Thursday

May 28, 2015

May 28, 2015

Total # Posts: 3,290

**physics**

lava ball is shot straight up at 28m/s what is speed after 3 seconds
*February 1, 2011*

**Math**

Algebra 2: How do I factor this expression? 4x^4-6x^2+2
*February 1, 2011*

**Basic Math**

Ah... The light just went on... 24!
*January 31, 2011*

**Basic Math**

But the question asks "how many nights will it be before they are both off again" so would the answer be... Bill 6 and Sue 8? Thanks.
*January 31, 2011*

**Basic Math**

I think the LCM is 6...? Wouldn't it be that they will never have the same day off again because one has a day off every 6 and the other 8th day?
*January 31, 2011*

**Basic Math**

Bill and Sue both work at night. Bill has every sixth night off and Sue has every eighth night off. If they are both off tonight, how many nights will it be before they are both off again?
*January 31, 2011*

**Math (Algebra 2)**

Factoring by Using a Quadratic Form Problem: x^4 + 8x^2 - 20 What I have so far: (x^2)^2 + 8(x^2) - 20 a^2 + 8a - 20 For some reason my textbook says to substitute the (x^2) with (a) as you can see in the las step. The next step after that is factoring [a^2 + 8a - 20].
*January 31, 2011*

**math**

45/72 = 0.625 Divide 45 by 72 on a calculator.
*January 31, 2011*

**math**

4/9
*January 31, 2011*

**Math**

(Factoring a sum or difference of cubes) and (solving a polynomial equation). 2x^3+2=0
*January 31, 2011*

**eee**

the market mix
*January 31, 2011*

**social studies**

A study of the causes of the American Revolution of 1776, the French Revolution of 1789, and the Russian Revolution of 1917 best supports the generalization that revolution is most likely to occur when 1. those in power are resistant to change 2. a society has a lower standard...
*January 31, 2011*

**Trigonometry**

Suppose the angle formed by the line 14y = 23x and the positive x-axis is è. Find the tangent of è.
*January 31, 2011*

**market**

Tesla, a new firm that makes an electric sports car, estimating how many competitors will make electric vehicles and what kinds they will make, is:
*January 30, 2011*

**math**

write an equation that represents the problem.The automatic tennis server holds 110 balls that shoot out one at a time.Andres 3 friends took turns hitting 27 balls each.Andre hit the remaining balls.How many balls did Andre hit?
*January 27, 2011*

**English**

How does the quotation -A lie told often enough becomes the truth- by Lenin relate to A Street Car Named Desire by Tennessee Williams and Death of a Salesman by Arthur Miller
*January 27, 2011*

**English**

How does this quotation - Man's best possession is a sympathetic wife - by Euripides (484 BC - 406 BC), Antigone relate to A Street Car Named Desire by Tennessee Williams and Death of a Salesman by Arthur Miller
*January 27, 2011*

**Math**

For each of the following decimal numbers, give the place value of the underlined digit. 97,998 (the line is under the 7) Thank you!
*January 24, 2011*

**College Chemistry**

What volume of CH4 at 0 °C and 1.20 atm contains the same number of molecules as 0.16 L of N2 measured at 23 °C and 1.50 atm?
*January 23, 2011*

**chemistry**

what mass of steam intially at 130 degree celcius is needed to warm 200 grams of water in a 100 gram container from 20 to 50 degree celcius
*January 20, 2011*

**College Physics**

Starting from rest, the car is going 39 ft/s (27 mi/h) at the end of 5.0 s. What is the car's average acceleration in ft/s2
*January 19, 2011*

**math**

Use 3.14 for pi and round to the nearest hndredth. If r=7m, then d= ?, and c= ?
*January 18, 2011*

**math**

determine the sum of the following geometric series a. -1/32+1/16-...+256 b. 50 over sigma 8(.5)^n-2
*January 18, 2011*

**math**

determine the sum of the following geometric series a. -1/32+1/16-...+256 b. 50 over sigma 8(.5)^n-2
*January 18, 2011*

**math**

the following table gives the amount of money john made selling ice cream treats during the local exhibition. determine the mean and standard deviation of john's income for these 11 days. round answer to nearest cent. day: 10 11 12 13 14 15 16 17 18 19 20 income: 65 56 75 ...
*January 18, 2011*

**Math**

If find RX = 2y + 2x, TX = 3y - 1, and SU = 28, FIND THE VALUES OF X AND Y
*January 17, 2011*

