Saturday

April 25, 2015

April 25, 2015

Total # Posts: 190

**Physics**

An object is 21 cm in front of a diverging lens that has a focal length of -13 cm. How far in front of the lens should the object be placed so that the size of its image is reduced by a factor of 1.5? my work: 1/di=(1/-13)-(1/21) di=-8.02 m=8.02/21 m=.381 m2=-.381/1.5 m2=-.254...
*April 8, 2015*

**personal finance**

140.50
*January 29, 2015*

**Algebra**

Find the sum of all values of a such that the point (a,7) is 3 sqrt 5 from the point (2,1).
*December 31, 2014*

**algebra**

y>-5/3x+3 Please help me i need some guidance
*December 12, 2014*

**algebra**

Janel walks for x minutes and runs for y minutes for a total of 30 minutes of exercise. Ramal walks for 3 times as long as Janel but runs for half of the time she does for a total of 40 minutes of exercise. Is the system below correct for this situation? If not, why not? x + ...
*December 12, 2014*

**English**

I need help with my research paper outline.(ARE THERE ANY MISTAKES?) According to (author/source)Michael Martinez and Jaqueline Hurtado(Date 2014/11/15) the main idea about this subject is the parents does not believe in what the government said and that they are not doing ...
*December 10, 2014*

**English**

My daughter has a worksheet due tomorrow and is stressing because she read the book Dragonwings and didn't get it at all and doesn't get the worksheet and i cant read it and help her,please help 1)Why doesn't Moon Shadow attend public school?How is he being ...
*December 9, 2014*

**English**

The story is about a boy who never has met his father because his father is with a group called the demons and they work to fing gold at the golden mountain in china, and if the demons catch you trying to steal gold they will beat you. One day Uncle bright star comes and ...
*December 9, 2014*

**help please **

Abby delivers twice as many newspapers as Jillian, and Brandy delivers 50 more papers than Abbey. How many papers does each deliver if the total number of papers delivered is 550?
*November 13, 2014*

**economics,life science,math literacy and consumer studies**

what career can i persure with these subjects?
*November 13, 2014*

**Physics**

The lob in tennis is an effective tactic when your opponent is near the net. It consists of lofting the ball over his head, forcing him to move quickly away from the net (see the drawing). Suppose that you lob the ball with an initial speed of 16.5 m/s, at an angle of 52.5°...
*October 22, 2014*

**Physics**

An airplane is flying with a velocity of 220 m/s at an angle of 30.0° with the horizontal, as the drawing shows. When the altitude of the plane is 2.8 km, a flare is released from the plane. The flare hits the target on the ground. What is the angle θ? I found Vox=190...
*October 21, 2014*

**8th grade math**

5^3
*September 15, 2014*

**Practical English**

In which sentence are the italicized words a dangling modifier? A)Flying beneath the cloud, the pilot could see the airport. B)Resting on the sea bottom, the old trunk held coins. C)Arriving ten minutes late, the store was closed for the night. Not knowing the danger, the ...
*July 21, 2014*

**math**

abby has a ribbon that was 1 meter long..she cut off 25 centimeters..how long is the ribbon now??
*June 27, 2014*

**physics **

a man walks 8km North and then 5km in a. direction 60degrees. find its distance from his starting point
*May 22, 2014*

**math**

Jessica says she can add 1/3"2/6"3/9"4/12"and 5/15 together using mental math.Explain how she can do this.
*April 9, 2014*

**math**

An isoscelless triangle of sides of 13cm, 13cm, 10cm is inscribed in a circle is inscribed in a circle. What is the radius of the circle?
*March 17, 2014*

**math**

An isosceles triangle of sides 13cm, 13cm, 10cm is inscribed in a circle. What is the radius of the circle?
*March 17, 2014*

**Math**

A line in coordinate plane contains the points P(2, -7) and Q(-4, -1). What point is the midpoint of PQ?
*February 27, 2014*

**physics**

A body of mass 10kg in air and 4kg in water calculate the volume and its density
*January 21, 2014*

**physics**

An object of volume 4 metercube is immersed in a liquid of density 1030 kilogramme per meter cubic meter calculate the upthrust of liquid of the object
*January 21, 2014*

**physics**

An object of volume 4 metercube is immersed in a liquid of density 1030 kilogramme per meter cubic meter calculate the upthrust of liquid of the object
*January 20, 2014*

**physics**

An object of volume 4 metercube is immersed in a liquid of density 1030 kilogramme per meter cubic meter calculate the upthrust of liquid of the object
*January 20, 2014*

**physics**

An object of volume 4 metercube is immersed in a liquid of density 1030 kilogramme per meter cubic meter calculate the upthrust of liquid of the object
*January 20, 2014*

