# todd

Most popular questions and responses by todd-
## chemistry

How many kilojoules are required to melt 15g of ice at 0 degrees C, and raise the temperature of the liquid that forms to 85 degrees C?

*asked on September 19, 2016* -
## Math

A trash company is designing an open-top, rectangular container that will have a volume of 135 ft^3.The cost of making the bottom of the container is $5 per square foot, and the cost of the sides is $4 per square foot. Find the dimensions of

*asked on October 8, 2016* -
## Physics

I don't completely understand what this question is asking: Three people are standing on a horizontally rotating platform in an amusement park. One person is almost at the edge, the second one is (3/5)R from the center, and the third is (1/2)R from the

*asked on December 15, 2014* -
## ela PLE IVE ME RIGHT ANSWERS I REALLY NEED HELP

2. IN ONOMONIAPEIA WHAT dose the speaker mean to convey with the following lines Splash/splatters/scatters/spurts a. the water is not running b. the water is running regularly c. the water is running slowly d. the water is running irregularly 4. identify

*asked on February 10, 2017* -
## math

A small plane is flying a banner is 144 square feet. The width of the banner is 1/4 the length of the banner. What are the dimensions of the banner?

*asked on February 2, 2015* -
## Chemistry

Comment on the relative acidities of h3po4 and the h2po4 ion? I don't understand what this question is asking? Would H3PO4 is a strong acid and will completely dissociate into ions in aqueous solution suffice?

*asked on February 26, 2013* -
## Chemistry

"A voltaic cell is constructed by immersing a strip of sillver metal in a 1.0 MAgNO3 solution and a strip of cadmium metal in a 1.0M Cd(NO3)2 solution. The circuit is completed by a wire and a salt bridge in the usual way. a. Write the balanced overall

*asked on March 10, 2011* -
## PHYSICS

An alpha particle (which has two protons) is sent directly toward a target nucleus containing 80 protons. The alpha particle has an initial kinetic energy of 0.79 pJ. What is the least center-to-center distance the alpha particle will be from the target

*asked on April 10, 2008* -
## physics

A person sitting in a chair (combined mass 80kg) is attached to a 6m long cable. The person moves in a horizontal circle. The cables angle is 62 degrees below the horizontal. What is the persons speed? Note: the radius of the circle is not 6m. I really

*asked on December 15, 2014* -
## chem

A solution of ammonia and water contains 3.80×1025 water molecules and 5.80×1024 ammonia molecules. How many total hydrogen atoms are in this solution?

*asked on January 21, 2015* -
## Applied statistics for business and economics

Only 0.02% of credit card holders of a company report the loss or theft of their credit cards each month. The company has 15,000 credit cards in the city of Memphis. Use the Poisson probability tables to answer the following questions. What is the

*asked on October 24, 2010* -
## Physics

Fairgoers ride a Ferris wheel with a radius of 5.00 {\rm m} . The wheel completes one revolution every 31.5 s What is the average speed of a rider on this Ferris wheel? If a rider accidentally drops a stuffed animal at the top of the wheel, where does it

*asked on July 1, 2010* -
## World history

How did the status of slaves in African society contrast with the Americas? What rights and opportunities were available to slaves in African but limited or prohibited in the Americas ?

*asked on December 4, 2015* -
## Math

Find f if f′(x)=2/x,x

*asked on April 16, 2019* -
## algebra

Marlene drive 540 miles to visit friend. drive for 3 hours then stopped for gas, then drive 4 more hours stopped for lunch. how many more hours do I drive if my average speed for trip is 60 miles per hour ? How would I write an equation?

