vince
Most popular questions and responses by vince
Math
At Harry's Discount Hardware everything is sold for 20% less than the price marked. If Harry buys tool kits for $80, what price should he mark them if he wants to make a 20% profit on his cost?
asked on July 4, 2010 
Chemistry
1) A quantity of 85 mL of .900 M HCl is mixed with 85 mL of .900 M KOH in a constantpressure calorimeter that has a heat capacity of 325 J/C. If the initial temperatures of both solutions are the same at 18.24 degrees C, what is the final temperature of
asked on November 18, 2014 
Math
The scale of map is 1:20000. Find the area on the map which represents 124km^2
asked on June 3, 2010 
Chemistry
0.000333 g fluorescein (332.32 g/mol) is dissolved in 225 mL solution of ethanol. The density of ethanol is 0.785 g/mL. What is the concentration of the solution in molarity (M)? How many ppm? I already know that the molarity is 4.45E6. I just need help
asked on July 16, 2012 
Chem
40. If 12.0 gram of O2 is required to inflate a balloon to a certain size at 27 degrees C, what mass of O2 is required to inflate it to the same size and pressure at 81 deg C?
asked on March 14, 2013 
chemistry
What temperature is required to produce a carbon dioxide partial pressure of 1.0 ? BaCO3¡êBaO + CO2
asked on March 19, 2011 
Math/Solve
ABC phone company charges $17 per month plus $0.03 per minute of phone calls. XYZ phone company charges $8 per month plus $0.06 per minute of phone calls. How many minutes of phone calls in a month make XYZ phone company a better deal?
asked on February 26, 2015 
Chemistry
How many moles are contained in 1.20 x 1024 molecules CO2?
asked on October 2, 2013 
MATH
What is the standard deviation of the following data? If necessary, round your answer to two decimal places. 46, 53, 38, 67, 46, 57, 61, 42, 63, 55, 46
asked on June 7, 2011 
MATH
A bag has 4 green marbles, 3 red marbles, and 3 yellow marbles. What is the probability that you pick a yellow marble, do not replace it, and pick another yellow marble?
asked on June 7, 2011 
Math
A bag holds 2 yellow, 1 green, and 2 red marbles. If you were to draw a marble from the bag 150 times, and replace it after each draw, how many yellow marbles would you expect to draw? (1 point) A:50 B:60 C:30 D:38 I say it's B or A
asked on April 4, 2013 
Physics
A 39.0 kg box initially at rest is pushed 4.50 m along a rough, horizontal floor with a constant applied horizontal force of 135 N. If the coefficient of friction between box and floor is 0.300, find the following. (a) the work done by the applied force J
asked on April 28, 2013 
College Algebra
Carbon14 Dating. Only 10% of the carbon14 in a samll wooden bowl remains. How old is the bowl? Half life of carbon is 5700 years.
asked on December 8, 2010 
Physics
A water slide is constructed so that swimmers, starting from rest at the top of the slide, leave the end of the slide traveling horizontally. One person hits the water 5.00 m from the end of the slide in a time of 1.000 s after leaving the slide. Ignoring
asked on October 26, 2009 
physics
four forces 8N,6n,2n and 4n act on a point O in the directions north,east,south and west respectively,find the magnitude of their result and the direction of their resultant force.
asked on February 25, 2016 
math word problem
"Adult tickets are $6, Kids are $3. If the total sales are $585, but only 120 tickets were sold, how many adult tickets were sold? If this was 130 it would be easy: $3+$6 =$9; $585/$9 = 65 tickets. The problem is the question specifies 120 tickets.
asked on March 25, 2013 
gen Chem
I've attempted this problem but not sure if i'm on the right track. Use the enthalpy diagram provided above and apply Hess’s Law to determine the standard enthalpy of formation for C12O36H20N12 (s) using the results from part (a) and the following
asked on October 26, 2010 
Chemistry
How much 2 M KOH must be added to 0.5 L of 0.2 M glycine at pH 8 to bring its pH exactly to 10?
