Tuesday

February 28, 2017
Total # Posts: 1,523

**Pre-calculus/ trig**

Given the vectors a= (-1,9) and b= (4,2) explain the difference between a-b and b-a. Thank you for your help! :)

*December 17, 2015*

**Chemistry 12**

The molar heat of vaporization of water is 42 kJ/mol. How much energy is released by the condensation of 3.0 g of water? So for water there will just be one mol. I think this is how you do it, but it doesn't match the answer in the worksheet. q=mc delta t But we're not...

*December 10, 2015*

**geometry**

find orthocenter triangle PQR .P(1,7)Q (1,2)R (11,2).

*December 9, 2015*

**Science**

1. We dissolve 0.005 mole of strontium chromate in 1 L of solution at 25°C. Will a precipitate be formed?

*December 8, 2015*

**Algebra 1**

Adam wants to create a square garden with a walkway on all four sides. The width of the walkway is 4 feet. Write a function to represent the area of the garden in terms of the length of one side of the walkway, x. ???

*December 8, 2015*

**science**

Four racecars are driving at constant speeds around a circular racetrack. The data table gives the speed of each car and each car’s distance from the center of the track at one instant. Car Speed (m/s) Position (m) A 40 20 B 40 25 C 50 20 D 50 25 Rank the cars’ ...

*November 29, 2015*

**History**

D? I know that Britain is the answer to the last blank.

*November 20, 2015*

**History**

Yes, is it c? :)

*November 20, 2015*

**History**

1.As a result of the French and Indian War, ___ claimed all land west of the Mississippi River, and ___ gained control of all land east of it. a. Indians; Britain b. Spain; France c. France; Indians d. Spain; Britain If you have any other answers to this test please help me on...

*November 20, 2015*

**Chemistry**

How many grams of oxygen gas must react to give 2.70 g of ZnO? 2Zn(s)+O2(g)→2ZnO(s) Express your answer with the appro

*October 23, 2015*

**Algebra 1 HELP PLEASE!**

Thankyou!

*October 20, 2015*

**Algebra 1 HELP PLEASE!**

my guess was {0,1,2,3,4,5,6,7,8,9,10,12,14,16,18,20} Is that correct, because I have no idea what v is suppose to mean.

*October 20, 2015*

**Algebra 1 HELP PLEASE!**

suppose P equals {0,1,2,3,4,5,6,7,8,9} and V equals {2,4,6,8,10,12,14,16,18,20}. What is P (circle) V?

*October 20, 2015*

**Physics**

An electron has an initial speed of 4.00×106 m/s. What potential difference (sign and magnitude) is required to bring the electron to rest?

*October 19, 2015*

**Social Studies**

long island

*October 19, 2015*

**College**

Please,i need a chemical balanced equation between diethyl ether+ conc.sulphuric acid+ glacial acetic acid

*October 16, 2015*

**English**

Its from the story of the flood told by Utnapishtm

*October 13, 2015*

**English**

What does "lay upon sinner his sin" mean?

*October 13, 2015*

**Chemistry**

I have a lab question that is asking if the soda ash in our analysis was NaHCO3 instead of Na2CO3, how would the volume of acid added change from (a) the starting point to the phenolphthalein end point? (b) the phenolphthalein end point to the bromocresol green end point? (c) ...

*October 13, 2015*

**Physics**

A two-slit pattern is viewed on a screen 1.08 m from the slits. If the two fourth-order maxima are 52.8 cm apart, what is the total width of the central bright fringe?

*September 24, 2015*

**AP Physics**

A baseball player throwing the ball from the outfield usually allows it to take one bounce on the theory that the ball arrives sooner this way. Suppose that ball hits the ground at an angle θ and then bonuses but loses half of its speed. A. Assuming that the ball is ...

*September 22, 2015*

**math**

What is the z-score such that the area under the curve to the left is .48?

*September 20, 2015*

**phyics**

A car takes 11 s to go from v=0m/s to v = 22 m/s at constant acceleration. If you wish to find the distance traveled using the equation d=1/2at2, what value should you use for a? Please help on this i don't know what i should put i think m/s squared but i am not sure ...

*September 19, 2015*

**Chemistry**

Calculate the amount of heat required to raise the temperature of a 65-g sample of water from 32∘C to 65∘C. (The specific heat capacity of copper is 4.184 J/g∘C.) Express your answer in Joules.

*September 19, 2015*

**phyics**

A dart leaves the barrel of a blowgun at a speed v. The length of the blowgun barrel is L. Assume that the acceleration of the dart in the barrel is uniform. Find a time that the dart moves inside the barrel. Express your answer in terms of the variables L and v. If the dart&#...

