Friday

February 27, 2015

February 27, 2015

Total # Posts: 348

**Math**

Determine the solution set of 2x-3y<6 4x + 4y < 8 | This sign should be Less than or equal to
*February 21, 2015*

**Physics**

A Ferris wheel 26.0m in diameter rotates once every 19.0s What is the ratio of a person's apparent weight to her real weight at the top and at the bottom? Please help! I know there are other questions similar to this but none of the answers are helping me, they are too ...
*February 20, 2015*

**Math Help**

Hello! Can someone please check and see if I did this right? Thanks! :) Directions: Find the exact solutions of the equation in the interval [0,2pi] cos2x+sinx=0 My answer: cos2x+sinx=cos^2x-sin^2x+sinx =1-sin^2x-sin^2x+sinx =-2sin^2x+sinx+1=0
*February 2, 2015*

**Chemistry**

What are the ppm of each of the atoms contained in a solution that is 655 ppm K3PO4?
*January 11, 2015*

**Math**

A family size pizza is 24$ and costs 3 times as much as a small pizza. How much does the small pizza cost?
*October 6, 2014*

**Englishm**

Write two paragraphs about how social media has changed the way you think about written communication.
*September 13, 2014*

**English**

Can anyone delete this
*September 11, 2014*

**CORRECTIONAL PRACTICE AND POLICY**

So is it B?
*September 9, 2014*

**CORRECTIONAL PRACTICE AND POLICY**

This person, sentenced to life with little hope of parole, could live many years in the prisons of America and whose physical or mental disabilities require more extensive medical and treatment care. A. Infectious offender B. Developmentally challenged offender C. Sex offender...
*September 9, 2014*

**Biochemistry**

10.275
*September 8, 2014*

**mathematics **

One hydrant can fill a truck in 12 minutes, another in 6 minutes . If they are both turned on together how long would the truck take to be filled? 12+6= 18\2= 9 minutes
*July 23, 2014*

**mathematics **

Use the definition of limits to show that Lim x➡ 0 : (x^2 - 9) / (x + 3) = -6 hence find the number d > 0 given that e=0.05
*June 27, 2014*

**statistics**

An average of 1.4 private airplanes arrive per hour at an airport. Let x denote the number of private airplanes that will arrive at this airport during a given hour. Calculate the probability distribution of x. Find the probability that x = 4.
*May 28, 2014*

**probability**

I am lost. How do I figure this out? I know there are 2 ways to get the sum of 5 but do I count it backwards too? 1+4 4+1. How do I know how many sums? Joe rolled two fair number cubes that have faces labeled 1 to 6 each. He rolled the two cubes 180 times. According to the ...
*May 27, 2014*

**calculus**

in the following series x is a real number. In each case use the ratio test to determine the radius of convergence of the series. Analyze the behavior of the series at the endpoints in order to determine the interval of convergence. A) (nx^n)/(n^2 + 2) B)((n^2)(x-2)^n)/2^n C...
*April 12, 2014*

**science**

A 3.5-cm tall object is placed 10.0 cm in front of a concave mirror having a focal length of 14.5 cm. Find the location position and height by drawing a ray diagram to scale. Verify your answer using the mirror and magnification equations. cm (location) cm (height)
*March 26, 2014*

**math**

the area of the curved surface of D battery witha diameter of 3.2 centimeteres and a height of 5.6 Centimeters
*March 20, 2014*

**Physics**

Jack rides his skateboard a total distance of 120 m in 20 sec. What was his speed? 5 seconds after he started Jack was at a distance of 30 meters. 10 seconds after he started he was at a distance of 70 meters. What was Jack’s speed from time = 5 sec to time = 10 sec? Did ...
*February 27, 2014*

**College Chemistry**

If your heating generates soot on the bottom of the crucible, what is the origin of the soot? How will this soot collection affect x? x is the mols of waters of hydration
*February 23, 2014*

**math**

Thank you for the 2nd one I got .04545 on the 3rd one I got 32.7272
*February 11, 2014*

