Wednesday

July 30, 2014

July 30, 2014

Total # Posts: 73

**Acc. PreCalculus **

1.A boy has 5 vests and 3 jackets. How many outfits can he wear if he wears both a vest and a jacket?How many outfits can he wear if he wears either a vest or a jacket? 2.If you roll two sided dice what is the probability of getting a 9? What is the probability of getting a di...

**PreCalculus**

Sorry it's actually equal to 1 not 0

**PreCalculus **

y^2/25-x^2/9=0 What is the polar equation that is equivalent to the rectangular equation?

**Chemistry**

The voltage generated by the zinc concentration cell described by, Zn(s)|Zn2 (aq, 0.100 M)||Zn2 (aq, ? M)|Zn(s) is 21.0 mV at 25 °C. Calculate the concentration of the Zn2 (aq) ion at the cathode.

**Pre-calc**

2x^2 - 12x - 3y^2 - 24y +60 = 0

**social studies **

how was the south carolina constitution of 1868 different from earlier versions?

**Physic A Level **

A lift cable which is 50m long ,is made from high tensile steel of Young Modulus 2.0x 10^11 Pa. the cable is made from 100 wires each of radius 2.0mm . Calculate the extra extension in the cable when 10 passengers pile into the lift ,the total mass of the passenger is 500kg .

**Science!!!!**

yes they are all correct (:

**physical**

A bicycle and its rider together has a mass of 95 kg. What power output of the rider is required to maintain a constant speed of 4.8 m/s (about 10.7 mph) up a 5.0% grade (a road that rises 5.0 m for every 100 m along the pavement)? Assume that frictional losses of energy are n...

**maths**

the solution set for the following 1.X3+x2-6x-10=0 2.2x2-4x-4=0 3.x4-x3-4x2+x+1=0

**physics**

a ball is thrown at a vertical velocity to an angle of 30 degree above the horizontal and rises to a maximum height of 50 meters.if the angle is tripled find the maximum height and the horizontal range of a projectile for the same intial velocity

**Organic chemistry plz help me out (thanks)**

1) a) What is the normail boiling point (760 mm Hg) for a compound that boils at 150 degree celsius at 10 mm Hg pressure? b) At which temperature would the compund in (a) boil if the pressure were 40 mm Hg? c) A compound was distilled at atmospheric pressure and had a boiling ...

**Science**

Yes the answers are b and c :)

**Science**

Yes the answers are b and c :)

**Science**

Yes the answers are b and c :)

**Science**

Yes the answers are b and c :)

**Health **

Ms.Sue can u please answer my question.

**Health **

I need to interview an adult about how health care changed in their lifetime. I don't have anyone to interview so can someone that is an adult can you please tell me how health care have changed. Medical Advances Changes in Cost Changes in the relationship with health care...

**Physics**

Thank you :)

**Physics**

What is the momentum of a wavelength= 0.015nm X-ray photon? p= in kg*m/s Please help I am confused. Thank you.

**Physics**

Photons of energy 12eV are incident on a metal. It is found that current flows from the metal until a stopping potential of 8.0V is applied. If the wavelength of the incident photons is doubled, what is the maximum kinetic energy of the ejected electrons? What is KEmax in eV. ...

**Physics Please COULD SOMEONE HELP ME ASAP PLZ**

When an object is placed 55.0cm from a certain converging lens, it forms a real image. When the object is moved to 45.0cm from the lens, the image moves 6.00 cm farther from the lens. Find the focal length of this lens? Please someone help me out I tried so many times i keep g...

**PHYSICS PLEASE SOMEONE HELP ME OUT **

When an object is placed 55.0cm from a certain converging lens, it forms a real image. When the object is moved to 45.0cm from the lens, the image moves 6.00 cm farther from the lens. Find the focal length of this lens? Please someone help me out I tried so many times i keep g...

**PHYSICS PLEASE HELP ASAP**

When an object is placed 55.0cm from a certain converging lens, it forms a real image. When the object is moved to 45.0cm from the lens, the image moves 6.00 cm farther from the lens. Find the focal length of this lens? Please someone help me out I tried so many times i keep g...