*September 19, 2015*

**phyics**

Why does the distance traveled by the ball in each half second after it is released change in the way that it does? A.Gravity is pulling down on the ball, so it accelerates down at a steady rate. B.The incline plane pushes up on the ball, so it accelerates down at a steady ...

*September 19, 2015*

**U.S history**

Was Slavery the basis of freedom in colonial America? This what I hvae written I feel like its to much and would like to shorten it and make it sound more college level plz help. In colonial America slavery was the basis of freedom. In areas such as Europe and foreign ...

*September 16, 2015*

**Physics**

The magnitudes of the four displacement vectors shown in the drawing are A = 14.0 m, B = 11.0 m, C = 12.0 m, and D = 25.0 m. Determine the (a) magnitude and (b) direction for the resultant that occurs when these vectors are added together. Specify the direction as a positive (...

*September 16, 2015*

**Algebra II**

line passing through (0,3) that is perpendicular to x + y = 5 I thought it was y = -2x + 3 Answer is: y = x + 3 How did they get this? Thank you so much

*September 13, 2015*

**phyics**

Consulting the graph shown in (Figure 1) , determine the object's average velocity over the time interval from 2 to 4 seconds. Express your answer in meters per second to the nearest integer. Position versus time graph for an object traveling with a non-constant velocity. ...

*September 13, 2015*

**phyics**

Consulting the graph shown in (Figure 1) , determine the object's average velocity over the time interval from 2 to 4 seconds. Express your answer in meters per second to the nearest integer. Position versus time graph for an object traveling with a non-constant velocity. ...

*September 12, 2015*

**Government**

What is meant by “standards of justice have not always been met”? Provide examples of some efforts that have been made to reach the goals of justice at all?

*September 12, 2015*

**physic**

Suppose a runner completes one lap around a 400-m track in a time of 50 s. Calculate the average speed of the runner. please explain process

*September 12, 2015*

**Physics**

A very narrow beam of white light is incident at 56.10° onto the top surface of a rectangular block of flint glass 12.7 cm thick. The indices of refraction of the glass for red and violet light are 1.640 and 1.663, respectively. Calculate the dispersion angle (i.e., the ...

*September 11, 2015*

**Physics**

An object is placed 11.3 cm to the left of a diverging lens of focal length -6.51 cm. A converging lens of focal length 11.6 cm is placed a distance of d to the right of the diverging lens. Find the distance d that places the final image at infinity.

*September 11, 2015*

**algebra**

suppose 48 out of every 120 people like baseball. of the people who like baseball, 3 out of 5 play baseball. If you ask 500 people, how many would you expect to play baseball?

*September 9, 2015*

**Physics**

A light bulb is placed 19.6 cm in front of a concave mirror. When the concave mirror is replaced by a plane mirror in the same location, the bulb's image moves 5.50 cm closer to the mirror. Calculate the focal length of the concave mirror.

*September 8, 2015*

**intermediat Algebra**

2.2 miles

*September 7, 2015*

**alGEBRA 1**

thats wrong

*September 7, 2015*

**alGEBRA 1**

how many minutes in a year?

*September 7, 2015*

**alGEBRA 1**

simplify show all work: radical m^13

*September 5, 2015*

**cnn student news world georgraphy**

i know cant you search on the cnn website they are really short vedios?

*August 27, 2015*

**cnn student news world georgraphy**

yes i am i just finsihed watching the first one 8/20 vedio but i couldnnt find the part where it says shout out write the answer to today's shoutout? why is this significant?

*August 27, 2015*

**cnn student news world georgraphy**

yes i am i just finsihed watching the first one 8/20 vedio but i couldnnt find the part where it says shout out write the answer to today's shoutout? why is this significant?

*August 27, 2015*

**cnn student news world georgraphy**

i know but i need help /

*August 27, 2015*

**cnn student news world georgraphy**

because im don't have headphones and im in the er

*August 27, 2015*

**cnn student news world georgraphy**

i need someone to go on the cnn student news website and listen to the two vedios dated 8/20/15 abd 8/26/15 on the 8/20 write the answer to todays shout out" why is this significant? briefly describe the news stories from today:5 reflection write a 4-5 sentence summary ...

*August 27, 2015*

**math**

34-5^2 / 5 * 2^2

*August 24, 2015*

**psychology**

It is B

*August 24, 2015*

**Algebra**

Thank you Steve!

