Thursday

April 24, 2014

April 24, 2014

Total # Posts: 712

**calculus**

Find the equation of the line l, given that f(x)=10^x and the point A is at x=logbase10(4).

**Math**

What is the LCM of 3(t-7) and 21(t-7)? I am struggling with this!

**AP Physics B**

An object of mass 3.2 kg is allowed to fall from rest under the force of gravity for 3.5 s. What is the change in its momentum? Ignore air resistance.

**chemistry**

PH3 has a mass of 17.33 grams, what is the mass in grams of H2 produced? 4 PH3 -> P4 + 6 H2

**physics **

A set of crash tests consists of running a test car moving at a speed of 11.6 m/s (25.5 m/h) into a solid wall. Strapped securely in an advanced seat belt system, a 61.0 kg (134.2 lbs) dummy is found to move a distance of 0.750 m from the moment the car touches the wall to the...

**physics **

Two blocks are arranged. The pulley can be considered to be massless, and friction is negligible. M1 is four times more massive than M2. (m1 is on the table and m2 is hanging from the pulley). If the system is released from rest, how far will M1 travel in 0.963 s?

**physics **

A 6.00 kg block located on a horizontal frictionless floor is pulled by a cord that exerts a force F=14.1 N at an angle θ= 19.0° above the horizontal, as shown. What is the speed of the block 3.50 seconds after it starts moving?

**college**

People often make career changes in their lives. How would the humanistic theory of behavior explain this phenomenon?

**Physics**

Mass of gold in rock = 11.333 kg Therefore rock is 76.58% gold

**chemistry**

Three gases (8.00 of methane, 18.0 of ethane, and an unknown amount of propane, were added to the same 10.0-L container. At 23.0 C , the total pressure in the container is 3.60 atm. Calculate the partial pressure of each gas in the container.

**Physics**

A 20 kg bag of luggage is rolled across a horizontal floor by a force of 50 N applied to the handle which makes an angle of 65 degrees with the horizontal. If the bag moves at constant speed, what is the coefficient of friction between the bag and the floor?

**Physics**

A 20 kg bag of luggage is rolled across a horizontal floor by a force of 50 N applied to the handle which makes an angle of 65 degrees with the horizontal. If the bag moves at constant speed, what is the coefficient of friction between the bag and the floor?

**Accelerated Physics**

An 18.0 kg box is released on a 35.0° incline and accelerates down the incline at 0.269 m/s2. Find the friction force impeding its motion. How large is the coefficient of friction?

**math**

How many different combinations of coins can total exactly $0.40? I got 31 possible combinations

**english**

so i am really confused if this is a hyperbole: the tattoo killed him. i am reading the same book as another girl called the barcode tattoo and i am in need of some hyperboles for my project. please tell me if that quote: the tatoo killed him, is an hyperbole. thank you

**geometry**

The points L(4, 0),M(10, 0), and N(7, 5) form #LMN.What is the sum of the slopes of the three sides of the triangle?

**physics**

Most sphygmomanometers use mercury. How tall would the manometer tube need to be if it were filled with water instead? It might need to measure a blood pressure as high as 300 mm Hg.

**Math**

f of g of x

**Math**

f(x)= 4-x^2 and g(x)= sqrt (x) find the implied domain of fg(x) fg(x)= f(sqrt(x)) fg(x)= 4-(sqrt(x))^2 fg(x)=4-(sqrt x)(sqrt x) fg(x)=4-x domain= (x:x=all real numbers) Am I correct?

**Mathematics for Liberal Arts**

infinites absolute value symbol l l First look at some small finite sets: Let A={1,5,9} B={U,V,W,X,Y,Z} C={Barrak Obama, Joe Biden, Hillary Clinton} Fill in the blanks with one of the symbols <,>,= lAl lBl lAl lCl lAl lAl lBl lCl Describe how you decided the comparative ...

**Math**

Find the domain of the function sqrt(4-x^2). I tried it not sure if i'm correct 4-x^2>= 0 -x^2>=-4 x^2<=4 x<=2,x>=-2 Am I correct?

**Mathematics for Liberal Arts**

absolute value symbol l l First look at some small finite sets: Let A={1,5,9} B={U,V,W,X,Y,Z} C={Barrak Obama, Joe Biden, Hillary Clinton} Fill in the blanks with one of the symbols <,>,= lAl lBl lAl lCl lAl lAl lBl lCl Describe how you decided the comparative sizes of A...

