Monday

May 2, 2016
Total # Posts: 899

**orgo**

A sample of naphthalene, which should be pure white, was found to have a grayish color after the usual purification procedure. The melting point was correct, and the melting point range was small. Explain the gray color.
*January 30, 2013*

**physical science**

about 8.2
*January 9, 2013*

**history**

in the later pharses of the civil war general running for president
*December 16, 2012*

**Medical Sociology**

i was also thinking communication and finances (even with insurance it can be difficult to pay for health care)
*December 12, 2012*

**Medical Sociology**

I was thinking people who live in inner cities are unable to get transportation or are unable to afford care even with insurance
*December 12, 2012*

**Medical Sociology**

Obamacare will enable 32 million more Americans to have health insurance. Despite this coverage, medical sociologists know that there are other barriers besides health insurance that make it difficult for patients to seek medical care. Describe 3 such barriers to seeking care...
*December 12, 2012*

**math**

f(x)=165*x what is the domain plz i need help
*December 5, 2012*

**sat essay**

We'll no a speech can't just change some one so I think not
*November 30, 2012*

**science **

speed=frequencyxwavelengthc=f please explain
*November 29, 2012*

**math**

what number is 33% of 500?
*November 27, 2012*

**math**

the reciprocal of the expression 2/x + 3/1
*November 23, 2012*

**math**

the reciprocal of the expression 2/x + 3/1
*November 23, 2012*

**Math**

578 of 850 employees work directly with guests what percentage of employees work directly with guests
*November 19, 2012*

**social studies**

What physical feature in Africa is located in the northeast and seperates it from Asia?
*November 13, 2012*

**Math (Algebra 1)**

24.333
*November 8, 2012*

**Math**

Central Middle School sold 50 tickets for one night of the school play. Student tickets sold for $2 each and adult tickets sold for $3 each. They took in $135. How many of each type of ticket did they sell?
*November 7, 2012*

**Physic**

A 10 kg particle moving along the x-axis experiences the force shown in figure. The particle goes from v=1.0m/s at x=0 and v=5.0 m/s at x=2. What is the f max?
*October 30, 2012*

**physics**

23 32 23 19
*October 23, 2012*

**science**

Thank you Ms.Sue you a super duper smart and you are the best! :) :D
*October 22, 2012*

**science**

Any websties that say if a snowflake is a crystal? |
*October 22, 2012*

**science**

Is a snowflake a crystal? Can you show me a website were i can read about what a crystal is?
*October 22, 2012*

**science**

Is a mineral a crystal?
*October 22, 2012*

**voltage drop**

12v r1=10 r2=15 r3=2 r3=18 how would one solve this
*October 22, 2012*

**CALC 251**

Suppose that f(x)= (e^x)/(x^2+16. Find f'(0).
*October 22, 2012*

**CALC 251**

Let f(x)= [5x^(1/4)]*(x^3-8) Evaluate at f'(x).
*October 22, 2012*

**math**

A water trough is 4 m long and its cross-section is an isosceles trapezoid which is 210 cm wide at the bottom and 280 cm wide at the top, and the height is 70 cm. The trough is not full. Give an expression for V, the volume of water in the trough in cm^3, when the depth of the...
*October 15, 2012*

**Calculus 251**

The slope of the tangent line to the curve y= 3x^3 at the point (-1,-3) is:? The equation of this tangent line can be written in the form y=mx+b where m is:? and where b is:?
*October 15, 2012*

**ENGLISH**

You can't expect people to do your homework for you. The whole idea is to help each other. I can check your answers but that's hard to do when you dont post any....
*October 14, 2012*

**finance**

You have been given the following information on a project: It has a 3-year lifetime The initial investment in the project will be $28 million, and the investment will be depreciated straight line, down to a salvage value of $6 million at the end of the fourth year. The ...
*October 13, 2012*

**Physics**

A truck is stopped at a stoplight. When the light turns green, the truck accelerates at 2.0 m/s2. At the same instant, a car passes the truck going 13 m/s. Where and when does the truck catch up with the car? _________m (from the intersection)
*October 7, 2012*

**math**

plz help
*October 3, 2012*

**Elena plz help**

help me plz
*October 3, 2012*

**math**

4. Point E is located at (–2, 2) and point F is located at (4, –6). What is the distance between points E and F? a. square root of 52 b. square root of 28 c. 10 d. square root of 20 5. In which quadrant is the point (x, y) located if x is negative and y is positive? ...
*October 3, 2012*

**math**

c d a
*October 3, 2012*

**Finance**

9.4 PERCENT
*October 2, 2012*

**algebra**

From a point on a straight road. Pablo and Kelsey ride bicycles in the same direction. Pablo rides 12mph and Kelsey ride 14mph. How many hours will they be 9 miles apart
*September 18, 2012*