*August 24, 2015*

**Algebra**

Can you please help me solve: Fifteen less than twice some number is 115. 15 - 2x = 115 is this the correct equation? thank you

*August 24, 2015*

**Word problems**

A truck left midville at 2:00 p.m. for Carmine, traveling at 40 mil/hr. At 3:15 p.m. a car left Carmine for Midville at 55 mi/hr. The truck and car passed each other exactly 2 hours before the car reached Midville. How far is it from Midville to Carmine? Can someone please ...

*August 23, 2015*

**Ss**

what are the major interstates in ga? how would i get to brunswick island, ga from lawrenceville ga? how many interstates run through atlanta? what interstates would i or could i take from kennesaw ga to get to south carolina? what three major interstates run into alabama? ...

*August 23, 2015*

**Math/Logic Puzzle**

Can someone please help me? Charlotte and Amy are picking strawberries. If Charlotte picks 6 dozen dozen strawberries, and Amy picks a half-dozen dozen strawberries, which hedgehog will pick the larger crop of strawberries? How many did they pick? Thank you.

*August 23, 2015*

**georgia state history**

any ss tutor here who is good with ss georgia state history

*August 23, 2015*

**Math**

(8*2_10)_2*3 to the 7th power = 4374

*August 19, 2015*

**cp biology**

by helping me

*August 18, 2015*

**cp biology**

include the following vocabulary when completing the concept map. be sure to PLACE THE WORDS in the correct step of the scientific method, and DISCUSS what occurs at each step. words: qualitative data quantitative data independent variable data analysis/ interpretation law ...

*August 18, 2015*

**math**

for part a i got:d 1 20 b. how to solve and what to solve in order to get the answer

*August 18, 2015*

**math**

Paula always withdraws 20 dollars more than she needs from the bank. a. Write an expression for the amount of money Paula withdraws if she needs d dollars. b. Find the amount of money Paula withdraws if she needs 20, 60, and 75 dollars.

*August 18, 2015*

**Math**

Thank You

*August 18, 2015*

**Math**

ok can you pls tell me how to get the answer that will be great help to me.

*August 18, 2015*

**Math**

I did not post anything,yesterday. is the same questions was posted by anyone.

*August 18, 2015*

**Math**

It takes Kasey 1 2/3 hours to bike the Woodlawn Trail. It takes her 3 5/6 hours to bike the Hammerside Trail. How many times as long does it take Kasey to bike the Hammerside Trail than the Woodlawn Trail ? A. 2 1/6 B. 2 3/10 C. 2 1/3 D. 5 1/2 How to solve this help me

*August 18, 2015*

**Chemistry H**

"When you pulled the steel wool apart, you found that the mass was unchanged. When you heated the steel wool, you found that the mass changed. Explain."

*August 15, 2015*

**Chemistry**

"When you pulled the steel wool apart, you found that the mass was unchanged. When you heated the steel wool, you found that the mass changed. Explain."

*August 15, 2015*

**Math**

A recipe requires 3/4 cup of nuts for 1 batch of muffins. How many batches of muffins can be made using 7 1/2 cups of nuts?

*July 10, 2015*

**Physics**

A model rocket is fired vertically from the ground with a constant acceleration of 44.3 m/s2 for 1.95 s at which time its fuel is exhausted. What is the maximum height (in m) reached by the rocket? Shouldn't this just be d=rt? 44.3(1.95), but I'm not getting the right ...

*June 29, 2015*

**Physics**

Olympic diver Matthew Mitcham springs upward from a diving board that is 3.00 m above the water. He enters the water at a 79.0 degree angle with respect to the water surface, at a speed of 9.01 m/s. Determine the magnitude of his initial velocity. Determine the direction of ...

*June 19, 2015*

**Algebra 1**

You are planning a rectangular patio with length that is 7 ft less than three times its width. The area of the patio is 120 ft^2. What are the dimensions of the patio? I just need to figure out what equation to write from this. I'm thinking something along the lines of 3x^...

*June 13, 2015*

**chemistry**

How would this problem be worked using dimensional analysis? Answer is 1.32g and I can work it (.900/13.6) * 20 = 1.32 But i need it in dimensional analysis and the hint was to first find volume of mercury. How many grams of alcohol with a density of 0.900 g/cm3 will have the ...

*May 25, 2015*

**Honor's Personal Finance**

What is the difference between the cost of attending a particular school and the expected family contribution, minus any other financial aid?

*May 13, 2015*

**Language**

Don't cheat. That makes you weird. And only Weird, unsuccessful people cheat. Stop right now.

