# Posts by samantha

Total # Posts: 1,743

**Geometry**

Two cylinders have the same volume. If the radius of cylinder I is 3 times the radius of cylinder II, then the height of cylinder II is how many times the height of cylinder I? A. 12 B. 9 C. 6 D. 3 Please explain how, if possible.

**Math**

In the town of Niceville, a local lottery is held once a year for the residents. Lottery tickets cost 50 cents apiece. Each lottery ticket contains four numbers, from 1 to 20. The lottery machine will select six numbers from 1 to 20. A winning ticket, worth $100, will contain ...

**Algaebra**

Two functions f and g are defined by f:x = 25 /(3x-2) g:x = x^2 Find the composite function Please show all calculations, thank you!

**Algaebra**

Two functions f and g are defined by f:x = x^2 + 3 g:x = 2x+1 Find the function fg Please help and show all working out,i got the answer for it but i really don't understand it!!! Thank You

**Complex Algaebra, Plz Help!!**

Could you ellaborate further on how you got your answer for b please Damon. The composite function fg thank you

**Complex Algaebra, Plz Help!!**

Sorry i wrote c wrong its the solution of equation fg(x)=2/(x-1) really sorry, had less sleep last night

**Complex Algaebra, Plz Help!!**

If we can assume it means = I think that is right

**Complex Algaebra, Plz Help!!**

Good evening to all around the world. Need help with this question, however i must show my answers supported by the working out. Please help. This question is difficult, the one who solves it for me is my hero!!!! Q11) Two functions f and g are defined by F:x (arrow) 25/(3x-2...

**Please..**

what would happen to the respiratory system if it didn't have the nose, pharynx, larynx, trachea, bronchi, lungs, and mucus? I know what would happen to the human body but what would happen specifically to the respiratory system? Thank you!

**Biology**

what would happen to the respiratory system if it didn't have the nose, pharynx, larynx, trachea, bronchi, lungs, and mucus? I know what would happen to the human body but what would happen specifically to the respiratory system? Thank you.

**science**

Both Jim and his mother have a widow's peak but his father doesn't. Jim marries Lisa, who doesn't have a widow's peak. What is the probability that their children will have widow's peak?

**science**

A gas is confined to a cylinder under constant atmospheric pressure, as illustrated in the figure below. When 0.46 kJ of heat is added to the gas, it expands and does 186 J of work on the surroundings. What are the values of ÄH and ÄE for this process?

**science**

An experiment calls for you to use 100. mL of 0.91 M HNO3 solution. All you have available is a bottle of 5.00 M HNO3. How would you prepare the desired solution

**science**

(c) The kinetic energy of the emitted electrons is measured to be 15.2 eV. What is the first ionization energy of Hg in kJ/mol?

**science**

thanks!!!

**science**

Calculate the density of sulfur hexafluoride gas at 703 torr and 23°C. density is mass/volume so how do i get those from what i am given? also ) Calculate the molar mass of a vapor that has a density of 6.735 g/L at 11°C and 743 torr.

**science**

Calculate the number of molecules in a deep breath of air whose volume is 2.68 L at body temperature, 37°C, and a pressure of 743 torr (b) The adult blue whale has a lung capacity of 5.0 103 L. Calculate the mass of air (assume an average molar mass 28.98 g/mol) contained ...

**science**

thanks! for b i used that equation and got the volume to be .400 buts its wrong. do i use the presure from a or do i just use 1atm?

**science**

that was my answer for letter a and i did all of those conversions first and i still got that anwerrs which is wrong. can you do the problem and tell me what you get?

**science**

i got 1.28 but its wrong

**science**

how do i ansewr this question? An aerosol spray can with a volume of 400. mL contains 2.25 g of propane gas (C3H8) as a propellant (a) If the can is at 31°C, what is the pressure in the can? (b) What volume would the propane occupy at STP? (c) The can's label says that...

**science**

A fixed quantity of gas at 22°C exhibits a pressure of 739 torr and occupies a volume of 5.46 (a) Calculate the volume the gas will occupy if the pressure is increased to 1.74 atm while the temperature is held constant.