asked on February 8, 2013 
MATH
A bag has 5 red marbles, 6 blue marbles and 4 black marbles. What is the probability of picking a blue marble, replacing it, and then picking a black marble?
asked on June 7, 2011 
MATH
Triangle DEF is similar to triangle PQR. Side DE measures 3, side EF measures 7 and side FD measures 9. Side PQ measures 5x – 25 and side QR measures 6x + 4. Find the value of x.
asked on June 7, 2011 
math
need help with math word problems. just don't understand. What is the number? you have a four digit number where the thousands digit is four greater than the hundreds digit.The tens digit is twice the thousands digit. The ones digit is half of the
asked on March 8, 2007 
Chemistry/Elements
What is needed to have Nitrogen and Lithium react?
asked on March 17, 2011 
math
For small values of h, the function (16+h)^1/4 is best approximately by which of the following? a. 4+h/32 b. 2+h/32 c. h/32 d. 4h/32 e. 2h/32
asked on December 31, 2011 
Math
A mother is 21 years older than her new born daughter. How old will the daughter be when her age is 1/4 of her mother's?
asked on May 27, 2010 
algebra 2
Boat builders share an old rule of thumb for sailboats. The maximum speed 𝐾 in knots is 1.35 times the square root of the length 𝐿 in feet of the boat’s waterline. If a customer is planning on ordering a sailboat with a maximum speed of 8 knots how
asked on May 1, 2015 
MATH
What is the equation of the parabola with a directrix at y = 4 and focus (0, 4).
asked on June 7, 2011 
Math
Mary's age is 2/3 that of peter's. Two years ago Mary's age was 1/2 of what Peter's age will be in 5 year's time. How old is peter now?
asked on May 31, 2010 
Chemistry
Q: How is boiling different from sublimation?
asked on May 19, 2010 
6th grade math
I still do not understand this problem? find a number such that when added to the numerator and denominator of 2/11 yields a fraction equivalent to 1/2? thanks If you add 7 to the numerator and 7 to the denominator you get 9/18. 9/18= 9x1/9x2 = 1/2 It
asked on March 8, 2007 
Geometry
A 40lb child is sitting at A(2,3) and a 30lb child is at B(12,7) where units are feet. Find the point P between A and B which could be used as the fulcrum of a teeterboard putting the two children in equilibrium(Hint:40AP=30PB)
asked on July 31, 2016 
math
a total of $5000 is invested at 2%, 3%, and 4%. the amount invested at 4% is equal to 2% and 3% combined together. the total interest gained for 1 year is $145. find the amount invested at each rate.
asked on February 10, 2015 
algeb collage
solve the inequality,express using interval notation x35x214x>0
asked on September 26, 2007 
Math
On an automobile assembly line, every third car is green. Every fourth car is a convertible. a) How many cars are out of the first 100 will be convertibles? b) Which number of car is First Green convertibles? Grade 7 Math Please answer, ASAP.
asked on September 8, 2016 
math/ratio tables
A girl runs 50 miles in 60 minutes. At this rate,how long would it take her to run 15 miles?
asked on August 31, 2015 
Math
I need help. So supposed that you have three diffrent lenghts of linking cubes as shown below . ( 5 blacks, 3 whites 2, reds) Assume that you have as many of these lengths as you need, but you may not take them apart. a) 25 d) 29 b) 20 e) 30 c) 18 f) 32
asked on September 7, 2016 
EASY GRAPHING QUESTION
Write the equation of a circle with a center at (2.5, –3.5) and a radius of 1.2.
asked on June 7, 2011 
math
it is cross math (like sudouk) six rows across and six rows down 1st row has empty box, +, empty box, + box =6 this row is across 2nd row has x blacked out box, +, blacked out box, x, blacked out box this row is across 3rd row across is empty box, +, empty
asked on March 12, 2007 
Geometry
Find the equation of the circle which is concentric with the circle x^2+y^2+3y8y+16=0 and tangent to the line 4x+3y12=0. Show your solution.
