Tuesday

February 28, 2017
Total # Posts: 1,653

**algebra**

If p(t) is the profit (in dollars) that I expect my business to earn t years after opening, use functional notation to express my expected profit after 4 years and 6 months.

*February 19, 2011*

**Algerbra 2**

I am doing a worksheet for my alg. 2 class and in the worksheet it says: 'Simplify the expression. Assusme all variable are positive.' the problem is perentheses, square root of six times the power of 3 square root of six perentheses power of six!

*February 15, 2011*

**STATISTICS**

Private college and universities rely on money contributed by individuals and corporations for their operating expenses. Much of this money is put into a fund called an endowment, and the college spends only the interest earned by the fund. A recent survey of eight private ...

*February 15, 2011*

**american literature**

list three rhetorical devices that patrick Henry uses in his "speech in the virginia convention." Give an example from the speech of each rhetorical device.

*February 10, 2011*

**literature**

thanks for the help

*February 10, 2011*

**PHY**

Ok...I know this is a stupid question, but I need help! Ok, here it is: An object that has more electrons than it does protons will be _____ a CL^-1 ion. repelled by attracted to unaffected by I know that opposites attract and that same repells, but I am doubting myself with ...

*February 9, 2011*

**Physics**

I have been working on my Phys homework and came accross this question that is giving me some trouble: The charge (coul) on an object increases according to (q) = (2 coul)e[(0.050/sec)(t)], where t is in seconds. At how many seconds is the object deficient 1.56 x 10^20 ...

*February 5, 2011*

**Random Question**

Ok thank you.

*February 5, 2011*

**Random Question**

In the movie "Hauting Sarah" what is the twin sister trying to accomplish??? bringing her son back through her sister?

*February 5, 2011*

**Physics**

A certain "brand-new" (never-used) 9.0 volt cell contains 40mC of charge. The Electric energy "stored" in the cell amounts to about (___) joules. 0.0 0.06 37.5 .36 60x10^-4 I'm not too sure how to figure this problem out. I initially thought 40/9, but ...

*February 5, 2011*

**math**

Angelo is paid double time for each hour he works over 40 hours in a week. Last week he worked 46 hours and earned $520. What is his normal hourly rate?

*February 4, 2011*

**Calculus I**

evaluate and justify each step lim((xe^x)/tan x) as x approaches 1. i just need the over all jest of the problem because i don't know what to do to get rid of the 0 in the denominator. Thanks.

*January 31, 2011*

**physics**

a student does 314 J of work in moving a desk 2.1 m. What was the magnitude of the applied horizontal force?

*January 27, 2011*

**Science Half Lives**

I don't know the answer to your question, but can some one help me with mine? Question: After six half-lives, what percentage of a radioactive sample will remain? Please help me!, Thank you.

*January 25, 2011*

**CP Geometry**

Working with square roots (s.r.) and need help. - s.r. 60/5 This is negative s.r. 60/5

*January 25, 2011*

**CP Geometry**

it was a riddle. the answer was a jab well done.

*January 24, 2011*

**CP Geometry**

What do you call it when the nurse gives you a shot you hardly feel? s.r. = square root s.r.5 * s.r. 15. my choices are 5s.r.3, 20s.r.5, 4s.r.10, 3s.r.2, 3s.r.10, 2s.r.6, 9, 5s.r.6, 10s.r.3.

*January 24, 2011*

**Chemistry**

If the equilibirium reaction is 2 03(g) <--> 3 O2 9(g) is first order with respect to ozone, what type of plot( meaning what is plotted on the y axis vs what is plotted on the x-axis) will yield a straight line? what will the slope of the line represent? PLEASE help im ...

*January 23, 2011*

**Chemistry**

Sorry I typed it wrong i meant IF the rate of consumption of N2O4 (below) is .0221 what is the rate of production of NO2?

