Monday

May 25, 2015

May 25, 2015

Total # Posts: 1,738

**Math**

Prove the identities: (sin^2x-1)^2 = cos(2x)+sin^4x
*May 15, 2015*

**chem**

I meant 3 sig figs.
*May 12, 2015*

**chem**

Thanks for the help! I around my answer to 4 sig figs, so my answer is 21.4 g of NO. thanks for the help again!
*May 12, 2015*

**chem**

Use the balanced equation, N2 + O2 --> 2NO, to answer the following questions... A) How many grams of NO are formed from 10.0g of N2? I really don't know how to do this, so please show work so i know. There are more questions to this question but i want to see how it ...
*May 12, 2015*

**Math**

The sea ice around the south pole fluctuates between 18 million square kilometers in September to 3 million square kilometers in March. During how many months are there more than 15 million square kilometers of sea ice?
*May 8, 2015*

**Music**

how would you relate the phrase (messed around) with education
*May 7, 2015*

**math calc**

A water tower is located 354 feet from a building. From a window in the building, an observer notes that the angle of elevation to the top of the tower is 42° and that the angle of depression to the bottom of the tower is 20°. How tall is the tower? How high is the ...
*April 21, 2015*

**Trigonometry**

I found the answer! i just need to change my mode settings from radians to degrees or i could of change the degrees to radians without changing the mode(maybe?).
*April 20, 2015*

**Trigonometry**

A 19-ft ladder leans against a building so that the angle between the ground and the ladder is 80∘. How high does the ladder reach on the building? I did 19sin(80) to get me 18.76847847 for how high the ladder reach on the building... but when i put the answer, it's ...
*April 20, 2015*

**math**

3/8 × 5/6 = 15/48
*April 16, 2015*

** math**

LeanNE walks at an average speed of 3 1/3 mph. How far does she walk in 2hrs 15 minutes? 10/3 × 9/4 == 90/12 would equal 7 1/2 miles
*April 16, 2015*

**trigonometry**

For B... i meant to say 48/7 pi not 487pi
*April 13, 2015*

**trigonometry**

I wont be receiving credit for these problems but i was just wondering how would i answer them... A) The area of a sector of a circle with a central angle of 25π rad is 21 mm². B) The angle between 0 and 2π in radians that is coterminal with the angle 487π ...
*April 13, 2015*

**Physics**

3. A bullet is fired from at a shooting range. The bullet hits the ground after 0.32 seconds. How far did it travel horizontally and vertically in this time if it was fired at a velocity of 1100 m/s?
*April 12, 2015*

**Geometry **

Write a two column proof: Given: ABCD is a parallelogram BQ is conguent to DS, PA is congruent to RC Prove PQRS is a parallelogram
*April 9, 2015*

**chemistry**

Phosphorus reacts with water to form hydrochloric acid and phosphoric acid. how many moles of acid are formed when starting with 4.5 g of PCl5 and excess H2o?
*April 9, 2015*

**Math**

Put this matrix in Reduced Row Echelon Form. Make sure that you list the Elementary Row Operations that you use and show every step in order to solve this. [ 1 2 1 -2 -3 1 3 5 0]
*April 9, 2015*

**Math**

Put this matrix in Reduced Row Echelon Form. Make sure that you list the Elementary Row Operations that you use and show every step in order to solve this. [ 1 2 1 -2 -3 1 3 5 0]
*April 8, 2015*

**trigonometry**

You are standing on the equator of the earth (radius 3960 miles). a) what is your linear speed in miles per hour? b) what is the angular speed in radians per hour?
*April 8, 2015*

**math**

how can you use a right angle to decide how to name another fraction
*March 30, 2015*

**math**

6/n=5/10
*March 24, 2015*

**Chemistry**

An unknown gaseous hydrocarbon contains 85.63 % carbon. If its density is 0.488 g/L at 0.355 atm and 100°C, what is the molecular formula of the gas? I can't figure this out. By assuming the total mass to be 100g, I get 85.63g C and 14.37g H which I then used to get ...
*March 18, 2015*

**spanish Homework**

The directions say... Complete the following sentences with the correct preterit form of the logical verb in parentheses. Here I have listen 3 out of the 15 questions. I am not really sure what the directions are asking me to do. Mis padres me ____ (llegar / llamar) por tel&...
*March 10, 2015*

**Chemistry**

Calculate the pH of a buffer that is 0.130M in NaHCO3 and 0.295M in Na2CO3
*March 4, 2015*

**Chemistry**

Why is it that Hydrogen fluoride has a boiling point of 19 degree celsius, whereas water has a boiling point of 100 degree celsius.
*February 25, 2015*