*asked on December 8, 2011* -
## Physics

1.There are four charges, each with a magnitude of 2.5 µC. Two are positive and two are negative. The charges are fixed to the corners of a 0.29 m square, one to a corner, in such a way that the net force on any charge is directed toward the center of the

*asked on February 7, 2007* -
## statistics

Find the standard deviation, Sigma, for the binomial distribution which has the stated values of n and p. Round your answer to the nearest hundredth. n = 639; p = 0.7

*asked on April 14, 2013* -
## math

3.which one of these is a rational number a 150 b. 441 c. 200 d. 250##

*asked on February 15, 2017* -
## statistics

every year thousands of students take the SAT'S. Recent trends show that the scores on the verbal section follow an approx. normal distribution with mean of 350 and stand. deviation of 110 A)a student is chosen at random. it is noted that only 8% of

*asked on February 10, 2008* -
## Math

Monica stepped outside and began to think how fast she is moving even when she is standing still. Assume that the earth is a sphere with a radius of 3960 miles and Monica is at a latitude of 13∘N. What is Monica's speed due solely to the rotation of the

*asked on October 24, 2016* -
## Maths

A tank with 520L of water begins to leak at a rate of 2L per day, At the same time, a second tank is being filled at a rate of 1L per hour, starting at 0L. How long does it take for the tanks to have the same volume?

*asked on March 14, 2017* -
## MATH

MIKE HAS 2 MATS THAT ARE IN THE SHAPE OF TRIANGLES THE SCALE FACTOR OF THE 2 TRIANGULAR MATS IS 7/9 WHAT IS THE RATIO OF THE PERIMETERS?

*asked on November 2, 2011* -
## Algebra

Write an equation of the direct variation that includes the point (–3, –9). Direct variation can be expressed with this equation: y = kx Using your point, let's find k. -9 = -3k 3 = k Equation: y = 3x Thanks it makes sense

*asked on March 20, 2007* -
## Math

Write 5+7+9+11+13+15+17 in sigma notation.

*asked on January 9, 2015* -
## Physics

A bullet with a mass of 4.0 g and a speed of 650 m/s is fired at a block of wood with a mass of 9.7×10−2 kg. The block rests on a frictionless surface, and is thin enough that the bullet passes completely through it. Immediately after the bullet exits

*asked on August 3, 2010* -
## calculus

Choose the correct quantity to fill in the blank: Integral_______ dx = (ax2 - a2)4 + C.

*asked on April 30, 2011* -
## science physics

1.) What is the Magnitude of the electrostatic force on a +5 C charge 1.75 m to the left of a -2.5 C charge? (show your work) 2.) In What direction does the force on the +5 C charge act? 3.)Calculate the magnitude of the electric field of the -2.5 C charge

*asked on May 14, 2013* -
## Physics

Nitrogen gas is introduced into a large deflated plastic bag. No gas is allowed to escape, but as more and more nitrogen is added, the bag inflates to accommodate it. The pressure of the gas within the bag remains at 1 \rm atm and its temperature remains

*asked on September 1, 2010* -
## Physics

A 95 kg rowboat is initially at rest, until it is pulled toward the dock with a rope with a tension of 30.0 N. The dock is higher than the boat, and the rope makes an angle of 25° at the place where it meets the boat. What is the acceleration of the boat?

*asked on October 31, 2011* -
## Physics

A 90 kg astronaut and a 1100 kg satellite are at rest relative to the space shuttle. The astronaut pushes on the satellite, giving it a speed of 0.24 m/s directly away from the shuttle. Seven-and-a-half seconds later the astronaut comes into contact with

*asked on August 3, 2010* -
## Chem

Identify the conjugate acid-base pairs in the following reactions. (a) NH4+(aq) + OH-(aq) NH3(aq) + H2O(l)

*asked on March 6, 2017* -
## statistics

Do students tend to improve their SAT mathematics (SAT-M) score the second time they take the test/

*asked on July 16, 2013* -
## Physics

A 1.10 kg} block of wood sits at the edge of a table, 0.790 m above the floor. A 1.10×10−2 kg} bullet moving horizontally with a speed of 725 m/s embeds itself within the block. What horizontal distance does the block cover before hitting the ground?

*asked on August 3, 2010* -
## Maths

Nina, Shanti and Belle run a 1000 m race at a constant speed. When Nina crossed the finish line first, she was 200 m ahead of Shanti and 400 m ahead of Belle. When Shanthi crossed the finish line, how far ahead of Belle was she?

*asked on July 22, 2017* -
## Chem.

