Friday

October 31, 2014

October 31, 2014

Total # Posts: 230

**math**

Bianca has a total of 25 cent. She has some nickels and pennies. How many different combinations of nickels and pennies could Bianca have?
*October 27, 2014*

**math**

Ms. Hernandez has 17 tomato plants that she wants to plant in rows. She will put 2 plants in some rows and 1 plant in the others. How many different ways can she plant the tomato plants?
*October 27, 2014*

**Chemistry**

Is there a reaction between Sodium Acetate and Copper (II) Nitrate. If so, what is the balanced equation for it? Also, what type of reaction is it does it form a precipitate?
*October 18, 2014*

**Chemistry HELP**

Ba(OH)2 + 2 HCl → BaCl2 + 2 H2O The reactants are present in equimolar amounts, so there is no excess or limiting reactants. (0.0500 L) x (0.600 mol/L HCl) x (2 mol H2O / 2 mol HCl) = 0.0300 mol H2O (4.184 J/g·°C) x (50.0 g + 50.0 g) x (25.82 - 21.73)°C = ...
*October 18, 2014*

**Chemistry**

The synthesis of zinc iodide was performed using 1.8912g of zinc and 1.5965g of iodine. Determine the limiting reactant and calculate the theoretical yield of zinc iodide in grams.
*October 7, 2014*

**Chemistry**

Aluminum oxide is formed by reaction of excess oxygen with aluminum. 4 Al(s) + 3 O2(g) -> 2 Al2O3(s) Calculate the mass of aluminum required to form 18.2 kg of aluminum oxide if the reaction has a percent yield of 83.4%.
*October 2, 2014*

**Chemistry**

Silver chromate may be prepared by the following reaction. 2 AgNO3(aq) + K2CrO4(aq) Ag2CrO4(s) + 2 KNO3(aq) Calculate the mass of silver chromate produced when 0.623 L of 1.345 M silver nitrate is reacted with 245 mL of 1.89 M potassium chromate.
*October 2, 2014*

**Chemistry**

Thank you for such a quick response DrBob222.
*September 26, 2014*

**Chemistry**

An aqueous solution of barium nitrate has a density of 1.09 g/cm3. The solution is 18.7% barium nitrate by mass. How many nitrate ions are present in 87.6 dL of this solution?
*September 26, 2014*

**coor. algebra**

Okayy so my class is doing conversions annnd.I need help ALOT. 130 meters per second into miles per hour . If you answer can you show me how you got the answer and how to know of the answer is right?
*August 11, 2014*

**math**

find the sum of 3/6+4/10+3/30 and reduce to lowest term
*July 31, 2014*

**Physical Science**

Describe convection in a room heated by a radiator.
*March 8, 2014*

**physics**

A first capacitor is initially connected to potential source ?. The charged capacitor is then removed from the source and connected to a second initially uncharged capacitor. Determine the final potential across the first capacitor long after the switch is closed.
*February 28, 2014*

**Chemistry AP**

What are the concentrations of benzoic acid and sodium benzoate in a solution that is buffered with a pH of 4.55 and has a freezing point of -2.0 degrees Celsius? (assume complete dissociation and a density of 1.01g/mL for the solution.)
*February 5, 2014*

**US History**

Do the philosophies of laissez-faire and survival of the fittest explain why John D. Rockefeller succeeded in Cleveland, and was his success good for the oil industry and the American consumer? Any information would be greatly appreciated, please and thank you!
*January 9, 2014*

**math**

Ms. Hernandez has 17 tomato plants that she wants to plant in a rows. She will put 2 plants in some rows and 1 plant in the others. How many different ways can she plant the tomato plants?
*November 26, 2013*

**Physical Science**

1. Which equation correctly shows beta decay? (A) 210/82 Pb -> 209/81 Tl + 0/-1 e + y (B) 210/82 Pb -> 209/83 Bi + 0/-1 e + y (C) 210/82 Pb -> 210/83 Tl + 0/-1 e + y (D) 210/82 Pb -> 210/83 Bi + y (E) 210/82 Pb -> 210/83 Bi + 0/-1 e + y 2. The half-life if radon...
*November 18, 2013*

**math**

an average sized female spider and a large spider can lay a total of 2100 eggs at one time . The large spider lays 20 times the number of eggs as the average spider. How many eggs does the average spzied spider lay?
*November 14, 2013*

**Physical Science**

17. Why can't carbon-14 be used to determine the age of fossils that are several hundred thousand years old? Please and thank you!
*November 12, 2013*

**Algebra 1**

4. Two consultants were hired by a company. The total consultant fees were $18,500. If one consultant had earned $500 less, each consultant would have been paid the same. How much was each consultant paid? 6. Five cars in a race all finished within 8 seconds of each other. Car...
*October 28, 2013*

