Saturday
December 10, 2016

# Posts by jane

Total # Posts: 1,611

physics
a driver of a car traveling at 15.6 m/s applies the brakes causing a uniform deceleration of 2.1 m/s squared. how long does it take the car to accelerate to a final speeed of 10.9 m/s. answer in units of seconds
September 18, 2011

physics
a car enters the freeway with a speed of 5.6 m/s and accelerates uniformly for 2.7 km in 3.0 minutes.How fast is the car moving after this time? answer in units of m/s
September 18, 2011

physics
turner's treadmill starts with a velocity of -3.4 m/s and speeds up at regular intervals during a half hour workout. after 26 minutes the treadmill has a velocity of -7.6 m/s. what is the average acceleration of the treadmill during this period? answer in units of m/s ...
September 18, 2011

physics
a car accelerates uniformly from rest to a speed of 21.8 km/h in 5.9 seconds.find the distance it travels during this time. answer in units of meters
September 18, 2011

AP Calculus AB
If y = (((3x^2)+ 5)^5)((x+2)^4), then dy/dx = ? I've gotten to the point where i have (5((3x^2)+ 5)^4)(4(x+2)^3)(6x), what do i do next? It's a multiple choice question anf this is not one of the answers listed. Any help would be appreciated. Thanks!
September 18, 2011

PALO VERDE
SIMPLIFY [4 -1] + [-1 2] OVER [2 5] + [-2 -3]
September 14, 2011

childcare
The main difference between emergency care and first aid is the
September 13, 2011

math
polynomials (m + 7)(m - 3) + (m-4)(m+5)
September 13, 2011

statistics
A salesperson finds that, in the long run, two out of five sales calls are successful. Twelve calls are to be made. Let X = the number of concluded sales. Is X a binomial random variable? Explain!
September 12, 2011

math
arrange the following from least to greatest 3/8,2/4,6/9,9/12
September 9, 2011

Mathematics optimization
The arithmetic mean of two numbers a and b is the number(a+b)/2. Find the value of c in the conclusion of the mean-value theorem for f(x)=x^2 on any interval [a,b].
September 3, 2011

physics
nevermind!! i figured it out!
September 1, 2011

physics
Four vectors, each of magnitude 89 m, lie along the sides of a parallelogram. The angle between vector A and B is 77◦. A 89 m C 89 m B 89 m D 89 m What is the magnitude of the vector sum of the four vectors? Answer in units of m I got 346.8757431m, but that's not ...
September 1, 2011

algebra
6y+13=
August 30, 2011

physics
A body at rest is given an initial uniform acceleration of 8m/s2 for 30s after which the acceleration is reduced to 5m/s2 for the next twenty seconds. The body maintains the speed attained for 60s, after which it is brought to rest in 20s. 1. Draw the velocity time graph of ...
August 28, 2011

com/170
review the evaluatio paragraph on p.179 of the text. Identify what the author did well and what the author could hae done better.
August 16, 2011

com/170
review the evaluatio paragraph on p.179 of the text. Identify what the author did well and what the author could hae done better.
August 16, 2011

Calculus
A pipe in the shape of a right-angle elbow contains a vertical section and a horizontal section with a valve at the right angle. Presently the valve is closed and the vertical section of the pipe contains a column of water having length L. When the valve is opened, the amount ...
August 7, 2011

Physics
A ray of light falls on one of two plane mirrors placed at an angle of 90 degrees. show that the direction of the ray after two reflections is parallel to the direction of the original ray.
July 22, 2011

Physics
A lady looks at herself in a concave makeup mirror whose radius is 80cm.One of her eyes is on the axis of the mirror,16cm in front of the vertex.(a)Find the position and magnification of the image of the eye.(b) Is the image real or virtual?erect or inverted?
July 22, 2011

Calculus
Thank you and sorry I typed it wrong "a" is y
July 21, 2011

Calculus
3 numbers x y and z are to bea randomly chosen between 0 and 1. A What is the probability that X + y + z will be less than 1? B What is the probability that both x+ y<1 and 1<x+a Try your best and... Thanks alot!
July 21, 2011