**Physics**

A flight controller determines that an airplane is 34.0mi south of him. Half an hour later, the same plane is 42.0mi northwest of him. The general direction of the airplane’s velocity is? If the plane is flying with constant velocity, what is the direction of its velocity...
*February 24, 2015*

**physics**

A 7.00-kg bowling ball moves at 2.15 m/s. How fast must a 2.40-g Ping-Pong ball move so that the two balls have the same kinetic energy?
*February 17, 2015*

**math**

Marty ate 4/6 of his pizza and Luis ate 5/6 of his pizza. Marty ate more pizza than Luis. How is that possible?
*February 11, 2015*

**Math**

On a Christmas package, Audrey needs to use only 40-cent stamps and 16-cent stamps. If she uses twice as many 40-cent stamps as 16-cent stamps, how many of each type of stamp must she use to mail a package costing $5.76 in postage? How can i set this up? I need help please.
*February 10, 2015*

**physics**

a 0.25 kg mass at the end of a spring oscillates 2.2 times per second with an amplitude of 0.15m. Determine the speed when it passes the equilibrium point and the speeed when it is 0.1 m from equilibrium
*January 25, 2015*

**physics**

a spring with a k=225 N/m is attached to a ball (m=1.00kg) on a horizontal frictionless table. The ball is pulled 15.0 cm to the right and then released: Find f
*January 25, 2015*

**Business Communitcation**

1. job seekers 2. someone is looking for a job or internship
*January 25, 2015*

**Business Communitcation**

I'm coming up with a study guide for the class test but need an answer to this: Analyze the implied audience of these two web pages: Career Builder and University of Dayton Career Services. careerbuilder (dot) com udayton.edu (slash)careerservices 1. Who is the audience ...
*January 25, 2015*

**Health**

Can a girl take a pregnancy test 5 days before her missed period? And when is the best time for her to take the test?
*January 16, 2015*

**Maths**

The first, third and ninth terms of an arithmetic sequence form the terms of a geometric sequence. Find the common ratio of the geometric sequences. a, a+2d, a+8d a+2d/a = a+8d/a+2d ?
*January 16, 2015*

**statistics**

The lifetimes of light bulbs of a particular type are normally distributed with a mean of 370 hours and a standard deviation of 5 hours. What percentage of bulbs has lifetimes that lie within 1 standard deviation of the mean on either side?
*January 12, 2015*

**Statistics**

If light bulbs have lives that are normally distributed with a mean of 2500 hours and a standard deviation of 500 hours, what percentage of light bulbs have a life less than 2500 hours
*January 12, 2015*

**physics**

A child is pulling a sled across a horizontal surface by a rope that makes a 27.5 degree angle with the ground. The child pulls with a force of 32.7 N and the total mass of the sled is 23.5 kg. Find the weight of the sled.
*January 7, 2015*

**language arts**

your welcome!
*December 10, 2014*

**language arts**

To me yours sounds like D but I haven't gotten that far yet. The reason I agree with that is how arrogant he originally was and this question ask how he changed so it really does sound like D
*December 10, 2014*

**language arts**

I am going to go check it out!! Connections is online school! I have read the two chapters and listened to youtube reading of them and the only thing messing with me is the fact more than one answer can be found in those chapters so maybe I should reread the questions..:) I ...
*December 10, 2014*

**language arts**

Are you in connections? I am having a tough time with chapter 1-2 the questions make it hard to understand which one is correct. In the QC I am stuck on all of the answers are in the book Seriously not following this story at all apparently :(
*December 10, 2014*

**English Check!! The Cay**

Thanks I did have it marked as C but to be honest I was concerned that it may be A as the choice for A does get described in the first chapter...I am still confused on this one
*December 10, 2014*

**English Check!! The Cay**

The Cay Which of the following details from the exposition will most likely connect to the larger plot of the story? A)the german submarines are described as silent hungry sharks B)Phillips fathers name is also Phillip C) The Germans sink the Empire Tern as it leaves Curacao...
*December 10, 2014*

**Language arts Check answers please!!**

Anyone?
*December 10, 2014*

**Language arts Check answers please!!**

The Cay Which of the following passages from the novel best describes the setting? A) I was not frightened just terribly excited B) The fort looks as though it came out of a storybook with gun ports along the high wall that face the sea ***** I choose this one! C) My mother ...
*December 10, 2014*

**language arts**

What chapter are you on?
*December 9, 2014*

**Math**

How many people can eat 2 pizzas
*December 2, 2014*

**Math**

A ladder is leaning against the side of a house so that it can reach a window that is 25 feet off the ground. The angle in which is formed between the ladder and the ground is 52 degrees. How far from the base of the house is the base of the ladder? Round the answer to the ...
*December 2, 2014*