**Algebra**

- The quotient of 6 and a number increased by 6 -> 6 / x+6 - The product of 9 and c decreased by 8 -> (9)(c-8)
*September 11, 2012*

**History**

What were the economic and social condition of America in the early 1900s (1900-1940)?
*September 11, 2012*

**CHEMISTRY**

HOW MANY GRAMS OF CALCIUM IS 3.08 MOL OF Ca?
*September 9, 2012*

**CHEMISTRY**

HOW MANY MOLES OF CALCIUM IS 139g OF Ca?
*September 9, 2012*

**CHEMISTRY **

HOW MANY ATOMS 0.151 MOL OF LITHIUM?
*September 9, 2012*

**CHEMISTRY**

HOW MANY MOLES OF LITHIUM IS 2.69XE9
*September 9, 2012*

**5th grade religion**

2012
*September 5, 2012*

**geometry**

Given x is the midpoint of yz. given xy =6x+4 and yz=40, fing the value of x
*September 5, 2012*

**Geometry**

Given x is the midpoint of yz. given xy =6x+4 and yz=40, fing the value of x
*August 13, 2012*

**health**

me to!! haha dey don't know
*August 11, 2012*

**chemistry**

If after precipitation of the Group I cations as chlorides by the reaction with HCl, nearly all of the precipitate dissolves in the hot water, what ion is most probably present and which ions are most probably absent?
*July 22, 2012*

**physics**

the motion of a particle along a straight line is described by the function x=(2t-3)^2 where x is in metres and t is in seconds. A)find the position ,veocity and acceleration at t=2 sec. B) find the velocity of the particle at origin.
*June 26, 2012*

**Physics**

Find the forces exerted by the two supports of a 4.0m, 50-kg diving board when a 60-kg woman stands at its end. The two supports are 0.8m apart. This time consider the mass of the diving board.
*June 24, 2012*

**physics**

A car starts from rest and travels for 6.3 s with a uniform acceleration of 2.3 m/s2. The driver then applies the brakes, causing a uniform acceleration of −1.9 m/s2. If the brakes are applied for 2.6 s, how fast is the car going at the end of the braking period?
*June 7, 2012*

**Calculus**

Find the shortest distance between the two skew lines L1 and L2 with equations r = [1,2,2] + s [4,3,2] and r = [1,0,-3] + t [4,-6,-1]
*May 26, 2012*

**Calculus**

Find the shortest distance from a point P(2,-1,2) to a line L r= [-1,0,7] + t [4,1,-2].
*May 26, 2012*

**Calculus**

thanks reiny!
*May 26, 2012*

**Calculus**

7. Where does the line r = (1, 2, -5) + t (2, -3, 1) meet the plane 2x + 5y - 3z = 6?
*May 26, 2012*

**Calculus**

6. Find out if the line r = (1, 3, 8) + t (-2, 5, 7) is parallel to the plane 3x + 4y - 2z = 1
*May 26, 2012*

**Calculus**

5. Determine an equation for the plane that is exactly between the points A(-1, 2, 4) and B(3, 1, -4).
*May 26, 2012*

**Calculus**

thank you reiny, thats the answer i first got but i wasn't sure if it was right, thanks
*May 26, 2012*

**Calculus**

4. Write a vector equation of the line through the point (5, -2, 3) and parallel to the vector v=[4, -3, 1]
*May 26, 2012*

**Calculus Grade 12 University**

for the #4 i got r = (5, -2, 3) + t(4, -3, 1) --- can you please help me on 5, 6, 7. instead since i got 4. thanks steve
*May 26, 2012*

**Calculus Grade 12 University**

thanks steve. do you know how to do these ones? :( 4. Write a vector equation of the line through the point (5, -2, 3) and parallel to the vector v=[4, -3, 1] 5. Determine an equation for the plane that is exactly between the points A(-1, 2, 4) and B(3, 1, -4). 6. Find out if ...
*May 26, 2012*

**Calculus Grade 12 University**

8. Find the vector equation of the line in which the 2 planes 2x - 5y + 3z = 12 and 3x + 4y - 3z = 6 meet.
*May 26, 2012*

**Calculus grade 12**

7. Where does the line r = (1, 2, -5) + t (2, -3, 1) meet the plane 2x + 5y - 3z = 6?
*May 26, 2012*

**Calculus**

6. Find out if the line r = (1, 3, 8) + t (-2, 5, 7) is parallel to the plane 3x + 4y - 2z = 1
*May 26, 2012*

**Calculus**

5. Determine an equation for the plane that is exactly between the points A(-1, 2, 4) and B(3, 1, -4).
*May 26, 2012*

**Calculus**

4. Write a vector equation of the line through the point (5, -2, 3) and parallel to the vector v=[4, -3, 1]
*May 26, 2012*