Intro to calc
Sorry the last one had too many typos... Three numbers x y and z are to be randomly chosen between 0 and 1. A) What is the probability that X + y + z will be less than 1? B) What is the probability that both x+ y + z <1 and 1< x+y Try your best and... Thanks alot!
July 20, 2011

Intro to calc
3 numbers x y and z are to bea randomly chosen between 0 and 1. A What is the probability that X + y + z will be less than 1? B What is the probability that both x+ y<1 and 1<x+a Try your best and... Thanks alot!
July 20, 2011

com 156
need help with writing a thesis statement on renting an apartment is better than buying a house.
July 19, 2011

physical science
Pursley*
June 30, 2011

physical science
P!nk. Don't be mean. Bob parsley was just trying to help. He's right. The reason being is because when the force is in the same path as direction work is done. Although, if friction is involved the energy converts to heat and energy is lost. Therefore, work is not ...
June 30, 2011

College Physics
6. A tall bald student (height 2.1 meters and mass 93.1 kg) decides to try bungee jumping from a bridge. The bridge is 36.7 meters above the river and the "bungee" is 25.3 meters long as measured from the attachment of the bridge to the foot of the jumper. Treat the...
June 29, 2011

College Physics
1. A spring gun is made by compressing a spring ina tube and then altching the spring at the compressed position. A 4.97-g pellet is placed against the compressed and latched spring. The spring latches at a compression of 4.06 cm, and it takes a force of 9.12 N to compress the...
June 29, 2011

alg II
How do you solve this equation? 2cos(pi*x) = 4x = 5
June 15, 2011

geometry
Point P has coordinates of (-11,2) and the circle C has the equation of (x-1)squared + (y-2)squared = 36. How do I caculate Point A?
June 3, 2011

Math
you go to sunland don't you?
May 31, 2011

Chemistry
Is this is food calories?
May 25, 2011

Chemistry
Thank you so much!!! You're really a lifesaver!
May 25, 2011

Chemistry
Oh nevermind you put it there. THANK YOU SO MUCH! You're a huge help!!!
May 25, 2011

Chemistry
What's the constant for water though? Every time I look it up it's a different number
May 25, 2011

Chemistry
Calculate how much heat 32.0 g of water absorbs when it is heated from 26.0°C to 73.5°C. In joules, and then we have to calculate calories too, how is that done? I was absent. Thanks so much!
May 25, 2011

Chemistry
A 22.0 g piece of aluminum at 0.0°C is dropped into a beaker of water. The temperature of the water drops from 92.0°C to 77.0°C. What quantity of heat energy did the piece of aluminum absorb? Please Help, I'm so lost :( Thank you
May 25, 2011

Chemistry
THANK YOU!!!!!!
May 25, 2011

Spanish
Podemos alquilar dos peliculas I need to answer this using direct object pronouns.
May 22, 2011

Math
Hi, my name is Jane:). Math is my worst subject ever, so it surprised me how I'm in the advanced class! The teacher doesn't exactly explain things well and I'm not easily understanding the lessons. He told me if I don't turn in this packet we'll have ...
May 18, 2011

sociology
Hi This is my essay question Please can you read my essay below and critque it. "Durkheim argues that society is held together by sets of norms which are transmitted to us by social institutions like the family and schools, and that this process fundamentally shapes our ...
May 17, 2011

Sociology
Hi can someone help me I am battling to understand Durkheims concepts, I need to define his concepts and then intergrate it with one of my life experiences in education, religion and family.
May 16, 2011

math
how do you know that (x-2x)/(x+1) is a hyperbola? Thank you!
May 13, 2011

Sociology
Hi This is my essay question and I don't know how to start this essay I am not sure what is required of me, Please help. "Durkheim argues that society is held together by sets of norms which are transmitted to us by social institutions like the family and schools, and...
May 12, 2011