*May 12, 2015*

**life orintation**

human rights violation that has taken place in your community

*May 10, 2015*

**AP CALC**

What property must f satisfy if the local linear approximation of f is always greater than or equal to the function's value for all x in an interval containing the point of tangency?

*April 24, 2015*

**Algebra 1**

Which answer choice shows 2x-y=z correctly solved for y? A: y=2x+z B: y=2x-z C:y=-2x+z D: y=-2x-z Here's how I did it: 2x-y=z -y=2x+z y=-2x-z Am I right? I have a feeling I'm not, so I would like some confirmation one way or the other.

*April 20, 2015*

**AP CALC**

My work lim f(x) =3 x->0- lim f(x) =b x->0+ 3=b lim f'(x)=-1 x->0- lim f'(x) =a x->0+ a=-1 therefore a+b=2 AM I RIGHT? Please help

*April 14, 2015*

**AP CALC**

If f(x)= { e^(-x)+2, for x<0 { ax+b, for x=>0 is differentiable at x=0, then a+b=_____?

*April 14, 2015*

**Algebra 1**

A pyrotechnician plans for two fireworks to explode together at the same height in the air. They travel at speeds shown at the right. Firework B is launched 0.25 s before Firework A. How many seconds after Firework B launches will both fireworks explode? Firework A: 220 ft/s ...

*April 13, 2015*

**math**

-2h-21+4h<_9

*April 13, 2015*

**beginig algebra**

k=-13

*April 13, 2015*

**beginig algebra**

what is -3(k-4)=51

*April 13, 2015*

**earth science**

What is the most abundant fossil fuel? A:Coal B:Gas C:Wood D:Oil

*April 12, 2015*

**AP CALC**

Write a definite integral in terms of x that represents the volume of a sphere with radius 2.

*April 8, 2015*

**AP CALC**

Thanks!!

*April 6, 2015*

**AP CALC**

At any time t=>0 , in days, the rate of growth of a bacteria population is given by y' = ky, where y is the number of bacteria present and k is a constant. The initial population is 1500 and the population quadrupled during the first two days. By what factor will the ...

*April 6, 2015*

**math**

joel runs 7 miles in 60 minutes. at the same rate ,how many miles would he run in 24 minutes

*April 6, 2015*

**AP CALC**

1.Suppose the amount of water collected from a mountain spring decreases over the summer at a rate of 1.5% per day. When will the spring's output fall to four-fifths its present level? Select one: a. 61.086 days b. 34.055 days c. 14.876 days d. 3.347 days e. 52.714 days 2...

*April 5, 2015*

**CGCC**

What mass of manganese(II) chloride must react with sulfuric acid to release 54.0mL of hydrogen chloride gas at STP? MnCl2(s)+H2SO4(aq)¨MnSO4(aq)+2HCl(g)

*April 5, 2015*

**chemistry**

w=500 q=291 dE = 791

*April 4, 2015*

**Math**

LOL IDK XD

*April 3, 2015*

**Math**

O_O

*April 3, 2015*

**Spanish**

My question is "¿Qué le diste a tu madre o a tu padre en su cumpleaños?" This is my answer, please tell me if I wrote it right. "Para los cumpleaños de mis padres le di a mi padre una taza super hombre y mi madre una pintura enmarcada...

*March 22, 2015*

**math**

32, k 3 , are three consecutive arithmetic terms find k

*March 19, 2015*

**AP CALC**

1. Let f be a twice-differentiable function such that f (2) = 8 and f (4) = 5. Which of the following must be true for the function f on the interval 2 ≤ x ≤ 4. I. The average value of f is 6.5 II. The average rate of change of f is -1.5 III. The average value of f...

*March 15, 2015*

**Math**

Katy just brought a brand-new 2009 Toyota Camry Hybrid FOR $30,000. Her car was traded in for $16,000. What fraction of the purchase price was not covered by the trade-in? 30,000 -16,000 = $14,000.is the amount not covered. Can you tell me what method to use or how to change $...

*March 7, 2015*

**immaculate college**

FindA if (2sinA\2)squared=2

*March 4, 2015*

**Physics**

A .5 kg football is thrown and reaches a stationary receiver with a speed of 15m/s. The receiver catches the ball and brings it to rest in .2 sec. a) What is the impulse delivered to the ball? b) What is the average force exerted on the receiver?

*March 4, 2015*

**Physics**

Starting from rest, a 4-kg block slides 10 m down a frictionless 30 degree incline. Determine the work done on the block by a) The force of gravity b) The normal force c) All of the forces (the net force) on the block d) Find the Kinetic energy of the block at the end of the ...

*March 4, 2015*