Wednesday

April 16, 2014

April 16, 2014

Total # Posts: 68,113

**trig**

Thanks a lot.

**trig**

Help! Ships A and B leave port at the same time and sail on straight paths making an angle of 60 degrees with each other. HOw far apart are the ships at the end of 1 hour if the speed of ship A is 25 km/h and that of ship B is 15 km/h?

**physics**

A billiard ball of mass m = 0.250 kg hits the cushion of a billiard table at an angle of θ1 = 70.0° at a speed of v1 = 2.50 m/s. It bounces off at an angle of θ2 = 63.0° and a speed of v2 = 2.10 m/s.

**Science**

An example of a renewable and inexhaustible resource that requires the construction of dams is _________________________ energy. hydroelectric

**Science**

Geothermal power would be classified as a(n) _____________________ resource because its supply will not run out. renewable

**math**

the current ratio of boys to girls at a certain school is 2 to 5 . if 12 additional boys were added to the school, the new ratio of boys to girls would be 4 to 9. how many boys currently attend the school?

**chemistry**

G=NEV

**math**

A product cost $100, 90% of the price being production cost,the remainder being tax, if the govt raises the tax by 50%, by how much in % will the factory have to reduce its production cost to keep he price still at $100

**Algebra**

What is the focus and directrix of the graph: x-3y^2=0?

**math**

Sam buys a lamp during the sale. There was a discount of 20%. If the original price is $4, what is the sale price?

**math**

A pen is marked down 40% from the original price. The original price was $50. What is the sale price before sales tax?

**SOCIALS, (Canada confederation)**

There is a reason why I posted this question because I read the book and it gives me NO information and I have already completed my other questions but these are the ones I have left

**SOCIALS, (Canada confederation)**

1. List in order of importance three ways the United States was a factor in the canadian Confederation. defend your choices with examples 2. explain the concept of manifest destiny. how much of a threat to British North America was the United States? 3. explain the "doubl...

**chemistry**

How you solve P4(s)+5O2(g)------>P4O10(g) .if 2.50 grams of phosphorus is ignited in a flask how many grams of P4O10 are formed ?

**Science**

In the temperature forest what are interactions with other organisms

**Science **

how does interdependence of organisms within an ecosystem aid survival in a temperate forest

**math**

Please help!pam is mixing 3 1/5 batches of paint.if one batch calls for 2 3/4 tablespoons of detergent to add to the tempura powder,how many tablespoons of detergent will pam need?

**world geography**

The statement, "People celebrate their birthdays on January 1st" is an example of what type of region?

**english**

How does an inclined plane impact work?

**Math**

Can u help me on this you have to convert inches into feet 1 inch = 8 feet and how do I do this with 2 1/4inches and also 1/10inches

**Chemistry**

a solution is prepared by dissolving 3.7500grams iron(III) oxalate in enough water to make 125.00mL of solution. 1. what is the molar concentration of iron(III) oxalate in this solution? 2. what is the molar concentration of oxalate ions in this solution?

**Chemistry**

a potassium dichromate is prepared by 0.3525grams of K2Cr2O7 is enough water to yield 250.0mL of solution. a student then measures 10.00mL of an unknown solution of Fe2+ into an erlenmeyer flask and dilutes with 90mL of 1.0M hydrochloric acid. she then titrates this sample wit...

**Physics**

The impulse given to a ball with mass of 4 kg is 16 N s. If the ball starts from rest, what is its final velocity?

**chemistry**

The molarity of an aqueous solution of barium hydroxide is determined by titration against a 0.335 M nitric acid solution. If 32.8 mL of the base are required to neutralize 21.5 mL of nitric acid, what is the molarity of the barium hydroxide solution?

**Math**

Convert 1-/10 1 inch=8 feet

**English**

Paper Bags — A Great Choice Am I supposed to use an em dash for the sentence above?

**English**

Metaphor for repugnance His biggest repugnance is guest who are always late

**Algebra Question~!**

The quadratic formula would also work here, right?

**geometry**

What is the vertex angle of an isosceles triangle with sides that measure of 22, 22, and 28 millimeters.

**English**

Metaphor for confusion The math problem was a maze at trying to solve.

**English**

Metaphor for repugnance His biggest repugnance is guest who are always late

**Math**

1. Mackenzie spent a lot of time on her project for Columbus Day. On Monday she worked for 2 hours and 33 minutes on making a poster. On Tuesday she worked for 1 hour and 28 minutes drawing a picture of Columbus. On Wednesday she spent two hours building a model of a Taino vil...

**biology**

Sperm cells are moved out of the testes in the

**Science**

A______________________ is a tool used to capture the energy in sunlight. Recycling aluminum cans and taking shorter showers are two ways to practice the ________________________ of natural resources. Some plastics are made from corn. These plastics are biodegradable. This mea...

**English**

I need to write a metaphor for the word Repugnance. I definitely am lost on this one.

**chem Help**

At equilibrium, the concentrations in this system were found to be [N2]=[O2]=0.200 M and [NO]=0.500 M. N2 + O2= 2NO If more NO is added, bringing its concentration to 0.800 M, what will the final concentration of NO be after equilibrium is re-established?