Geometry
2 equal circles in rectangle. if area of rectangle is 50 cm squared, wht is the radius in cm of each circle?
May 9, 2011

enhancing children's self esteem
5. Of the following who is the most important influence on children's self referent thought? a. Friends b. Teachers c. Themselves D FAMILY 6. Most often during adolescense, a child is least likely to approach which of the following for support of his or her self esteem a. ...
May 8, 2011

trig
ABC is rightangled triangle. AD is the bisector of angle BAC. Angle DAC=15 degrees. X=CD. Find X. I know the answer is 7.1 but do not know how to do the actual sum. Can you please help AB = 23 CM
May 5, 2011

trig
ABC is rightangled triangle. AD is the bisector of angle BAC. Angle DAC=15 degrees. X=CD. Find X. I know the answer is 7.1 but do not know how to do the actual sum. Can you please help.
May 5, 2011

maths
Trigonometry query. ABC is a rightangled triangle. AD is the bisector of angle BAC. Angle DAC = 15 degrees. X = CD. find X. I know the answer is 7.1 but cannot work out the theory. Could you please help? Thankyou.
May 5, 2011

calculus
Find or evaluate the following integral. csc^2 3x dx
May 4, 2011

psychology
The answer man's answers are definitely correct!! I kust took the test and got them all right.
May 4, 2011

chemistry
what is the reagent responsible for the formation of hydrogen sulfide?
May 4, 2011

Finance
midland chemcial is negotating a loan from manhattan bank and trust. the small chemical company needs to borrow 500,000. the bank offers a rate of 81/4 percent with a 20 percent compensating balance requirement, or as an alternative, 93/4 percent with additional fees of 5,500 ...
May 1, 2011

probability
Ryan spent a dollar on a Tri-State Megabucks ticket, enticed by a big jackpot. Ryan chose six different numbers from 1 to 40, inclusive, hoping that hey would be the same numbers draw later by lottery officials. Sad to say, none of Ryan's choices were drawn. What was the ...
April 30, 2011

math
Consider the cubic graph y = 3x^2 − x^3. (a) Write 3x^2 − x^3 in factored form. (b) Use this form to explain why the graph lies below the x-axis only when x > 3, and why the origin is therefore an extreme point on the graph. I mostly need help with what an ...
April 22, 2011

math
thank you! for part c I got 1-i but for part b, am I supposed to use the answer i got in part a to answer the question?
April 22, 2011

math
Express all the solutions to the following equations in a + bi form: (a) z^2 +2z+4 = 0 (b) z^3 −8 = 0 [Hint: z^3 −8 = (z−2)(z^2 +2z+4)] (c) 2z+iz = 3−i thank you!
April 22, 2011

precalculus
find an example of an even function f that has the addition property that f (x+15) is odd. Thanks
April 21, 2011

math
factor: 2x^3 - x^2 - 162x + 81 and could you show steps as well? thanks Thank you
April 21, 2011

math
factor: 2x^3 - x^2 - 162x + 81 and could you show steps as well? thanks Thank you
April 21, 2011

help!
find the POINT on the line 6x+7y-5=0 which is closest to the point (2,2)
April 20, 2011

optimization
The manager of a large apartment complex knows from experience that 110 units will be occupied if the rent is 322 dollars per month. A market survey suggests that, on the average, one additional unit will remain vacant for each 7 dollar increase in rent. Similarly, one ...
April 20, 2011

math
factor: 2x^3 - x^2 - 162x + 81 Thank you
April 19, 2011

calculus
find the point on the line 6x+7y-5=0 closest to (2,2)
April 18, 2011

Chemistry
How many moles of aluminum oxide can be produced from 12.8 moles of oxygen gas (O2) reacting with excess aluminun (Al)? useing this equation: ---- I don't get how to do these? 4Al(s) + 3O2--> 2Al2O3(s)
April 14, 2011

Chemistry
How many moles of silver nitrate are needed to produce 6.75 moles of copper nitrate (CU(NO3)2) upon reaction with excess copper by useing this equation: 2AgNO3(Aq) + Cu (s)-->2Ag(s)+Cu(NO3)2 (AQ)
April 14, 2011

Chemistry
How many grams of water will be produced if 32.0 g of nitrous oxide are also produced in the reaction? useing this equation: NH4NO3 (s)--> N2O (g) + 2H2O (g)
April 14, 2011

