺(aq) + 2 e⁻ ⇌ Ni(s) ; E°_red = -0.25V -oxidation Cd(s) ⇌ Cd²⁺(aq) + 2 e⁻ ; E°_ox =...

english
B The boys contemplated climbing up the sinister cliff but decided it was too dangerous. Contemplated means to "think through" and sinister is the equivalent of unfavorable

Chemistry II
What am I doing wrong? I am trying to balance the equation: NO3^-(aq)+Sn^2+(aq)-->Sn^4+(aq)+NO(g) here are the coefficients I have. what is wrong with them? 2NO3^-(aq)+3Sn^2+(aq)+8OH-(aq)-->3Sn^4+(aq)+2NO(g)+4H2O(l)

Chemistry II
I cannot balance this equation and I am really struggling. Cr2O7^2-(aq)+ Cu^+(s)-->Cr^3+(aq)+Cu^2+(aq) How do I get the charges to balance?

Healthcare
Healthcare expenses can cause people to lose their homes, default on loans and (in general) cause people to stop contributing to the economy because they are unable to afford basic necessities. Advantages -healtcare for people without insurance -slows the increasing cost of me...

Chemistry II
*sorry 1.17*10^-3 is what i meant

Chemistry II
Compute the equilibrium constant for Ni^2+ (aq) and Cd (s). I keep getting 1.7*10^-3 but apparently that is wrong. What am I doing incorrectly?

Chemistry
Ni (s) + Cd^2+(aq)-->Ni^2+(aq)+ Cd(s) MnO4^-1(aq)+ Al (s) ---> Mn^2+(aq)+Al^3+(aq) no matter what i do, i can't seem to balance either of these redox reactions. i'm always off. is there a trick to doing these? i need help please.

Physics
You can get a sunburn on a cloudy day, but you can't get a sunburn even on a sunny day if you are behind glass. why?

Math
Hockey teams recueve 2 points when they win and 1 point when they tie. One season, a team won a championship with 66 points. They won 12 more games than they tied. How many winds dd the team have and how many ties?

Strategies!
How could I solve this problem two ways other then using the traditional algorithm. 452+721+908

7th grade
-2a-3(b-4a) . -2b-3b-12a 10a-3b

Math
Is it like y=1/8-8 . How did you get 125

Math
Which slope would be steeper : 8 or 1/8

Physics
ok so i see what i did wrong and got a value of 2276308.355 J

Physics
A roller coaster is at the top of a 98.2 m hill and has a mass of 1831.0 kg. It is traveling at a velocity of 23.7 m/s. What is the coaster car's TOTAL energy? I took the eg=1/2mv^2 and plugged in (1831)(9.8)(98.2) and got 1762081.16 I then took the ek= 1/2mv^2 and plugged...

Physics
I dont know where to begin with this one because I dont recall my teacher giving us a formula for it. A baby carriage is sitting at the top of a hill that is 22.1 m high. The carriage with the baby weighs 15.8 N. What is the Ep for the carriage and baby in relation to the bott...

Physics
well my teacher does not require that and when we went over problems similar to this, it was expanded out the way i have it now.

Physics
I just wanna check if i am right. A car is traveling with a velocity of 42.3 m/s and has a mass of 2183.0 kg. Find the Ek of the car. i used the ek=1/2mv^2 and plugged everything in to get a total of 1953010.035 J .. is that right?

Calculus
Use the table of values to estimate ⌠6 ⎮ f(x)⋅dx ⌡0 Use three sub intervals and the (a) left endpoints, (b) right endpoints, and (c) midpoints. If f is an increasing function, how does each estimate compare with the actual value? Explain your reasoning....

Calculus
Give an example of a function that is integrable on the interval [-1,1], but not continuous on [-1,1].

pre-calculus
List the possible rational roots of each equation. Then determine the rational roots. 6x^4+35x^3-x^2-7x-1 The answer in the back of the book is: -1/3 and 1/2 I know that I'm supposed to use Descartes rule of signs. I found that there was 1 positive zero and 3 or 1 negative...

