Sunday

January 22, 2017
Total # Posts: 104,162

**chemistry**

Nitric acid can be produced by the reaction of gaseous nitrogen dioxide with water. 3 NO2(g) + H2O(?) ?? 2 HNO3(?) + NO(g) If 900 L of NO2 gas react with water, what volume of NO gas will be produced? Assume the gases are measured under the same conditions. Answer in L.

*December 3, 2016*

**precalculus**

can you please check my work? 7. Find the equation of the parabola y=ax2+bx+c that passes through the points(0,6),(-2,2), and(3,9/2). y=ax2+bx+c 6=a(0)2+b(0)+c 2=a(-2)2+b(-2)+c 9/2=a(3)2+b(3)+c 6=c 2=4a+(-2b)+6 9/2=9a+3b+6 -4=4a-2b -3/2=9a+3b a=-1/2, b=1 y=(-1/2x)-x+6

*December 3, 2016*

**tss**

Find the dimeter of circle if radious is 5

*December 3, 2016*

**Tax Course**

7. 1655

*December 3, 2016*

**Tax Course**

Can you help me with these questions? Can you double check my answers? 1. Which of the following deductions may not be claimed on Form 1040A? Educator expenses. Moving expenses.* Student loan interest deduction. Tuition and fees deduction. 2. Dorothy Fonda is an unmarried head...

*December 3, 2016*

**University**

17. neutralizing 20 ml 5.66% potassium hydroxide solution density of 1.053 g / cm3 matter 12.1 ml sulfuric acid density of 1.052 g / cm3. Determine the concentration (%) sulfuric acid solution.

*December 2, 2016*

**Physics**

A 0.5 kg air-track car is attached to the end of a horizontal spring of constant k = 20 N/m. The car is displaced 15 cm from its equilibrium point and released. a) What is the car's maximum speed? b) What is the car's maximum acceleration? c) What is the frequency f of...

*December 2, 2016*

**Physics**

A mass (0.5 kg) and spring (k = 250 N/m) system oscillates with an amplitude of 3.5 cm. a) What is the total mechanical energy of the system? b) What is the maximum speed of the mass? c) What is the maximum acceleration of the mass? I need help please! Do it step by step and ...

*December 2, 2016*

**Physics**

Kate (m = 50 kg) is swinging on a tire tied by a (light) rope (L = 3 m) to a tree limb. Her twin Ashley comes along and squeezes into the tire with her. Assume that at all times the centre of mass of the person(s) riding the tire is at the end of the rope. a) What was the ...

*December 2, 2016*

**Math**

Here's a pattern: 2, 4, 8, 16, 32. What's the nth term?

*December 2, 2016*

**Math**

Here is a number pattern: 1/2, 1/4, 1/6, 1/8, 1/10. Write an expression for the nth term

*December 2, 2016*

**FINANICIAL**

How much should be invested now at 7.55% compounded annually to have $46,000 in 12 years?

*December 2, 2016*

**Calculus**

Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified axis. y=6x^2, x=1, y=0, about the x-axis

*December 2, 2016*

**Calculus**

The region in the first quadrant bounded by y=6x^2 , 2x+y=8, and the y-axis is rotated about the line x=-1. The volume of the resulting solid is:

*December 2, 2016*

**Calculus - Integrals**

The region bounded by y=x^2, x=y^2 is rotated about the line y=-3. The volume of the resulting solid is:

*December 2, 2016*

**Calculus**

Find the volume of the solid obtained by rotating the region enclosed by the graphs of y=18-x, y=3x-6 and x=0 about the y-axis V=

*December 2, 2016*

**Calculus**

The region R is in the first quadrant and bounded by the x-axis, the y axis, and y= 3+2x-x^2. Find the volume of the solid that results when R is revolving about y+1= 0

*December 2, 2016*

**Finite Math**

Wendy wants $15,000 saved in 6 years to make a down payment on a house. How much money should she invest now at 4.65% compounded annually in order to meet her goal?

*December 2, 2016*

**Calculus**

The semicircular region bounded by the curve x=sqrt{9-y^2} and the y-axis is revolved about the line x=-3. The integral that represents its volume is V= âˆ« [a^b] f(y) dy What is f(y)? I've gotten f(y) to: (1+(sqrt(9-y^2)))^2-9 But it's not being ...

*December 2, 2016*

**Calculus - Integrals**

Find the volume of the solid of revolution obtained by revolving region bounded by the parabolas 2y=x^2 and y^2=4x about the x-axis

*December 2, 2016*

**American Government HELP**

Recall the scenario for this lesson’s discussion: You are the CEO of a powerful and politically connected corporation in your area. You have lunch once a month at your club with other business leaders of influential conglomerates to see where your interests might ...

