Wednesday

August 31, 2016
Total # Posts: 252

**ecuaciones diferenciales**

Y'''+10y''+25y'=e^x
*August 18, 2016*

**Math**

Dan deposited $4000 into an account with 4.8% interest, compounded monthly. Assuming that no withdrawals are made, how much will he have in the account after 9 years? I was just wondering of the formula for this problem, because I am not able to find it in my book.
*August 11, 2016*

**math**

solution of if 2/7 of the 2905 student and if 30 % of the student play musical instruments, how many student play musical instruments?
*July 6, 2016*

**math**

IF 2/7 OF THE 2905 STUDENTS ARE FRESHMEN,AND IF 30% OF THE FRESHMEN PLAY MUSICAL INSTRUMENT,HOW MANY FRESHMEN STUDENTS PLAY MUSICAL INSTRUMENTS?
*July 6, 2016*

**algebra**

help me on the result of 3CSC{A}-Y6=0 or gave me exmples thank you
*May 27, 2016*

**Trigonometry**

two sightings of the top of a flagpole are taken 75 meters apart on level ground. The two sightings are 21° and 32°. What is the height of the flagpole?
*May 16, 2016*

**Math **

Points J and K, plotted on the coordinate grid, are two vertices of rectangle JKLM. Rectangle JKLM has an area of 7 square units. Point J is located at (2, 1) and point K is located at (-5, 1). Each vertex of the rectangle is located at a point that has integer coordinates. ...
*April 11, 2016*

**physics**

A small block of mass 2.7 kg is released from rest at the top of the curved frictionless ramp shown. The block slides down the ramp and is moving with a speed of 13.9 m/s when it collides with a larger block (1.5 times the mass). (Use g=10m/s²). If the larger block moves ...
*April 1, 2016*

**Math**

A community needs to raise at least $5000 to build a new skateboarding park. They are selling backpacks for $25 each to raise the money. Write and solve an inequality to determine the minimum number of backpacks they need to sell in order to reach this goal.
*March 8, 2016*

**Math**

A sales associate at a computer store receives a bonus of $100 for every computer he sells. He wants to make $2500 in bonuses next month. Write and solve an inequality to find the minimum number of computers he must sell.
*March 8, 2016*

**Who Am I**

I have 45 in the denominator I am equivalet to 4-9. What fraction am I
*March 1, 2016*

**physics**

In an engine, a piston oscillates with simple harmonic motion so that its position varies according to the expression x = 4.7 cos ( 4t + π/6 ) where x is in centimeters and t is in seconds. Find the period of the motion.
*February 28, 2016*

**Algebra**

Greg invested his savings in two investment funds. The amount he invested in Fund A was 3 times as much as the amount he invested in Fund B. Fund A returned a 6% profit and Fund B returned a 7% profit. How much did he invest in Fund B, if the total profit from the two funds ...
*February 18, 2016*

**math**

Your school is organizing a carnival. You are building a ramp for a game. The ramp will be 8 feet long with a total rise of 5 feet. Find the angle of elevation of the ramp.
*February 10, 2016*

**mathematics**

A patient gets tested for a disease. The test is 90% reliable (that is P(testing positive│have disease)=.9 . 2% of the population has this disease. The test gives a false positive 5% of the time (that is P(testing positive│NOT diseased)=.05). What is the ...
*February 4, 2016*

**Math**

A certain clock gains 3 minutes every hour if this clock shows the correct time at 6:00 an what time will the clock show when it is 1:00 pm of the same day?
*January 16, 2016*

**chemistry**

What is the percentage by mass of sodium (Na) in a formula unit of sodium hydrogen carbonate (NaHCO3)?
*January 11, 2016*

**physics**

What would the mass of a bowling ball be if it were to travel m/s with a momentum of 7000kg.m/s
*January 9, 2016*

**La**

5,-15,45,-135 is it arithmetic , geometric or neither ?
*December 16, 2015*

**Jefferson**

lisa is 6 years older than Tom. Their father's age is twice the sum of their ages. How old is lisa if her dad is 32?
*December 2, 2015*

**math**

Max and Jack bought a large pizza to share.Max ate 5/8 of the pizza.What fraction of the pizza was left for Jack.
*October 8, 2015*

**statistics**

you did it correctly. you just have to take the negative z score of -1.6 and convert it to a percentage that's to the left of that. to 4 decimal places it's .0548
*October 1, 2015*

**math**

ginger sent 18 text messages yesterday.jerry sent 4 more than twice as many messages as ginger sent. kyle sent 15 fewer messanges than jerry.how many test messges did jerry and kyle send?
*September 23, 2015*

**Math**

. Lopez has $9118 in her bank account on March 1st. She saves $609 in March. Then she must pay $1011 in taxes in April. Mrs. Lopez is able to save $705 in May. At the end of May, approximately how much greater or less is her account balance than it was on March 1st?
*September 17, 2015*

