Monday

July 6, 2015

July 6, 2015

Total # Posts: 957

**maths --plse help me..**

prove that 1/2 * 1/3 * 1/4 * ... ..... ... ..... ..... .... ....... .... ... ....1/99 < 1/2
*December 10, 2012*

**maths --plse help me..**

find the sum to infinity of the following series rn (1+1/n) -(1 - 1/1+n) - n square / (n+1)square + ...........
*December 7, 2012*

**maths --plse help me..**

find the sum to infinity of the following series rn (1+1/n) -(1 - 1/1+n) - n square / (n+1)square + ...........
*December 7, 2012*

**Math**

In five years,Emma will be three years more than twice as old as her son. Five years ago,she was two years less than five times, as old as her son. How old Emma now?
*December 3, 2012*

**Physics**

A bicyclist of mass 65 kg stands on pedal. The crank is .170 m long and makes a 45 angle with the vertical. The crank is attached to the chain wheel which is 9.70 cm. What force must the chain exert to keep the wheel from turning?
*November 12, 2012*

**Math**

414/7 = x/16 7x = 414(16) 7x = 6624 x = 6624/7 x = 926.29 but I wonder did you mean 4.14 in which case the answer would be 9.29
*November 12, 2012*

**Alegbra **

I need help, my teacher says that I'm half way right with this but not fully what am I missing I'm confused. The criteria for the quadratic equation as i written is: y>0 is real roots y=0 is real and equal roots y<0 is imaginary or complex roots My teacher said I...
*November 8, 2012*

**math**

an angle is 62.3 degree. find its supplement?
*November 5, 2012*

**math**

Lily, Jane & Betty gave away 224 balloons at a carnival. Lily gave away 4 times as many balloons a Betty while Jane gave away half as many balloons as Lily. How many balloons did Jane give away?
*October 31, 2012*

**college math please help**

What do these mean? They are supposed to represent things but I don't understand them. C=2╥r for r, S=P+Prt for t, and A=2lw+2lh+2wh for h
*October 22, 2012*

**college math word problem**

A new car worth 45K is depreciating in value by 5K per year. How can I write a formula that models the cars' value,y, in dollars, after x years?Then using the formula determine after how many years the cars' value will be 9K.
*October 22, 2012*

**collegemathwordproblem**

One number exceeds another by 24. The sum of the numbers are 58. What are the numbers?
*October 22, 2012*

**collegemathwordproblem**

When 80% of a number is added to the number, the result is 252. How do I find the number?
*October 22, 2012*

**collegemathwordproblem**

When a number is decreased by 30%of itself, the result is 28. What is the number?
*October 22, 2012*

**social studies**

A prime minister is the leader of what type of region? A) climate B) cultural C) economic D) political
*October 17, 2012*

**Physics**

yo = 10 m vo= 10 m/s angle = 45 degrees has to be changed to radians, x = 16.4 m Theres wasn't a lot of information given. Solve for t and y.
*October 14, 2012*

**Physics**

I'm having problems setting up an equation to solve for time t in a projectile motion problem. What is given is horizontal position, accerlation due to gravity, the initial speed with, the angle, and the vertical position related to speed. I'm suppose to find y ...
*October 14, 2012*

**division**

414divide by 9
*October 3, 2012*

**3rd Grade Math**

Its too hard
*October 2, 2012*

**Science **

My professor tells me I'm not using the right formula for this problem. can someone please help me. The formula is not delt p = density x gravity x height The mercury manometer on the right and the pressure transducer on the left are both connected to a piston-driven ...
*September 25, 2012*

**Physics**

My professor tells me I'm not using the right formula for this problem. can someone please help me. The formula is not delt p = density x gravity x height The mercury manometer on the right and the pressure transducer on the left are both connected to a piston-driven ...
*September 24, 2012*

**ap us history**

how can i put all these events and make it to a essay -engishman rights -taxes -independence -boston tea party -tea act -whiterights
*September 19, 2012*

**Math & Chemistry **

I having problems converting my answer to just cm. Given: Average Velocity = 1 m/s Water per day = 6,000 m^3/day Want to find the diameter of fluid flow. I am using the eqation: D = sqrt(4*q)/(pi*v) q= volumetric flow rate (6,000 m^3/day) v= velocity (1 m/s) when I solve I get...
*September 13, 2012*

**Math**

2.48> 2.4 1> 2.463
*September 10, 2012*

**Math**

Odd number between 411 and 423 with sum of 12
*September 7, 2012*

**math, medical**

A medication is available in 30mg. tablets. A patient is given a prescription for gr. ii. How many tablets should the patient take? I am not sure how to work this problem out, and i am confused on the gr. ii. part, i do not know what it means, please help. thank you
*September 4, 2012*