**Math**

How do you explain to 6 year old what a rectangular coordinate system is and why it is important in math. What information is needed to locate a point in this system? And how does this relate to mapping and finding a point on a map.
*January 16, 2011*

**geography**

In three paragraphs choose one county in Europe you could live in. Tell why
*January 15, 2011*

**math**

sparky weighs 3/4 of her weight, plus 3/4 a pound. how much does she weigh?
*January 13, 2011*

**physics**

the frequency of yellow lights is 5.00 x 10^14 Hz. if it travels through space (where v= 3.00 x 10^8m/s) find the wavelength of this light.
*January 13, 2011*

**Micreconomics**

Using a supply and demand diagram, illustrate the impact of each of the following on price and quanity demanded: a. Improvements in transportation lower the cost of importing oil into the United States of the 1960. b. After the 1973 war, oil producers cut oil production ...
*January 12, 2011*

**math **

HEYY CAN Y SPARE THE EQUATIONS TWO
*January 12, 2011*

**biology**

Can you help me find an everyday object that has a similar function as : 1-Golgi Bodies an example 2-Lysosome an example kitchen garberator 3- peroximes example a gym 4-Vesicules/vacuoles an example water bottle 5-Cytoskeleton an example 6-Microvilli an example 7- Cilia an ...
*January 12, 2011*

**Biology/help please**

how about the rest any help or ideas
*January 12, 2011*

**Biology/help please**

Can you help me find an everyday object that has a similar function as : 1-Golgi Bodies an example 2-Lysosome an example kitchen garberator 3- peroximes example a gym 4-Vesicules/vacuoles an example water bottle 5-Cytoskeleton an example 6-Microvilli an example Can you help me...
*January 12, 2011*

**Anatomy and Physiology**

IS this right thank you! Ovaries and testes are considered components of which system? I got C reproductive system endocrine system both A and B none of the above
*January 12, 2011*

**Dressmaking**

But like where am I supposed to find this stuff out? They just gave me online exams and no information whatsoever about these things.
*January 12, 2011*

**Dressmaking**

They threw me in this class & I know nothing about sewing..im a guy lol. please help me? Ms. Troy would like you to make a copy of an outfit that she owns and really likes—a sleeveless dress with a short-sleeve jacket. She has selected a lilac linen fabric that comes in ...
*January 12, 2011*

**Math**

Thank you, I understood your first post. Good luck Will.
*January 12, 2011*

**Math**

If the lengths of two bases of a trapezoid are 10m and 16m respectively, then what is the length of the median
*January 12, 2011*

**Russia Government**

I was checking to see if my question had been answered on steps in doing a report on the Russia Government.
*January 12, 2011*

**Russia Government**

Need steps in doing a report on Russia government.
*January 12, 2011*

**government**

I am 7th grade. My report is on Russia government. How do you do a report on the Russia Gov't. I need steps to take in setting up a report on this subject.
*January 11, 2011*

**physics**

The following wave function represents a travelling wave: y = 3.45 / [6.35 + (6.35x−8.30 t )2] where y and x are in cm, and t is in seconds. a). What is the maximum displacement of the wave at t = 7.50 s ? b). what is the wave velocity? please explain more
*January 10, 2011*

**physics**

The following wave function represents a travelling wave: y = 3.45 / [6.35 + (6.35x−8.30 t )2] where y and x are in cm, and t is in seconds.a) What is the maximum displacement of the wave at t = 7.50 s ? b) what is the velocity.
*January 10, 2011*

**Physics**

The 636 N weight held by two cables. The left-hand cable had tension 840 N and makes an angle of θ with the wall. The right-hand cable had tension 890 N and makes an angle of θ1 with the ceiling. a) What is the angle θ1 which the right-hand cable makes with ...
*January 9, 2011*

**Physics**

A player strikes a hockey puck giving it a velocity of 47.673 m/s. The puck slides across the ice for 0.175 s after which time its velocity is 46.473 m/s. The acceleration of gravity is 9.8 m/s2 . The mass of the puck is 185 g. If the puck strikes the goalie’s pads and ...
*January 9, 2011*

**Physics**

The 636 N weight held by two cables. The left-hand cable had tension 840 N and makes an angle of θ with the wall. The right-hand cable had tension 890 N and makes an angle of θ1 with the ceiling. a) What is the angle θ1 which the right-hand cable makes with ...
*January 9, 2011*