**Math**

A single processing machine makes two components, A and B, which are packaged together as the final product (each product sold contains one A and one B). The processor can make only one component at a time. There is a setup time when switching from A to B and back. The current...
*September 8, 2015*

**Trigonometry and Analysis**

Oscar has twice as many pennies than he has dimes. All together he has $.84. How many dimes and pennies does he have? I tried to solve this, but I know I did it wrong, because I got a decimal for the amount of dimes. Here's what I did: P=D*2 (.01)(P)+(.10)(D)=.84 (.01)(D*2...
*August 21, 2015*

**Microeconomics**

suppose Belgium produces only two goods, chocolate and lace. If Belgium has a comparative advantage in lace, a move toward free trade will a. benefit chocolate workers, harm lace workers in the short run, but benefit the nation as a whole. b. harm chocolate workers in the ...
*July 1, 2015*

**Microeconomics**

A ban on imported avocadoes will result in_______ a. an increase in the total surplus because domestic production will increase. b. no change in total surplus because the reduction in consumer surplus will offset the increase in producer surplus c. a reduction in total surplus...
*June 24, 2015*

**Microeconomics**

Thanks for the link and I will read more on this subject matter.. thanks again
*June 24, 2015*

**Microeconomics**

Okay, Ms. Sue this is very confusing for me is the answer A?
*June 24, 2015*

**Microeconomics**

okay, B. they lower the surplus in the market.
*June 24, 2015*

**Microeconomics**

taxes may cause deadweight losses because________. a. they transfer purchasing power from buyers to the government. b. they lower the surplus in the market. c. they increase consumer surplus at the expense of producer surplus d. they transfer purchasing power from sellers to ...
*June 24, 2015*

**English**

however; they all seem to have consonance and i could find a possible paradox in a,b, and c.
*June 8, 2015*

**English**

Which poetic line contains both paradox and consonance? A. One summer day, all day I drove it hard B. How long it might last, how young it might be C. Ay, look, and he'll smile thy gloom away D. At least to know the worst is I'm leaning towards c. being the right answer
*June 8, 2015*

**Economics**

Thanks for your thoughts
*May 29, 2015*

**Economics**

Why the private market for flu vaccinations would produce an inefficient outcome?
*May 29, 2015*

**Microeconomics**

suppose Belgium produces only two goods, chocolate and lace. If Belgium has a comparative advantage in lace, a move toward free trade will a. benefit chocolate workers, harm lace workers in the short run, but benefit the nation as a whole. b. harm chocolate workers in the ...
*May 20, 2015*

**Microeconomics**

D. all of the above
*May 18, 2015*

**Microeconomics**

Medical doctors earn higher incomes than people who have a Ph. D in economics. This is partly because A. Medical doctors are more likely to face malpractice lawsuits. B. The costs of receiving necessary medical education are higher C. A relatively small number of students are ...
*May 18, 2015*

**Science(need help)**

1) What evidence is there that the human species has been successful so far? Explain. 2) What environmental pressures in the past do you think were most important in shaping the human species as it exists today? 3) What environmental pressures exist now that you think may be ...
*April 7, 2015*

**calculus**

A ball is thrown from an initial height of 130 feet with an initial upward velocity of 35ft/s . The ball's height H (in feet) after T seconds is given by the following h=130-6t-16t^2
*April 6, 2015*

**Calculus study**

A baseball team plays in a stadium that holds 52000 spectators. With the ticket price at $9 the average attendance has been 21000. When the price dropped to $6, the average attendance rose to 26000. a) Find the demand function p(x), where x is the number of the spectators. (...
*March 30, 2015*

**chemistry**

How many grams of hydrogen are released by the reaction of 1.00 g of aluminum with excess potassium hydroxide solution assuming 100% yield
*March 12, 2015*

**Calculus**

42 ,ets
*February 9, 2015*

**physics**

In compressed state, a spring 3.00 meters long hanging from the ceiling has a potential energy of 2.0 joules. If the entire potential energy is used to release a ball of mass 1.2 kilograms vertically downward, then what is the kinetic energy of the ball when it reaches the ...
*December 17, 2014*

**Science **

Calculate the denstiy of a block if the volume is 20.0cm3 and the mass is 40.0 g
*December 10, 2014*

**Physics**

You throw a ball towards a wall at 15ms-1, and it bounces back at 10ms-1. What is the total change in velocity? (the answer is not 5m/s)
*December 3, 2014*

**math**

Paul has two thirds as many postcards and shawn the number of postcards shawn has three fifths of a number of postcard tim has if three boys have 280 postcards altogether how many more postcards does Tim have than Paul
*November 11, 2014*

