Friday

October 28, 2016
Total # Posts: 397

**Chemistry **

Write equations for the dissociation of the following in water. Do not include states in your answer. 1) sodium acetate (NaC2H3O2) NaC2H3O2 ---> Na+ + (C2H3O2)- 2) copper(II) perchlorate Cu(ClO4)2 ---> Cu2+ + 2(ClO4)- Enter balanced ionic and net ionic equations for ...

*October 9, 2016*

**Derivative**

f(x)=x|x| Show that f'(0) exists. What is the value? I don't know how to work with the absolute solving for f'(x) with first principles

*October 3, 2016*

**math**

You travel upstream for 3 hours. The return trip takes only 2.5 hours because you are traveling 2 mph faster. Determone the boats speed up river.

*September 27, 2016*

**Math**

one of the acute angle of an isosceles triangle is 50 degree find the other two angles

*September 27, 2016*

**Functions**

Find a function with the following characteristics: D {xer|x=/=4} R {yer|y=/=9} f(x) increasing over entire domain Impossible?

*September 26, 2016*

**math**

33 pounds of bananas cost $163.50. how much would 18 pounds cost?

*August 9, 2016*

**Physics**

You use a rope to slowly pull a sled and its passenger 45 m up a 20∘ incline, exerting a 125-N force on the rope. How much work did Earth do on the sled for the trip in Part B? The answer for part is -5630 J I'm not sure what to do. I tried -5630 J * 9.8 then I tried...

*June 11, 2016*

**Physics **

A basketball player drops a 0.60-kg basketball vertically so that it is traveling at 6.0 m/s when it reaches the floor. The ball rebounds upward at a speed of 4.7 m/s. Determine the average net force that the floor exerts on the ball if the collision lasts 0.12 s. I calculated...

*June 9, 2016*

**Algebra**

Carmen is using the quadratic equation (x + 15)(x) = 100 where x represents the width of a picture frame. Which statement about the solutions x = 5 and x = –20 is true?

*June 2, 2016*

**Physics**

A person holding a lunch bag is moving upward in a hot air balloon at a constant speed of 6.1 m/s . When the balloon is 28 m above the ground, she accidentally releases the bag. What is the speed of the bag just before it reaches the ground? I got Vf^2= Vo^2 +2ad Vf^2= 0+ (2*9...

*May 23, 2016*

**Physics**

A person holding a lunch bag is moving upward in a hot air balloon at a constant speed of 6.1 m/s . When the balloon is 28 m above the ground, she accidentally releases the bag. What is the speed of the bag just before it reaches the ground? I got Vf^2= Vo^2 +2ad Vf^2= 0+ (2*9...

*May 23, 2016*

**Chemistry**

How many electrons does the bromine of BrF3 have in its outermost valence shell? Is it still seven like it would be when Br is by itself? Is it four because the three F would "take" one each to fill their octets? Or is it some other number?

*April 29, 2016*

**Math**

a circle is divided into 9 equal parts. That is the angle measure of two of those parts?

*March 24, 2016*

**Statistics**

Steve no that does not produce the correct answer

*March 12, 2016*

**Statistics**

a study shows that 16% of household appliances break during any given year. If a person has 4 household appliances, what is the probability that exactly 1 of them will break next year? I just need a formula and I can get it from there.

*March 12, 2016*

**Art**

I know it might be a little late but for anyone wanting to know the answer it's B: printing plate.

*February 26, 2016*

**College A**

2,900 to grow to $7,000 if the annual rate is 13.5% and interest is compounded monthly?

*February 25, 2016*

**Accounting**

A music store sells a CD with a wholesale price of $6 for $10.50 and one with a wholesale price of $14.00 for $20.50. If the markup policy for the store is assumed to be linear, find a function r = m(w) that expresses the retail price r as a function of the wholesale price w.

*February 25, 2016*

**English **

How can I reword or connect the two parts of this sentence? The truth behind the controversy is more than the remembrance of soldiers during the American Civil War, but the enslavement to Caucasian slave owners and the many African American slaves whose lives were taken away ...