**math**

bob worked 32 hours per week at his job. his boss offers him a full-time position (40 hours per wee) and a $2 per hour raise. He now will be making $200 more per week. what was his hourly rate before the raise?
*November 20, 2014*

**Language(asap answers please!!!)**

I couldn't find this answer either but I thought it was probably A. We don't have a book for this class and the info we have on lesson just doesn't make it clear what part is most important! My choices were A or C
*November 20, 2014*

**chemistry**

methane(g) +water= carbon monoxide(g)+Hydrogen (g) use the bond energies in the following table to predict the delta H foe the reaction
*November 18, 2014*

**Science**

If you have 100g of vinegar and add 10g of baking soda, what should the total mass be?
*November 17, 2014*

**MATH HELP PLEASE**

I don't know how to do these 13/4(2x+3/4) It wants me to expand the linear expression and I got 13(8x+3)/16
*November 13, 2014*

**math**

A round, 6-ft wide hot tube is being built into a 12-ft by 30-ft rectangular deck. How much decking is needed for the surface of the deck?
*November 8, 2014*

**Math**

to find 6x8, can I use the facts for 5x4 and 1x4
*November 6, 2014*

**Math**

Larry purchased a ski lodge in Telluride for $850,000. His bank is willing to finance 70% of the purchase price. As part of the mortgage closing costs, Larry had to pay 4% discount points. How much did this amount to?
*November 6, 2014*

**physics**

a motorcycle wants to jump a ditch 4m wide. he leaves one side on a ramp that slopes up at 30 above horizontal. he lands at the same elevation at which he took off. his front wheel leaves the ground 2m before the edge of the ditch and comes down 3 m past the far side of the ...
*November 4, 2014*

**Statistical**

A botany student counted 11 blades of grass in one square centimeter of lawn and measured the lawn as a rectangle 61 m by 31 m. She reported that there were 208,010,000 blades of grass in the lawn. The precision of her conclusion: the answer is A. correctly represents her ...
*November 4, 2014*

**Math**

If the correct answer is 7.52609, which of the following entries would be counted as correct? That is, which entries are withing Webassigns default tolerance? select all that apply. 7.4 7.3680 7.53 7.458 7.68 7.5938
*November 1, 2014*

**calculus**

A woman pulls a sled which, together with its load, has a mass of m kg. If her arm makes an angle of θ with her body (assumed vertical) and the coefficient of friction (a positive constant) is μ, the least force, F, she must exert to move the sled is given by If &#...
*October 30, 2014*

**math**

Hanna and Fran have $120, Hanna and Pete have $230. Pete has 6x more than Fran. How much money does Hanna have?
*October 27, 2014*

**precalculus**

Three friends want to share a circular 12-inch pizza equally by exactly only two parallel cuts. How far from the center must the cuts be? Hint: The pizza is a circle of radius 6 inches.
*October 26, 2014*

**Math**

a car is 48 times bigger than a model that you are building if the tires are 27 inches tall how tall will the tires on the model be
*October 15, 2014*

**Art Again**

Help please!
*October 13, 2014*

**Art Again**

The Bridge at Argenteuil By Claude Monet How did the artist create interesting textures in this image? by experimenting with various brushstrokes (My Choice) by using only one color by concentrating on negative space by using no value changes This class is so HARD! I have ...
*October 13, 2014*

**Art Need help Please**

These test are hard!!
*October 13, 2014*

**Art Need help Please**

Bump
*October 13, 2014*

**Art Need help Please**

Adoration of the Shepards by Nicolaes Maes How has the artist used value in this painting? The background is lighter than the foreground to draw the viewers eye The artist did not use value in this painting The subject is lighter than the background to draw the viewers eye (my...
*October 13, 2014*

**math**

Find the equation of the tangent line to the graph of f(x) = (4x − 8)/(x + 1) at x = 0. (Use y for your dependent variable.)
*October 9, 2014*

**Chemistry**

A buffer contains 0.50 mol CH3CO2H and 0.50 mol CH3CO2- diluted with water to 1.0 L. How many moles of NaOH are required to increase the pH of the buffer to 5.00? (pKa for CH3CO2H = 4.74)
*October 3, 2014*

**math**

a car traveling in a straight line has a initial velocity of 12.0 m/s.zoe steps on the gas and accelerates at at rate of 2 m/s2.The care ends up with a final velocity of 20.0 m/s.how long did it take zoe to reach this speed
*October 1, 2014*