**physics**

An object of volume 4 metercube is immersed in a liquid of density 1030 kilogramme per meter cubic meter calculate the upthrust of liquid of the object
*January 20, 2014*

**physics**

A ball is thrown horizontally from the top of a building 150 meters high. The ball strikes the ground 56 meters horizontally from the point of release. What is the speed of the ball just before it strikes the ground?
*December 9, 2013*

**physics**

A ball is thrown horizontally from the top of a building 150 meters high. The ball strikes the ground 56 meters horizontally from the point of release. What is the speed of the ball just before it strikes the ground?
*December 9, 2013*

**physics**

A ball is thrown horizontally from the top of a building 150 meters high. The ball strikes the ground 56 meters horizontally from the point of release. What is the speed of the ball just before it strikes the ground?
*December 9, 2013*

**math**

find the sale price. round to the nearest cent. 7. regular price: $57.63 percent of discount: 10% $63.39 $5.76 $51.87 $57.53
*December 2, 2013*

**math**

How do i convert 7 2/5 into a decimal
*November 7, 2013*

**science**

sorry i do not know why it posted that so many times :/ lol :)
*October 30, 2013*

**science**

The answer is most definitely D. Take it from an A+ science student.
*October 30, 2013*

**Science**

A ball is thrown horizontally from the top of a cliff 20m high. If the initial horizontal velocity is 8.0m/s,find how long it takes to reach the horizontal plane at the foot of the cliff.
*September 22, 2013*

**Math, Algebra**

Need to check answers. Q1. Find the length of the following segment created by these pairs of endpoints: (0, 1), (0, 7) Answer : 0 Q2. Find the length of the following segment created by these pairs of endpoints: (9, 6), (12, 6) Answer : 3 Q3. Find the length of the following ...
*September 18, 2013*

**Civics**

i have
*May 19, 2013*

**Civics**

List the basic problem of scarcity and how it drives economic decison-making. Describe the role of factors of production. What is supply and demand? Apply the principles of supply and demand that predicts market prices and incentives for buyers and sellers.
*May 19, 2013*

**Math**

Mike scored 85, 88, 87, 93, 95, 92, and 83 on his math tests. What is the least he can score on the next test if he wants to maintain a 90 average? PLZ HELP ME!!!!!!!! I'm so confused
*May 11, 2013*

**english**

1. people find life being with others 2. personification 3. trouble is coming 4. if you call them, the dogs will come back
*May 1, 2013*

**Statistics**

the scoring of IQ tests is designed so that the scores of the test taking population are normally distributed with a mean of 100 and a standard dev of 15. what percent of the population have an IQ less than 92? how do i figure this out?
*April 29, 2013*

**fractions**

what is 4 2/8 plus 5 6/7.
*April 21, 2013*

**Ms.Sue or Steve can u please help me?!?!!?**

so gabby was the answer to number 9 what you said or what reiny said?
*December 21, 2012*

**Geography**

What are the differences betwen formal, functional, and perceptional regions?
*September 24, 2012*

**Math**

How many seven-digit numbers are there when 0 and 1 cannot be the leading number?
*September 13, 2012*

**English**

All of them answers are wrong , i just used those answers and they were wrong. i got a 20 thanks to these wrong answers
*May 8, 2012*

**Government**

I wasn't guessing, and i don't have the materials for this problem, i have like printed out lessons and this is one my teacher didn't print out...
*March 13, 2012*

**Government**

After the passage of the 19th Amendment, white women _____. 1.)faced the same practical obstacles to voting as blacks did My answer2.)received the right to vote in Wyoming for the first time 3.)were accorded the protections of the Bill of Rights 4.)faced few of the practical ...
*March 13, 2012*

**Government**

Is it 3?
*March 13, 2012*

**Government**

Which of the following statements is incorrect? 1.)Early representative parliaments were elected by the people. 2.)Representation is a crucial element of democracy in large polities. 3.)The development of representative parliaments helped establish the principle of consent of ...
*March 13, 2012*

**7th grade math**

If a rule is (3x,y) and a sce factor of 4 is used to transform it , what will tge new rule be ?
*January 16, 2012*

**chemistry**

What mass of ZnCl2 is needed to make 4 L of 1.8 M solution?
*December 8, 2011*

**math**

372,450
*December 8, 2011*

**Math**

Help, I can't find the pattern rule for this sequence(eg. -6,-3,2,9,18 and the pattern rule is n squared-7) The pattern: 6,28,64,114,178. What's the pattern rule? The pattern: 96,84,64,36. What's the pattern rule? The pattern: 0,24,216,960. What's the pattern ...
*November 2, 2011*