**Math**

Did I get the average speed and nine days traveled correct

**Math**

6. Columbus' ships covered approximately 144 miles a day. How many miles would they have traveled in nine days? What was the average speed per hour? If there were two days when the weather did not permit movement, how many miles a day would they have to travel to make up t...

**calculus**

Twenty feet wire is used to make two figures? What is the maximum areas of enclosed figures.

**socials TO MS SUE OR ANYONE**

List the factors that supported the confederation in the canada colonies in the 1800s and the factors that went against the confederation in the colonies. PLEASE help ASAP!!!!

**statistics**

Survey on concern for criminal in a survey 3 of 4 students said the court show too much concern for criminals find the probability that 3 out of 7 randomly selected students will agree with this statement

**sociology**

5. Which evidence would best support the claim that prayer in school should be allowed? @This is a holistic problem answered by studying various aspects of chapter 2. (Points : 1)

**arithmetic**

Select the first five terms in the arithmetic sequence an = 4n, starting with n = 1.

**Chem Please Help**

Thanks!

**Chem Please Help**

If a 2.30 M sample of A is heated to 500 K, what is the concentration of B at equilibrium? A<-> 2B Kc= 5.04x10^-6 at 500k

**math**

When I am rounded to the nearest ten I am 40 the sum of my digits is 8 what two numbers can I be

**Programing**

Write a full program that reads in an arbitrary sequence of integers from the standard input, and writes them to the standard output in sorted order and with all duplicates removed. You may assume the input contains at most 100 integers . What I have is #include<iostream>...

**Programing**

Given two 3x3 arrays of integer , x1 and x2 , write the code needed to copy every value from x1 to its corresponding element in x2 . So far I have void main() { int x[3][3]; for(i=0; i<x1, i++) { for(j=0; j<x2, i++) { x[i][j]=i; cout<<x[i][j]<<" "; ...

**physics**

The figure below shows a claw hammer being used to pull a nail out of a horizontal board where θ = 32.2°. The mass of the hammer is 1.00 kg. A force of 125 N is exerted horizontally as shown, and the nail does not yet move relative to the board. Assume the force the h...

**Physics**

What element results if two protons and two neutrons are ejected from a radium nucleus?

**college physics 2**

A healthy astronaut's heart rate is 60 beats/min. Flight doctors on Earth can monitor an astronaut's vital signs remotely while in flight. How fast would an astronaut be flying away from Earth if the doctor measured her having a heart rate of 28 beats/min?

**Science URGENT**

He said he's not giving us the answers and I really need to check my answers all the time but I can't cause the answers don't come with the textbook. And I don't find it fair cause our math text books have the answers so why don't our science texts? But any...

**Science URGENT**

Ignore this question

**Science URGENT**

Is there any website or any way I can get the science probe 10 check your understanding answers cause I want to check my answers?

**math**

Find the percent if discount when the regular price for a DVD recorder is $250 and its sale price is $175

**Science**

The text book is called BC science probe 10 It's for grade 10

**Science**

Is there any website or any way I can get the science probe 10 check your understanding answers cause I want to check my answers?

**math**

Thank you so much! :D have a nice night

**math**

Please help! I am confused on what to do next. I subtracted the 700 by 560 and got 140 so then I divided by 700 and got 5?

**math**

What is the percent of discount on a television that originally sold for $700 and is now on sale for $560?

**Math!**

I have now noticed my error. Thank you!

**English**

Is this a complete sentence or a sentence fragment? "Applications truly welcomed."

**Math**

500 gallon sprayer that puts out 20 gallons of spray per acre. How many times will the sprayer have to be filled to spray 106.363 acres?

**Math probability**

Trevor's soccer bag holds lots of socks: 4 red, seven green, three white, and two purple. He takes two socks, what is the probability that he will get red and green socks?

**Geometry**

I could also use the formula of a sphere

**Math**

Each ticket bought is $2.25. Each ticket bought Gives one chance in the drawing. Jose Purchased 10 tickets. If there were 510 tickets Purchased in all, what is the probability that One of Jose's ticket's will be drawn first? 10/510 or1: 52 chance

**Math**

Each ticket bought is $2.25. Each ticket bought Gives one chance in the drawing. Jose Purchased 10 tickets. If there were 510 tickets Purchased in all, what is the probability that One of Jose's ticket's will be drawn first? 10/510 or1: 52 chance

**Math**

73 divided by 150 comes out to be about 49%. What am I doing wrong

**Math**

If there were 150 animals, of which 73 were rabbits and the rest are chickens.. What percentage of the animals were chicken? Is it 48%

**physical science**

How many kilocalories of heat does the operation of a 1285 W hair dryer produce each second?

**Chemistry**

A helium ballon contains 0.32g of helium. Given the molecular weight of helium is 4. How many moles of helium does it contain.

**Science**

What tool is used to capture the energy in sunlight?