*December 2, 2016*

**Health**

Noo it's d I took the quiz just now it is the last one

*December 2, 2016*

**Health**

Noo it's d I took the quiz just now

*December 2, 2016*

**Health**

Is it really a

*December 2, 2016*

**Science**

A lead calorimeter with mass of 150g contains 200g of water. The calorimeter and water are in thermal equilibrium at a specific temperature. Two metallic blocks are placed into the water. One is a 50.0g piece of aluminum heated at 90 degrees celcius. The other has a mass of ...

*December 2, 2016*

**MATH**

Taylor surveys students in one grade level who own at least one pet. She finds that 50% of the students surveyed own 2 pets, 3 students own 3 pets each, and 2 students own 4 pets each. Eight of the students in the grade own 1 pet. Considering the number of pets as the random ...

*December 2, 2016*

**Surface areas and volumes**

The inner diameter of a circular well is 3.5m .It is 10m deep (a) find the inner curved surface area (b)the cost of plastering the curved surface at the rate of 40/-per m^2

*December 2, 2016*

**Educational technology and online learning**

A B A <3

*December 2, 2016*

**Math**

Given that 9554÷562 = 17 how can you find the quotient 95,540÷562

*December 1, 2016*

**math**

Rodney has four books.She shares it with her two friends for one book each.They give her 14 books back and she spends it with her other 7 friends. How many books did they each get back?

*December 1, 2016*

**math**

How much of the earthâ€™s surface area would a man see if he were raised to the height of a diameter above it?

*December 1, 2016*

**Physics**

A 1.5 kilowatt electric motor on a water well pumps water from 10 meters below the surface. The density of the water is 1 kilogram per liter. How many liters of water does the motor pump in one hour?

*December 1, 2016*

**Physics**

How long would it take a 1.5 x 10^5 kilogram airplane with engines that produce 100 megawatts of power to reach a speed of 250 m/s at an altitude of 12 kilometers is air resistance were negligible? If it actually takes 900 seconds, what is the power? Given this power what is ...

*December 1, 2016*

**Physics**

One of their side jobs is a safe delivery and installation. A pulley system is used to lift the safe 2 meters above the ground. But the rope snaps! To avoid cracking from any drops, a large, stiff spring is placed below the safe while it's lifted. If the 1200 kilograms ...

*December 1, 2016*

**Physics**

On a hot summer day, you've got nothing better to do than play with ice cubes. You are currently sliding a 75 gram Ice Cube up and down a basically frictionless slope. At the bottom of the slope, which is inclined at 30 degrees relative to the horizontal, Is a spring with ...

*December 1, 2016*

**Physics**

You find yourself driving 35 kilometers an hour when you take your foot off the accelerator and descend 18 meters into the valley. Just as you reach the bottom, you see a policeman hiding between a speed limit sign that reads 70 kilometers per hour. Will he issue you a ...

*December 1, 2016*

**Physics**

After school you have been working on your slingshotmanship. Interested in the physics of the slingshot, you take data that compares the force of the extended slingshot versus the displacement from equilibrium. You think this graph is very similar to that of a spring so you ...

*December 1, 2016*

**Physics**

The modern boxing glove was introduced in 1743. Before then, gloves weren’t used. Let's assume that the average boxer's arm has a mass of 7 kilograms and reaches 10 m/s before hitting an opponent's face. If upon Collision the face was compressed about three ...

*December 1, 2016*

**chemistry chem check**

oooh. thank you. :-)

*December 1, 2016*

**chemistry chem check**

an ideal mixture contains 0.4 mol of nonvolatile solute and 0.8 mol of volatile solvent. the resulting vapor pressure was 60 mmHg at 300K. What vapor pressure should be reported at 300 K for pure solvent? A) 48 mmHg B) 60 mmHg C) 75 mmHg D) 90 mmHg **Would it be B) 60 mmHg ...

*December 1, 2016*

**Finite Math**

Kane Manufacturing has a division that produces two models of hibachis, model A and model B. To produce each model-A hibachi requires 3 lb of cast iron and 6 min of labor. To produce each model-B hibachi requires 4 lb of cast iron and 3 min of labor. The profit for each model-...

*December 1, 2016*

**english**

Parenthetical expression includes information that may be helpful but is not essential to the meaning of a sentence. They are de-emphasize by

*December 1, 2016*

**algebra 2**

The given series has six terms. What is the sum of the terms of the series? 10 + 25 + 40 + . . . + 85

*December 1, 2016*

**English Help ASAP**

don't worry about mr smartass anyone who looks for help.

*December 1, 2016*

**Math**

I am less than 100 and greater than 90. If you add the digits, the sum is 17. What number am I?

*December 1, 2016*

**math**

Which department has the largest difference between the highest and lowest paid employee?