**Chemistry**

7.72 g of CuBr2 contains how many bromide (Br-) ions?

**Pharmacology**

9.) is C. Caffeine enhances vasoconstriction and ergotamine absorption

**physics**

Remember that momentum is conserved. Momentum (P) = m*v so find P of the satelite (0.24 m/s * 1,300 kg) and then set that equal to the P of the astronaut (82kg * v). Solve for v. V should have the units m/s, then times that by 7.5 seconds, the seconds should cancel out to veri...

**Liberal arts math**

what is the expected value for buying a ticket?

**Liberal arts math**

1) A lottery draws six numbers from 42 possibilities, without regard to order. What is the total number of possible results of the drawing. In the lottery from the before, what is the probability that you pick the winnin number? In the Lottery from number 1, you pay the state ...

**Spanish**

How do I say the weather in Buenos Aires is mostly sunny. I know sunny is hace calor but how to I actually say "The weather in Buenos Aires is hace calor? How do I say "the weather in Franklin is sunny and cool(hace sol y fresco)"-but I need the whole sentence. ...

**Math**

Thank you so much! I got to the third step and then couldn't figure out how to go about it without using decimals..but thanks so much!

**Math**

(3^x)(4^2x+1)=(6^x+2). Find the exact value of x giving the answer in the form x=ln(a)/ln(b).

**history**

i just need someone to directly answer my question. seriously. this is due soon

**history**

was the reign of terror necessary? what can we learn from it? pleasse help!!

**world history honors**

can someone just give me an answer please?? i kinda need to finish this before school tommorrow!!

**world history honors**

was the reign of terror neccesary for the French Revolution? What can we learn from the French Revolution? help please ;)

**college algebra**

how much is $0.35per miles per week

**physics**

A truck is traveling at 12 m/s down a hill when the brakes on all four wheels lock. The hill makes an angle θ = 15° with respect to the horizontal. The coefficient of kinetic friction between the tires and the road is 0.7. How far does the truck skid before coming to ...

**physics**

but you don't know hf or ho, how do you you use the conservation of energy equation?

**science**

the pneumoconiosis that is caused by inhalation of iron oxide is called A.anthracis B.toluene C.xylene D.acetone

**chemistry**

wich of the following has the highest vapor pressure A.benzene Btoluene C.xylene D.acetone

**Math- Simplifying Identities **

1.) cot(-θ)(secθ) I think the answer is secθ but I don't know how to get this. 2.) (tanθ) / (cos)(90° -θ) 3.) 3sin2xcos2x - sin4x 4.) (cosx + tanx) / (csc^2 x)

**math**

a locomotive is traveling at 120 mph. the engineers reaction time is 0.9 seconds how many feet will the train travel before the engineer recognises an emergency and applies the brake. A.265.ft B.260.ft C.160.ft D.165.ft.

**math**

a overhead gantry crane that is equiped whith a crane and hook block and reeved with 6 parts of line is lifting 12 tons what is the load on the haul line A.2000lbs B.6000lbs C.8000lbs D.4000lbs please show the formula

**math figuire**

an electric motor operates at 110 volts and a resistance of 22ohms the ampage is.. A. 4.5 amps B. 4 amps C. 5000 mi D. 4500 mi

**stats**

Some IQ tests are standardized to a Normal model with a mean of 100 and a standard deviation of 16. About what percent of people should have IQ scores above 116?

**statistics**

In a standard Normal model, what value of z cut off the region described as the lowest 1.5%?

**math**

A seismograph 300 km from the epicenter of an earthquake recorded a maximum amplitude of 5.5 102 µm. Find this earthquake's magnitude on the Richter scale. (Round your answer to the nearest tenth.)

**Algebra**

Thank you

**Algebra**

How do I solve a quadratic equation x^2 - x = 30 by completing the square- I don't understand-could someone just explain the steps to solving this

**physics**

A ball is thrown horizontally from the roof of a building 33.0 m tall and lands 20.5 m from the base. What was the ball's initial speed?

**Physics**

A projectile is launched from ground level to the top of a cliff which is 195 m away and 155 m high. If the projectile lands on top of the cliff 9.2 s after it is fired, find the initial velocity of the projectile (magnitude and direction). Neglect air resistance.