**Calculus**

6. Find out if the line r = (1, 3, 8) + t (-2, 5, 7) is parallel to the plane 3x + 4y - 2z = 1
*May 25, 2012*

**Calculus**

5. Determine an equation for the plane that is exactly between the points A(-1, 2, 4) and B(3, 1, -4).
*May 25, 2012*

**Calculus**

is it like this r = (5, -2, 3) + t (4, -3, 1) thats all i have to do for this question?
*May 25, 2012*

**Calculus**

how do i do that...
*May 25, 2012*

**Calculus**

4. Write a vector equation of the line through the point (5, -2, 3) and parallel to the vector v=[4, -3, 1]
*May 25, 2012*

**Calculus**

thank you steve :)
*May 25, 2012*

**Calculus**

3. Determine that the vectors u=[t, 4, 2t+1] and v=[t+2, 1-t, -1] are perpendicular, find the possible values of the contant, t.
*May 25, 2012*

**Calculus**

thanks Steve!
*May 25, 2012*

**Calculus**

2. Give that the vectors u=[2, t, -4] and v=[1, -3, t-4] are perpendicular, find the value of the constant, t.
*May 25, 2012*

**Calculus**

thanks steve!
*May 25, 2012*

**Calculus**

1. Find a unit vector which is perpendicular to both of the vectors m=[4, 2, -3] and n=[2, -3, 1]
*May 25, 2012*

**spanish/help pleaseeeee**

cuando yo era chica, mi vida era muy diferente. Yo nunca trabajaba, solo jugaba con mis amigas. Mis padres iban al trabajo y mis abuelos me cuidaban. Nosotros no teniamos un televisor, por eso nos divertiamos con la conversacion, los juegos y la musica,
*May 24, 2012*

**Calculus**

thanks
*May 24, 2012*

**Calculus**

t(t+2) + 4(1-t) - (2t+1) = 0 t = 1,3 like that?
*May 24, 2012*

**Calculus**

3. Determine that the vectors u=[t, 4, 2t+1] and v=[t+2, 1-t, -1] are perpendicular, find the possible values of the contant, t.
*May 24, 2012*

**Calculus**

thanks!
*May 24, 2012*

**Calculus**

You want u.v=0 2 - 3t - 4(t-4) = 0 t = 18/7 like that?
*May 24, 2012*

**Calculus**

2. Give that the vectors u=[2, t, -4] and v=[1, -3, t-4] are perpendicular, find the value of the constant, t.
*May 24, 2012*

**Calculus**

thank you !
*May 24, 2012*

**Calculus**

| i j k | | 4 2 -3 | | 2 -3 1 | = [-7,-10,-16]/9√5 like this? please check if it's correct, thanks MathMate
*May 24, 2012*

**Calculus**

1. Find a unit vector which is perpendicular to both of the vectors m=[4, 2, -3] and n=[2, -3, 1]
*May 24, 2012*

**Maths**

Dear Rainy, Shape is 300 * 300 so total 90000 sq feet. Now since u know the shape, can u pl guide abt the answer. Thank u v much in advance. J
*May 22, 2012*

**Maths**

How many trees can be planted in an area of 90000 sq feet if vertically 8 feet distance and horizontally 3 feet distance is to be kept? Pl show the method of calculations.
*May 22, 2012*

**Calculus**

Write a vector equation AND parametric equations of the line through the points A(6,-1,5) and B(-2,-3,6) direction vector = [8,2,-1] a vector equation r = (6,-1,5) + t(8,2,-1) use that to write the parametrics how do i write parametrics
*May 17, 2012*

**Calculus**

using cartesian vectors ** forgot to include that.
*May 17, 2012*

**Calculus**

determine the each resultant a) 10 km/h north followed by 8 km/h west b) 25 N at 10 degrees to the horizontal and 30 N horizontally.
*May 17, 2012*

**Calculus**

three forces each of magnitude 50 N, act in eastward, westward, and northwest directions, Find the resultant force.
*May 17, 2012*

**Calculus**

determine the angle between the planes 2x + 2y + 7z = 8 and 3x - 4y + 4z = 5
*May 17, 2012*

**Calculus / a bit of physics**

explain why a scalar equation of the line exists in 2-D space, but not in 3-D space.
*May 17, 2012*

**Calculus**

determine an equation for each plane a) contains the point A(6,2,3), B(5,1,-3), and C(5,7,-2) b) parallel to 2x + 6y + 4z = 1 and contains the point P(3,2,1)
*May 17, 2012*

**intro to ethics - philosophy**

Some arguments have complex premises, where too much information is given. Outline the following argument.? Some matters of foreign policy are just beyond George W. Bush’s grasp, for, like in the matter of the prison in Iraq where that female soldier had her pictures ...
*May 16, 2012*

**Calculus**

determine the angle between the planes 2x + 2y + 7z = 8 and 3x - 4y + 4z = 5
*May 10, 2012*