*December 1, 2016*

**Henry 's weekly wage is €450. If Henry spends €90**

Henry's weekly wage is €450 . If Henry spends €90 on rent. What fraction of his wages does he spend on rent?

*December 1, 2016*

**spainsh**

adonde(va\vamos)Sandra

*December 1, 2016*

**Physics**

Are you sure you're not in an online school and that you are at a physical school?

*December 1, 2016*

**Physics**

Are you a student doing online school?

*December 1, 2016*

**Math**

Ryan left. Gabby left 3 hrs later, she drove 42mph faste. In 2 hrs she caught up. What was Ryan speed

*December 1, 2016*

**Herzing**

Sue can paint 1/4th of the wall in an hour and Joe can paint it in 1/6th of an hour.

*December 1, 2016*

**calculus**

Let g be a function that is defined for all x, x ? 2, such that g(3) = 4 and the derivative of g is g?(x)=(x^2–16)/(x?2), with x ? 2. Find all values of x where the graph of g has a critical value. For each critical value, state whether the graph of g has a local maximum...

*December 1, 2016*

**Chemistry 30**

How to find Oxidation Numbers of any component

*December 1, 2016*

**spanish 1a**

Choose the phrase that best complete the sentence _________ tenga los libros de biología a. yo creo que b. yo sé que c. Dudo que d. Have que

*December 1, 2016*

**Algebra**

The length of a rectangle is 2 ft less than three times the width. The area is 60 ft SQUARED. Find the length of the rectangle

*November 30, 2016*

**Calculus**

Find all values of c that satisfy the Mean Value Theorem for f(x) = x^3 + 1 on [2, 4].

*November 30, 2016*

**Algebra 1**

3x + y = -11 6x - 2y = -2

*November 30, 2016*

**Physics**

the theta should be 3.0 not 6.0 degree since it said on either side

*November 30, 2016*

**Math**

I can not answer this.

*November 30, 2016*

**computer programming**

Write a c++ code to vertically mirror an image.

*November 30, 2016*

**physics**

the speed of the train increased from 15 mi/hr to 25 mi/hr in distance of 500 ft. calculate the average acceleration in ft/s^2

*November 30, 2016*

**math**

1/2 of a class play soccer, 1/4 of the team are girls, what fraction represents how many girls on the team

*November 30, 2016*

**Physics**

Gas is confined in a tank at a pressure of 11.0 atm and a temperature of 25.0 degrees C. If two-thirds of the gas is withdrawn and the temperature is raised to 75.0 degrees C, what is the new pressure of the gas remaining in the tank? Please help!

*November 30, 2016*

**Physics**

A container is filled to a depth of 20cm with water. on top of the water floats a 30.0 cm thick layer of oil with specific gravity of 0.700, what is the absolute pressure at the bottom? Please help!

*November 30, 2016*

**English**

I'm sorry, I meant D

*November 30, 2016*

**English**

Which of the following is a true statement about an MLA Works Cited page? A. The Works Cited page requires no special formatting. B. The Works Cited page should immediately follow the conclusion and be on the same page. C. The Works Cited page should contain all information ...

*November 30, 2016*

**Algebra**

Suppose a parabola has an axis of symmetry at x = -2, a minimum height at -6, and passes through the point (0, 10). Write the equation of the parabola in vertex form.

*November 30, 2016*

**Algebra**

The equation h= -16t^2 + 32t + 9 gives the height of a ball, h, in feet above the ground,at t seconds after the ball is thrown upward.How many seconds after the ball is thrown will it reach its maximum height? What is its maximum height?

*November 30, 2016*

**precalculus**

When using Gaussian elimination to solve a system of linear equations, explain how you can recognize that the system has no solution.

*November 30, 2016*

**precalculus**

When using Gaussian elimination to solve a system of linear equations, explain how you can recognize that the system has no solution. Give an example that illustrates your answer.

*November 30, 2016*

**Language Arts**

Read the following lines from Sunjata. God is with the just. Everybody does what he wants, But God makes the final decision. The chick destined to be a rooster will eventually crow, No matter what is laid in its path. It will overcome. Which would BEST describes the tone ...

*November 30, 2016*

**Math**

One half of a number plus three is eighteen. Find the number

*November 30, 2016*

**English**

Prewriting can be helpful when trying to narrow a topic because it A. can reveal an interesting angle that may become your thesis. B. can usually be submitted as the final essay. C. helps you eliminate ideas that would support your thesis. D. raises a lot of issues related to ...

*November 30, 2016*

**e**

Find the area of a parallelogram with sides of length 6 and 8, and with an interior angle with measure $45^\circ$.

*November 30, 2016*

**Math**

Thank you for your help.

