Wednesday

October 14, 2015
Total # Posts: 996

**chemistry**

Write the net ionic equation for the following molecular equation. HNO3 is a strong electrolyte. NaNO2(aq) + HNO3(aq)--> NaNO3(aq) + HNO2(aq) HNO2 is a weak electrolyte.
*September 27, 2015*

**Math**

Salon an was told the written paper on his science experiment should express measurements in liters. Which shows how to calculate the number of liters he used if he used 5 cups of water
*September 24, 2015*

**Biology**

Which of the following depends on bacteria?
*September 9, 2015*

**vocabulary**

the couple ordered for hors d'oeuvres at the wedding
*July 11, 2015*

**stats**

The mean tax-return preparation fee H&R Block charged retail customers last year was $183 (The Wall Street Journal, March 7, 2012). Use this price as the population mean and assume the population standard deviation of preparation fees is $50. Round your answers to four decimal...
*June 26, 2015*

**stats**

Three firms carry inventories that differ in size. Firm A's inventory contains 2000 items, firm B's inventory contains 5000 items, and firm C's inventory contains 10,000 items. The population standard deviation for the cost of the items in each firm's inventory...
*June 26, 2015*

**algebra**

From 2009 to 2014 the percent of students placing into Math 101 has increased from 13% to 25%. Meanwhile, the percent of students placing into Math 222 has dropped from 25% to 7% If both placements change at a linear rate, what will the percentage be when the percent of people...
*June 26, 2015*

**algebra**

A 24 question mathematics exam is worth 100 points. There are fill-in-the-blank questions worth 2 points each, multiple choice questions worth 6 points each, and long answer questions worth 5 points each. The number of fill-in-the-blank questions plus the number of multiple ...
*June 26, 2015*

**Algebra**

Walking Speed The avg. walking speed R of a person living in a city of population P in thousands is modeled by the function R(P)=0.37 times ln P + 0.05. where R is in feet per second. The populatin of Boston is 532,000, find the average walking speed of people living in boston.
*June 23, 2015*

**math**

convert to an exponential equation 3 = log(2, 8)
*June 23, 2015*

**ALGEBRA**

A BOATMAN ROWS TO A PLACE 48KM DISTANT AND BACK IN 14 HOURS; HE FINDS HE CAN ROW 4KM WITH THE STREAM IN THE SAME TIME AS 3KM AGAINST THE STREAM. FIND THE RATE OF THE STREAM?
*June 20, 2015*

**ALGEBRA**

a policeman is pursuing a snatcher who is ahead by 72 of his own leaps. the snatcher takes 6 leaps while the cop takes 5 leaps, but 4 leaps of the snatcher are as long as 3 leaps of the cop. how many leaps will the cop make before he catches the snatcher?
*June 20, 2015*

**ALGEBRA**

i have homeworks that in algebra, and those question i post are the questions i can't really solve
*June 20, 2015*

**ALGEBRA**

please help me
*June 20, 2015*

**ALGEBRA**

a policeman is pursuing a snatcher who is ahead by 72 of his own leaps. the snatcher takes 6 leaps while the cop takes 5 leaps, but 4 leaps of the snatcher are as long as 3 leaps of the cop. how many leaps will the cop make before he catches the snatcher?
*June 20, 2015*

**Alpha **

mr brown borrowed $5,340 from a bank at 10% aunnum simplr interest for 9 years. the sum of the money paid in interest to the bank and the total amount of money repaid to the bank
*June 18, 2015*

**Algebra**

a 2-liter bottle of Pepsi costs $2.19. A six pack of 12 oz cans costs $2.99, which is the better value and what is the total cost per ml? there are 29.6 ml in a fluid ounce.
*June 3, 2015*

**Algebra**

You drive up to Canada and notice that gas costs $1.31 per liter. The Canadian dollar is worth U.S. $1.02. How much will it cost you in american dollars to fill up your 12 gallon tank? What id the price per gallon up in Canada in American dollars?
*June 3, 2015*

**Algebra**

the space shuttle does one full orbit every 90 minutes and the earth is 25,000 miles around. What is the apparent speed of the space shuttle?
*June 3, 2015*