**PHYSICS PLEASE HELP ASAP**

I found this equation 5380di^2+600di+33000=0 and when i solve i got an imaginary number I had a hard time solving it so could you please help me out

**PHYSICS PLEASE HELP ASAP**

When an object is placed 55.0cm from a certain converging lens, it forms a real image. When the object is moved to 45.0cm from the lens, the image moves 6.00 cm farther from the lens. Find the focal length of this lens? Please someone help me out I tried so many times i keep g...

**pre calculus**

for the given function f and g, find the specified value of the function. State the domain: f(x)=2x-5; g(x)=7x-9 a. (f-g)(x)= b.(f/g)(x)= I need help!

**math pre calculus**

find the following for the function f(x)=(x+5)^2(x-2)^2 a.find the x and y intercepts, b.find the power function that the graph ressembles for large values of x c.determine the maximum number of turning points on the graph of f d.determine the behavior of the graph of f near e...

**chemistry HELP plz!**

Thanks!

**chemistry HELP plz!**

The species __________ contains 16 neutrons. a. 16O b. 31P c. 34S2- d. 80Br- e. 36Cl

**ELA**

We have to write a paper about seashells,sunglasses,and sunscreen My cousins and I went to the beach last summer and we brought things top lay with there like our beach ball and water guns then we put on our suncreen and sunglasses before going in the water.We played games in ...

**calculus**

3x^2+x+2=0

**calculus**

find a square root of -7-24i

**health**

I'm doing a health project on family. My question is how does your dad support you? I need ideas thank you

**help for homework **

can you correct that for me pleas? Have you ever sat in a classroom and observed the conversational styles of the students? Nowadays many people flying to another language because several reasons such as study , business, or even Tourism. However, When they travel to face diff...

**algebra**

A poll estimates that 43% of likely voters are in favor of additional restrictions on teenage drivers. The poll has a margin of error of plus or minus 4%. Write and solve an absolute value equation to find the minimum and maximum percent of voters that actually support the res...

**math**

A poll estimates that 43% of likely voters are in favor of additional restrictions on teenage drivers. The poll has a margin of error of plus or minus 4%. Write and solve an absolute value equation to find the minimum and maximum percent of voters that actually support the res...

**psychology**

Tranquilizing drugs that inhibit sympathetic nervous system activity often effectively reduce people's subjective experience of intense fear and anxiety. Use one of the major theories of emotion to account for the emotionreducing effects of such tranquilizers. Which theory...

**math**

PLEASE HELP ME. 1/5 of bees flew to a cherry tree, 1/3 flew to a clover tree, and 3 times the difference of these 2 numbers buzzed over to a stand of heather. 3 flew around the hive circling and protecting the bee community. The question is, how many bees were there altogether?

**division**

uirt

**physics**

You are the technical consultant for an action-adventure film in which a stunt calls for the hero to drop off a 18-m-tall building and land on the ground safely at a final vertical speed of 5 m/s. At the edge of the building's roof, there is a 100-kg drum that is wound wit...

**physics**

A flywheel with a diameter of 1 m is initially at rest. Its angular acceleration versus time is graphed in the figure. (a) What is the angular separation between the initial position of a fixed point on the rim of the flywheel and the point's position 8 s after the wheel s...

**physics**

A ball of mass m = 0.2 kg is attached to a (massless) string of length L = 3 m and is undergoing circular motion in the horizontal plane, as shown in the figure. What should the speed of the mass be for θ to be 46°? What is the tension in the string?

**physics**

Two instruments are playing musical note "A" (440 Hz). A beatnote with a frequency of 2.5 Hz is heard. Assuming that one instrument is playing the correct pitch, what is the frequency of the pitch played by the second instrument?

**Chemistry**

Explain the important conditions when you crystallize a solid by crystallization.

**Biology**

Explain why would there be more white blood cells found in a person's body who is infected by salmonella bacteria rather than a healthy person?