*February 22, 2016*

**Math**

No the answer is not C, the answer would be A.

*February 5, 2016*

**math**

A fertilizer covers 3 4 square foot in 1 6 hour.

*January 27, 2016*

**chemistry**

A 43.20 mL sample of 0.3260 M sodium hydroxide (NaOH) is required to react completely with 36.70 mL of a phosphoric acid (H3PO4) solution. What is the molarity of the phosphoric acid solution?

*January 23, 2016*

**Chemistry**

Will 100g of copper completely replace all the silver in 200g of silver nitrate

*January 8, 2016*

**History**

Its C

*January 7, 2016*

**math**

Convert 8km to 22 minutes.. how?

*January 3, 2016*

**Chemistry**

Pjujt

*November 21, 2015*

**grammar**

The subcutaneous tissues were copiously irrigated, and a few small bleeders were cauterized. copiously modifies which word?

*October 22, 2015*

**grammar**

The patient had definitely suffered a myocardial infarction. definitely modifies which word?

*October 22, 2015*

**physics**

A skier leaves the top of a ski ramp at an angle of 25 degrees with an initial velocity of 10 m/s. The ramp is 60 m high, neglecting air resistance determine: a. The time it takes the sk ier to reach the ground. b. How far away from the base does he land? c. How high above the...

*October 1, 2015*

**physics**

A ball is kicked with an initial velocity of 20.0 m/s at an angle of 35 degrees to the ground. If it is to pass over a wall 5.6 m high determine a. The minimum horizontal the wall can be placed from the ball’s launch point in meters. b. What would be the ball’s ...

*October 1, 2015*

**physics**

A skier leaves the top of a ski ramp at an angle of 25 degrees with an initial velocity of 10 m/s. The ramp is 60 m high, neglecting air resistance determine:

*October 1, 2015*

**algebra**

For f(x)= 3x^2 +5 and g(x)=7x-2, a. Verify: (show the steps for each side clearly.) g(x+2) not equal g(x) + g(2). I need help idk answer a.

*September 21, 2015*

**algebra**

I don't know answer a. and b. .... I need help please.....

*September 20, 2015*

**algebra **

A size 36 shoe in France is size 3.5 in England. A function that converts shoe sizes in France to those in England is g(x)=3x-94/4. A size 6 shoe in the United States is size 3.5 in England. A function the converts shoe sizes in England to those in the United States is f(x)= x...

*September 20, 2015*

**Math**

At a speed of 45 yards per minute, a 120 pound swimmer burns 600 calories per hour. Use two different methods to write a linear equation that models the number of calories burned per hour as a function of a swimmer's weight

*August 31, 2015*

**acct ii**

A company has $314,000 in credit sales. The company uses the allowance method to account for uncollectible accounts. The allowance for doubtful accounts now has a $1,890 debit balance. If the company estimates that $8,160 of accounts will be uncollectible based on an aging of ...

*August 21, 2015*

**Math**

Thanks I figured it out. The definition of x is the numbers since 1990.

*June 23, 2015*

**Math**

The number of prisoners measured in thousands can be described by the polynomial -2.06x^2+77.85x+750. According to the polynomial, by how much did the prison population increase from 2002 to 2007?

*June 23, 2015*

**algebra**

Alice puts money into two accounts, one with 2% annual interest and another with 3% annual interest. She invests 3 times as much in the higher yielding account as she does in the lower yielding account. If her total interest for the year is $27.50, how much did she invest in ...

*June 18, 2015*

**Chemistry**

A piece of copper 12 cm long, 8.5 cm wide, and .50 cm thick has a mass of 457 grams. What is its density? D = m/v D = 457 g / 12x8.5x.50 D = 457 / 51 = 8.96 g/cm^3 Is this correct?