**geometry**

find the measures bc and ac

**People**

who is a famous person who didn't go to college or didn't graduate high school and is in bad shape because of it. (aka is poor or cant get a job or turned into a criminal etc)

**ece**

1.wich of the following dramatic play behaviors are most typical for a 2-year old child? a.uses realistic props,and repeats routines over and over. b.prefers exciting and danger-packed themesfor play. c.plays in groups of one gender, with lots of dialogue. d.prefers rigid ...

**math**

28 weeks

**chemistry**

what is the concentration of the hydroxide ion in a solution if .12 mol of strontium hydroxide are dissolved in water and the final solution volume is 500. mL?

**debate**

does that mean that companies that supply arms and stuff are the reason why we would go through war/ i dotn understand...honestly i don't understand capitalism at all..:(

**debate**

why would a capitalist society, in general, cause war?

**chemistry**

(a) Construct a Lewis structure for O2 in which each atom achieves an octet of electrons. (Assign lone pairs where appropriate.) i am using marvin sketch and don't know what i need to show

**chem**

Which ionic compound is expected to form from combining the following pairs of elements? yttrium and oxygen i put YO but its wrong

**biology**

why would a One serving of particular food that contains 16 g of carbohydrates, 2 g of proteins, and 10 g of fats hav 300 calories?

**math**

the ratio of the number of men to the number of woman working at tommys pub is 7:2.altogather there are 360 workers at the company. how many of the workers are woman.

**chem**

Arrange the following oxides in order of increasing acidity: P2O5, As2O5, N2O5, SnO2, SeO3, and BaO. (Use the appropriate <, =, or > symbol to separate substances in the list.)

**Physics. Easy question? Please help**

What is the (a) maximum and (b) minimum total resistance value that can be obtained using three resistors whose values are 2.0 ohms, 4.0ohms and 6.0 ohms? The resistors can be used individually, in pairs, or all three at once. Is this a trick question? Is the answer 12 and 2?

**chemistry**

i got BaO < SnO_2 < N_2O_5 < P_2O_5 < As_2O_5 < SeO_3 but its wrong

**chemistry**

Arrange the following oxides in order of increasing acidity: P2O5, As2O5, N2O5, SnO2, SeO3, and BaO. (Use the appropriate <, =, or > symbol to separate substances in the list.) I have no idea how to do this! please help!

**chemistry**

how does aluminum's position on the periodic table relate to its properties? i mean like how does it effect it's properties? thank you

**math**

ok thank you!!

**math**

what is the difference btwn 5^3 and (5)^3? When ever they have a question in which they have a a number squared and then they have another question right after it asking the difference between the same question in parenthesis..is it a trick question? is the answer the same or ...

**Physics. Free electron density, please help!**

A length of wire has a radius of 3.00 × 10-3 m and a resistance of 0.200 Ω. When the potential difference across the wire is 10.0 V, the electron drift speed is found to be 2.98 × 10-4 m/s. On the basis of these data, calculate the density of free electrons in...

**chemistry help!!**

For each of the following pairs, indicate which element has the larger first ionization energy Mg or Al. i put Mg. Repulsion of paired electrons in Mg is more significant than Al's higher effective nuclear charge. but got it wrong. Al. Repulsion of paired electrons in Al ...

**chem**

Write the condensed electron configurations for the following atoms and indicate how many unpaired electrons each has. for Ca and Y for Ca i got [Ar] 4s2 but it got cuonted wrong

**algebra**

An investor invested a total of $2,600 in two mutual funds. One fund earned a 5% profit while the other earned a 3% profit. If the investor's total profit was $98, how much was invested in each mutual fund? The amount invested in the mutual fund that earned 5% was $ ? The ...

**algebra**

An investor invested a total of $500 in two mutual funds. One fund earned a 8% profit while the other earned a 4% profit. If the investor's total profit was $32, how much was invested in each mutual fund? The amount invested in the mutual fund that earned 8% was? The ...

**4th grade math**

Round 546 round to the ndarest hundred

**math**

2.20

**chem**

Among the elementary subatomic particles of physics is the muon, which decays within a few nanoseconds after formation. The muon has a rest mass 1.126 109 times that of a proton. Calculate the de Broglie wavelength associated with a muon traveling at a velocity of 3.35 104 cm/s.

**IT 235**

Post your response to the following questions: For which types of image creations might it be beneficial or necessary to add text? Which text effects do you like to use? How will your final project include text?

**chem**

please do not spam!