asked on August 31, 2016 
finance
Thompson stores is considering a project that has the following cash flow data. What is the project's IRR. Note that a project's projected IRR can be less than the WACC and even negative, in which case it wll be rejected. Year 0 ($1,000), year 1 $300, year
asked on February 6, 2010 
Calc
Air is being pumped into a spherical balloon so that its volume increases at a rate of 90{cm}^3/s. How fast is the surface area of the balloon increasing when its radius is 7{cm}? Recall that a ball of radius r has volume \displaystyle V={4}/{3}pie r^3 and
asked on March 15, 2009 
matn
need help with word problem? half add it Find a number such that when added to numerator and denominator of 2/11 yields a fraction equivalent to 1/2? thanks for any help (x+2)/(x+11) = 1/2 x is the number you want. Now do the algebra. I will be happy to
asked on March 8, 2007 
physics
A boy throws a ball at 5.5 m/s at an angle of 25.4° above the horizontal off a cliff which is 70.8 m high. What angle does the velocity of the ball make with the horizontal 0.78 s after the throw? (make the angle positive if the angle is above the
asked on December 6, 2012 
EASY GRAPHING QUESTION
Write the equation of a circle with a center at (15, –35) and a diameter of 100.
asked on June 7, 2011 
THIS IS AN EASY QUESTION!!!
(too bad I don't know how to solve it!) How many different ways can the letters in the word “square” be arranged?
asked on June 7, 2011 
health
In terms of decsion making sequences, how would you explain and describe : A. The 25yearold, healthy worker who sees that sam physician for minor medial needs?
asked on April 5, 2010 
precal
tan((theta/2)+(pi/6))=1
asked on July 2, 2011 
Math
A square of area 2 is inscribed in a circle. What is the area of the circle?
asked on July 7, 2010 
Computer Science
What do you understand by life cycle of software development? Explain briefly the various stages of software development lifecycle.
asked on May 25, 2010 
Computer Science
What do you understand by life cycle of software development? Explain briefly the various stages of software development lifecycle.
asked on May 25, 2010 
Math
how would i express the following fraction with a single denominator e4/5 +1
asked on May 22, 2010 
math
x^36x^2>0 answer in interval notation
asked on September 26, 2007 
math
sketch the graph of the linear function passing through (6,5) and (6,3)
asked on August 3, 2014 
EASY MATH
Write the equation of a hyperbola with a center at (5, 3), vertices at (5, 5) and (5, 1) and covertices at (11, 3) and (1, 3).
asked on June 7, 2011 
MATH
A bag has 4 green marbles, 3 red marbles, and 3 yellow marbles. What is the probability that you pick a yellow marble, do not replace it, and pick a red marble?
asked on June 7, 2011 
Math
A bag has 4 green marbles, 3 red marbles, and 3 yellow marbles. What is the probability that you pick a yellow marble, do not replace it, and pick a red marble?
asked on June 7, 2011 
science
how do bacterial plasmids relate to resistance and how do they relate to genetic engineering. i am very stuck and i need help please
asked on October 17, 2010 
Computer Science
What is a database management system? What are it's advantages over conventional file processing system?
asked on June 1, 2010 
Physics
Why does a rubbed balloon stick to the wall?
asked on May 27, 2010 
Math
How would I make z the subject of the formulae: x=y(zy)/z
asked on May 27, 2010 
Computer Science
What do you understand by life cycle of software development? Explain briefly the various stages of software development lifecycle.
asked on May 25, 2010 
IGCSE
Is it possible to take igcse examinations in America?
asked on May 16, 2010 
Math!