**Physics **

A pendulum swings back and forth up to a maximum height of 1.52 m. Neglecting friction, what is the speed of the pendulum at the lowest position. a) 2.7 m/s b) 3.9 m/s c) 5.5 m/s d) 30. m/s I thought the answer would be 0 m/s because it wouldn't move at the lowest position...
*May 11, 2015*

**Science**

How much force is exerted to lift 750 kg of water in the well against the force of gravity? How much work is done to lift this water .05m? How does this compart to hte work done byt he man in teh treadmill?
*April 25, 2015*

**Prealgebra**

Find the surface area of the prism. Round to the nearest tenth if necessary. The three sides are all 8.1 inches, the area of the base is 28.4 inches^2, and 12 inches is the length. It's a,b,c, or d. A. 348.4 in^2 B. 320 in^2 C. 291.6 in^2 D. 251.2 in^2
*April 24, 2015*

**algebra 2**

Three hundred and fifty-eight tickets to the school basketball game were sold. Student tickets were $1.50 and non-student tickets were 3.25. The school made $752.25. How many student tickets were sold?
*April 22, 2015*

**Algebra 2**

A chemist has a bottle of 1% acid solution and a bottle of 5% acid solution. She wants to mix the two to get 100 mL of a 4% acid solution. How much of each should she use?
*April 22, 2015*

**Statistics **

A sample of 53 night-school students' ages is obtained in order to estimate the mean age of night-school students. = 25.7 years. The population variance is 12. (a) Give a point estimate for mu. (b) Find the 95% confidence interval for mu (lower and upper limit). (c) Find ...
*April 2, 2015*

**Statistics **

By measuring the amount of time it takes a component of a product to move from one workstation to the next, an engineer has estimated that the standard deviation is 6 seconds. (a) How many measurements should be made to be 90% certain that the maximum error of estimation will...
*April 2, 2015*

**Statistics**

How large a sample should be taken if the population mean is to be estimated with 90% confidence to within $75? The population has a standard deviation of $892. So far I have n= (.2)(5)^2, but I don't think that's right....
*April 2, 2015*

**Latin**

anyways thank You for your help.....
*April 1, 2015*

**Latin**

well your not being very nice with the exclamation marks._.
*April 1, 2015*

**Latin**

well it would be more helpful -_- are you a tutor?
*April 1, 2015*

**Latin**

well its not my fault it doesn't let me put the website!
*April 1, 2015*

**Latin**

Day 1- 12 labors of Heracles greekmythology test prep
*April 1, 2015*

**Latin**

Ms. Sue
*April 1, 2015*

**Latin**

its a website but it doesn't let me put it
*April 1, 2015*

**Latin**

1. the second paragraph begins with the sentence " Offsetting his strength was a noticeable lack of intelligence or wisdom ". Use evidence from the text to support this claim. I NEED HELP
*April 1, 2015*

**chemistry **

The enthalpy of formation of MX is ΔHf° = –493 kJ/mol. The enthalpy of sublimation of M is ΔHsub = 143 kJ/mol. The ionization energy of M is IE = 437 kJ/mol. The electron affinity of X is ΔHEA = –317 kJ/mol. (Refer to the hint). The bond energy of ...
*March 16, 2015*

**chemistry**

OK thank you! I'm gonna ace this test!:)
*March 8, 2015*

**chemistry**

Yes I do know them but I don't get the parts with the parentheses. What do they mean?
*March 8, 2015*

**chemistry**

Write and balance each of the following equations, and then identify each by type. a) copper+chlorine-->copper(ll)chloride b) calcium chlorate--->calcium chloride+oxygen c)lithium+water--->lithium hydroxide+hydrogen d)lead(ll)carbonate--->lead(ll)oxide+carbon ...
*March 8, 2015*

**chemistry**

What do the parentheses mean like for example in lead(ll)oxide, though?
*March 8, 2015*

**chemistry**

Write and balance each of the following equations, and then identify each by type. a) copper+chlorine-->copper(ll)chloride b) calcium chlorate--->calcium chloride+oxygen c)lithium+water--->lithium hydroxide+hydrogen d)lead(ll)carbonate--->lead(ll)oxide+carbon ...
*March 8, 2015*