If 229 g of Pb(NO3)2 and 190 mL of 1.68 M aqueous NaI are reacted stoichiometrically according to the balanced equation, how many grams of Pb(NO3)2 remain? Round your answer to 3 significant figures. Pb(NO3)2(aq) + 2NaI(aq) → PbI2(s) + 2NaNO3(aq)

*asked on February 26, 2010* -
## statistics

Every year thousands of students take the SAT'S. RECENT TRENDS SHOW THAT THE SCORES ON THE VERBAL SECTION FOLLOW AN APPROX. NORMAL DISTRIBUTION WITH MEAN 550 AND STANDARD DEVIATION OF 110 68.26% OF THE STUDENTS WHO TAKE THE SAT VERBAL SCORE BETWEEN ______

*asked on February 10, 2008* -
## calculus

Choose the correct quantity to fill in the blank: Integral_______ dx = (ax2 - a2)4 + C.

*asked on April 30, 2011* -
## Stats

Use this table to answer the questions. Height (in inches) Frequency 50-52 5 53-55 8 56-58 12 59-61 13 62-64 11 1. Identify the class width. 2. Identify the midpoint of the first class. 3. Identify the class boundaries of the first class. 4. Give the

*asked on December 16, 2010* -
## physics

Take the mass of the Earth to be 5.98 × 1024 kg. If the Earth’s gravitational force causes a falling 52 kg student to accelerate downward at 9.8 m/s2, determine the upward accelera- tion of the Earth during the student’s fall. Answer in units of m/s2.

*asked on November 28, 2010* -
## algebra

The speed of a passenger train is 16 mph faster than the speed of a freight train. The passenger train travles 300 miles in the same time it takes the freight train to travel 220 miles. find the speed of each train

*asked on June 22, 2012* -
## Algebra

A bag of M&Ms contains 12 red, 11 yellow, 5 green, 6 orange, 5 blue, and 16 brown candies. What is the probability that if you choose 2 M&Ms from the bag (one after the other) without looking, you will choose 2 yellow ones?

*asked on June 3, 2009* -
## Economics

The demand curve for a monopoly is: 1. the MR curve above the AVC curve. 2.above the MR curve. 3.the MR curve above the horizontal axis. 4. the entire MR curve.

*asked on March 30, 2017* -
## Chemisty

I need a recap of how to do the question below. I just need the basic guidelines: The enthalpy change for the reaction 2H2(g)+O2 > 2H2O is -571.6kJ. Determine the enthalpy change for the decomposition of 24.0g H2O.

*asked on June 26, 2015* -
## programming

Create an application in C# that will accept sales information and calculate the total bill. There are 3 products which can be sold: Product 1 with price of $2.98 Product 2 with price of $4.50 Product 3 with price of $9.75 The application should prompt the

*asked on September 30, 2012* -
## physics

water 20 degrees celsius flows through a 25 mm diameter pipe at a rate of 50 liters per minute. is this laminar or turbulant flow or both?

*asked on February 8, 2011* -
## Math

In one three day weekend, the daily high temperature had a median value of 73. The mean temperature was 74.33 and the range of temperatures was 14. What were the three weekend daily high temperatures?

*asked on December 4, 2009* -
## Maths

Three different numbers have median 2 and range 2. Find the three numbers

*asked on May 1, 2017* -
## math

A fisherman has caught a 5kg fish with a line and is lifting it vertically out of the water. While the fish is still in the water he raises it at a constant speed of 0.4 ms^-1. If the water resists this motion with a force of 6N, what is the tension in the

*asked on October 26, 2013* -
## Physics

200 g of ic is at -5C is dropped into a container containing water at 65C. If the final temperature of the mixture reaches 21C, what mass of water must be present in the container?

*asked on July 22, 2013* -
## Math

Mrs Sue thank you and you are the best

*asked on March 10, 2011* -
## Physics

You shoot an arrow into the air. Two seconds later (2.00 {\rm s}) the arrow has gone straight upward to a height of 32.0 m above its launch point. What is the initial velocity and how long did it take for the arrow to reach 16.0 m above the launch point?