**math**

A medication is available in 30mg. tablets. A patient is given a prescription for gr. ii. How many tablets should the patient take? I am not sure how to work this problem out, and i am confused on the gr. ii. part, i do not know what it means, please help. thank you
*September 4, 2012*

**Chemistry/Math**

I'm not sure how to approach this problem. The teacher wants volumetric flow rate (in cm). A commonly used rule of thumb is that average velocity in a pipe should be about 1 m/s or less for "thin"(viscosity about water). If a pipe needs to deliver 6,000 m^3 of ...
*August 31, 2012*

**English 11**

number 4 is A) was never married number 5 is D) we the people of the united states number 6 is B) the writers are in complete agreement
*August 29, 2012*

**College Physics 2**

5.17 x 10^11
*August 29, 2012*

**Science**

I not sure what formula to use for KE or how to find the mass for the equation. Water is flowing through a 2-inch diameter pipe with a velocity of 3 ft/s. Part A What is the kinetic energy of the water in (ft)(lbf)/(lbm)? (lbf) pound force (lbm) pound mass Part B What is the ...
*August 25, 2012*

**math**

if the speed of a comet at perihelion (the closest orbital point to the sun) is 98000 mi/h. How far will the comet travel in 30 sec?
*August 9, 2012*

**maths**

a ladder 15 meters long just reaches the top of a vertical wall. if the ladder makes an angle of 60 degrees with the wall. find the height of wall.....
*August 7, 2012*

**math ( pre algebra )**

It makes a capital h
*July 6, 2012*

**pre cal**

Verify each identity sin^x+siny/sinx-siny=tan(x+y/2) (times) cot(x-y/2)
*June 30, 2012*

**Finance**

a client comes to you for an investment advice on his 500,000 winnings from the lottery. he has been offered the following options. what would be the best option 6% compounded interest quarterly for 5 years or 8% compounded annually for 5 years or 14.5% simple interest for 10 ...
*June 29, 2012*

**Math**

Tom needs a pipe that is 21/24 of an inch in diameter. The store has 7/8 inch pipe. Should he buy it?
*June 27, 2012*

**Math**

Mr. Munoz has a 1/16 inch drill bit and a 3/32 inch drill bit. Which will make a bigger hole?
*June 27, 2012*

**english**

Choose the sentence in which the verb has a direct object. A. George was furious. B. I walked away. C. They won the game. D. She is insecure.
*June 26, 2012*

**english**

Which sentence below contains a correctly used modifier in italics? A. Joe looked sad at his broken bike. B. The sauce tasted bitterly, and I couldn't swallow it. C. He spoke sharply to his sister. D. I feel badly because I lost the race.
*June 26, 2012*

**English**

Which of the following sentences uses a preposition properly? A. Connor waited in line while Ava parked the car. B. Where is David at? C. There was a big argument between Megan, Abira, and Lena. D. I might of lent him the book, if he had asked
*June 26, 2012*

**help please :)**

those are the only choices
*June 20, 2012*

**help please :)**

The U.S. Congress added disability insurance to the Social Security Act in 19____. A. 35 B. 54 C. 65 D. 72 i got A.
*June 20, 2012*

**algebra**

go to hell
*June 20, 2012*

**math**

Which one of the following statements best describes what a budget is? A. A method of figuring out the inflation rate. B. An organized plan for spending money. C. A way to keep people from really enjoying life. D. A plan for saving money.
*June 14, 2012*

**budgeting**

thanks
*June 14, 2012*

**budgeting**

A. net B. disposable C. budgeted D. taxable
*June 14, 2012*

**budgeting**

Emilio is employed as full-time mechanic in the service department of an auto dealer. In his spare time, he draws political cartoons and sells them to the weekly newspaper in his home town. He is paid $35 for each cartoon, which amounts to an additional $1,820. The newspaper ...
*June 14, 2012*

**physics**

A girl throws a water-filled balloon at an angle of 50.0 degree(s) above the horizontal with a speed of 12.0 m/s. The horizontal component of the balloon's velocity is directed toward a car that is approaching the girl at a constant speed of 8.00 m/s. (See figure) (a) If ...
*May 17, 2012*

**Algebra- MAT 116**

I need Help with this question: Find the value 0.2y(y to the second power)+ o.3y (y to the second power)-0.1y (y to the second power)
*May 14, 2012*

**MAT 116**

thank you!
*May 14, 2012*

**MAT 116**

Please HELP!! traslate six times a number subtract three the number then simplified the expression
*May 14, 2012*

**MAT 116**

Use the distributive property to rewrite the expression (a+8)4= (simplify answer)
*May 14, 2012*

**Global History**

Thanks for trying to help, however a five year old could write a wikipedia article and therefore it is not realiable and banned at my school. It's fine, though, because a friend pointed me elsewhere (an edu) so thanks again.
*May 14, 2012*