**math**

The length of the highway is 500 miles. If 1 inch represents 100 miles, what is the length of the highway on the map? If on a scale drawing 55 feet are represented by 20 inches, then a scale of 1/8 inch represents how many feet? If 1 inch represents 55 miles on a map, then how...
*February 11, 2014*

**Math**

Cooking for 2 days shrinks a a 3 3/4- -pound ham to 2/3 its original size How many punds is it
*February 10, 2014*

**Math**

A scale drawing has a scale of 1/4 in. :6ft. Find the length on the drawing for each actual length a.18ft b. 66ft c. 204ft
*February 10, 2014*

**Chemistry **

Calculate the amount of energy in calories that is needed to melt 45g of ice at -20°C and then increase the temperature to 95°C
*February 6, 2014*

**math**

When Melissa was born, her parents put $8,000 into a college fund account that earned 9% simple interest. Find the total amount in the account after 18 years.
*February 3, 2014*

**mah**

When Melissa was born, her parents put $8,000 into a college fund account that earned 9% simple interest. Find the total amount in the account after 18 years.
*February 3, 2014*

**Math**

Mona opened a savings account with a $500 deposit and a simple interest rate of 5.6%. If there were no deposits or withdrawals, how much money is in the account after 8/1/2 years
*February 3, 2014*

**math**

Alicia planted 45 tulip bulbs last year.This year she plans to plant 65 bulbs. Find the percent of increase in the number of tulip bulbs to the nearest tenth.
*January 31, 2014*

**math**

When Hugo was 9 years old he was 56 inches tall. Hugo is now 12 years old and he is 62 inches tall. Find the percent of increase in Hugo’s height to the nearest tenth.
*January 31, 2014*

**math**

The 2008 yearbook at Middleton Middle School had 236 candid pictures of students.The 2007 yearbook had 214 candid pictures of students.To the nearest tenth, what was the percent of change in the number of candid student pictures from 2007 to 2008
*January 31, 2014*

**History**

Can someone please check my answers? :) 1. What was the greatest threat to a slave family’s stability? (1 point) the birth of a new baby an increase in cotton production *** a marriage in the slaveholder’s family the slaveholder’s acquisition of new slaves 2. ...
*January 21, 2014*

**math 3rd**

THANK YOU MISS SUE :)
*January 8, 2014*

**math 3rd**

Ok Thank you so then 2.4- 2.3999 would be .0001 or just 1?
*January 8, 2014*

**math 3rd**

I have to subtract 1.- 0.98765= I think it should be 1.98765 but I used the calculator to see if it was right and I get 0.01235 don't understand how that could be right?
*January 8, 2014*

**chemistry**

basic
*January 6, 2014*

**math - inequalities**

How many integers are common to the solution sets of both inequalities? x+7 ≥ 3x 3x+4 ≤ 5x
*December 14, 2013*

**math**

15kg/min=_________g/s
*December 2, 2013*

**Pre-Calc**

Please help me solve these two equations!! Divide and express as a polynomial: 12a^8b^5 - 9a^14b^15 + 6a^6b^10 _____________________________________ 3a^2b^5 Simplify: a/b - b/a __________ a-b/b
*November 27, 2013*

**Algebra 2**

Two Olympic swimmers, Ryan and Michael, create unique ripple waves in the water. The function created by Ryan is f(x) = 4x2 + 7. The function created by Michael is f(x) = 4x2 - 5x + 3. Describe to Ryan and Michael, using complete sentences, which operation results in the ...
*October 2, 2013*

**Math**

When a student sold an xbox on ebay for $153, she was charged a two part final value fee: 5.25% of the first $25.00 of the selling price plus 3.25% of the remainder of the sell price over $25.00. Find the fee to sell the xbox on ebay.
*August 19, 2013*

**Algebra**

a^2-6a+9=0
*July 31, 2013*

**Math**

Steve can kayak at 8 km/h in still water. On the river, Steve and the kayak travel slower upstream due to the current. It takes him 1.5 h for a trip downstream, but 3.25 h for the same distance upstream. Determine the speed of the river’s current.
*June 19, 2013*