*January 23, 2011*

**Chemistry**

IF the rate of consumption of N2)4 (below) is .0221, what is the rate of production of NO2? N2O4(g)<->2NO2(g) Please help and explain. BC i have to actually understand how to do the problem. Thanks

*January 23, 2011*

**Comm215**

In this problem: Sally told Janice that she made the honor role. __ Pronoun shift in number __ Pronoun shift in person __ Ambiguous reference __ No error What does ambiguous reference mean?

*January 17, 2011*

**math**

If you borrow $5,000 at an APR of 5%. Find the interest, I after 36 months

*January 13, 2011*

**Math**

5% interest rate for 5,000,00 how much after 4 years

*January 13, 2011*

**physics**

A 10kg block is sliding at 10m/s along a frictionless track which suddenly curves straight up. how high will the block rise

*January 12, 2011*

**7th Grade Math-Exponents**

I don't understand this at all! Please help! Find the units digit for 7^197 without using a calculator. Explain how you found your answer.

*December 16, 2010*

**Math-7th grade**

that makes sense...thanks!

*December 16, 2010*

**Math-7th grade**

1.75 Thank you, But what about for day one? If it's 1.75 per day, how is the first day charge 3.75?

*December 16, 2010*

**Math-7th grade**

Im having trouble solving the amount per day... The table below shows the relationship between d, the number of days a DVD is returned late to a video rental store, and f, the amount of the late fee. Write an algebraic expression that describes this relationship? Prove your ...

*December 16, 2010*

**7th Grade Math**

I believe 21 2 doubled is 4 4 + 5 is 9 a quarter of 9 is 3 3+9 is 12 12 plus two is fourteen and half of fourteen is 7 7 plus 14 is 21.

*December 14, 2010*

**7th grade Math**

Thank you so much! I didn't understand it at all!

*December 14, 2010*

**7th grade Math**

A space probe is 7.62 x 10 to the 7th power kilometers from the surface of the planet Mars. If the space probe is traveling towards mars at a arate of 127 meters per second, how many hours will it take the probe to reach the surface of the plant? Round to the nearest hour. ...

*December 14, 2010*

**7th grade math**

Its a math homework assignment

*December 13, 2010*

**7th grade**

A space probe is 7.62 x 10 to the 7th power kilometers from the surface of the planet Mars. If the space probe is traveling towards mars at a arate of 127 meters per second, how many hours will it take the probe to reach the surface of the plant? Round to the nearest hour. Help!?

*December 13, 2010*

**Math**

jk sorry that was my sister she wont do it agin

*December 12, 2010*

**math**

the rectangle shown above has a total of 2808 square feet. the length is 78 feet. what is the width

*December 9, 2010*

**7th grade**

2(2.5b-9) + 6b= -7 5B -18 +6B= -7 Add the B's 11B -18=-7 +18 +18 11B= -11 Divide by 11 each side to get B=-1

*December 8, 2010*

**MATH**

Carmen deposits into an account that pays simple interest at a rate of per year. How much interest will she be paid in the first years?

*December 7, 2010*

**Math**

19+n u#1=19+1 u#1=20 u#50=19+50 u#1=69 50(20+69)/2

*December 5, 2010*

**physics**

when a force of 80n acts on a 500g hockie puck, at what rate will the hockie puck accelerate?

*December 3, 2010*

**physics help me please!**

A certain wave is incident on an interface at an angle of 40 deg. The wave emerges into the other material at an angle of 30 deg. Crossing the interface, the wave: a. increased speed b. reduced speed c. maintained constant d. more info is needed I think reduces its speed, but ...

*November 30, 2010*

**algebra**

I have this problem too! I can't figure it out either. lol

*November 28, 2010*

**Algebra**

find the unit rate for number of parts manufactured per hour if 1630 parts are made in 6 hours. round to the nearest integer. SHOW ALL WORK.