**Physics**

The average speed of a Nitrogen molecule in air is about 858 m/s, and its mass is about 4.68 × 10−26 kg. If it takes 2.6 × 10−13 s for a nitrogen molecule to hit a wall and rebound with the same speed but in the opposite direc- tion, what is the ...
*January 8, 2011*

**Physics**

The average speed of a Nitrogen molecule in air is about 858 m/s, and its mass is about 4.68 × 10−26 kg. If it takes 2.6 × 10−13 s for a nitrogen molecule to hit a wall and rebound with the same speed but in the opposite direc- tion, what is the ...
*January 8, 2011*

**English**

How do any of the quotes below relate to the play A Street Car Named Desire by Tennessee Williams A good reputation is more valuable than money. Publilius Syrus (~100 BC), Maxims For all their strength, men were sometimes like little children. Lawana Blackwell, The Dowry of ...
*January 8, 2011*

**smith**

tom can mow a lawn in 4 hours. perry can mow the same lawn in 5 hours. how long for them to mow the lawn together?
*January 6, 2011*

**spanis PLEASE PLEASE HELP !**

Your friend asks you questions about everything he sees. Answer his questions as indicated. example: Es la casa de Manolo? Si, es su casa ES la casa de susana? No, no es su casa. 1) Son los hermanos de Anita Si, son sus hermanos 2)Son los padres de Felipe? No, no son sus ...
*January 5, 2011*

**spanish/help please**

Your friend asks you questions about everything he sees. Answer his questions as indicated. example: Es la casa de Manolo? Si, es su casa ES la casa de susana? No, no es su casa. 1) Son los hermanos de Anita Si, son sus hermanos 2)Son los padres de Felipe? No, no son sus ...
*January 5, 2011*

**algebra **

solve and give two answers X^2=44
*January 5, 2011*

**history**

How did Mikhail Gorbachev’s policies contribute to the end of the Cold War?
*January 4, 2011*

**Math**

Find an algebraic expression for f' f(x)= 2e^x+ pi f(x)=e^5-4e^x f(x)=e^x+x^e+e f(x)= e^pi +pi^x+ x^pi I didn't understand these at all
*January 3, 2011*

**math**

What I have found is that counters are inch diameter circles children use to visual help count so your child has to draw circles in the boxes that correspond to the number if it says 3 the your child makes 3 circles one in each box
*January 3, 2011*

**french**

what does Est-ce que les lunettes de soleil vont bien à dylan hayes mean???
*December 29, 2010*

**PHYSICS**

ummmm dude i did that it came out like . something . like what do you mean convert N?. please explain thankyou
*December 20, 2010*

**PHYSICS**

an arctic flying to antarctica encounters a storm. The term changes direction to fly around the storn. if the tern flies 46 km at 15degrees south of east , 22 km at 13 degrees east of south , and finally 14km at 14 degrees west of south what is the tern's resultant ...
*December 20, 2010*

**Physics**

Given that electricity is priced at constant 13.5 pence per kWh and central heating oil (kerosine) varies in price between 39 pence and 137 pence per litre. What price does kerosine need to be to make heating domestic hot water cheaper using an immersion heater? Assume oil ...
*December 20, 2010*

**industrial hygiene**

A worker is exposed to a hazardous material at a level that is about 2/3 of the allowable limit, yet is reporting symptoms consistent with exposure to the material. Explain this in terms of exposures and exposure limits, absorbed dose, sampling and analysis, individual factors...
*December 18, 2010*

**Physics**

tm= tp/√(1-(v2/c2)) (1.5*10-8) = tp/√(1-((2*108)2/(3*108)2)) (1.5*10-8) = tp/√(1-((4*1016)/(9*1016)) (1.5*10-8) = tp/√(1-(4/9)) (1.5*10-8) = tp/√(5/9) tp =(√(5)/3)(1.5*10-8) tp =1.118033989*10-8 on the 6th line, why does it become √(5...
*December 14, 2010*

**Calculus**

so is it a stationary point then?
*December 14, 2010*

**Calculus**

but why is it not a minimum?
*December 14, 2010*

**Calculus**

thats supposed to be f(c)
*December 14, 2010*

**Calculus**

True or false If f'(c) = 0 and f9c0 is not a local maximum, then f(c) is a local minimum.
*December 14, 2010*

**physics**

Thanks a lot!
*December 13, 2010*

**physics**

a popgun uses a spring for which k = 20 N/cm. when cocked, the spring is compressed 3.0 cm. how high can the gun shoot a 5.0-g projectile
*December 13, 2010*