**Physical Science**

20. Why is ethanol added to gasoline? Can't find this answer in my book, and I've gone back and checked for it like three times. Please and thank you!
*October 25, 2013*

**US History**

Which of the following statements about the Platt Amendment is true? A - It guaranteed that Cuba would be independent by 1915. B - It prevented the United States from intervening in Cuban foreign affairs. C - It essentially made Cuba a U.S. protectorate. D - It opened up ...
*October 24, 2013*

**World History **

Even though Robespierre was not a defender of women's equality in France, how are his and Etta Pal d'Aelders's arguments similar? When might Sieyes claim that women would be eligible for the equal rights that Etta Palm d'Aelders states that they rightfully ...
*October 21, 2013*

**Physical Science**

5. What reactions occurs when a solution of hydrochloric acid, HCl, is mixed with a solution of calcium hydroxide, Ca(OH)2? (A) Cl + Ca(OH) --> HCa + Cl(OH)2 (B) HCl + Ca(OH)2 --> H(OH)2 + CaCl (C) 2HCl + Ca(OH)2 --> 2H2O + CaCl2 (D) 2HCl + Ca(OH)2 --> H2Ca + 2ClOH...
*October 16, 2013*

**chemistry**

Calculate the amount of heat required to completely sublime 76.0g of solid dry ice (CO2) at its sublimation temperature. The heat of sublimation for carbon dioxide is 32.3 kJ/mol.
*September 1, 2013*

**physics**

One end of a meter stick is pinned to a table, so the stick can rotate freely in a plane parallel to the tabletop. Two forces, both parallel to the tabletop, are applied to the stick in such a way that the net torque is zero. The first force has a magnitude of 2.00 N and is ...
*July 16, 2013*

**Science Help**

mass = 4.5 kg Compare and contrast the mass and weight of this bowling ball on Earth and the moon.
*May 21, 2013*

**Finance**

The most recent financial statements for Retro Machine, Inc., follow. Sales for 2010 are projected to grow by 20 percent. Interest expense will remain constant; the tax rate and the dividend payout rate will also remain constant. Costs, other expenses, current assets, fixed ...
*March 20, 2013*

**Math**

If someone is renting a truck that has a 40 gallon tank and it gets 10 miles per gallon and they are traveling 252 miles, what will they pay for gas for the trip?
*March 18, 2013*

**st joseph school**

when a traffic light turns green, a car accelerates at a constant rate, the decelerates in the same manner to stop at the next traffic light. The speed of the car, s, is given by the equation, s=-10 /t-8/ + 80 where t is time. Find the time , t, it takes for the car to reach ...
*March 17, 2013*

**Math**

24 m of fencing are available to enclose a play area. what would the maximum area be if the fencing only went on 3 sides because the wall is used as the 4th side. Please show you work
*February 22, 2013*

**Econ**

If the federal government enacts a tax on a monopoly, how would you expect the additional tax to affect the following: a. Profits of the monopoly b. Output produced by the monopoly c. Prices charged by the monopoly
*February 16, 2013*

**programming (using raptor)**

Create a program that determine the shipping cost for an order based on the following table: From $0.00 $20.00 $50.00 $75.00 To $19.99 $49.99 $79.99 $1000.00 Price $2.95 $3.95 $4.95 Free
*December 3, 2012*

**math**

what two simpler problems can you use to find 9x38
*November 14, 2012*

**Math**

four times one number minus a second is 11, and the sum of the numbers is 14. Find the numbers.
*October 29, 2012*

**Math**

1)one number is four more than a second number. Twice the second is three more than the first. Find the numbers. 2)four times one number minus a second is 11, and the sum of the numbers is 14. Find the numbers.
*October 27, 2012*

**AP Chemistry**

I still don't understand how to get the theroetical yield.
*September 19, 2012*

**AP Chemistry**

In the reaction below, 16 g of H2S with excess O2 produced 8 g of sulfur. ? H2S + ? O2 → ? S + ? H2O . What is the percent yield of sulfur? Answer in units of %
*September 19, 2012*

**AP Chemistry**

For the reaction ? ZnS + ? O2 →? ZnO+? SO2 , what is the maximum amount of ZnO which could be formed from 14.06 g of ZnS and 5.56 mol of O2? Answer in units of g
*September 19, 2012*

**AP Chemistry**

So that would also equal 34 grams right?
*September 19, 2012*

**AP Chemistry**

Sulfuric acid (H2SO4) is prepared commercially from elemental sulfur using the contact process. In a typical sequence of reactions, the sulfur is ﬁrst burned: S + O2 → SO2 , then it is converted to SO3 using a catalyst: 2 SO2 + O2 → 2 SO3 . The resulting SO3...
*September 19, 2012*