*June 10, 2015*

**chem**

A sample of hydrogen with a volume of 800 mL exerts a pressure of 620 mm Hg at 5°C. Approximately what volume will it occupy at standard temperature and pressure? V2=800x620x273/760x278 =135,408,000/211,280 V2=640.9 mL Can someone tell me if I'm correct or not?

*May 19, 2015*

**polynominals**

The number of trout in America, since 1970, is given by the following: y = x^2 + 3x + 2, where x is the number of years and y is the number of trout in millions. What is the number of trout in the years 1975, 1980, and 1985?

*April 27, 2015*

**algrebra**

A scientist is working with 1.3m of gold wire. How long is the wire in millimeters? Be sure to include the correct unit in your answer.

*April 23, 2015*

**algebra**

I need some help with this math problem: Let n be the number of oil refineries at t years since 2005. A reasonable model of oil refineries is n= -2.23t + 210.53. What is the slope of this model? What does it mean in this situation?

*April 15, 2015*

**English**

3. Trainers can teach dolphins to jump through hoops. 6. We sung the song so many times we knew it by heart. Is it correct now?

*March 31, 2015*

**English**

Change the passive verbs to active verbs. Can you please tell me if these are correct or not? 1. The candles were lit by Father after we were called to dinner by him. Father lit the candles after he called us to dinner. 2. A beautiful sweater was received by Kokila from her ...

*March 31, 2015*

**algebra**

square root 2 (square root 10+8 square root2)

*March 12, 2015*

**Physics**

39- turn coil 3.20 cm 1.00 Ω B= 0.0100t + 0.0400t2 T= 5.40s lƩl =ΔφB/Δt = N (dB/dt)A =N[d/dt (0.0100t + 0.0400 t^2)A =39(0.0100 + 0.0800(5.40))[π(0.0320)^2] =0.05545 =5.55 x 10^-2 V =55.5 mV

*March 3, 2015*

**Chemistry**

A balloon filled with 1.35 atm of dimethyl ether gas and 5.25 atm of oxygen gas at 27 °C has an initial volume 2.00L They react according to the following reaction: C2H6O (g) + 3 O2 (g) -> 2 CO2 (g) + 3 H2O (g) The system is allowed to back cool down to 27 °C ...

*February 19, 2015*

**physics**

Paul lifts a sack weighing 245 newtons vertically from the ground and places it on a platform at a height of 0.7 meters. If he takes 10 seconds to do this task, what power has he expended during this time?

*February 18, 2015*

**statistics**

An automotive manufacturer has selected 10 car seats to study the Rockwell hardness of the seat recliner mechanism. A sample of 8 has an average of 44.795 and a standard deviation of 0.402. At 95% percent confidence level, what is the interval for the population mean?

*February 9, 2015*

**statistics**

A sample distribution (closely approximating a normal distribution) of a critical part dimension has an average of 11.85 inches and a sample standard deviation of 1.33 inches. The lower specification limit is 11.41 inches. The upper specification limit is 12.83 inches. What ...

*February 9, 2015*

**statistics**

A manufacturer of light bulbs has sampled 40 bulbs in order to determine the population mean life of the bulbs. The sample mean was 1,200 hours with a standard deviation of 100. The manufacturer would like to know, with 95% confidence, the interval values for the population mean

*February 9, 2015*

**College Math**

15

*December 21, 2014*

**BUSINESS MATH**

: The Crescent Corporation just paid a dividend of $2 per share and is expected to continue paying the same amount each year for the next 4 years. If you have a required rate of return of 13%,

*December 17, 2014*

**BUSINESS MATH**

: The Crescent Corporation just paid a dividend of $2 per share and is expected to continue paying the same amount each year for the next 4 years. If you have a required rate of return of 13%, plan to hold the stock for 4 years, and are confident that it will sell for $30 at ...

*December 8, 2014*

**BUSINESS MATH**

Moore Company is about to issue a bond with semiannual coupon payments, a coupon rate of 8%, and par value of $1,000. The yield-to-maturity for this bond is 10%.