A rectangle is 15cm x 12cm. If the length is reduced by R cm and its width is increased by R cm. Its area is reduced by 4cm^2.
asked on August 23, 2008 
Precalculus
please write an equation in standard x^2y^22x+4y7=0 * standard form *center *vertices *foci *asymptotes Thankyou you
asked on December 3, 2014 
Math
Function rule for x=1,2,3,4 & y=7,7,9,11
asked on April 26, 2012 
EASY MATH QUESTION
What is the probability of rolling a 1, 2, 4, 5, or 6 on a six sided dice? MAKE SURE TO READ THE QUESTION CAREFULLY!
asked on June 7, 2011 
Math
The scale of map is 1:20000. Find the area on the map which represents 124km^2
asked on June 2, 2010 
Math
How do I solve this equation 3d81d^2=0
asked on May 19, 2010 
Math
How do I solve this simultaneous equation 3x2y=5 (1) 2y5x=9 (2) I managed to find the value of x and that is 7 but I am having problems to substitute it's value in equation (1)
asked on May 16, 2010 
Calc II
1) Find the point on the graph of y=x^2 where the cube has slope 5/2 2) Find the point on the graph of y=x^2 where the tangent line is parallel to the line 4x+3y=3
asked on January 29, 2015 
science
for every cubic meter of 30 degrees celsius saturated coded to 16 degrees celsius fowmany grams lost
asked on January 27, 2015 
psychology
Can the expression on your face produce the emotion which you would like to experience? Explain.  I believe that expression on ourface produce the emotion which we would like to experence. right? even though we are sad inside we tend to be happy. and
asked on April 29, 2012 
MATH
Write the equation of a parabola with a vertex at (5, 2) and a directrix y = 1.
asked on June 7, 2011 
11th grade
how do bacterial plasmids relate to resistance and how do they relate to genetic engineering. i am very syuck and i need help please
asked on October 17, 2010 
Math
How do I solve this equation 7x^3+21x^2=0
asked on May 19, 2010 
Chemistry
Q: How is melting different from evaporation?
asked on May 19, 2010 
History
Where can i find info on china and japan during 18th to 19th century.
asked on May 10, 2010 
math
x^36x^2>0 anser in interval notation
asked on September 26, 2007 
math
x^36x^2>0 anser in interval notation
asked on September 26, 2007 
math
write the following as a rate in lowest terms $402 for 18 rolls of film To find the rate for one roll of film, divide $402 by 18.
asked on August 21, 2007 
MAth
The wilkinson family drove 1.374 miles in 9 days.how many miles did they drive on last day
asked on July 3, 2016 
History
What limits on national powers can be derived from the tenth amendment?
asked on February 19, 2013 
science
What is blood made of?
asked on June 14, 2010 
business
What are the benefits associated with quality awards!? please could someone help me! cheers!
asked on January 28, 2008 
Math
How do I solve this equation 4n^225=0
asked on April 30, 2010 
English
I have to write a paper on the PseudoModern movement and how it relates to movie, music, artwork, an article, and a 21st century. I can't find an example for each of these cases.
asked on May 17, 2009 
science
how much water does the usa use yearly
asked on October 1, 2007

Physics
69
posted on November 19, 2018 
Dudas
Hi guys ULOL
posted on November 19, 2018 
Dudas
Tanga ako
posted on November 19, 2018 
American government
Collective
posted on December 16, 2017 
Chemistry
P=(3.0/6.0) x (250/350) 1.5 .53
posted on February 12, 2017 
Math
Thanks Ms.Sue
posted on September 8, 2016 
Math
pls answer as soon as posible.
posted on September 7, 2016 
calc
just believe in god
posted on August 31, 2016 
ALgebra
80
posted on May 14, 2016 
chemistry
Anna's answer is wrong. 241 L is the correct answer.
posted on October 20, 2015 
algebra 2
Thanks for not answer my question though :) really appreciate it
posted on May 5, 2015 
algebra 2
I am only Bill and Vince not the other ones
posted on May 1, 2015 
Math/Solve
i was able to figure it out 0.06m +8
posted on February 26, 2015 
math
no sir im pretty sure i typed it correctly from what my professor gave me. i also got 500 but it seems wrong so i went here. thank you so much for taking time and answering my question :)
posted on February 10, 2015