Statistics
show me how

Trigonometry
9x^4-24x^3+16x^2 (Find all solutions!)

algebra 2
teresa and julia are among 10 students who have applied for a trip to washington DC. Two students from the group will be selected at random for the trip. What is the probability that teresa and julia will be the 2 students selected /

math
how do you find the area of a circle

math
how do you divide fractions

11th grade Algebra II
teresa and julia are among 10 students who have applied for a trip to washington DC. Two students from the group will be selected at random for the trip. What is the probability that teresa and julia will be the 2 students selected?

algebra
Solve the problem. Frank can type a report in 3 hours and James takes 4 hours. How long will it take the two of them typing together?

5th
what are facts and inferences please give an example

sience
Whats the best site to go on if you want to learn about the elements?

language arts
what are facts and inferences please give an example

Physics - URGENT
The seventh harmonic of a one end closed pipe organ has a frequency of 732 Hz, on a day when the temperature is 10 degrees Celsius. How long is the pipe? How long would it be for 732 to be the first harmonic?

geography
i never thought of that thanks so much you guys are great id be lost without you i have now finished my essay hopefully i will get a good mark . fingers crossed! :)

geography
im writing a report on the causes of deforestation in the Amazonian rainforest. i need to explain how forest fires destroy the rainforest. up to now ive wrote about how the farmers burn parts of the rainforest to use for farms cattle ranches and to grow crops is there anything...

science
hey how u all doin? If a ball is thrown vertically upwards into the air. What is the main energy conversion that takes place as the ball rises towards its maximum height? thanks carl

math
Is the answer 67130 Wm^2

math
Hi, Nearly all of the energy used on earth comes originally from the sun, and that solar radiation is intercepted at 1370 Wm^-^2 at the top of the atomsphere, and that 49%of this radiation is absorbed by the earths surface. If a shallow dish containing ice or warte, placed on ...

help plzzz
A line of chorus girls!

chemistry
a 506g piece of copper tubing is heated to 89.5C and placed in an insulated vessel containing 159g of water at 22.8C. Assuming no loss of water and a heat capacity for the vessel of 10.0J/K, what is the final temperature of the system (c of copper = 0.387 J/g*K)?

6th grade
yjjjjfg

Calculus
nvm it's 3/5

Calculus
If d/dx(f(3x^5))=9x^4 Find f'(x)

Calculus
No, there's no typo. That's what I can't figure this out. I put zero and it's wrong.

Calculus
C(x) = 16x^(1/2) + x^2/1000 Find x to meet the minimum cost

Calculus
C(x)= 16sqrt(x) + (x^2)/1000 Find the production level that will minimize the average cost

Calculus
nvm i figured it out

Calculus
1/f = 1/p + 1/q What is the rate of change of p with respect to q if q=2 and f=4?

science
idk? i got it for hw

science
idk?

Math
Show that the compositions below do not result in the same point. Point A (x,y) 90 degrees clockwise reflection around the y-axis for point (-4,-3) ____________

com135
what are some of the differances between internal proposal and external proposal

com135
Management at your project management firm wants to ensure staff members are fully trained on new technologies before planning, developing, and maintaining information technology projects for clients. As a result, your managers have decided to implement training for your compa...

com
Create a table that shows the different elements that are found in an internal proposal and an external proposal for this training.

com135
example of a progress report table

Dancing Skeletons by Katherine Dettwyler
First, Dancing Skeletons is an ethnography, not a novel. The former is a non-fiction, written description of a culture. The latter is a work of fiction. Second, a good representation of ethnocentrism can be found on pages 27-35. Ethnocentrism is that tendency to compare anothe...

math
the 3 reasoners of multiplication are 1)strategic additive reasoners. 2) Strtategoc multiplicative reasoners. 3) One worders and double counters. Could i please have examples of each.

oratorical piece
can you give me an oratorical piece

Algebra
I have a problem, which requires I solve the following system of linear inequality graphically. my textbook is vague and does not provide online examples or instruction to assist me withinfo to work the problem. Please help? Thank you. 3x - y is lessor than or equal to 6 x is ...

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