**chem**

If the detector is capturing 6. 107 photons per second at this wavelength, 1820 nm. what is the total energy of the photons detected in one hour? I got 2e7 but its wrong

**Physics**

A string that passes over a pulley has a 0.373 kg mass attached to one end and a 0.620 kg mass attached to the other end. The pulley, which is a disk of radius 9.50 cm, has friction in its axle. What is the magnitude of the frictional torque that must be exerted by the axle if...

**algebra**

It takes a passenger train 2 hours less time than it takes a freight train to make the trip from Central City to Clear Creek. The passenger train averages 96mi/hr while the freight train averages 64mi/hr. How far is it from Central City to Clear Creek?

**MAT 116**

A tugboat goes 180 miles upstream in 10 hours. The return trip downstream takes 5 hours. Find the speed of the tugboat without a current and the speed of the current.

**MAT 116**

The perimeter of a rectangle is 28 ft. The length is 10 ft longer than the width. Find the dimensions. Write a system of linear equations and solve the resulting system. Let x be the length and y be the width.

**Math**

im confused

**chem**

calculate the delta H for 3 Fe(s) + 4 CO2(g) ¨ 4 CO(g) + Fe3O4(s)

**Physical Education**

Tom served to Sue, who set up Stacey for a spike. Stacey went up for the spike and hit it into the ground on Team A's side. In the process of spiking the ball, Stacey hit the net with her hand. Who won the point and why?

**Science**

Many portable gas heaters and grills use propane, C3H8(g), as a fuel. Using standard enthalpies of formation, calculate the quantity of heat produced when 11.90 g of propane is completely combusted in air under standard conditions. I got -600 kj but its wrong

**algebra**

Camille can swim against the current at 1.5 m/s and with the current at 3.5m/s. Write an equation that expresses each fact. How fast can she swim in still water?

**algebra**

Camille can swim against the current at 1.5m/s and with the current at 3.5m/s. Write and equation that expresses each fact. How fast can she swim in still water?

**algebra**

The 4200 km trip from New York to San Francisco take 6 h flying against the wind but only 5 h returning. Find the speed of the plane in still air and the speed of the wind.

**science(reading)**

thank you!!!!

**science(reading)**

"he proved the existence of neutrons - elementary particles devoid of any electrical charge. In contrast with the helium nuclei (alpha rays) which are charged, and therefore repelled by the considerable electrical forces present in the nuclei of heavy atoms, this new tool...

**US HISTORY I**

Ms. Sue. Sorry this is my first time posting on this website. I posted the full question to avoid confusion. Let me clarify. My teacher stated that the identifications of these terms would be easy to find in our textbook or on the internet. He then stated that the significance...

**US HISTORY I**

A New World to the American Revolution Directions: IDENTIFY and give the SIGNIFICANCE of 5 of the 7 terms below. (Caveat! Be thorough! An IDENTIFICATION should answer the four criteria 1.What? 2.Where? 3.When? and 4.Results?, while the SIGNIFICANCE should state Why?) Example: ...

**Physics**

A 190-kg merry-go-round in the shape of a uniform, solid, horizontal disk of radius 1.50 m is set in motion by wrapping a rope about the rim of the disk and pulling on the rope. What constant force would have to be exerted on the rope to bring the merry-go-round from rest to ...

**Science**

I need help with coming up a hypothesis for and Organic Compound lab! Anyone have an idea?

**physics**

Block 1, of mass1 = 0.550kg , is connected over an ideal (massless and frictionless) pulley to block 2, of mass2 , as shown. For an angle of = 30.0 and a coefficient of kinetic friction between block 2 and the plane of = 0.300mu(kinetic friction), an acceleration of magnitude...

**Spanish Beg. 1 - help!**

¿Cómo te llamas? = literally means How are you called? Or What's your name? (Most common) ¿Cuál es tu nombre? = What is your name? Me llamo Samantha = I am Samantha Yo soy Samantha = I am Samantha Mi nombre es Samantha = My name is Samantha

**i need help ss**

1.D 2.b 3.b 4.c

**social studys**

1. D 2. B 3. B 4. C

**Math**

Suppose C(x) measures an economy's personal consumption expenditure and x the personal income, both in billions of dollars. Then the following function measures the economy's savings corresponding to an income of x billion dollars. S(x) = x - C(x) (Income minus ...