Chemistry
Use the equation to determine what volume of nitrous oxide can be produced from the decomposition of o.55 moles of ammonium nitrate useing the equation: NH4NO3 (s)--> N2O (g) + 2H2O (g)
April 14, 2011

chemistry
How many moles of carbon monoxide are needed to react completely with 1.75 moles of iron oxide? based on this equation: Fe2O3(s)+3CO(g)--->2Fe(s)+3CO2(g)
April 11, 2011

chem
1,3,5 will do it
April 9, 2011

Maths
The product of two positive consecutive odd numbers is 255. What are the numbers? Please write this problem in quadratic equation form please
April 5, 2011

chemistry
A gas mixture contains oxygen and argon at partial pressures of 0.60 atm and 425 mmhg. If nitrogen gas added to the sample increases the total pressure to 1250 torr, what is the partial pressure in torr?
April 3, 2011

chemistry
HOW MANY LITERS OF H2 must react to produce 75.0g of PH3
April 3, 2011

Stats
With technology, is it necessary to use one sample z test for large sample instead of binomial testing?
March 31, 2011

geometry
11.54cm
March 30, 2011

chemistry
according to this law ,as magnitude of chrages increases,what happens to the strength of attraction?
March 24, 2011

Chemistry
What makes Permanganate such a good oxidizing agent?
March 23, 2011

Material Science
1).Does more grain boundaries result in a higher ultimate tensile strength? 2).Does an increase in stiffness of a material result in a higher modulus?
March 22, 2011

Science
If you were to move the load by applying force from the top, what kind of machine might be the most appropriate to lift the load 5 cm?
March 21, 2011

alg I
Yellow, green, and red chips are placed in a bag. The odds against pulling a green chip are 2/5. What is the probability of pulling a green chip?
March 20, 2011

Physics
Two sounds have measured intensities of I1 = 100 W/m2 and I2 = 300 W/m2. By how many decibels is the level of sound 1 lower than that of sound 2?
March 19, 2011

alegebra
a 210 ft. long rope is cut into 3 pieces. the first piece of rope is 3 times as long as the second rope. the 3rd piece of rope is 2 times as long as the second piece of rope. What is the lenght of the longest piece of rope?
March 18, 2011

geometry
The diagnol of a rectangle is 20 inches. The width is 4 inches shorter than its length.
March 15, 2011

Microeconomic
my answer would be A
March 11, 2011

Microeconomic
If your marginal utility from your last session with your personal trainer is equal to the price she charged you, then: Thank you-Jane
March 11, 2011

maths
Facrt
March 8, 2011

maths
Need help to know what to do: solve the equation 9/(x=7)=4/(x-3) My book tells me to cross multiply, then move all the terms in x and the terms without x on separate sides of the equation. then divide by the coefficient of x. How do i do this? I don't understnd it what ...
March 8, 2011

geometry
Julian is interested in building a new house. Three architects have given him plans. The first plan is for a house that will be 2,250 square feet. The total cost of the house will be \$281,250. The second plan is for a house that will be 2,400 square feet. The total cost of the...
March 7, 2011

chemistry
Determine how many milliliters of 0.102M NaOH solution is needed to neutralize 35.0mL of 0.125M H2 SO4 solution.
March 1, 2011

science
what is the human life cycle
March 1, 2011

physics
Calculate the gravitational force between the Sun and Neptune. The mass of the Sun is 1.99×1030 kg. The mass of Neptune is 1020×1023 kg. The distance between them is 450×1010 m.
February 26, 2011

physics
I am confused because the answer should be in mi/s.
February 26, 2011

Physics
A rod with cross-sectional area A and length L is made from a material with a Young's modulus of Y. This rod could be considered an extremely stiff spring with some spring constant k. Find an expression for k in terms of the other quantities.
February 25, 2011

Maths
circumference = 2 * pi * r = 2 * 22/7 * 7 = 44 cm 1 km = 1,00,000 cm 44 km = 44,00,000 cm revolutions to be made = 44,00,000/44 = 1,00,000
February 23, 2011

Ethics
thanks
February 22, 2011

Ethics
What moral is the fondness of war related to? I'm trying to sum it up in a concise phrase or word but I can't think of the right one. Ambitiousness? Belligerent? Thanks
February 22, 2011

precalculus
oops! i mean HYPERBOLA FORM
February 21, 2011

precalculus
Hi does anyone know how to solve this equation into parabola form? thanks x^2 + 2xy +3y^2 = 9
February 21, 2011