*November 28, 2010*

**Physics**

A plank 2.00 cm thick and 15.0 cm wide is firmly attached to the railing of a ship by clamps so that the rest of the board extends 2.00 m horizontally over the sea below. A man of mass 80.0 kg is forced to stand on the very end. IF the end of the board drops by 5.00cm because ...

*November 17, 2010*

**Physics**

A plank 2.00 cm thick and 15.0 cm wide is firmly attached to the railing of a ship by clamps so that the rest of the board extends 2.00 m horizontally over the sea below. A man of mass 80.0 kg is forced to stand on the very end. IF the end of the board drops by 5.00cm because ...

*November 17, 2010*

**Physics-Please Help Me!!**

5.Assuming the surface tension of water is .073 N/m, what is the force required to overcome the surface tension?

*November 15, 2010*

**physics**

5.Assuming the surface tension of water is .073 N/m, what is the force required to overcome the surface tension?

*November 15, 2010*

**Physics**

5.Assuming the surface tension of water is .073 N/m, what is the force required to overcome the surface tension?

*November 15, 2010*

**Physics**

A flat slab of styrofoam, with a density of 32 kg/m^3, floats on a lake. What is the minimum volume the slab must have so that a 42 kg boy can sit on the slab without it sinking?

*November 15, 2010*

**Chemistry**

Use the given data and calculate the enthalpy change for the following: a) B2O3(s)+3COCL2(g)--->2BCL3(g)+3CO2(g) b)Hg(l) +2Ag+(aq)--->Hg2+(aq)+2Ag(s) compound: B2O3(s) COCL2(g) BCL3(g) CO2(g) Ag+ (aq) Hg2+ (aq) Delta H (standard circle)f kj/mol -1272.8 -218.8 -403.8 -393...

*November 13, 2010*

**physics**

What approximate change in decibles does an observer experience form a sound source if the oberver moves to a new location that is 67% as far from the source?

*November 12, 2010*

**physics**

A series of waves traveling at 200 m/sec are being generated by a 100 Hz source. A point at the very top of the crest of a certain wave is ____ meters from a corresponding point 3 crests away.

*November 12, 2010*

**physics**

A 2000 lb box is being held at rest submerged in water. The box is displacing 2500 lbs of water. When the box is released from its submerged position, the box will a. sink b. rise to the surface and float c. remain where it is d. result unknown

*November 12, 2010*

**physics**

A wave that is travelling due west causes particles of the conducting material to ibrate "north/south". This wave is best described as: a. longitudinal b. transverse c. translute d. permute

*November 12, 2010*

**physics**

You should expect concrete to have an elastic constant that is _____ than wood. a. larger than b. smaller than c. equal to

*November 12, 2010*

**Chemistry**

Calculate the density of F2 gas at 27 degree Celsius and 1.00 atm pressure?

*November 9, 2010*

**Chemistry**

How many calories would be needed to convert 8.0g of ice at 0C to steam at 100C?

*November 9, 2010*

**pscyhology**

everything is right except 1)a 4)a 5)a 14)a 19)d just took test

*November 8, 2010*

**Chemistry**

At 10 degree Celsius a sample of carbon dioxide gas has a volume of 25.5 mL under pressure of 758 mmHg. What would the volume of the CO2 sample be at STP?

*November 5, 2010*

**Chemistry**

Suppose a mixture of hydrogen and oxygen gas is exerting a pressure of 1.60 atm. If the partial pressure of oxygen in the mixture is 304 mmHg atm, what is the partial pressure of the hydrogen?

*November 5, 2010*

**Chemistry**

A rigid container of O2 has a pressure of 3.5 atm at a temperature of 713 K. What temperature would be needed to achieve a pressure of 6.0 atm?