**physics**

a 500-g mass is attached to the end of an initially unstretched vertical spring for which k=30 n/m. the mass is then released, so that it falls and stretches the spring. how far will it fall before stopping? (the PEg lost by the mass must appear as PEe)
*December 13, 2010*

**Precalculus**

A tower casts a 235-foot-long shadow. If the angle of elevation from the tip of the shadow to the top of the tower is 66.3°, how high is the tower?
*December 13, 2010*

**math**

Convert 2 PSI to inches of H20.
*December 11, 2010*

**math**

Me too!
*December 11, 2010*

**math**

If a tank were blocked in (all inlets and outlets are closed) late in the evening with a temperature of 62F a pressure gauge attached to it would read an ambient pressure (14.7 PSIA). The next day, as the sun begins to shine directly on the tank, its inside temperature would ...
*December 11, 2010*

**chemistry**

a liquid that has a density of 22 g/mL and a mass of 16 g, how much of the liquid do you have in the container?
*December 11, 2010*

**health**

can you explain the question atleast?
*December 11, 2010*

**health**

how do you feel the portrayal of sex in the media influences the sexual desicions teens make today
*December 11, 2010*

**Physics**

An engineer claims to have measured the characteristics of a heat engine that takes in 130J of thermal energy and produces 40J of useful work. What is the smallest possible ratio of the temperatures (in kelvin) of the hot and cold reservoirs?
*December 10, 2010*

**Physics**

The oven draws 1100W of power, and you have determined that it heats with an efficiency of 51%. Using this information, determine the time t it would take to bring 240mL of water from 25C to 100C . Note that 4.2 J of energy is required to raise the temperature of 1.0mL of ...
*December 10, 2010*

**history**

how did former president nixon pardon impact the united states?
*December 9, 2010*

**ALgebra word problem**

sorry. i dont really know
*December 8, 2010*

**ALgebra word problem**

one number is 6 more than another. their product is 91. what is the number?
*December 8, 2010*

**Find the maximum value of this function**

f(x) = 9 sqrt(x)e*(-x)
*December 8, 2010*

**algebra**

the length of a pool is 30 meters greater than the width. if the area is 1000 square meters, find the dimensions of the pool.
*December 7, 2010*

**Spanish**

14. c 15. i think its a
*December 7, 2010*

**algebra**

1. 100x^2-9 2. 8x^2+14x+6
*December 7, 2010*

**math**

Consumers pay for electricity by the kilowatt-hour (the amount of electricity used by a 1,000-watt appliance in one hour). If electricity costs 10cents per kilowatt-hour, what is the cost of running a 100-watt lamp for 1. 1 hour? 2. 24 hours? 3. 1 year?
*December 7, 2010*

**Math**

Consider the equation below. (Round the answers to three decimal places. If you need to use -infinity or infinity, enter -INFINITY or INFINITY.) f(x) = 9 sqrt(xe*^(-x) (a) Find the interval on which f is increasing. ( , ) Find the interval on which f is decreasing. ( , ) (b) ...
*December 6, 2010*

**math**

A ball is dropped from a height of 5 ft. Assuming that on each bounce the ball rebounds to one-third of its previous height, find the total distance travelled by the ball.
*December 6, 2010*

**Evaluating limits**

Evaluate the limit. (If you need to use - or , enter -INFINITY or INFINITY.) lim x +sin(x)/(2x+cos(x)) as x goes to 0.
*December 6, 2010*

**L'hospital rule**

Evaluate the limit. lim (cos(x))^(7/x^2) as x goes x-->0^+
*December 6, 2010*

**Chemistry!**

PV=nRT should be used
*December 6, 2010*

**math**

If a normal studentblinks 25 times per minute how old yould you be your next birthday?
*December 6, 2010*

**math**

the remainder is 3 and the answer is 44
*December 6, 2010*

**algebra**

1) 27x^3+8 2) 3x^2-x-4
*December 6, 2010*

**algebra**

Add. 5x^2-8x^3+3x-2 and 4x^3+5x^2+9-x
*December 6, 2010*

**Math**

12y^2+16-13 I cant seem to get the right answer please help
*December 6, 2010*

**algebra**

LOG5(X+7)=LOG3(X-4)+LOG3(X_2-LOG3 X=
*December 5, 2010*

**algebra**

(a-b)(a^2+ab+b^2)
*December 5, 2010*