**geometry**

a phone company charges a flat monthly fee of $15 for cell phone services, plus an additional fee for every minute you talk. in a given month, you are charged $36 for the 24 minutes you talked( not including the $15 flat fee.) let the total cost be c(in $) and the time you ...
*October 28, 2011*

**Phys sci**

we are makeing rube goldberg machiens but are problem is hot to activate the pulley by putting the string in to the fire befor its time and makeing the machine do other things.
*October 20, 2011*

**Science**

A jar contains one half of a kilogram of water. How many grams of water does it have?
*June 13, 2011*

**Trigonometry**

Solve: 2cos^2 theta - 3cos theta+ 1= 0 interval [0, 2ð)
*May 30, 2011*

**Trigonometry**

(1+ tan^2x)/(secx)
*May 30, 2011*

**Trigonometry**

sin x= -1
*May 30, 2011*

**Calculus**

Assume you wish to make a box whose base is a rectangle with one side twice as long as the other side and whose volume is 100 m^3. What would the minimum surface area be, if there is a minimum surface area? b) Under the same sceenerio as in (a), what would the maximum surface ...
*May 13, 2011*

**Calculus**

Find the derivative of f(x) =cos^-1(x^2) Ok so I'm having a little confusion with the chain rule and I'm not sure if my answer is right... will the answer be... 2x(-cos^-2(x^2)(-sin(x^2)?
*May 13, 2011*

**Physics (please help!!)**

The Crab pulsar (m=2.00x10^30 kg) is a neutron star located in the Crab Nebula. The rotation rate of the Crab pulsar is currently about 30.0 rotations per second, or 60.0pi rad/s. The rotation rate of the pulsar, however, is decreasing; each year, the rotation period increases...
*April 15, 2011*

**Calculus**

Find the derivative of f(x)=e^(sin(1))+(sin(1))^x.
*March 6, 2011*

**Calculus**

Find the derivative of f(x)=e^(sin(1))+(sin(1))^x
*March 6, 2011*

**Physics (please help!!!!)**

A cart running on frictionless air tracks is propelled by a stream of water expelled by a gas-powered pressure washer stationed on the cart. There is a 1.00-m^3 water tank on the cart to provide the water for the pressure washer. The mass of the cart, including the operator ...
*March 4, 2011*

**Physics (please help!!!!)**

A cart running on frictionless air tracks is propelled by a stream of water expelled by a gas-powered pressure washer stationed on the cart. There is a 1.00-m^3 water tank on the cart to provide the water for the pressure washer. The mass of the cart, including the operator ...
*March 3, 2011*

**Never mind I figured it out...**

Thanks anyways...
*March 3, 2011*

**Physics (please help!!!!)**

An astronaut is performing a space walk outside the International Space Station. The total mass of astronaut with her space suit and all lher gear is 127 kg. A small leak develps in her pulsion system and 5.84 g of gas are ejected each second into space with a speed of 754 m/s...
*March 3, 2011*

**Physics (please help)**

An astronaut is performing a space walk outside the International Space Station. The total mass of astronaut with her space suit and all lher gear is 127 kg. A small leak develps in her pulsion system and 5.84 g of gas are ejected each second into space with a speed of 754 m/s...
*March 3, 2011*

**math**

Make r the subject of the formula.V=1/3 pie r square h.2)express V in terms of N,T,K and Y:H=tvk square all over Y
*March 3, 2011*

**Calculus**

Let f(x)= (1/x). Use the limit definition of derivative to find f'(x). My professor's answer is: -1/x but I keep getting: -1/x^2 what do I have to do to get that answer?
*February 27, 2011*

**Calculus**

Let f(x)= (1/x). Use the limit definition of derivative to find f'(x). My professor's answer is: -1/x but I keep getting: -1/x^2 what do I have to do to get that answer?
*February 27, 2011*

**Chemistry**

Please help me with this one... What is the oxidizing agent in the following redox reaction: HNO3(aq) + K2CrO4(aq) + Fe(NO3)2(aq) -> KNO3(aq) + Fe(NO3)3(aq) + Cr(NO3)3(aq) + H2O(l) ?
*February 25, 2011*

**Chemistry**

I just got the answer... it's 0.25 M right?
*February 24, 2011*

**Chemistry**

Can someone please explain me how to do this problem? A 25mL solution of 0.5 M NaOH is titrated until neutralization into a 50mL sample of HCl. What was the concentration of the HCl?
*February 24, 2011*

**Calculus**

Thank you very much!
*February 23, 2011*

**Calculus**

Decide if the following function f(x) is differentiable at x=0. Try zooming in on a graphing calculator, or calculating the derivative f'(0) from the definition. f(x) = x^4sin(2/x), if x is not equal to 0, and f(x) = 0 if x = 0. If it is differentiable, what is the ...
*February 23, 2011*