*November 5, 2010*

**PHYSICS**

NEED HELP ON THE ANSWER OF THIS PROBLEM THE EFFICIENCY OF THE PULLEY DECREASES WITH A COEFFICIENT OF FRICTION OF 2.0 THE EFFICIENCY OF THE PULLEY IS 60% WHAT WOULD YOU EXPECT THE EFFICIENCY TO BE IF THE COEFFICIENT OF FRICTION INCREASED TO 0.3

*November 1, 2010*

**manaegerial economics**

iven a firm’s demand function, P = 24 - 0.5Q and the average cost function, AC = Q2 – 8Q + 36 + 3/Q, calculate the level of output Q which a) maximizes total revenue b) maximizes pr

*October 30, 2010*

**5th grade**

2 22 12 132 122 1342? What is next and what is the pattern

*October 29, 2010*

**Chemistry**

6M NaOH**

*October 28, 2010*

**Chemistry**

Calculate the approximate concentration of 41 mL of 6 M diluted to about 0.95 L of water?

*October 28, 2010*

**chemistry**

Should the answer be in molarity, then?

*October 28, 2010*

**chemistry**

What is the concentration of 10g of NaOH dizzolved in 0.95 L of water?

*October 28, 2010*

**science**

What mass of carbon dioxide is produced from the complete combustion of 5.20×10−3 of methane?

*October 28, 2010*

**us history**

False

*October 24, 2010*

**chemistry**

what is the difference between specific heat and heat capcacity?

*October 24, 2010*

**CHEMISTRY**

1.0 g of fat has 9kcal/g, while 1.0 g of carbohydrates and protein have 4kcal/g each, determine the total amount of Calories (kcal) in 1 serving if that serving contains 20.0 g of carbohydrates, 20.0 g of protein and 15.0 g of fat

*October 23, 2010*

**chem**

help with this problem pease Metal Specific Heat (J/g-C) Al (s) 0.900 Au(s) 0.129 Cu(s) 0.385 Fe(s) 0.444 Hg(l) 0.139 H2O(l) 4.184 C2H5OH(l) 2.46 A piece of metal at a temp of 101.0oC and a mass of 86.0 g is dropped into a beaker of water containing 75.0 ml at a temp. of 27....

*October 23, 2010*

**ap chem**

how do you find mole fraction?

*October 21, 2010*

**AP Chem**

Calculate the average kenetic energy of the CH4 molecules in a sample of CH4 gas at 273K and at 546K. So, should I have two answers or one? Super confused

*October 21, 2010*

**Advice**

Many things can contribute to moving... such as better pay, family issues, maybe going off to get more education. The possibilities are endless.

*October 21, 2010*

**managerial economics**

A) Total revenue is the product of the quantity sold and the price at which they were sold. (total revenue) = Q*P = Q*(24 - .5Q) = -.5Q^2 + 24Q This quadratic function will have a maximum at Q = -24/(2*(-.5)) = 24 Total revenue will be maximized when Q = 24. B) The profit on ...

*October 19, 2010*

**Chemistry**

What is the empirical formula for Dichloroethane?

*October 18, 2010*

**chemistry**

At what temperature (C) will a gas sample occupy 6.1 L if it originally occupies 17.8 L at 27.1C? T1V1=T2V2 T1(6.1)=(17.8)(300.25) T1=876? Please check my answer

*October 17, 2010*

**chemistry**

At what temperature (C) will a gas sample occupy 6.1 L if it originally occupies 17.8 L at 27.1C? T1V1=T2V2 T1(6.1)=(17.8)(300.25) T1=876? Please check my answer

*October 17, 2010*

**Chemistry**

How many grams of KCl would be formed in the reaction of 3.000 g of K2CO3 and HCl?

*October 17, 2010*

**Chemistry**

How many milliliters of 6.0 M HCl would be needed if 3.000 g of K2CO3 were used in an experiment?

*October 17, 2010*

**Chemistry**

What is the balanced equation for the reaction of 3.000 g of K2CO3 and HCl?