**12th grade Math - word problems**

#1.) The population of bacteria after t hours is given by P(t) = 500/(1+83.33e^-0.162t) a.) What is the initial population? b.) When will the amount of bacteria in the population be 12? #2.) Which investment yields the greater amount after 4 years? a.) $900 at 9% interest comp...

**algebra 1**

in the equation below, y is a function of x. y = 4x + 8 if the value of x isdecreased by 3, how will the value of y change?

**Math - True or False**

True or False: 1. f(x) = -x^3 + x + 1 is an odd function 2. f(x) = x^3 -ax^2 + bx represents a cubic equation having no constant term ...(I'm thinking true?) 3. If f(x) = x/x+2 then f^-1 (x) = 2x/1-x ...(my guess is false?) 4. The equation x^3 - 12x + 16 = 0 has a double r...

**Physics**

A baseball player is approaching home plate with a speed of 5.8m/s when he decides to slide. He slides for 1.1s, just reaching the plate safe. What is the magnitude and direction of the player's acceleration? How far did he slide? His magnitude of acceleration is 5.8/1.1= ...

**Math**

Two taps named tap A and B are used to fill a tank. Tap A on its own takes 5 hours longer than tap B to fill the tank. The two taps working together fill the tank in 6 hours. How long does it take tap A to fill the tank on its own? How long does it take tap B to fill the tank ...

**Math **

Oh and the qn is How long will it take tap A to fill the tank how long will it take tap B to fill the tank help

**Math **

Two taps, having different rates of flow are used to fill a large water tank. If tap A is used on its own it will take 5 hours longer to fill the tank that it would take tap B to fill it on its own. Together, the taps would fill the tap in 6 hours. Assuming that the taps are r...

**2nd grade**

Why does the sun always shine in space?

**math**

One year, China consumed 4 times as much energy as Brazil.Define a variable and write an expression for the amount of energy China used that year.

**Taxes**

When doing your child's Kiddie tax can you receive the return?

**math**

I am supposed solve these SYMBOLICALLY but i don't know how since i was never taught in school. Could someone help me solve these? 1. 7(e^(2x))^3 = 35 2. 7^(x^2-x)=7^6 3. log3(5x)=4 Thank YOU very much!!

**math**

Use the point-slope formula. y-y1=m(x-x1) Pick one of the two points you have. y1 = the y point, x1 = the x point, and m = the slope. Plug those numbers in and then rearrange until you get the form x+y=c. Your answer (if you use the point (-5,-5)) will be (2/3)x-y=(5/3). If yo...

**English**

Number two is correct.

**MATH**

A SOCCER TEAM PLAYED 160 GAMES AND WON 65 PERCENT OF THEM. HOW MANY GAMES DID THEY WIN?

**Literature**

What literature do you consider to be part of the United States' current literary canon, and why? o How do those selections reflect the cultural tradition of the United States? o What do you consider to be part of your personal literary canon?

**Principles of Accoun ting**

Thank you! This will come in handy!

**Principles of Accoun ting**

I have to figure out what basic type of account debited and credited, the specific account, whether the account is increased or decreased, and the normal balance of the specific account. This is the transaction. Purchased used car for $4,000 cash for use in business. For the d...

**CJA/363**

AFIS Facial recognition

**CJA/363**

The thing is I cant find much information to put this paper together the correct way

**CJA/363**

I have never used this before and curious on what kind of help I could actually get

**CJA/363**

I am lost and have no clue what to even write about

**CJA/363**

Technology and Communication Paper · Prepare a 1,050- to 1,750-word paper that explains how technology has affected the communication capabilities of specialized databases in the criminal justice system. · Include the following in your paper: o A comparison of at...

**poetry**

WHERE DO THE SLASHES GO IN THE SYLLABLES OF ROBERT FROST'S POEM/THE ROAD NOT TAKEN

**accounting**

Cooper Construction Company had a contract starting April 2010, to construct a $9,000,000 building that is expected to be completed in September 2012, at an estimated cost of $8,250,000. At the end of 2010, the costs to date were $3,795,000 and the estimated total costs to com...

**accounting**

On January 2, 2010, Wine Corporation wishes to issue $2,000,000 (par value) of its 8%, 10-year bonds. The bonds pay interest annually on January 1. The current yield rate on such bonds is 10%. Using the interest factors below, compute the amount that Wine will realize from the...