**Physics**

The 2500 kg cable car shown in the figure below descends a 200 m high hill. In addition to its brakes, the cable car controls its speed by pulling an 1200 kg counterweight up the other side of the hill. The rolling friction of both the cable car and the counterweight are negli...

**English-Their Eyes Were Watching God**

Why do you think Starks puts the street lamp on a showcase for a week and then throws a big celebration for its lighting ceremony?

**ChemISTRY (WEBWORK)**

A student measures the potential for cells containing A+B+and C+ ions and their metals and records his data in the table below: ............. Overall Reaction ................Potential (V) Cell#1'''''''A(s) A+(aq) B+(aq) B(s)'''''...

**Physics**

Suppose a charge q is placed at point x = 0, y = 0. A second charge q is placed at point x = 6.2 m, y = 0. What charge Q must be placed at the point x = 3.1 m, y = 0 in order that the field at the point x = 3.1 m, y = 4.2 m be zero?

**Physics**

A certain capacitor stores 360 J of energy when it holds 9.1 10-2 C of charge. (a) What is the capacitance of this capacitor? µC (b) What is the potential difference across the plates? V

**Physics**

Two metal spheres are separated by a distance of 1.1 cm and a power supply maintains a constant potential difference of 710 V between them. The spheres are brought closer to each other until a spark flies between them. If the dielectric strength of dry air is 3.0 106 V/m, what...

**math pre-ALG**

how to write 72,700 in word form

**Physics**

Is the total charge 3.0 x 10^-6 C?

**Physics**

How many electrons make up a charge of -30.0 ìC?

**PHYSICS**

Thank you so much! Makes perfect sense =D

**PHYSICS**

A curve in a road forms part of a horizontal circle. As a car goes around it at constant speed 14.0 m/s, the total force exerted on the driver has magnitude 115 N. What are the magnitude and direction of the total vector force exerted on the driver if the speed is 25.0 m/s ins...

**PHYSICS**

A bolt drops from the ceiling of a train car that is accelerating northward at a rate of 3.15 m/s2. What is the acceleration of the bolt relative to the train car? I don't understand how to do this problem at all... and why isn't it zero? It seems if the train is going...

**PHYSICS**

super easy (I think) but I must be missing some concept... A race car starts from rest on a circular track. The car increases its speed at a constant rate at as it goes 5.00 times around the track. Find the angle that the total acceleration of the car makes with the radius con...

**alegbra**

2y + 1 < -3 -1 -1 2y < -4 divide each side by two y < -2

**alegbra**

2y + 1 < -3 -1 -1 2y < -4 divide each side by two y < -2

**alegbra**

2y + 1 < -3 -1 -1 2y < -4 divide each side by two y < -2

**8th Grade Algebra**

is the common solution then (7,4) ?

**8th Grade Algebra**

How can you tell if these three equations have a common solution? 3x - 5y = 1 4x - y = 24 2x - 3y = 2 Please help ?

**Chemistry**

oh ok, I solved it, thank you very much! :]

**Chemistry**

The element copper, found in nature with an average atomic mass of 63.54u, consists of two isotopes, copper-63 of atomic mass 62.93u and copper-65 of atomic mass 64.93u. Calculate the abundance of each isotope. I can't come up with an equation to solve it; can someone plea...

**economics**

Provide a real-world example of a product (a good or service) that has either an external cost or external benefit associated with it and propose a government policy to adjust for the over- or underproduction of this product.

**economic**

Do a google search on the concept of a “flat tax.” Explain how this tax scheme works and does it meet the criteria of tax efficiency and tax fairness/equity?

**economics**

Assume that the demand for gasoline is inelastic. The government imposes a sales tax on gasoline. The tax revenue is used to fund research into clean fuel alternatives to gasoline, which will improve the air we all breathe. a. Who bears more of the excess burden of this tax: c...

**Math**

add. 4 1/7 + 1 1/2=

**business**

Congratulations! You have decided to start a new business! You will begin a partnership with one other business associate that you trust and have known for several years. You plan to hire three managers and another twenty employees. Discuss a plan of action that you and your p...

**economics**

i agree

**Economics**

Economic profit that is less than zero

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