**chemistry**

how would you solve the mass of sucrose, C12H22O11, that is needed to make 550ml of a 0.25M solution?
*April 14, 2013*

**Business math**

PROBLEM 1 The video discusses the requirements of a package to qualify as freight. A package must weigh at least 151 pounds. It must be palletized, stackable, forklift-friendly and shrink-wrapped or banded for stability. The uniform cargo footprint can be no larger than 16 ...
*April 11, 2013*

**maths - two dimensional motion**

The problem I am trying to solve is from AQA Mechanics M1 and is as follows: An object is moving in a plane. At time t=0, it is at the origin, O, and moving with velocity u. After 2 seconds it is at A where OA = -2i - 4j. After a further 3 seconds it is at B where AB = 10i - ...
*April 9, 2013*

**Math**

If c stands for cups then if June makes the recipe as it stands she will use 2 1/2 + 1 1/3 + 1 3/4 cups of liquid (67 /12) But she makes 4 times that amount so she makes 67/3 cups. In whole number of cups that's 22 cups.
*April 9, 2013*

**math**

The problem I am trying to solve is from AQA Mechanics M1 and is as follows: An object is moving in a plane. At time t=0, it is at the origin, O, and moving with velocity u. After 2 seconds it is at A where OA = -2i - 4j. After a further 3 seconds it is at B where AB = 10i - ...
*April 9, 2013*

**chemistry**

how does the solubility of gases in water compare to the solubility of solids in water as the temperature of the solution increases?
*April 2, 2013*

**8th Math - Probability**

ummmmmmmmmmmm. Haha jkjk. I know the answer, but think about it... what is the point of school, if you ask someone else to do it.... Oh, and by the way, this isn't 8th grade math! This is 7th grade math, I'm just did this quiz and got 100%. Just try next time!! Its not...
*April 2, 2013*

**Chemistry**

a.) 0.0122mol x 140gSi3N4 = 1.708 molSi3N4 b.) 0.0122mol x 59g(CH3)3N =0.7198 mol(CH3)3N
*April 2, 2013*

**Math**

Bus A leaves interchange 6 minutes, Bus B leaves 12 minutes later, Bus C leaves 18 minutes later. If all buses leave at 6 am when will all 3 buses leave at the same time again. Kindly show workings and explantion to problem. Thank you
*March 14, 2013*

**St francis**

Abcd is a quadrilateral such that AB = bc, ad= 1/4am. If bc 12 what is the perimeter of abcd
*February 6, 2013*

**science**

How to determine the amount of energy released when 50g of 100C steam changes to 0C ice?
*January 24, 2013*

**Math**

A rug covers 1/4 of floor. The area of the rug is 10 ft.2. What is the area of the floor?
*January 15, 2013*

**Chem 2**

If we burn a strip of magnesium in air, there will be two main products, magnesium oxide and magnesium nitride. If we then treat that mixture with water, the nitride ion is converted to ammonia. After boiling away the water and ammonia, we would be left with only magnesium ...
*January 13, 2013*

**Chemistry**

How do you demonstrate that fog, clouds,and steam are liquid droplets and not water vapor?
*January 10, 2013*

**Chemistry**

Find the total number of calories needed to change 23.0 g of ice at -34.0C to steam at 222.0C
*January 10, 2013*

**Chemistry**

What is the equation to show that boiling is a cooling process?
*January 10, 2013*

**Physics**

A weight is hung from the ceiling of an elevator by a massless string. under which circumstances will the tension in the cord be the greatest? smallest? a.) The elevator rises with decreasing speed b.) The elevator rises with increasing speed c.) The elevator is at rest d.) ...
*December 11, 2012*

**Physics**

... we havn't even learned about Kinetic energy yet... my teacher must be losing it.... haha
*December 5, 2012*

**More Physics**

I have NO idea how to do this! any help is great! A car with a mass of 1330kg is traveling at 28m/s. The driver applies the brakes to bring the car to a rest over a distance of 79m. Calculate the retarding force acting on the car. From this i can see that it gives me the Mass:...
*December 5, 2012*