**math**

if you divide 35 and 10 what would be the answer? would it be even or odd
*February 22, 2011*

**Chemistry**

How many milliliters of 0.645 M K2CrO4 are needed to precipitate all the silver in 405 mL of 0.190 M AgNO3 as Ag2CrO4?
*February 19, 2011*

**Physics**

$230
*February 15, 2011*

**physics**

Please help I really dn't know the answer
*February 14, 2011*

**Calculus**

Let f(x) = mx-12 if x is less than -5 = x^2 +5x -7 if x is greater than or equal to -5. If f(x) is a function which is continuous everywhere, then we must have m=_______
*February 7, 2011*

**Calculus**

A function f(x) is said to have a removable discontinuity at x=a if: 1. f is either not defined or not continuous at x=a. 2. f(a) could either be defined or redefined so that the new function IS continuous at x=a...
*February 7, 2011*

**Calculus**

A 0.2 ml dose of a drug is injected into a patient steadily for 0.75 seconds. At the end of this time, the quantity, Q, of the drug in the body starts to decay exponentially at a continuous rate of 0.2 percent per second. Using formulas, express Q as a continuous function of ...
*February 6, 2011*

**Calculus**

A 0.2 ml dose of a drug is injected into a patient steadily for 0.75 seconds. At the end of this time, the quantity, Q, of the drug in the body starts to decay exponentially at a continuous rate of 0.2 percent per second. Using formulas, express Q as a continuous function of ...
*February 6, 2011*

**Calculus**

Sorry... Again... Before I posted the question, I could see the symbols... Consider the function f(x) = 8.5 x − cos(x) + 2 on the interval 0 less than or equal to x less than or equal to 1. The Intermediate Value Theorem guarantees that there is a value c such that f(c...
*February 6, 2011*

**Calculus**

Sorry... Consider the function f(x) = 8.5 x − cos(x) + 2 on the interval 0 ¡Ü x ¡Ü 1. The Intermediate Value Theorem guarantees that there is a value c such that f(c) = k for which values of c and k? Fill in the following mathematical statements, ...
*February 6, 2011*

**Calculus**

Sorry, I had problems posting all these questions... Let f(x) = mx-12 if x is less than -5 fr(x)= x^2 +5x -7 if x is greater than or equal to -5. If f(x) is a function which is continuous everywhere, then we must have m=_______
*February 6, 2011*

**Calculus**

Let If f(x) is a function which is continuous everywhere, then we must have m=________________
*February 6, 2011*

**Calculus**

OK I made a mistake... AGAIN fx is not equal to that sorry. I will repost this question.
*February 6, 2011*

**Calculus**

I'm sorry, I was having some problems posting the questions.... Again Let f(x)= mx-12 if x is less than -5 x^2 +5x - 7 if x is greater than -5 Show that f(x) has a removable discontinuity at x=−7 and determine what value for f(−7) would make f(x) continuous at ...
*February 6, 2011*

**Calculus**

A function f(x) is said to have a removable discontinuity at x=a if: 1. f is either not defined or not continuous at x=a. 2. f(a) could either be defined or redefined so that the new function IS continuous at x=a...
*February 6, 2011*

**Calculus**

A 0.2 ml dose of a drug is injected into a patient steadily for 0.75 seconds. At the end of this time, the quantity, Q, of the drug in the body starts to decay exponentially at a continuous rate of 0.2 percent per second. Using formulas, express Q as a continuous function of ...
*February 6, 2011*

**Calculus**

An electrical circuit switches instantaneously from a 2 volt battery to a 20 volt battery 3 seconds after being turned on. Sketch on a sheet of paper a graph the battery voltage against time. Then fill in the formulas below for the function represented by your graph. For t &...
*February 5, 2011*

**Calculus**

Sorry... Consider the function f(x) = 8.5 x − cos(x) + 2 on the interval 0 ¡Ü x ¡Ü 1. The Intermediate Value Theorem guarantees that there is a value c such that f(c) = k for which values of c and k? Fill in the following mathematical statements, ...
*February 5, 2011*

**Calculus**

Consider the function f(x)=8.5x−cos(x)+2 on the interval 0¡Üx¡Ü1 . The Intermediate Value Theorem guarantees that there is a value c such that f(c)=k for which values of c and k? Fill in the following mathematical statements, giving an interval with...
*February 5, 2011*

**Chemistry**

What is the equation for heat of CuCO3 and heat of Pb(NO3)2.
*February 3, 2011*

**arithmetic**

What is the area of the irregular shape of a cone if the radius is 7in and the height is 22in?
*January 24, 2011*

**Algebra**

@helper: Yes, thats it! I wasnt sure how to type it. I solved it while I was waiting, and thats the answer I got ,thanks so much!
*January 6, 2011*