**Chemistry**

In de Broglie's equation w=wavelength w=h/mv how do i rearrange to solve for mass
*March 8, 2015*

**ELA**

ok thank you
*March 1, 2015*

**ELA**

in the article " Letter From Jackie Robinson on Civil Rights " for short response 1 I cant find what African americans want to recive and the details that support it. and for short response 2 I cant find how president Eisenhower unknowingly crush the spirit of ...
*March 1, 2015*

**algebra**

6(5y-4) 30y-24 -3+2(6z-3+4)
*February 24, 2015*

**science**

What are the transporters of protein in plants?
*February 18, 2015*

**physics**

A snowmobile is originally at the point with position vector 26.1 m at 95.0° counterclockwise from the x axis, moving with velocity 4.25 m/s at 40.0°. It moves with constant acceleration 1.73 m/s2 at 200°. After 5.00 s have elapsed, find the velocity vector, and ...
*February 4, 2015*

**Trigonometry**

point A and B are 100m apart and are of the same as the foot of a building. the angle of elevation of the top of the building from point A an B are 21 degrees and 32 degree respectively. how far is A from the building
*February 4, 2015*

**calculus**

Hello! Just needed help with understanding this specific question. We never really wet over Euler's method so I'm not sure how to go about it. "Use Euler's method in order to solve the initial value problem below. dy/dx = x-3 and y=4 when x=1 Use Euler's ...
*February 3, 2015*

**History**

1)C 2)D
*February 3, 2015*

**History**

In which Sumerian city was the most famous ziggurat located? A. Uruk B. Kish C. Lagash D. Ur
*February 3, 2015*

**Chemistry**

Assuming equal concentrations and complete dissociation, rank these aqueous solutions by their freezing points. CoCl3 K2CO3 KNO3
*January 29, 2015*

**calculus**

I needed help with this graphing calculator assignment; my sister took my calculator so I don't really have anything to work with, unfortunately. The graphing calculators online are really confusing and seem to require payment to work - so i'm pretty desperate. just ...
*January 20, 2015*

**economics**

if you could verify/falsify my answers on these multiple choice questions and possible give me insight on possible correct answers, that would be great. thanks! 1. Which is an acceptable market method of regulating negative externalities? A. Legal action against the source ...
*January 6, 2015*

**Geometry**

Original Statement "If it's a garage sale, then it's a Sunday." Statement 1 "If it's a Sunday, then it's a garage sale." Statement 2 "If it's not a Sunday, then it's not a garage sale." Statement 3 "If it's not a ...
*November 19, 2014*

**Human Geography**

Discuss the origin, diffusion, and impact on the cultural landscape for one of the following: A) folk housing styles in the United States. B) Buddhism in Asia. C) English in South Asia. Anyway I can get help with this? I have an FRQ due thursday and need help answering these.
*November 18, 2014*

**chemistry**

how many moles of no2 remain when 2.5 moles of n205 completely react
*November 3, 2014*

**English **

Read the following passage and identify at least 3 elements of figurative language; explain how each element brings out the theme of the passage. "The Wrong Place" by Susan Michalski Lana woke up, curled in a corner of the seat at the back of the train. She lifted ...
*November 2, 2014*

**Chemistry**

In a constant-pressure calorimetry experiment, a reaction gives off 20.8 kJ of heat. The calorimeter contains 150 g of water, initially at 21.4 degrees Celsius. What is the final temperature of the water? The heat capacity of the calorimeter is negligibly small.
*October 30, 2014*

**AP Chem**

NH3 + CO2 + H2O are introduced into an empty 1.00L vessel at 115 degrees. The initial partial pressure of at .500 atm. Calculate the number of moles of of solid (NH4)2CO3 that is present when equilibrium is established?
*October 28, 2014*

**AP Chem**

(NH4)2CO3 <-> 2NH3 + CO2 + H2O solid (NH4)2CO3 is placed in an evacuated container at 115C. When equilibrium is reached Kp = 1.93x10^-3. Extra NH3 gas is added, when equilibrium is reestablished, the partial pressure of NH3 is four times the partial pressure of H20. What...
*October 28, 2014*