*December 8, 2014*

**BUSINESS MATH**

Part B: The Crescent Corporation just paid a dividend of $2 per share and is expected to continue paying the same amount each year for the next 4 years. If you have a required rate of return of 13%, plan to hold the stock for 4 years, and are confident that it will sell for $...

*December 8, 2014*

**BUSINESS MATH**

The Crescent Corporation just paid a dividend of $2 per share and is expected to continue paying the same amount each year for the next 4 years. If you have a required rate of return of 13%, plan to hold the stock for 4 years, and are confident that it will sell for $30 at the...

*December 8, 2014*

**IT**

What enhanced security features does Microsoft Corporation offer/provide?

*December 4, 2014*

**Communications**

Why is it important that technology companies (Windows, Apple, etc.) make their products easily accessible for their consumers?

*December 3, 2014*

** physics**

a gun fires Aa bullet of mass 50g the bullet moving with a velocity of 100m/s strikes a sandbag get embedded after travelling 10cm calculate the resistance force exerted by the sand bag on the bulle

*August 24, 2014*

**statistics**

Kindergarten children have heights that are approximately distributed normal. A random sample of size 20 is taken and the mean x and the standard deviation s are calculated ( x = 40 inches and s = 3). a. Is there sufficient evidence to indicate that the mean of kindergarten ...

*August 3, 2014*

**Chemistry**

Consider the unbalanced redox reaction: Cr2 O7 2-(aq) + Cu(s) ----> Cr3+(aq) + Cu2+ Balance the equation in acidic solution and determine how much of a 0.850 M K2 Cr2 O7 solution is required to completely dissolve 5.25 g of Cu.

*July 22, 2014*

**Calculus **

(i) A 20m chain with a mass-density of 3kg/m (coiled on the ground). How much work is performed lifting the chain so that it is fully extended (and one end touches the ground)? (ii) How much work is performed to lift 1/4 of the chain?

*May 12, 2014*

**Chemistry **

Consider the following reaction: CaCO3(s)→CaO(s)+CO2(g). Estimate ΔG∘ for this reaction at each of the following temperatures. (Assume that ΔH∘ and ΔS∘ do not change too much within the given temperature range.) A) 310K and is it ...

*May 12, 2014*

**Physics**

oh 200 thanks

*May 11, 2014*

**Physics**

So what would the magnitude be then?

*May 11, 2014*

**Physics**

Bob is pulling a 30kg filing cabinet with a force of 200N , but the filing cabinet refuses to move. The coefficient of static friction between the filing cabinet and the floor is 0.80. What is the magnitude of the friction force on the filing cabinet? Express your answer to ...

*May 11, 2014*

**ALG**

1 r = 1 r1 + 1 r2 for r2

*April 4, 2014*

**physics**

A boy with a mass of 50 kg is hanging from a spring with a spring constant of 200 N/m. With what frequency does the boy bounce up and down?

*March 12, 2014*

**2 question**

Connections academy Edtech Unit 6 lesson 1 1. B 2. A 3. D

*February 17, 2014*

**Personal Dimensions of Education**

are

*February 16, 2014*

**SCIENCE --- CHECK MY WORK PLS**

4/4

*February 3, 2014*

**south carolina history**

Hi, did you every get the answer?

*February 2, 2014*

**physics**

480 N?

*January 29, 2014*

**physics**

The above equation is wrong

*January 10, 2014*

**SCIENCE? HELP!**

a i think

*December 16, 2013*

**psychology**

what might be some of the things that you could use as test items that would tap into this general form of intelligence that would not be overly affected by cultural matters? If not, why not?

