benjamin
Popular questions and responses by benjamin
Calculus
Find a cubic function f(x) = ax^3 + bx^2 + cx + d that has a local maximum value of 3 at x = −2 and a local minimum value of 0 at x = 1.
asked on November 12, 2012 
physics(kinematics)
A police officer in a patrol car parked in a 70 Km/h speed zone observes a passing automobile might be intoxicated,the officer starts his car,accelerates uniformly to 90 Km/h in 8s ,and maintaining a constant velocity of 90 Km/h,overtakes the motorist 42s
asked on July 31, 2015 
physics
Vector A has a magnitude of 8.00 units and makes an angle of 45.0° with the positive xaxis. Vector B also has a magnitude of 8.00 units and is directed along the negative xaxis. Using graphical methods, find (a) the vector sum A + B and (b) the vector
asked on August 28, 2009 
CHEM, HELP!!
1. If the energy of a photon is 1.32 × 10^18 J, what is its wavelength in nm? 2. The energy of an electron in the hydrogen atom is determined by what?
asked on October 5, 2014 
physics(capacitors)
A sheet of paper 40mm wide and (1.5 x 10^2) thick is placed between a metal foil of the same width is used to make a 2.0 UF capacitor. If the dielctric constant(relative permitivity of the paper is 2.5 ,what length of paper is required?
asked on July 25, 2015 
maths
The area of a rectangle is 60 cm squared and its perimeter is 38cm. Find the length and width of a lectangle
asked on May 27, 2016 
Math
A fence is to be built to enclose a rectangular area of 310 square feet. The fence along three sides is to be made of material that costs 3 dollars per foot, and the material for the fourth side costs 14 dollars per foot. Find the dimensions of the
asked on December 11, 2014 
Stats
A sociology professor assigns letter grades on a test according to the following scheme. A: Top 14% of scores B: scores below the top 14% and above the bottom 55% C: scores below the top 45% and above the bottom 17% D: scores below the top 83% and above
asked on October 14, 2017 
Maths
the second term of a GP is 36 more than the first term. The difference between the 4th and the 3rd terms is 900. Calculate the common ratio and the first term of the GP
asked on January 25, 2017 
physics(lens)
Two converging lenses, A and B,with focal length F1=20cm and F2=25cm,are placed 80cm apart. An object is placed F0cm in front of the first lens. 1)Determine the position of the final image formed by the magnification of the two lenses. 2)Determine the
asked on August 26, 2015 
Physics
A typical photovoltaic cell delivers 4.2×10−3 W of electric energy when illuminated with 0.15 W of light energy. What is the efficiency of the cell?
asked on October 12, 2017 
physics(lens)
Two converging lenses, A and B,with focal length F1=20cm and F2=25cm,are placed 80cm apart. An object is placed F0cm in front of the first lens. 1)Determine the position of the final image formed by the magnification of the two lenses. 2)Determine the
asked on August 26, 2015 
physics
What gravitational force does the moon produce on the Earth if their centers are 3.88x108 m apart and the moon has a mass of 7.34x1022 kg? earths mass: 5.972 × 10^24 kg
asked on May 5, 2020 
math
Sound travels at 343 meters per second. You measured 3 seconds for sound travel from place A to place B. What is the distance between A and B?
asked on January 8, 2019 
Geometry
On a coordinate grid map jaff's house is located at (9,5.). Hannah's house is at (5,5). Kenya's house is at the midpoint between Jeff and Hannah's. what's the distance.
asked on April 28, 2017 
Chemistry
For the reaction of 2 HCl + Na2CO3 > H2O + CO2 + 2 NaCl, how can I visually identify the limiting reagent, without any calculations? If I have a very high percent yield, what would be a good reason for it, considering that the HCl was diluted to 0.050 L
asked on January 18, 2017 
Physics
Plz, i need the workings. An object is acted upon by two forces of 5N and 12N. Calculate the resultant of two forces if the forces acting perpendicular to each other
asked on October 3, 2015 
science
two parallel plates are separated by a dielectric of thickness 2mm and a dielectric of constant 6.if the area of each plate is 40cm2 and p.d between them is 1.5kv,find the capacitance,the energy stored by the capacitor and the ratio of the capacitance if
asked on October 10, 2014 
Satistics
In North American, female adult heights are approximately normal with a mean of 65 inches and a standard deviation of 3.5 inches. a.) If one female is selected at Random, what is the probablility that shes has a height 70 inches or higher? b.) The heights
asked on November 14, 2010 
History
About the French Revolution. You are a member of the Third Estate. Prepare a speech for the meeting of the Estates General, explaining all your problems. Minimum 300 words
asked on January 21, 2009 
physics
How far from the earth’s surface would a 72.1kg person experience a force of1.6 Newtons?