*asked on June 30, 2010* -
## business solutions

formulate a solution that takes into account audience characteristics... requirements, and expectations? the scenerio I have tell 25 classmate that our trip has been canceled for mexico because the bus company filed bankruptcy and they will not be getting

*asked on July 20, 2006* -
## Algebra

12(74y - (6+5Y - 8Z) = Please show work

*asked on March 14, 2011* -
## math

250mg is equal to what percent of a gram or grams

*asked on February 1, 2011* -
## factors

what are the factors of 120 2*60 2*2*30 2*2*2*15 2*2*2*3*5 can you take it any further? 123456789

*asked on November 8, 2006* -
## Dangling Modifiers

Would someone please check these for me to see if they are right. Flying over the oak tree, the farmer saw the flock of birds that had damaged his crops. CHANGED TO :The Farmer saw the flock of birds that had been damasging his crops flying over the oak

*asked on July 23, 2006* -
## math question

An aeroplane flies at 800km/h for one third of its flight time and averages 700 km/h for the entire trip. What is the average speed, in kilometres per hour, over the remaining part of the journey? A. 600 B.750 C.650 D.500 E.625 Could you please explain in

*asked on January 22, 2017* -
## Maths

A cake is divided by removing at each cut one quarter of the cake present before the cut. after three cuts have been made, what is the fraction left of the original cake? Please explain in detail thank you

*asked on January 21, 2017* -
## Math Question

Find the values of the six trigonometric functions of an angle in standard position where the terminal side is going through the point (-1, 1). Sinθ = Cosθ= Tanθ= Cscθ= Secθ= Cotθ=

*asked on December 4, 2014* -
## calculus

find dy/dx if y= (x^5)(e^(x^4))

*asked on March 6, 2012* -
## Statistics

A game is played using one die. There is a$1 charge to play the game. If the die is rolled and shows a five, the player receives $6 back ( a profit of $5 and the original $1). If any other number shows, theplayer loses the original $1. What is the player's

*asked on July 16, 2011* -
## Statistics

There are 6 batteries. Two are defective. If you pull out two batteries, what is the probability that neither are defective? Is this how you solve it? 4/6 X 3/5

*asked on June 20, 2011* -
## Algebra

12(74y - (6+5Y - 8Z) = Please show work

*asked on March 15, 2011* -
## Math

Does anyone know the old formula to calculate a hourly raise from a percentage; I totally forgot. The employee makes $10.50 an hour and is receiving a 1.1% increase.

*asked on March 10, 2011* -
## chemistry

The Ka of stearic acid is 1.3 x 10^-5. what is the Kb of stearate?

*asked on November 15, 2010* -
## Physics

You shoot an arrow into the air. Two seconds later (2.00 {\rm s}) the arrow has gone straight upward to a height of 32.0 m above its launch point. What is the initial velocity and how long did it take for the arrow to reach 16.0 m above the launch point?

*asked on June 30, 2010* -
## grammar

Language—Making Language Nonracist and Nonagist His grandmother really enjoys spending the afternoon at the center for senior citizens. This sentence i feel is right am i missing something. His grandmother really enjoys spending the afternoon at the

*asked on July 11, 2006* -
## Algebra

Four times the sum of 9 and some number is 60. What is the number?

*asked on December 6, 2016* -
## math

a new statue with a circular base is being unveiled. The statue's base has a radius of 8 ft. What is the area of the base? Round to the nearest whole number. Use 3.14 for p.

*asked on March 11, 2016* -
## physics

three antinodes witha peak to peak displacement of 3 cm are observed on a vibrating string of length l and linear density the hanging mass is m what is the velocity of the propagation of transverse waves of the string

*asked on July 25, 2013* -
## Finance

A company has total assets of $8,500,000 and its total turnover of 2.35 times. If the return on assets is 9 percent, what is its profit margin? Please help with a formula?

*asked on March 18, 2013* -
## Math 12th grade

Find the sum of each infinite series, or state that the sum doesn'nt exist 1/7+5/14+25/28+

*asked on December 16, 2012* -
## Statistics

Tony’s father, an accountant, has been listening to Tony tell him about Type I errors and α = .05. He responds: “.05? That means you’re making an error one time in twenty! If I made errors 5 percent of the time I’d be out of a job so fast it would

*asked on December 2, 2012* -
## 2nd grade math

____= 8+2?

*asked on September 26, 2012* -
## math

I have 8 ones and 2 hundreds. I am between 270 and 280. what number am I?