**Global History**

Definition and importance in Japanese history: • Ethnocentrism • Zaibatsu I have already looked in my textbook, without success. Please no links. My computer is extremely slow and links screw it up. Thanks!
*May 14, 2012*

**Global History**

What was the effect of Japanese imperialism in the early 1900s?
*May 14, 2012*

**Phizzics....**

A ball is thrown straight up from ground level. After a time 4.1 s, it passes a height of 157.1 m. What was its initial speed? The accelera- tion due to gravity is 9.8 m/s2 . what is its initial speed
*May 10, 2012*

**Parts of speech**

People express thoughts mainly by using
*May 8, 2012*

**Chemistry**

how many grams of solute is in 64.3 mL of 0.0238 molarity KOH?
*May 2, 2012*

**Physics**

A small cork with an excess charge of +6.0 µC is placed 0.25 m from another cork, which carries a charge of −3.2 µC. What is the magnitude of the electric force between the corks? The Coulomb constant is 8.98755 × 10 9 N · m2 /C 2 . Answer in ...
*April 29, 2012*

**Physics**

Where did you get 210?
*April 29, 2012*

**Physics**

It says its wrong.
*April 29, 2012*

**Physics**

A balloon rubbed against denim gains a charge of −2.0 µC. What is the electric force between the balloon and the denim when the two are separated by a distance of 5.0 cm? (Assume that the charges are located at a point.) The value of the Coulomb constant is 8.98755...
*April 29, 2012*

**MATH**

The cumulative number of car accidents from 2000 to 2010 can be modeled by the quadratic expression, C=-42x^2+924x+14,112, where x=1 corresponds to 2001, and so on until x=11 corresponds to 2010. Find the number of cumulative car accidents in 2003. Use the table of values to ...
*April 29, 2012*

**MATH**

If C dollars are deposited in an account paying r percent annual interest, the amount after x years is A+C(1+r)*. Approximate the amount in the account after x years, when C=$100.00, r=19%, and x-15 years.
*April 29, 2012*

**MATH**

The cumulative number of car accidents from 2000 to 2010 can be modeled by the quadratic expression, C=-42x^2+924x+14,112, where x=1 corresponds to 2001, and so on until x=11 corresponds to 2010. Find the number of cumulative car accidents in 2003. Use the table of values to ...
*April 29, 2012*

**MATH**

A rectangle pen for a pet is 5 feet longer than it is wide. Give possible values for the width W of the pen if its area must be between 266 and 750 square feet, inclusively. The width of the pen from the smaller value of the width is how many feet to the larger value of the ...
*April 29, 2012*

**math**

If C dollars are deposited in an account paying r percent annual interest, approximate the amount in the account after X years if c=$250, r=2.4% and x=23 years?
*April 20, 2012*

**math**

The population P in 1995 for a state is given along with r, its annual percentage3 rate of a continuous growth. P=16 millions, r=1.2% Write the formula f(x) =Pe^yx, where r is in a decimal notation, that models the population in millions x years in 1995.
*April 19, 2012*

**math**

In 2000 the population of a state was 5 million and growing continuously at a rate of 3.4% per year. a) Write a function that models the state’s population in millions x years after 200. b) Graph f in 0,10,1 by 4,7,1 c) Estimate the state’s population in 2007.
*April 19, 2012*

**math**

Biologist have have found that the weight W of a bird and the length L of it’s wing span are related by L=kW1/3, where k is a constant. The following list L and W for one species of bird. What is the value of k? W kilograms0.1 0.4 0.8 1.1 L meters 0.399 0.634 0.798 0.888
*April 19, 2012*

**math**

The total hang time T in seconds, is given by T(h)=^h/2. Where h is the maximum height. If a person jumps 6 ft off the ground, determine for how many seconds the person is in the air.
*April 19, 2012*

**math**

find function values f(x)=9x^2+10x-8
*April 19, 2012*

**word problem**

A farmer decides to enclose a rectangular garden, using the side of a barn as one side of the rectangle. What is the maximum area that the farmer can enclose with 80 feet of fence? What should the dimensions of the garden be to give the area?
*April 18, 2012*

**Algebra**

For what values of x is x/[x(3x-4)] undefined?
*April 16, 2012*

**Physics**

Light falls on a double slit with slit separation of 2.19 × 10 −6 m, and the ﬁrst bright fringe is seen at an angle of 12.7 ◦ relative to the central maximum. What is the wavelength of the light? Answer in units of nm Can the person post the steps and ...
*April 10, 2012*