**Chemistry**

How much energy must you use to raise the temperature of 100 grams of water from 60 degrees Celsius to 70 degrees Celsius? show you calculations. I am confused on how to use formulas.
*September 23, 2014*

**chemistry**

After isolating the sulfonated product, the filtrate volume is found to be 25.25 mL. A dilution using 1 mL of filtrate and 99 mL of water gives a solution with an absorbance of 0.427. How many moles of indigo carmine were produced? (Molar absorptivity of indigo carmine was ...
*September 22, 2014*

**algibra1**

One side of the triangle is twice as long as the second side. The remaining side is 4cm greater than the second side. The perimeter of the triangle is 24cm.Find the length of each side of the triangle.
*September 15, 2014*

**heat change**

if 89 j of heat is added to a gold coin with a mass of 12 g. what is the temprature change?
*September 10, 2014*

**chemistry**

A 6.0-ft person weighs 177lb. express this person's height in meters and weight in kilograms.
*September 7, 2014*

**chemistry**

thanks! but do you mind explaining it a bit to me?
*August 30, 2014*

**chemistry**

A first order reaction and a separate second order reaction both have the same rate of reaction. What is the effect on the rate of reaction for each reaction if the concentrations of reactants in both reactions are halved?
*August 30, 2014*

**history**

During Lyndon Johnson's presidency, which of the following legislative or executive measures banned literacy tests?
*August 28, 2014*

**Chemistry**

At 1 atm, how much energy is required to heat 43.0 g of H2O(s) at –22.0 °C to H2O(g) at 169.0 °C?
*August 25, 2014*

**Algebra 2**

I'm still confused. I don't get it. Sorry Farah.
*August 24, 2014*

**Algebra 2**

Can someone help me. Thankyou.
*August 24, 2014*

**Algebra 2**

It takes you 3 hours to mow a lawn & it takes your sister 2 hours to mow the same lawn. How long does it take the two of you to mow 12 lawns if you work together? Whats the answer? Helpppp
*August 24, 2014*

**Algebra 2**

never mind I got it
*August 24, 2014*

**Algebra 2**

The number of pages p a student can read varies directly with respect to time t in minutes spent reading. The student can read 90 pages in 60 minutes. Write an equation that relates pages read & time. Predict the number of pages in 90 minutes. Answer
*August 24, 2014*

**algebra 2**

You need to earn $475/wk to afford your new car. Your work week is 45 hrs & you get 1.5 time the regular hourly rate for any time over 40 hrs. How much do you need hourly?
*August 24, 2014*

**Algebra 2**

It's understood. Hvala Thanks.
*August 24, 2014*

**Algebra 2**

your local cable company charges $29.99/month for basic cable. Premium channels are available for a surcharge of $5.95/channel. You have $70/month budgeted for cable, how many premium channels can you purchase?
*August 24, 2014*

**math**

(A)Simplify: n 1 n-1 1. 2 . 25 --------------- n 50.50 2. n 4 n 1 2 - 6.2 --------------- n 2 2 .5 (B)solve for x (1 over 2) to the power x 1 =32
*August 24, 2014*

**math**

For which vAlues of x the following expressions not defined if all these expressions are real numbers 1. 2x-1 negative ------ 3x-2 2.square root of 2(x-7)
*August 24, 2014*

**math**

Describe the following reflections or translation in words 1.(x,y)--->(x,-y) 2.(x,y)-->(-y,-x) 3.(x,y)-->(x 4,y-4)
*August 20, 2014*

**chemistry**

Lovastatin is an anti-cholesterol drug that can be easily extracted from oyster mushrooms. A 291 mL lovastatin solution with a concentration of 0.001479 mol L-1 was extracted from 50 g of dried oyster mushrooms. Calculate the percentage of lovastatin in the mushrooms. ...
*August 17, 2014*

**math**

What is the area of a square computer screen with 21-in. sides? A. 84 sq. in. B. 220 sq. in. C. 42 sq. in. D. 441 sq. in. please help
*August 13, 2014*

**Geometry: Area and Volume Math**

oh ok thank you for the help
*August 13, 2014*

**Geometry: Area and Volume Math**

because I thought it was a square
*August 13, 2014*

**Geometry: Area and Volume Math**

so like 6cm x 6cm x 6cm x 6cm and that would be like 1296 right
*August 13, 2014*

**Geometry: Area and Volume Math**

In this problem I would multiply the 6cm right
*August 13, 2014*

**Geometry: Area and Volume Math **

What is the volume of a cube shaped box with edges 6 cm. in length? A. 1,296 cu. cm. B. 36 cu. cm. C. 18 cu. cm. D. 216 cu. cm. please help
*August 13, 2014*