**AP Chem**

solid (NH4)2CO3 is placed in an evacuated container at 115C. When equilibrium is reached the total pressure inside the vessel is 0.473 atm. Some solid remain in the vessel at equilibrium. Calculate Kp.
*October 28, 2014*

**chemistry**

1. A gas cylinder contains 0.722 mL of hydrogen gas at a pressure of 10.6 atm. If the gas is used to fill a balloon at a pressure of 0.960 atm, what is the volume of the filled balloon?
*October 28, 2014*

**Math**

A sixth grader weighs 90 pounds which is 120% of what he weighed in 4 th grade. How much did he weigh in 4th grade? 90x100=9000/120= 75 So he weighed 75lbs is this correct?
*October 5, 2014*

**Math**

In a parking lot 16% of the cars are blue. There are 4 blue cars in the lot. How many cars are not blue? 4x100=400\16= 25 then minus 4 blue cars to get the answer that 21 of the cars are not blue. I know the answer is 21 I'm just not sure if the work is correct?
*October 5, 2014*

**Calculus**

At what point does the normal to y=-5-1x+3x^2 at (1, -3 ) intersect the parabola a second time? Answer: Note: You should enter a cartesian coordinate. The normal line is perpendicular to the tangent line. If two lines are perpendicular their slopes are negative reciprocals -- ...
*September 24, 2014*

**Physics**

Obi-Wan lands his spacecraft on an unknown planet. Visibility is poor, so he isn't able to exactly determine on which planet he has landed. He finds someone on a local communications channel and asks for directions to Earth. "You are already on Earth," is the ...
*September 21, 2014*

**Physics **

The two masses shown in the figure are each initially 1.80 m above the ground, and the massless frictionless pulley is fixed 4.8 m above the ground. (mA = 1.5 kg and mB = 3.4 kg.) What maximum height does the lighter object reach after the system is released? [Hint: First ...
*September 21, 2014*

**math**

1. A grayhound's maximum speed is 39.35 mph how long does it take to run a quarter mile? 2. A human's maximum speed is 27.89 mph how long does it take to run a quarter mile? 3. A giant tortoise's maximum speed is 0.17 mph how long does it take to run a quarter mile...
*September 11, 2014*

**Science - Please Check My Answers**

on number one i got D i believe D is correct because i know C is wrong and everyone i have talked to has said D for the first one
*September 11, 2014*

**physics**

A rocket rises vertically, from rest, with an acceleration of 3.2 m/s2 until it runs out of fuel at an altitude of 730m . After this point, its acceleration is that of gravity, downward.whats the maximum altitude does the rocket reach?
*September 10, 2014*

**Biochemistry**

If you make up a solution of 100mL of 0.1 M Hepes in the basic form, what will be the pH? pKa = 7.55
*September 8, 2014*

**physics**

Student throws a baseball at a large gong 79 miles away and hears the sound of gong 2.63333 seconds later. The speed of sound in air is 330 miles per second. What was the average speed of baseball on its way to gong ?
*September 3, 2014*

**math**

John and Mary Billings own a condominium with an assessed value of $110,000. If the tax rate is 25 mills per $1.00 of assessed valuation, how much tax do they pay?
*June 24, 2014*

**Statistics**

Who is the king of late night TV? An Internet survey estimates that, when given a choice between David Letterman and Jay Leno, 52% of the population prefers to watch Jay Leno. Suppose that you randomly select three late night TV watchers and ask them which of the two talk show...
*May 22, 2014*

**economics**

Looking for examples on the four production factors within a service environment
*May 20, 2014*

**English**

Which of the following sentences is grammatically correct? a.Only Bill wanted to go to the lake. [Intended meaning: Bill wanted to go to the lake, but no one else did.] b.Bill only hinted that he would help us move. [Intended meaning: Bill hinted but did not, for example, ...
*May 10, 2014*