**Physics**

A box weighing 178N slides down a ramp with an initial velocity of 0.5m/s^2. The ramp has an angle of 24 degrees and is 3m long. What is the acceleration of the box? I know that F=ma but how do I find a?
*November 9, 2014*

**Organic Chemistry**

Thank you.
*November 3, 2014*

**Organic Chemistry**

Also, the solvent used for extraction is ethyl acetate. So, the organic mixture to be separated by extraction dissolved in ethyl acetate.
*November 3, 2014*

**Organic Chemistry**

What type of info must I supply? Or is it too much info to be asked? If I can reclarify.. In the experiment, I am separating an unknown organic mixture of two solids by extraction. From this I will get the Basic layer, and acidic layer, both will be the source for isolating ...
*November 3, 2014*

**Organic Chemistry**

Hi, I did an extraction experiment. I've got my basic layer, and getting my acidic salt in return. To do this, I am instructed to first "add a small amount of NaCl to help with the product precipitation". Then, again I am instructed to add HCl to "acidify&...
*November 3, 2014*

**Statistics**

Carrie attained a score of 650 on the verbal section of her SAT. The mean grade was a 500 with a standard deviation of 100. What percentage of test takers scored below and above Carrie?
*October 30, 2014*

**Math**

greatest number means GCF? If your answer is yes, the answer will be 7?
*August 20, 2014*

**Math**

Dominic collects sports science fiction and history books. He has 21 books about sports, 35 books about science fiction, and 14 about history. He wants the same number of each type of book on each shelf. What is the greatest number of each type of book on each shelf?
*August 20, 2014*

**Algebra**

Shelly made 5 more sales calls than Clark . Shelly and Clark made a total of 33 sales calls. How many sales calls did each make .
*June 12, 2014*

**Macroeconomic **

Income taxes create a difference between the interest rate paid by companies and received by lenders. These taxes___________ saving, investment, and the growth rate of real GDP. A. Do not affect B. Lower C. Encourage, but may not change D. Increase The answer is C
*June 10, 2014*

**Macroeconomic **

An increase in the capital stock will: A. Shift production function downward. B. Shift the production function upward C. Flatten the production function D. Steepen the production function The answer is B?
*May 30, 2014*

**Macroeconomic **

Suppose that a market for a product is in equilibrium at a price of $5 per unit. At any price above $5 per unit. A. There will be an excess demand for the product. B. There will be an excess supply of the product. C. The quantity supplied of the product will be less than the ...
*May 29, 2014*

**Macroeconomic**

Thank you
*May 27, 2014*

**Macroeconomic **

All of the following statements are true of the Federal Reserve EXCEPT: A. Acts as the central bank for all countries in the world. B. Along with the Board of Governors, the chairperson of the Federal Reserve determines monetary policies and strategies based on state of ...
*May 27, 2014*

**Intro to computers**

Which type of updates should be installed in a test environment before being installed in a live enterprise environment.? A. Updates for Wkndows XP B. Recommend Updates C. Service Packs D. Security updates
*May 12, 2014*

**Finance**

The projected revenues and costs that form the basis of the potential for a project's acceptance or rejection are estimates of ______________. A. Future activity B. Past activity C. Known activity D. Current activity
*April 8, 2014*

**algebra **

Matthew would like to join an online book club that costs $84 per year. If he signs up for an automatic renewal, he will get 5% off his membership. If he signs up in July, he can get an additional 20% off. In addition, for every 2 people he refers to the club, he can get $5 ...
*March 8, 2014*

**Math**

pinche steve. ponete esmart
*February 22, 2014*

**Math**

if u cut the circle in half, and put the shapes on the side of the square u make a heart steve
*February 22, 2014*

**Physics**

two objects attract each other gravitationally with a force of (2.5)(10^-10)N when they are 0.25m apart. Their total mass is 4.0 kg. Find their individual masses.
*February 14, 2014*

**ASU**

Oppositely charged parallel plates are separated by 5.35 mm. A potential difference of 600 V exists between the plates. (a) What is the magnitude of the electric field between the plates? (b) What is the magnitude of the force on an electron between the plates? N (c) How much ...
*February 7, 2014*

**algebra**

what value makes the polynomial factor as a perfect square x+12+?
*February 5, 2014*

**History8**

Which of the following is NOT a position that President Monroe adopted from the federalists?
*January 16, 2014*

**us history**

all of the above with some coceine
*November 25, 2013*

**Accounting**

1.Calculate Genentech’s annual sustainable growth rate for the years 2003–2007. 8. a. Genentech’s sustainable growth rates are 2003 2004 2005 2006 2007 Sustainable growth rate (%) 10.6 12.0 19.0 28.6 29.3 2. Did Genentech face a growth management challenge ...
*November 2, 2013*