**Physics**

It says incorrect. Can you explain the process?
*April 10, 2012*

**Physics**

Light falls on a double slit with slit separation of 2.19 × 10 −6 m, and the ﬁrst bright fringe is seen at an angle of 12.7 ◦ relative to the central maximum. What is the wavelength of the light? Answer in units of nm
*April 10, 2012*

**Physics**

Im sorry to ask again but what equation did you use? Can you list the steps you did please? So I can answer the next few questions by myself.
*April 10, 2012*

**Physics**

A pair of narrow parallel slits separated by a distance of 0.253 mm are illuminated by the green component from a mercury vapor lamp (λ = 545.1 nm). What is the angle from the central maximum to the ﬁrst bright fringe on either side of the central maximum? Answer ...
*April 10, 2012*

**Physics**

And where did you get those numbers?
*April 10, 2012*

**Physics**

Excuse me what was the equation you used? Because the answer is wrong.
*April 10, 2012*

**Physics**

A double-slit interference experiment is performed with light from a laser. The separation between the slits is 0.58 mm, and the ﬁrst-order maximum of the interference pattern is at an angle of 0.060 ◦ from the center of the pattern. What is the wavelength of the ...
*April 10, 2012*

**calc**

Let f(x)=x^3-3x^2 find the absolute maximum value of f(x) on the interval [1,4]? 22 hours ago - 3 days left to answer
*April 5, 2012*

**calc**

A____________B 9 miles is between A and B? at 3pm Andy began travelling South at a rate of 4mi/hr from point A at the same time Bill began travelling West at a rate of 5mi/hr from point B to A both stop wlking when Bill reaches point A What time will the distance between Bill ...
*April 5, 2012*

**11th grade algebra 2**

(1-7) write each function in vertex form (8-10) write each funtion in standard form? 1) Y=x^2+3x-10 2) Y=x^2-9x 3) Y=X^2+x 4) Y=x^2+5x+4 5) Y=4x^2+8x-3 6) Y=(3/4)x^2+9x 7) Y=-2x^2+2x+1 8) Y=(x-3)^2+1 9) Y=2(x-1)^2-3 10)Y=-3(x+4)^2+1
*April 5, 2012*

**Algebra 2**

(1-7) write each function in vertex form (8-10) write each funtion in standard form? 1) Y=x^2+3x-10 2) Y=x^2-9x 3) Y=X^2+x 4) Y=x^2+5x+4 5) Y=4x^2+8x-3 6) Y=(3/4)x^2+9x 7) Y=-2x^2+2x+1 8) Y=(x-3)^2+1 9) Y=2(x-1)^2-3 10)Y=-3(x+4)^2+1
*April 5, 2012*

**Physics**

Sherlock Holmes examines a clue by holding his magnifying glass (with a focal length of 29.8 cm) 10.4 cm away from an object. Find the image distance. Answer in units of cm Find the magniﬁcation.
*April 1, 2012*

**physics**

disregard
*April 1, 2012*

**physics**

A ray of light of vacuum wavelength 550 nm traveling in air enters a slab of transparent material. The incoming ray makes an angle of 37.4◦ with the normal, and the refracted ray makes an angle of 22.0◦ with the normal. Find the index of refraction of the ...
*April 1, 2012*

**Physics**

An object 3.35 cm tall is placed 10.8 cm in front of a mirror, which creates an upright image that is 5.61 cm in height. a) What is the magniﬁcation of the image?
*April 1, 2012*

**Physics**

disregard
*April 1, 2012*

**Physics**

The image of a crayon appears to be 20.6 cm behind the surface of a convex mirror and is 1.64 cm tall. The mirror’s focal length is 54.3 cm. a) How far in front of the mirror is the crayon positioned? Answer in units of cm I keep on getting it wrong so the answer & ...
*April 1, 2012*

**physics**

I keep getting error
*April 1, 2012*

**physics**

do I put my calculator in degrees?
*April 1, 2012*

**physics**

A ray of light traveling in air strikes the surface of a liquid. If the angle of incidence is 33.5◦ and the angle of refraction is 19.8◦, ﬁnd the critical angle for light traveling from the liquid back into the air. Answer in units of◦
*April 1, 2012*

**Physics**

do I have to convert GHz?
*April 1, 2012*

**Physics**

What is the wavelength of a radar signal that has a frequency of 30 GHz? The speed of light is 3 × 10^8 m/s. Answer in units of m Giving me the formula is just fine
*April 1, 2012*

**Physics**

Consider a concave mirror with a focal length of 14.04 cm. b) Find the image distance when the object distance is 7.02 cm c) Find the magniﬁcation of the image for part b Giving me the formulas is just fine
*April 1, 2012*

**Global History**

Sorry this is not very detailed...I checked my textbook but couldn't find any information. How did the Islamic Conquest impact India? Thanks so much in advance :)
*March 31, 2012*