**Physics**

A mouse pushes a piece of cheese with a mass of 6.4 g for a distance of 75 cm over a frictionless surface. He exerts a constant 0.5 N force as he does so. If the cheese starts from rest, what is it's final velocity? there is no time or speed givin, which throws me off
*December 5, 2012*

**Physics -movies**

There are many Hollywood movies which show a hero or villian running, jumping, or riding a motorcycle through big plate glass windows without apparent injury. Why is this an incredible violation of Newton's laws? i can't think of really anything that makes sense...
*December 5, 2012*

**Science ~conversions~**

oops. correction. the spider is pulling with .011N. NOT .001
*December 5, 2012*

**Science ~conversions~**

On my physics home work i have a question that puts the weight in grams, and i need to find the acceleration. I know that the formula is F=ma, and Force is in newtons, mass is in kg and acceleration is in m/s^2. but can you still find the acceleration by using grams with out ...
*December 5, 2012*

**Physics HELP!**

I have NO idea how to do this! any help is great! A car of maass 1330kg is traveling at 28m/s. The driverapplies the brakes to bring the car to a rest over a distance of 79m. Calculate the retarding force acting on the car. From this i can see that it gives me the Mass:1330kg ...
*December 4, 2012*

**College History**

Thank you again for your time
*November 30, 2012*

**College History**

I have quite a few that I couldn't figure out on my assignment. 1) The leading symbol of reforming state governments in rhe early 1900's was A) Theodore Roosevelt B) Woodrow Wilson C) Robert La Follette D) Upton Sinclair 2) Wilson's first dealings with Congress ...
*November 30, 2012*

**College History**

thank you!
*November 30, 2012*

**College History**

Which of the following was NOT a result of the great migration of blacks in the 1920s? A) Blacks found they someetimes were able to work in jobs that has been closed to them in the South. B) African American consciousness was raised, providing feelings of greater autonomy and ...
*November 30, 2012*

**Physics**

A person is riding a bicycle, and its wheels have an angular velocity of 17.7 rad/s. Then, the brakes are applied and the bike is brought to a uniform stop. During braking, the angular displacement of each wheel is 12.4 revolutions. (a) How much time does it take for the bike ...
*October 30, 2012*

**Physics**

A star rotates in a circular orbit about the center of its galaxy. The radius of the orbit is 6.2 x 1020 m, and the angular speed of the star is 4.3 x 10-15 rad/s. How long (in years) does it take for the star to make one revolution around the center?
*October 30, 2012*

**chem**

How do you prepare a solution of 12 M HCl and want to prepare 500 mL of a 0.4 M solution. Assume you have a 500-mL volumetric flask
*October 16, 2012*

**math**

MEghan had 36 books in her locker. Some were library books, text books and the rest were telephone books. THe number of library books and phone books combined equals twice the number of text books. The number of text books and telephone books equals three times the number of ...
*September 30, 2012*

**visual**

"Street, Dresden", 1907, oil on canvas by Ernst Ludwig Kirchner. Describe the shapes in this painting. Are the shapes organic or geometric? Which ones? Describe how the shapes interact, or "touch" each other. Are the edges of the shapes soft or hard? Do ...
*September 15, 2012*

**visual**

"Street, Dresden", 1907, oil on canvas by Ernst Ludwig Kirchner. Describe the shapes in this painting. Are the shapes organic or geometric? Which ones? Describe how the shapes interact, or "touch" each other. Are the edges of the shapes soft or hard? Do ...
*September 15, 2012*

**PHYSICS**

A railroad diesel engine weighs 3.9 times as much as a freight car. The diesel engine coasts at 5.3 km/h into the freight car that is initially at rest. After they couple together, what is their speed?
*September 10, 2012*

**PHYSICS**

A railroad diesel engine weighs 3.9 times as much as a freight car. The diesel engine coasts at 5.3 km/h into the freight car that is initially at rest. After they couple together, what is their speed?
*September 10, 2012*