**MATH**

Cool
*October 17, 2013*

**Calculus 1**

Related Rates I am having trouble finding the equation to use to fit this all together. At noon, ship A is 100km west of ship B. Ship A is sailing south at 35 km/s and ship B is sailing north at 25 km/s. How fast is the distance between the ships changing at 4:00pm.
*October 10, 2013*

**Calculus 1**

Related Rates I am having trouble finding the equation to use to fit this all together. At noon, ship A is 100km west of ship B. Ship A is sailing south at 35 km/s and ship B is sailing north at 25 km/s. How fast is the distance between the ships changing at 4:00pm.
*October 10, 2013*

**Calculus 1**

Related Rates I am having trouble finding the equation to use to fit this all together. At noon, ship A is 100km west of ship B. Ship A is sailing south at 35 km/s and ship B is sailing north at 25 km/s. How fast is the distance between the ships changing at 4:00pm.
*October 10, 2013*

**Calculus 1**

Related Rates I am having trouble finding the equation to use to fit this all together. At noon, ship A is 100km west of ship B. Ship A is sailing south at 35 km/s and ship B is sailing north at 25 km/s. How fast is the distance between the ships changing at 4:00pm.
*October 10, 2013*

**Calculus 1**

Related Rates I am having trouble finding the equation to use to fit this all together. At noon, ship A is 100km west of ship B. Ship A is sailing south at 35 km/s and ship B is sailing north at 25 km/s. How fast is the distance between the ships changing at 4:00pm.
*October 10, 2013*

**physics**

the above solution is correct except for the very last part. They did not take into account that it should have been: t^2=(2h/a) sqrt(t^2)=sqrt(2.06) t=1.44
*October 4, 2013*

**history**

i need to write this as a essay can you help me split up the ideas into paragraph and the opening and conclusion
*September 21, 2013*

**history**

Im living for 15 years in perfect background and with a good education and so are all the kids that live around me. Another reason my parents aren't college graduates and they've found jobs to make an affordable living with everything needed for themselves,for me,and ...
*September 21, 2013*

**history**

im living for 15 years in pefect background with a good education and so are all the kids that liv around me also that my parents arent college graduates and theyve found jobs to make a affordable living with everything needed and to plan vacations and their son is going to ...
*September 21, 2013*

**history**

yes iam but i cant think of any resaons can you give me hints
*September 21, 2013*

**history**

why im optimistic about our nations future can you help me i need to write a essay about this paragraph
*September 21, 2013*

**english**

your always here so on your time
*September 18, 2013*

**english**

off curiosity ms sue why do you do this
*September 18, 2013*

**question**

im a freshmen and i wan to become a architect what courses should i take in highschool and is it beter to take statistics or precalculas
*September 17, 2013*

**chemistry**

what is the density of unknown material with a mass of 17.44g if the dimensions are length 2.2cm, height 1.7cm, and width 4.1cm
*September 17, 2013*

**math**

There is something wrong with this definition for a pair of vertical angles: “If AB and CD intersect at point P, then APC and BPD are a pair of vertical angles.” Sketch a counterexample to show why it is not correct. Can you add a phrase to correct it?
*September 15, 2013*

**geometry**

There is something wrong with this definition for a pair of vertical angles: “If AB and CD intersect at point P, then APC and BPD are a pair of vertical angles.” Sketch a counterexample to show why it is not correct. Can you add a phrase to correct it?
*September 15, 2013*

**math**

0.316 in expanded form
*August 6, 2013*

**chem 223**

What additional volume of 10.0 M HCl would be needed to exhaust the remaining capacity of the buffer after the reaction described in Part B?
*July 22, 2013*

**math**

Answer: B) 7 minutes, 30 seconds per mile. It takes the slower runner 30/28 minutes longer than the faster runner to complete the race, or 1.071 times longer. Because the faster runner is going at 7 minutes per mile, the second runner is going at 7.5 minutes per mile (1.071 * ...
*May 28, 2013*

**kimball**

How many kilojoules of heat must be transferred to a 480-g aluminum pizza pan to raise its temperature from 22 degrees celsius to 234 degrees celsius?
*May 28, 2013*

**Chemistry**

we burn 12.50L of ammonia in 20.00L of oxygen at 500 degrees celsius. What volume of nitric oxide, NO, gas can form? what volume of steam, H2O (g) is formed? Assume that all gases are at the same temperature and pressure, and that the limiting reactant is used up 4NH3(g) + 5O2...
*May 6, 2013*

**Chemitry**

calculate the volume of 1.07M phosphoric acid solution necessary to react with 22.9 ml of 0.150M Mg(OH) 2H3PO4 +3Mg(OH)2 ==> Mg(PO4)2 + 6H20
*May 1, 2013*

**Chemistry**

calculate the volume of 1.07M phosphoric acid solution necessary to react with 22.9 ml of 0.150M Mg(OH)
*May 1, 2013*