*October 17, 2010*

**English 2**

Need help with the same questions

*October 17, 2010*

**chemistry**

What volume (in Liters) of oxygen must react to form 17.0L of carbon dioxide according to the following balanced equation: 2CO(g) + O2(g) --> 2CO2(g) is this correct C G02 2

*October 16, 2010*

**chem**

Lithium hydride reacts with water as follows. LiH(s) + H2O(l) -->LiOH(aq) + H2(g) During World War II, U.S. pilots carried LiH tablets. In the event of a crash landing at sea, the LiH would react with the seawater and fill their life belts and lifeboats with hydrogen gas. ...

*October 16, 2010*

**chem**

A 31.2 cm3 bubble of air at 1.4 atm pressure is subjected to a new pressure of 3.9 atm. What will be the new volume (cm3)? Assume constant temperature. THe answer I got was 11.2 cm3 is this correct

*October 16, 2010*

**Chemisrty**

Calculate the work done when 60.0 g of tin dissolves in excess acid at 1.00 atm and 20°C. Assume ideal gas behavior.

*October 14, 2010*

**chemistry**

how many moles of ions are released when 1.6 mol of ammonium phosphate is dissolved in water?

*October 10, 2010*

**physics**

Sorry for so many posts, but you would not use delta v/ delta t to find acceleration. correct? on the graph it shows that at 1.1 second the graph changes directions therefore the slope of the tangent line at that point is equal to zero. I plugged it into the formula you gave ...

*October 10, 2010*

**physics**

Oh okay, thank you. The only thing included was a graph giving the points t=0s, speed= 0cm per second; t= .5s, speed= 15cm per second; t=1.1s, speed =28cm per second; t=1.6s, speed=6cm per second.

*October 10, 2010*

**physics**

The figure below shows the speed of a person's body as he does a chin-up. Assume the motion is vertical and the mass of the person's body is 73.4 kg. Determine the force exerted by the chin-up bar on his body at the following times. t=0s, speed= 0cm per second; t= .5s...

*October 10, 2010*

**physics**

The next thing I tried was to solve for T from by fbd. I got T=m1g-m1a for the first mass, then T1-T2=-fk*m2g+m1a for the second, and T=m3g+m3a. I don't know if this is right or not. Since I am trying to find the acceleration of each mass can i set these equations equal to...

*October 9, 2010*

**physics**

Im sorry, m1 is suspended by a pulley and string on the left side, m2 is on the table connected to the pulley by a string in the middle and m3 is suspended on the right side by a pulley and string which is also connected to m2. I am pretty sure I need to find an equation in ...

*October 9, 2010*

**physics**

Three blocks are connected on the table as shown below. The coefficient of kinetic friction between the block of mass m2 and the table is 0.400. The objects have masses of m1 = 3.00 kg, m2 = 1.45 kg, and m3 = 1.90 kg, and the pulleys are frictionless. Determine the ...

*October 9, 2010*

**2nd grade math**

Shawn is writing down the family recipes in a cookbook. He has 21 recipes left to write down. He has 3 pages left to fill up. If he wants to put the same number of recipes on every page, how many goes on each?

*October 7, 2010*

**Physics**

It actually wants to find how far you could climb with a penny.

*October 5, 2010*

**Physics**

Assuming 100% of your energy can be converted to electrical power, and electricity costs $0.10 for 1 kilowatt-hour, how high should you climb to make one penny's worth of electricity? Show all work & units. I have 288.8 watts, and that's as far as I have been able to ...

*October 5, 2010*

**calculus**

differentiate f(x)=Tan^3(e^2x +1)

*October 5, 2010*

**Math**

"Kids have done bunches (of) dumb (and) clumsy mistakes" is how I remember it. Say, if you were trying to figure this problem out: 1000 mL = ___ L. "milli" is the last M. Say that's the decimal point. To get to L (base, or the middle of the letters, ...

*October 5, 2010*

**Science**

A current of 7.50 amperes flows through an air conditioner. If the volyage in the wall outlet is 110 volts, what is the resistance in the air conditioner?

*October 5, 2010*