**math**

All you have to do is put 39 in for h. So you get 39=-16t+1444. And solve.
*September 6, 2012*

**algebra**

A tugboat goes 180 miles upstream in 15 hours. The return trip downstream takes 10 hours. find the speed of the tugboat without a current and the speed of the current
*August 9, 2012*

**english**

and i need to talk about the impression of the medical officer and Chaplain. thanks
*July 13, 2012*

**english**

yes, thats the editorial i have to do i also need to say how the writer managed to develop ideas that they present in the opening paragraph and talk about structural and linguistic devices.
*July 13, 2012*

**english**

With close reference to the text how successful is the headline in influencing the reader's view of the issue of hang? the title: THE WOMAN WHO HANGS TODAY
*July 13, 2012*

**Physics Angular displacement**

A school bus takes 0:53 hours to reach the schoool from your house. If the average speed of the bus is 19km/h, what is the displacement of the bus during the trip?
*July 1, 2012*

**Math Help**

It's not the 6th bounce? Because when I put 6 into the equation I got 5/9
*May 8, 2012*

**Math Help**

The end of a spring is pulled as far as it will go and then is released. On the first bounce back it extends 135 cm. On its second bounce back it extends 45 cm. On its third bounce back it extends 15 cm. How many times will the spring bounce back before it extends 5/9 cm? I ...
*May 8, 2012*

**Math**

The end of a spring is pulled as far as it will go and then is released. On the first bounce back it extends 135 cm. On its second bounce back it extends 45 cm. On its third bounce back it extends 15 cm. How many times will the spring bounce back before it extends 5/9 cm? I ...
*May 7, 2012*

**chemistry**

Ethylene glycol, C2H6O2, is used as antifreeze for automobile engines. If you want to produce 2.00 kg of ethylene glycol from the reaction of C2H4Cl2 and Na2CO3, what is the minimum amount of Na2CO3 that is needed? C2H4Cl2(l) + Na2CO3(s) + H2O(l)=C2H6O2(l) + 2NaCl(aq) + CO2(g)
*April 27, 2012*

**Math**

simplify the expression below,using the laws of exponents. (5^4 x 5^7)/ 5^8 Show your work. PLEASE HELP ME!
*April 15, 2012*

**physics**

Use these magnitudes of the forces of gravity at Earth's surface to determine the masses of the objects on which they act A)0.98N. B)62N C)44.5MN
*March 30, 2012*

**physics**

Use these magnitudes of the forces of gravity at Earth's surface to determine the masses of the objects on which they act A)0.98N. B)62N C)44.5MN
*March 30, 2012*

**physics**

Thanks
*March 30, 2012*

**physics**

What is the weight of each of the following masses at Earths surface? A) 25g. B)102kg. C) 12mg
*March 30, 2012*

**physics**

Each of the four wheels of a car push on the road with a force of 4.0*10^3 N [down]. The driving force on the car is 8.0*10^3 N [W]. The fictional resistance on the car is 6.0*10^3 [E]. Calculate the following A) the mass of the car B) the net force on the car C) the cars ...
*March 29, 2012*

**Pre-Algebra**

What is (41x + 67y) + (49x - 28y) simplified?
*March 13, 2012*

**chemistry**

A 20.0 mL sample of an aqueous HClO3 solution is titrated with a 0.0275 M KOH solution. The equivalence point is reached with 28.5 mL of the base. The pH of the HClO3 solution, before titration, is
*March 13, 2012*

**calculus**

find the second-order partial derivatives of f(x,y)=x^3 + x^2y^2 + y^3 + x+y and show that the mixed partial derivatives fxy and fyx are equal
*March 7, 2012*

**calculus**

find the second-order partial derivatives of f(x,y)=x^3 + x^2y^2 + y^3 + x+y and show that the mixed partial derivatives fxy and fyx are equal
*March 7, 2012*

**calculus**

find the domain of the function a) f(x,y) = e^(-xy) b) h,(u,v)= √(4-u^2 - v^2)
*March 7, 2012*