**AP Chemistry**

I converted my 524ml to liters so that became 524000. Then I did 3.16x1655.84. Then converted back to liters. But i just realized i skipped a step, but I don't understand where I get the numbers at for that.
*September 19, 2012*

**AP Chemistry**

I don't really understand how to set it up. I'm to figure out my moles for water but after that I'm stuck.
*September 19, 2012*

**math**

jane have 4 nickels, 6 pennies, 4 dimes, and 2 quarters. she picks a coin at random. what is the probability that she will pick a nickel or a dime/
*September 13, 2012*

**math**

how do you write one third the volume of the pool as an expression
*July 17, 2012*

**english**

Would Steven Spielberg be a good speaker for a school assembly? Write a letter convincing your principal that Steven Spielberg would or would not be a good speaker for an assembly at your school. Use information from the passage to support your argument.
*July 16, 2012*

**geometry**

the sum of the measures of two acute angles is 110 degree.the suplement of the smaller anngle is 15 times the complement of the larger angle.what are the measures of the two angle?
*July 14, 2012*

**geometry**

the sum of the measures of an obtuse angle and acute angle is 12 degrees.the complement of the acute angle and one-half the suplement of the obtuse angle is 75 degree.find the measures of the two angles.
*July 14, 2012*

**computers**

Sorry but the right thing to do is pay attention in class.
*May 22, 2012*

**art**

1. In Judith Leyster’s paintings she used contrast. What is contrast? 2.Looking at van Gogh’s painting “The Olive Tree”: What season of the year do you think the colors suggest? Question 3. One of Pablo Picasso’s styles was cubism. What does cubism ...
*May 16, 2012*

**math**

Jeff wants to start a lawn maintenance service to earn money for college. He wants to charge $25 for a small lawn and $35 for a large one. It takes him an average of 2 hours to mow and trim a small lawn and 3 hours to do a large one. He wants to make at least $250 a week but ...
*May 9, 2012*

**Math**

Brett wants to use 40 feet of twine to mark off a rectangular area in his yard for a garden. What are the length and width for a garden with the greatest area?
*May 3, 2012*

**english essays**

Need help to proofread essay...
*April 29, 2012*

**Geometry **

If the length of the sides of two similar triangles are in the ratio 3:4, what is the ratio of the lengths of a pair of corresponding altitudes? What is the ratio of their perimeter?
*April 28, 2012*

**english**

can some one help me
*April 5, 2012*

**english**

im just asking for help
*April 5, 2012*

**english**

its online ,not in a book
*April 5, 2012*

**english**

so then it would be the subject?
*April 5, 2012*

**english**

ms.sue??
*April 5, 2012*

**english**

so in the second question the gerund is playing? and its function is predicate nominative?
*April 5, 2012*

**english**

whats that ms.sue??
*April 5, 2012*

**english**

What is the gerund phrase and noun function of the gerund in these sentences: 1.Brett earns his income by repairing cars. 2.I enjoy playing the piano. 3.Her favorite pastime is entertaining friends. 4.She is successful in mimicking others' voices. 5.He must like studying ...
*April 5, 2012*

**POS2041**

Why are government policies on immigration so controversial?
*March 22, 2012*

**calculus**

I was doing calc hw and I am stuck on a part of a question. =(1/10)-(x/15sqrt(x^2-9)) I am supposed to put this equation equal to 0 and solve for x. The answer is 9/sqrt(5) but I don't understand how the answer comes out to be 9/sqrt(5). Please help. Thank you.
*February 25, 2012*

**chemistry**

In formula for where ferenheit and celsius converge (T = T x 9/5 +32); what is the logic that T x 9/5 = T + T = 4/5?
*January 24, 2012*

**geometry**

Gerrad is a painter. he is using a canvas that is in the shape of a regular hexagon. The perimeter of the canvas is 78 in. The perpendicular distance from a side to the center is 11 in. to the nearest inch. Based on these measurements, what is area of the canvas
*December 4, 2011*

**algebra**

find the average rate of change from (2,1) to (8,5) for f(x)=(4x^(2)-2x)/(6x)
*December 1, 2011*

**al gebr word problem MATH**

you go girl or boy
*October 26, 2011*

**math**

A store offers a 15% discount on all items in the store during a sale. All store employees get an additional 10% employee discount. In the equation below, C represents the cost of an item for an employee including tax, and x represents the original price of the item. C = 0....
*October 12, 2011*

**physics**

A rock accelerates 3m/s/s down a ramp. How long will it take for the rock to increase its speed from 2m/s to 17m/s down the ramp?
*October 6, 2011*

**Math**

1 1/2
*September 29, 2011*

**physics**

a plane stops from 250 mph in 25 seconds. Calculate the planes acceleration
*September 24, 2011*