*November 30, 2016*

**Math**

1. Suppose y varies directly with x and, y=15 and x=5. Write a direct variation equation that relates x and y. What is the value of y when x=9? I need a little help on how to figure out how to write this out. Any help will be appreciated. Thank you

*November 30, 2016*

**world geography**

The results of the Cold War included all of the following except_

*November 30, 2016*

**precalculus**

Can you check my answer? If it is wrong can you please explain why and give the correct answer? Use Gaussian elimination to write the system of equations given below in row-echelon form. 2x+4y+z=-4 2x-4y+6z=13 4x-2y+z=6 answer:2x+4y+z=-4 8y-5z=-17 z=1

*November 30, 2016*

**pre calculus**

can you check this question? An object moving vertically is at the given heights at the specified times. Find the position equation s = at^2 + v0t + s0 for the object given the following conditions. •At t = 1 seconds, s = 48 feet •At t = 2 seconds, s = 64 feet •...

*November 30, 2016*

**math**

Find the cost of 5 banana if the rate of banana is rupee 15 a dozen

*November 30, 2016*

**Calculus**

Consider the function f(x) = {0, x = 0 and 1 - x, 0 <= x <= 1}. Which of the following statements is false? a. f is differentiable on (0, 1). b. f(0) = f(1) c. f is continuous on [0,1] d. The derivative of f is never equal to zero on the interval (0,1). B and D are true...

*November 30, 2016*

**English**

I got it...sent it in all ready.It is C....We all ready know God sees all and knows all, so that is not what is being reveled. Kugler regrets not finding the money is being reveled. Thanks for your help. :)

*November 30, 2016*

**English**

If you had read The Last Judgement could you please help me? God...."The fifth and sixth people were an old married couple;he finished them off with an axe and found practically no money, although they had more than twent thousand hidden away." Kugler jumped up: ...

*November 30, 2016*

**Math**

Find all solutions of the equation cot(theta)+1=0 through the interval [0,2pie).

*November 30, 2016*

**precalculus**

please check my answers 1.Use Gaussian elimination to write the system of equations given below in row-echelon form. 2x+4y+z=-4 2x-4y+6z=13 4x-2y+z=6 answer:2x+4y+z=-4 8y-5z=-17 z=1 2.Find the solution to the system of equations given below. x+y+z=2 -x+3y+2z=8 4x+y=4 answer: 0...

*November 30, 2016*

**Calculus**

Which of the following functions does not satisfy the conditions of the Mean Value Theorem on the interval [-1, 1]? a. 5th root of x b. 2x arccosx c. x/(x - 3) d. sqrt(x + 1)

*November 30, 2016*

**Chemistry 1**

Which shows equilibrium between solute and solvent? I'm stumped. a. 2 M CaCl2 b. 1 g Na2CO3 & 100 mL H2O c. 2 mL methanol & 4 mL hexane d. 1 mL H2O & 3 mL ethanol

*November 30, 2016*

**Chemistry**

A 26.3 gram sample of solid potassium chlorate decomposed and produced 9.45 grams of oxygen gas. What is the percent yield of oxygen?

*November 30, 2016*

**pre calculus**

Use Gaussian elimination to write the system of equations given below in row-echelon form. 2x+4y+z=-4 2x-4y+6z=13 4x-2y+z=6

*November 30, 2016*

**precalculus**

Write the form of the partial fraction decomposition of the rational expression. 1/9x^2-4

*November 30, 2016*

**michelle**

An object moving vertically is at the given heights at the specified times. Find the position equation s = at2 + v0t + s0 for the object given the following conditions. • At t = 1 seconds, s = 48 feet • At t = 2 seconds, s = 64 feet • At t = 3 seconds, s = 48 feet

*November 30, 2016*

**consumers math**

Sam Sounds received a $290 discount loan to purchase a stereo. The loan was offered at 16% for 90 days. Find the interest in dollars and the proceeds for the following problem.

*November 30, 2016*

**Math**

I am an odd number I am less than 100 The sum of my digits is 12 What am I

*November 30, 2016*

**math**

Town P is on bearing 315 degree from town Q. While town R is south of town P and west of town Q. If town R is 60km away from Q, how fara is R from P?

*November 30, 2016*

**precalculus**

write the equation of the parabola y=ax^2+bx+c that passes through the points(0,3), (1,4), and (2,3)

*November 29, 2016*

**precalculus**

write the system of equations in row-echelon form 2x+4y+z=-4 2x-4y+6z=13 4x-2y+z=6

*November 29, 2016*

**precalculus**

how do you determine when a system of equations is written in row-echelon form?

*November 29, 2016*

**precalculus**

write the form of the partial fraction decomposition of the rational expresion. (x^2-x+2)/x(x-1)^2

*November 29, 2016*