**Investments**

P4.3 Assuming you purchased a share of stock for $50 one year ago, sold it today for $60, and during the year received three dividend payments totaling $2.70, calculated the following: (a) Income (b) Capital Gain (or loss) (c) Total Return in Dollars (d) Total Return as a ...
*April 24, 2014*

**Chemistry **

What volume in liters of C3H7Cl is produced if 400.0g of C3H8 (propane) reacts with excess chlorine gas according to the equation C3H8+ Cl2 --> C3H7Cl+HCl
*April 15, 2014*

**Math**

Jason Printing has $85,000 to invest. They can invest in Wilder Revenue at 10% compounded semiannually or at Cheapskate Investments at 9.8% compounded monthly. a) Calculate the two APYs and compare them to determine your answer. Make sure to distinguish which APY belongs to ...
*April 13, 2014*

**algebra**

A baseball player hits a ball toward the outfield. The height h of the ball in feet is modeled by h(t) = -16t2 + 22t + 3, where t is the time in seconds. In addition, the function d(t) = 85t models the horizontal distance d traveled by the ball. If no one catches the ball, how...
*April 1, 2014*

**chemistry**

Hg2Cl2 = Hg + HgCl2 Please help me write the two half equations for this.
*March 31, 2014*

**Chemistry**

How many grams of C would be necessary to produce 790. grams of CaCO3 by the sequence of reactions shown below? Step 1: CaO + 3C → CaC2 + CO Step 2: CaC2 + N2 → CaCN2 + C Step 3: CaCN2 + 3H2O → CaCO3 + 2NH3
*March 27, 2014*

**Pre-Calc**

Eliminate the parameter x = abs(t-3) and y = t + 3...how do you undo the absolute value in order to get y=?
*March 2, 2014*

**Math**

Thank you
*February 26, 2014*

**algebra**

Find a slope of a snowboarding beginner hill that decreases 24 feet vertically for every 30 foot horizontal increase
*February 13, 2014*

**Science**

1. A 2. C 3. A 4. C 5. D
*February 3, 2014*

**math**

A model plane is 1/48 the size of the actual plane.if the model plane is 28 inches long how long it's the actual plane
*January 23, 2014*

**World History**

What was the anaconda Plan
*January 20, 2014*

**Writing**

Ok Hack. Thank you. Ill try it and c how it works out. :)
*January 16, 2014*

**Writing**

what is a good opening sentence to a short story? no matter what genre im writing? plz help me. from a girls point of view.
*January 16, 2014*

**Writing?!**

thanks. you guys helped me a lot. i got tons of ideas i hope the story will be fine.
*January 13, 2014*

**Writing?!**

does anyone know good realistic fiction topics and conflicts? i love writing but have a hard time with this genre because everything has to be able to occur in real life. :( im better at fake stuff. So plz plz help me!
*January 13, 2014*

**Novel Help**

Hey, realistic fiction can really occur. Im not a fan either i love to write but not realistic fiction! Maybe a girl ran away when he parents get into a car crash or she decided to commit suicide because she thinks she is alone. Hope it helps! :)
*January 13, 2014*

**history**

Can someone please help me? :) 1. Which of the following best describes the beliefs of Andrew Jackson? (1 point) States’ rights should be exercised over federal law. Federal funds should be kept in a national bank. The nation should have a strong federal government. Force...
*January 7, 2014*

**Science**

I don't understand, which ones did you get wrong?
*January 5, 2014*

**Math**

The distance traveled (in meters) by the Oregon slug can be modeled by the function f(t) = 0.9t, where t is the time in minutes. Find the distance traveled in 27.5 minutes.
*December 18, 2013*

**Physics**

A spring (k=302 N/m) placed vertically on a surface has a 548 g ball placed on top of it. How far must the spring be compressed in order for the ball to be traveling at a speed of 2.8 m/s when it is located 438 cm above its initial position?
*December 15, 2013*

**math**

I do not get how you got 3times as much when they aren't fully simplified.
*December 14, 2013*

**math**

A jar of peanut butter which is 3 inches in diameter and 4 inches high sells for $0.60. At the same rate, what would be the price for a jar that is 6 inches in diameter and 6 inches high?
*December 14, 2013*