*December 11, 2013*

**english**

the blank democratic movement slowly grew stronger as more people began to desire free elections. a:convened b:embarked c:incipient d:generated think its b

*December 2, 2013*

**Chemistry**

Hi, I'm a little stuck on this problem: Find the pH of the Hydrochloric acid solution when 5.0 mL of concentrated HCl, with a specific gravity of 1.18 and has 37% (w/w) purity is diluted to 2.0L

*November 11, 2013*

**Physics**

A spherical source radiates sound uniformly in all directions. At a distance of 12 m, the sound intensity level is 100 dB. At what distance from the source is the intensity level 40 dB? When I set it up as 100dB/40dB = r^2/(12m)^2, and got x = 18.97 meters, i was told this ...

*October 22, 2013*

**Physics**

A spherical source radiates sound uniformly in all directions. At a distance of 12 m, the sound intensity level is 100 dB. At what distance from the source is the intensity level 40 dB? When I set it up as 100dB/40dB = r^2/(12m)^2, and got x = 18.97 meters, i was told this ...

*October 22, 2013*

**Physics**

A spherical source radiates sound uniformly in all directions. At a distance of 12 m, the sound intensity level is 100 dB. At what distance from the source is the intensity level 40 dB? When I set it up as 100dB/40dB = r^2/(12m)^2, and got x = 18.97 meters, i was told this ...

*October 22, 2013*

**Help **

A result from being multiplied A. Product B. Quotient C. Multiplier D. Expression i say A but i got that wrong so im confused

*October 9, 2013*

**vocab**

i mark that and got that wrong i don't understand how that's wrong

*October 9, 2013*

**vocab**

A result from being multiplied A. Product B. Quotient C. Multiplier D. Expression a

*October 9, 2013*

**history**

2. William Lloyd Garrison’s The Liberator was known for appealing to its readers’ sense of (1 point) A. moral correctness. B. modern convenience. C. economic concern. D. social status. a

*October 6, 2013*

**Physics**

while john is traveling along an interstate highway, he notices a 160-mile marker as he passes through town. later john passes another mile marker, 115. a. what is the distance between town and john's current location? b.what is john's current location?

*September 2, 2013*

**Physics**

WHat is value of R please? cannot figure out.

*May 22, 2013*

**Science**

A 0.2 kg object is released from rest at point A on a track that is one-quarter of a circle with radius 1.6 m, as shown in the figure. It slides down and reaches point B with a speed of 4.8 m/s. Then it slides on a level surface a distance of 3 m until it comes to rest at ...

*May 15, 2013*

**Math**

How do you know when you should re write as a mixed number or simplify; for example. 1 1/2 x 23/9= 3/1 x 23/9= 69/18= what is the way to tell if I should simplify or re write as a mixed number?

*April 24, 2013*

**Physics**

A 20 mH inductor in series with a resistance of 55 ohms is connected to a source whose voltage is = 310 V cos 150πt, where t is in seconds. (a) Determine the maximum current in the circuit. (I solved this already, I=5.63A) (b) Determine the maximum and rms voltages across...

*April 17, 2013*

**Physics**

A 20 mH inductor in series with a resistance of 55 ohms is connected to a source whose voltage is = 310 V cos 150πt, where t is in seconds. (a) Determine the maximum current in the circuit. (I solved this already, I=5.63A) (b) Determine the maximum and rms voltages across...

*April 17, 2013*

**Physics**

A 20 mH inductor in series with a resistance of 55 ohms is connected to a source whose voltage is = 310 V cos 150πt, where t is in seconds. (a) Determine the maximum current in the circuit. (I solved this already, I=5.63A) (b) Determine the maximum and rms voltages across...

*April 17, 2013*

**algebra**

A 33-foot-long speaker wire is to be cut into three pieces. One piece is to be 11 feet long. Of the remaining pieces, one must be 2 feet less than 3 times the length of the other. Find the length of the shorter piece

*April 16, 2013*

**stats**

Use the given degree of confidence and sample data to construct a confidence interval for the population proportion p. 1) n = 128, x = 93; 90 percent

*April 15, 2013*

**stats**

Thirty random students took the final. If the sample mean was 86 and the standard deviation was 9.2 construct a 99 percent confidence interval for the mean score of all

*April 15, 2013*