*asked on September 13, 2012* -
## math

i have fewer ones than tens. the value of my tens is 30.what two numbers can i be

*asked on September 5, 2012* -
## Calculus

x^2-5/x lim x=0^+

*asked on April 26, 2012* -
## calculus

Just doing example questions to better understand. Find all first and second partial derivatives for the function u= xy^2+x^2y

*asked on April 23, 2012* -
## PHI 103

In the truth table for an invalid argument

*asked on April 14, 2012* -
## geometry

An airplane descends 3.5 miles over a horizontal distance of 25 miles. How far did the plane actually travel?

*asked on January 18, 2012* -
## finance

Company sales and profits grow at a rate of 30% per year; at the end of 4 years (t4) the growth rate drops to steady 5%. Company recently paid a dividend of $1 per share, and the required return is 20%. What is the value of one share today (t0)? assuming

*asked on December 29, 2011* -
## math

23x17 in expanded algorithm

*asked on September 22, 2011* -
## Statistics

A game is played using one die. There is a$1 charge to play the game. If the die is rolled and shows a five, the player receives $6 back ( a profit of $5 and the original $1). If any other number shows, theplayer loses the original $1. What is the player's

*asked on July 16, 2011* -
## rainwater

What would cause rain water puddle to turn black in color

*asked on June 19, 2011* -
## Algebra

12(74y - (6+5Y - 8Z) = Please show work

*asked on March 15, 2011* -
## physics

Outside air generally contains some water vapor (typically 1-2% by mass). Does it take more, less, or the same heat to raise the temperature of 1kg moist air than is needed to raise the temperature of 1kg dry air by the same amount?

*asked on February 8, 2011* -
## Statistics/Math- Please Help

The company offers two types of sales: 1. Internet sales; 2. Store sales. The marketing research manager believes that the Internet sales are more than 10% higher than store sales. The null hypothesis would be: A. Pinternet–Pstore >.10 B.

*asked on November 16, 2010* -
## Statistics/Math- Please Help

The company offers two types of sales: 1. Internet sales; 2. Store sales. The marketing research manager believes that the Internet sales are more than 10% higher than store sales. The null hypothesis would be: A. Pinternet–Pstore >.10 B.

*asked on November 16, 2010* -
## Physics

Block A and block B (see figure below) are forced together, compressing a spring (with spring constant k = 2220 N/m) between them 2 cm from its equilibrium length. The spring, which has negligible mass, is not fastened to either block and drops to the

*asked on October 7, 2010* -
## Phy

You shoot an arrow into the air. Two seconds later (2.00 {\rm s}) the arrow has gone straight upward to a height of 32.0 m above its launch point. What is the initial velocity and how long did it take for the arrow to reach 16.0 m above the launch point?

*asked on June 30, 2010* -
## busniess

What are the four functions of management?

*asked on April 7, 2009* -
## Public Relations

I am promoting a new product for General Motors in my pr class. I need an objective for this product. Will my objective be one sentence or how will I write it, give me an example please.

*asked on April 6, 2008* -
## statistics

A new treatment for AIDS is to be tested in a small clinical trial on 15 patients.The proportion p^ who respond to the treatment will be used as an estimate of the proportion p of (potential)responders in the entire population of AIDS patients. If in fact

*asked on February 15, 2008* -
## Algebra

simplify the following expression 10x - 12x

*asked on November 9, 2007* -
## Algebra

solve for w w -8 = 9

*asked on November 9, 2007* -
## environmental science

pros and cons of at least three alternative methods for maximizing food production

*asked on October 16, 2006* -
## Maths

A single ordered data set includes the following data. 2, 4, 5, 6, 8, 10, x. What is the largest possible value of x if it is not an outlier?

*asked on April 29, 2017* -
## Maths

If the area of a square is reduced by a factor of 4, how have the sides changed?

*asked on April 22, 2017* -
## Maths

A,B,C are collinear points and AB=BC. If A is the point (4,5) and B is the point (1,-1) find the coordinates of C.

*asked on March 16, 2017* -
## math

Landyn wants to mix concentrate and water together to make her juice. The juice is 15% concentrate and 85% water. Her pitcher can hold 12 cups of juice. How many cups of concentrate does she need?

*asked on March 25, 2015*

## Pages

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