Thursday

July 24, 2014

July 24, 2014

Total # Posts: 340

**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

**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

**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.

**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 the...

**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) ...

**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)

**math**

the area of the curved surface of D battery witha diameter of 3.2 centimeteres and a height of 5.6 Centimeters

**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 ...

**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

**math**

Thank you for the 2nd one I got .04545 on the 3rd one I got 32.7272

**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...

**Math**

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

**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

**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

**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.

**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.

**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

**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.

**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.

**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

**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. Wh...

**math 3rd**

THANK YOU MISS SUE :)

**math 3rd**

Ok Thank you so then 2.4- 2.3999 would be .0001 or just 1?

**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?

**chemistry**

basic

**math - inequalities**

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

**math**

15kg/min=_________g/s

**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

**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 large...

**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.

**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.

**Algebra**

a^2-6a+9=0

**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.

**chemistry**

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

**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 squ...

**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 - 4...

**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.

**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 - 4...

**chemistry**

how does the solubility of gases in water compare to the solubility of solids in water as the temperature of the solution increases?

**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...

**Chemistry**

a.) 0.0122mol x 140gSi3N4 = 1.708 molSi3N4 b.) 0.0122mol x 59g(CH3)3N =0.7198 mol(CH3)3N

**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

**St francis**

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

**science**

How to determine the amount of energy released when 50g of 100C steam changes to 0C ice?

**Math**

A rug covers 1/4 of floor. The area of the rug is 10 ft.2. What is the area of the floor?

**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 oxi...

**Chemistry**

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

**Chemistry**

Find the total number of calories needed to change 23.0 g of ice at -34.0C to steam at 222.0C

**Chemistry**

What is the equation to show that boiling is a cooling process?

**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.) Th...

**Physics**

... we havn't even learned about Kinetic energy yet... my teacher must be losing it.... haha

**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:...

**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

**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...

**Science ~conversions~**

oops. correction. the spider is pulling with .011N. NOT .001

**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 c...

**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 ...

**College History**

Thank you again for your time

**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 aft...

**College History**

thank you!

**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 ...

**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 ...

**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?

**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

**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 l...

**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 th...

**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 th...

**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?

**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?

**math**

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

**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

**english**

and i need to talk about the impression of the medical officer and Chaplain. thanks

**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.

**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

**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?

**Math Help**

It's not the 6th bounce? Because when I put 6 into the equation I got 5/9

**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 ha...

**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 ha...

**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)

**Math**

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

**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

**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

**physics**

Thanks

**physics**

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

**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 acce...

**Pre-Algebra**

What is (41x + 67y) + (49x - 28y) simplified?

**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

**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

**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

**calculus**

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

**International Buisness**

The marketing department is asked to formulate a strategy for disseminating product information on new drug Tigason. As the marketing manager what do you recommend?

**physics**

What is the speed in meters per second of a baseball traveling at 64 mph given that 1 mph = 0.447 m/s?

**social studies**

our teacher give us this topic to write an assay. I was told not to go to that place ,but I still went there. he told us that is a narrative essay but I don't understand this topic. can u help me ?

**Spelling**

Hello, my daughter has to alphabetize a list of words that also include multiple words. Example: anyway any way everyone every one already all ready I think the "one" word words should go first, followed by the "two" word words. Is this correct? Thanks!

**Language Arts**

I need some help. These are analogies from the Word Within a Word book; List 7: Pugilist is to Pugnacious as... mystagogue is to religious dermatologist is to dermatitis police is to police pedagogue is to pedant Pachyderm is is to Hypodermic as... pedagogue is to demagogue gi...

**Chemistry**

Okay, I understand now, it's much easier than I was making it out to be! Thanks so much for your help!

**Chemistry**

What is wrong with these sets? Fix what's wrong: n=4, l=3, ml=4 n=2,l=-1, ml=1 I don't exactly even know what the question is asking!

**BUS 640 **

Bridget's choice - theory of consumer behavior

**physics**

A mass m is gently placed on the end of a freely hanging spring. The mass then falls 29.8 cm before it stops and begins to rise. What is the frequency of the oscillation?

**Physics**

A mass m at the end of a spring vibrates with a frequency of 0.936 Hz. When an additional 558 g mass is added to m, the frequency is 0.634 Hz. What is the value of m?