**Algebra**

I need this answer in Scientific Notation please help 7.74x10^-4
*August 18, 2011*

**physics**

which one is angle will give the longest range ? 30 degrees ? 45 degrees ? 60 degrees ?
*July 12, 2011*

**calc2**

How do I find the continuous rate though?
*May 16, 2011*

**calc2**

At what constant, continuous annual rate should you deposit money into an account if you want to have $1,000,000 in 25 years? The account earns 5% interest, compounded continuously. Round to the nearest dollar.
*May 16, 2011*

**managerial eco**

A single price setting monopolist faces the demand : P = 4000-5Q, TC = 0 + 400Q. For the single price-setting monopolist, tell me profit maximizing quantity, price,total revenue, total cost, profit and consumer surplus.
*April 19, 2011*

**math**

On the fasted speedways, some drivers reach average speeds of 3 miles per minute. Write a formula that gives the number of miles M that such a driver would travel in x minutes. How far would this driver travel in 32 minutes?
*April 11, 2011*

**math **

k=1/2mv^2, for m V= h/e v- E/e, for e Please help.
*March 31, 2011*

**math**

solve: I=Prt, for P
*March 31, 2011*

**math**

Explain why the simultaneous equations y=1/2x+2 and 2y-x:4 have an infinite number of solutions. What is diffrent about these equations compared with the equations in the first question ( the equations were y=2x+3 and 5y-10x=5)? What is similar? ( include work to prove why and...
*February 24, 2011*

**math**

the first thing you do is divide 30000 with 100: 300 = 1% multiply it by seven to count the percentage 300x7 = 2100 multiply it by 4 to count the total via years 2100x4 = $8400 The answer is $8400 in total :)
*February 24, 2011*

**world history**

Renaissance contributed to the age of exploration by re-opening new trade routes in which increased the demand for foreign goods in europe. Sailor were willing to explore new lands not only to colonize but also for the wealth that awaited them. Also if they could find a direct...
*February 21, 2011*

**Precalc**

What is the degree of the following polynomial equation? (x+9)(x-5)(x+2)=0 1. 2 2. 3 3. 4 4. 5
*February 20, 2011*

**Math**

Draw two line segments connecting angles of the hexagon to make four quadrilaterals...
*February 17, 2011*

**Math**

A waffle cone has a width of 7.6 cm and height of 15.2cm and a chocolate coating that is 2mm thick. What is the volume of the chocolate coating? How many of these cones if they were filled up to the brim would be needed for 400 gallons of ice cream given 2 gallons is 0.01m^3? ...
*February 14, 2011*

**Math/Trig**

Write a polynomial of the smallest degree with roots 1, -3, and 4.
*February 11, 2011*

**geometry**

thank you sooo much damon :)
*January 27, 2011*

**geometry**

PLEASE HELP ME! i have this homework due tomorrow and i only have 1 question left and am sooo desperate for an answer: The diameter of the Dome of the Rock in Jerusalem is 20m. If it is plated with gold that is 5cm thick, find the cost of plating the dome in gold given that ...
*January 27, 2011*

**Math**

hey tills, i think its like this k? im unsure though.....: SA: (66x32)+ 2(1/2x63x32)+ 2(1/2x56x66):7824cm3 make a right triangle with 63 as the hypotemuse and 33 as the base. find the height from there then find the volume. to check its 3V/1024(this is 32x66)k? :)
*January 23, 2011*

**MATH**

omg tilla!! :D you totally helped. thankiess!!
*January 23, 2011*

**MATH**

Factorize the following : x4-x2-6 HELP!!!!!!
*January 23, 2011*

**MATH**

Factorize the following : x4-x2-6 HELP!!!!!!
*January 23, 2011*

**Math/Trig**

Solve: sin x - 2sin x cos x = 0 for 0 is less than or equal to x is less than 2pi.
*January 20, 2011*

**Math/Trig**

Solve: sin2 x = cos2 x for 0 degrees is less than or equal to x is less than 360 degrees.
*January 20, 2011*

**Math/Trig**

Solve: 2 sin x - 1 = 0 for 0 degrees is less than or equal to x is less than 360 degrees.
*January 20, 2011*

**Math/Trig**

Solve: 2 cos2 x - 3 cos x + 1 = 0 for 0 is less than or equal to x is less than 2pi.
*January 20, 2011*

**Math/Trig**

Find the radius of a circle with a central angle of pi/7 and a length of the intercepted arc equal to 7.7 cm. Round your answer to the nearest tenth.
*January 20, 2011*

**Math/Trig**

Find the area of triangleABC with B=47.6degrees, a=3.6, and c= 9.7. Round your answer to the nearest tenth.
*January 20, 2011*