**Chemistry *DrBob222**

Posted by Jamie on Sunday, June 20, 2010 at 3:36pm. You are given three test tubes that contain colourless liquid. One test tube contains benzene, another contains ethanol, and the third contains 2,4-hexadiene. Design a procedure that will tell you the contents of each test tu...

**Chemistry**

hmmmm.. well what methods should i be using? should i add water to each of them, and i will know that the only homogenous mixture is ethanol. Then I could add Br2 to the remaining ones, and the 2,4-hexadiene will be uniform, leaving me with the benzene? am i on the right track?

**Chemistry**

You are given three test tubes that contain colourless liquid. One test tube contains benzene, another contains ethanol, and the third contains 2,4-hexadiene. Design a procedure that will tell you the contents of each test tube. Describe your expected observations. So benzene ...

**chemistry**

I need to find how many grams phosphorus (P) are in 0.8645 g sample of MgNH4PO4 x 6H2O How many grams P2O5 can be calculated with this many grams of P What is the percent P (as P2O5) in this

**CUltural Diversity**

Native Americans who are employed are less likely to be managers, professionals, technicians, salespeople or administrators. is this true or false?

**organic chemistry**

what is the major and minor product of 3-methyl 1-pentene + propanol reacted with sulfuric acid?! Detailed mechanism reaction please?? Thank you!

**Chemistry**

2HI(g)--> H2(g) + I2(g) The rate law for the decomposition of HI is r=k[HI]^2. The rate of the rxn was found experimentally to b 2.5 x 10^4 mol/L x s where the HI concentration was 0.0558 M. Are these values ready to plug in to the equation, or because there is 2HI, do I ha...

**Chemistry**

Just a few questions about rates of reaction. A) Why are the units for average and instantaneous rates the same? -because they are both measures of how quickly a reaction is occuring per unit time B) For a given set of data, two students determined different average reaction r...

**CHEMISTRY**

This is STOICHIOMETRY. Please i need help in the worst way. I don't understand this at all and it is due tomorrow, please i need someones help who really understands this. #1.aluminum nitrite and ammonium chloride react to form aluminum chloride, nitrogen gas, and water. W...

**algebra**

a/3+a/3-1=a solve for a

**Math**

How do you work this problem? What does the 2x stand for?

**college**

I am taking an english class with the same question right now. I am a bit confues too but I think the question for example means to write: Education plays a big role in financial success. Then put what type of verb tense is being used and use the same sentence but with differe...

**statistics**

Assume the body temperture of healthy adults are normally distributed with a mean of 98.20 degrees F and a standard deviation of 0.62 degrees F... a. If you have a body temperture of 99.00 degrees F, what is your percentile score? b. Convert 99.00 degrees F to a standard score...

**Computers/Excel**

You wish to calculate the commission on sales. The commission is 6% on all sales that are at least 20% above cost.

**math**

d^2-144=0

**Math**

is 7.02 correct for A and I am still stuck on B

**Math**

A random survey of 500 households determines that 20% of the households would do so and that each participating household expects to recycle about 100 cans monthly with a standard deviation of 30 cans. Question (a) What is the 95% confidence interval regarding the percentage ...

**Algebra**

Simplify 2sqrt25x^3 -3x sqrt4x

**12th grade**

solve: sec(1/4)X+"Square Root of 2"=0

**algebra**

83% of 335 =

**Marketing**

What marketing segmentation criteria could be used to find a person like your self from a purchased list of names? Assume an ad agency is preparing a marketing campaign for an auto company that is bring out a new car. What kind of marketing mix and branding message would be ne...

**Business Law**

Limited Liability Companies. John, Lesa, and Trevor form a limited liability company. John contributes 60% of the capital, and Lesa and Trevor each contribute 20%. Nothing is decided about how profits will be divided. John assumes that he will be entitled to 60% of the profits...

**Math 157**

How many rectangles will fit about a point when tessellating the plane? How do you know?

**physics**

An electron, moving with a speed, 6.8 km/s, enters a magnetic field that has a strength of 6.9 T. The magnetic force on the electron is perpendicular to the electron's velocity. Determine the radius of the resultant path of the electron.

**calculus**

Thanks, but where did you get the 2a = 10 from?

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