**math**

The weekly demand for the Pulsar 25 color LED television is represented by p, where p denotes the wholesale unit price in dollars and x denotes the quantity demanded. The weekly total cost function associated with manufacturing the Pulsar 25 is given by C(x), where C(x) ...

**earth**

The global-mean surface temperature of the earth is about 288 degrees Kelvin. Use the Stefan-Boltzman law to calculate the radiative flux corresponding to an object with this temperature. [hint: use σT4 with σ = 5.67x10-8 Wm-2K-4 ]

**chemistry**

In a bunsen burner experiment, when you place a piece of soot covered chalk over the hottest part of the flame, it changes back to a white color. What is the equation for this process? Thank you

**reading**

why do the Lina and Doon think tat their arrival has been expected, in the book CITY OF EMBER

**Chemistry**

if there are 8.3grams of Mg used, how many moles of MgO can you expect to be produced?

**DEBATE**

How would you present a uniqueness, link,or impact in a policy debate? Someone told me that during the cross examination period. You are supposed to ask a question and once receive the answer you are given permission to add the link but, i forgot how the question was stated. ...

**Biology**

1. How is both the external and internal stimuli involved in doing this: You are hungry so you reach for an apple in a fruit bowl. 2. Why is a hypothesis important to controlled experiments? Is it becasue you are trying to explain the effect that it would have to a substance ...

**math**

How many People answered this question so far and plus I agree

**Physics**

Your car can accelerate at 5m/^2 without a trailer. You add a trailer to your car that has 3 times the mass of your car. At what rate can your car (plus trailer) accelerate now? After accelerating the car travels at a constant speed of 30 m/s. What is the net force acting on it?

**health**

in through nose out through mouth

**chemistry**

4. All of these

**advanced functions math**

You buy a car in 2005 for $7860 and it depreciates linearly. You sell the car for $5040 in 2011.... what does the domain represent in the function? what does the range represent in this function? what is the slope of the linear representation? what is the function that models ...

**advanced functions math**

You buy a car in 2005 for $7860 and it depreciates linearly. You sell the car for $5040 in 2011.... what does the domain represent in the function? what does the range represent in this function? what is the slope of the linear representation? what is the function that models ...

**Math**

Ms. Sue I got $45 dollars I multiplied 15 x 3 = 45

**Math**

Restaurants charge about 3 times the cost of food for items on the menu. A restaurant pays $7 per pound for fish, $2 for a dozen lemons, and $6 for parsley. If 2 fish dinners can be made from this, how much would this meal costs? My answer is $36

**english**

tan

**General**

Not much I'm in 10th grade...And have access to a college lab with a teacher that is willing to guide me through

**General**

This is a question to everybody: I was just wondering if anyone had any science related questions or things they wonder about that may require experiments. If you have any ideas please mention them. I need this for a science for a science fair project and have at most a 6 ...

**algebra**

1/7x-x=-1/7(2x+84)

**Chem**

What is measured in carats

**algebra**

Find the inverse of the following function. Find the domain, range, and asymptotes of each function. Graph both functions on the same coordinate plane -x/3 f(x)=4+e ( if this makes sense, not sure how else to show it. the -x/3 is after the e like -x/3 to the power of e) please...

**college algebra**

Find the inverse of the following function. Find the domain, range, and asymptotes of each function. Graph both functions on the same coordinate plane f(x)=4+e^-x/3 please help me! show steps also, if i an just given an answer that wont help me! thanks in advance!!!

**Math**

First I factor 54. 5 4 | | 9 6 |\ \ \ 3 3 3 2 {3 3 3} group of threes that can be out of cubed root Because there are three threes I take them out of the cubed root (# = im going to consider this as my cubed root button) turning #54x^17 into 3#2x^17 Now we factor x^17: there ...

**math**

f(x)=-2x3+20x2-48x =(?)(-2x)(X-6) how do I find the missing factor of this?

**math**

How did you turn 5/6 to 1/6

**Politics/Debate**

thank you so much for today and yesterday

**Politics/Debate**

are there some important things about domestic infrastructure we should worry or know about? How does demestic infrastructure help us in a positive way and also in a negative way? why would someone negate the substantial increase in development for domestic infrastructure? ...