**English **

Which is President Kennedy’s intent when using questions in the last paragraph of this excerpt?

**chemistry**

2NO (g) + Cl2 (g) <=> 2NOCl (g) (reversible) equilibrium constat = 1 x 10^7 @ certain temp NO = 2.8 x 10^-2 mol Cl2 = 1.4 x 10^-3 mol NOCl = 5.9 mol all mixed in a 1.4 L flask what is Qc and what direction will system go?

**chemistry**

shouldn't it be -2x?

**chemistry**

equilibrium constant = 2.180 x 10^6 @ 730 C. H2 (g) + Br (g) <=> 2HBr (g) (reversible) startin with 3.20 moles of HBr in a 21.3-L reaction vessel, calculate the concentrations of H2, Br2, and HBr at equilibrium idk how to start my ice table

**chemistry**

equilibrium constant = 55.3 @ certain temperature H2 (g) + I2 (g) <=> 2HI (g) (reversible) If you start with 0.195 M hydrogen iodide, what will the concentrations of H2, I2, and HI be at equilibrium?

**history**

All of the following were anti-modern reactions except A. fundamentalism B. Ku Klux Klan C. cultural anthropology D. arts and crafts movement E. prohibition F. None of the above would it be fundamentalism?

**Calculus**

The circle defined by the equation x^2 + y^2 = 18 has two points where the slope of its tangent line is m=1. Find those points.

**chemistry**

How many grams of Li2O must be carried on board to remove 85.0kg of water?

**Calculus: Integral**

I don't understand how to do this one integral problem that involves secant. I'm asked to find the integral of sec^4 (4x). I'm not really sure how to go about solving this problem.

**chemistry**

Assume that 0.0200 mole of a gas is collected in the lab by water displacement. If the temperature of the gas is 26.0oC and the total pressure in the gas tube is 745 mm Hg (including water vapor), what is the volume in liters of the dry gas? (Use the ideal gas law.)

**math**

The two fractions below cannot be simplified as they are, but if you switch the numerators, they can be simplified. What property allows us to do this? 2/3 x 3/8

**Math**

The ratio of the number of boys to the number of girls in Mr. Brown's class is 5:4. Which of the following can be calculated using the information given? A. The number of girls in Mr. Brown's class B. The number of boys in Mr. Brown's class C. The ratio of the numb...

**Math**

Michael has a science project due. He knew that it would take him 4 hours to complete the project. He needed to spend 50% of his time on his experiment, 40% of his time on his analysis, and 10% on putting his project together. What is the ratio of time spent putting his projec...

**Math**

The height of an elephant in a scale drawing is 4 cm. The scale in the drawing is 1 cm to 50 in. What is the actual height of the elephant. A. 200 in B. 400 in C. 53.5 in D. 25 in

**Math**

In Mrs. Julie's classroom the ratio of boys to girls is 12 to 8. If the entire elementary school has a population of 400 students, how many would you expect to be girls?

**Math**

The Look Alike Doll Company makes dolls that resemble people. Pam's mom is having a doll made to look alike Pam. Pam is 5 feet tall. The doll will be 2 1/2 feet tall. What is the ratio of the doll's height to Pam's height?

**Math**

Jason drew two circles. the diameter of the larger circle is twice the diameter of the smaller circle. What is the ratio of the circumference of the smaller circle to the circumference of the larger circle?

**Math**

The height of an elephant is a scale drawing is 4cm. The scale in the drawing is 1 cm to 50 in. What is the actual height of the elephant?

**Math**

The population of some countries has a relative growth rate of 2.75% per year. At this rate, how many years (to the nearest tenth of a year) will it take the population to double?

**US government**

over time _____ has gained power at the expense of ____.

**Math**

your class is conducting an experiment to study geometric sequences. The class forms a line. the first person takes a whole pizza,divides it in half, keeps half, and hands it to the next person. The next people in line do the same with there peices. Which portion does the seve...

**DATABASE.PLEASE!!**

yes dodo

**Math**

A physics exam consists of 9 multiple-choice questions and 6 open-ended problems in which all work must be shown. If an examinee must answer 5 of the multiple-choice questions and 2 of the open-ended problems, in how many ways can the questions and problems be chosen?

**survey math 140**

a textbook search is considering 19 books for possible adoption. the committee has decided to select 5 of the 19 for furture consideration in how many way can id do so

**physic angular momentum and torque**

Radius = 4 feet; height = 6 feet

**algebra**

The height of a ball dropped from a tall building is modeled by the equation d(t) = 16t2 where d equals the distance traveled at time t seconds and t equals the time in seconds. What does the average rate of change of d(t) from t = 2 to t = 5 represent?

**alegbra 1**

A company manfactures an alarm clock. Three weeks ago the company had 250 on hand. Two weeks from now it will have 500. Assume the company will continue to make the clocks at the same rate.

**Finance**

10. A new factory at Arcata requires an initial outlay of $3.5 million to be paid immediately. The factory will last for eight additional years, after which it can be sold for a salvage value of $2,000,000. Sales will be $800,000 during the first year of operation and will gro...

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