asked on May 5, 2020 
Physics
A girl throws a marshmallow that lands in her friend’s mouth 2 m away. The girl threw the marshmallow at an angle of 30 degrees. How hard did she throw the marshmallow?
asked on September 26, 2019 
Physics
A tennis ball is dropped from 1.98 m above the ground. It rebounds to a height of 1.05 m. With what velocity does it hit the ground? The acceleration of gravity is 9.8 m/s2 . (Let down be negative.) Answer in units of m/s Confused please help.
asked on September 25, 2019 
Math
The radii and angle substended at the center of circle are given as follow 12cm,40
asked on September 9, 2019 
Math
Mr. Anderson has a rectangular yard that is 27 yards long and 25 feet wide. How many square feet of grass must Mr. Anderson mow?
asked on July 9, 2019 
Chemistry
An 0.850 g sample of a mixture of LiH and CaH2 was reacted with H2O and the H2 gas produced, 1.20 L, was collected at STP. What mass % of the original mixture was LiH?
asked on November 6, 2017 
Math
One day at 3 am., the temperature was 13 Fahrenheit in Kodiak, Alaska. At 10 am the temperature was 22 Fahrenheit What was the average change in temperature per hour?
asked on April 11, 2017 
Chemistry
In this reaction: 2 HCl + Na2CO3 > H2O + CO2 + 2 NaCl The HCl was diluted from 2M to 0.8M and I currently have 0.020 L of it. There is also Na2CO3. What would be four causes for a large error percentage? Is it possible that some of the HCl evaporated?
asked on January 19, 2017 
precalculus
How do you find the major and minor axis of an ellipse?
asked on December 5, 2016 
precalculus
can you explain what the equation y = a(x  h)2 + k, a ≠ 0 means and what it represents?
asked on December 5, 2016 
Algebra
Your test scores in one class are 8484 and 88. What possible scores can you earn on your next test to have a test average between 86 and 90, inclusive
asked on September 16, 2016 
Math
If q^1/2 = x, x^1/4 = 4^1/2, what is the value of q? Plz help me!
asked on July 19, 2016 
Physics
A uniform rod 2m long has a force 80N applied downward at one end. Another force 6N applied downward at the other end. At what point under the rod should the pivot be placed to keep it in equillibrim?
asked on May 5, 2016 
engineering
important of ict in electrical studies
asked on April 28, 2016 
Math algebra
If a mixture calls for 3 cups of flour to 2 cups of water. Then how much water is needed for only 2 cups flour??
asked on April 2, 2016 
business math
out of 7 men and 5 women, 5 members of a committee are selected. in how many ways can this be done if (a) there must be exactly 3 men (b) there must be more women than men?
asked on February 28, 2016 
Statistics
90% of population is unemployed. Assume 10 employable people are to be selected randomly. what is the expected number of those unemployed.
asked on December 16, 2015 
physics(measurement)
What accurate method can be used to determine the thickness of a coin. Explain pls..
asked on August 26, 2015 
physics
a cell of emf 10v and internal resistance 2ohms is connected in series with an ammeter resistance 0.5ohms and a load of resistance 7ohms. Calculate (A) the potential difference across its terminal (B)the voltage drop
asked on May 21, 2015 
science
suppose 125g of ethanol at 25C is mixed with 255g of ethanol at 84C at constant atmospheric pressure in a thermally insulated vessel. What is the Ssys for the process. The specific heat capacity for ethanol is 2.42 J/g K. Answer in units of J/K
asked on October 11, 2014 
science
A point charge of 0.5C is brought from infinity to a point A in free space.how much work is required to this?
asked on October 10, 2014 
Community technical college
Given that 1st term of an A.P is 7 and it's 10th term is twice the second term,calculate the (a) 19th term (b)sum of 28 terms (c) difference between 9th and 6th terms
asked on February 3, 2013 
math
if i ride my bike for 5.22 km and my whell turns 1.45 m how many times will it rotat
asked on November 22, 2012 
geometry
i have to proof that segment ad is congruent to segment ce. my givens are that segment ab is congruent to cb, that fd bisects ab and that fe bisects cb. the shape is a triangle
asked on September 26, 2012 
collage math
what is the difference of two cubes
asked on July 15, 2012 
university of phoenix
if someone scored two standard deviations above the mean on a standard test where the mean =100 and the standard deviation = 15, what is the person's numerical score?
asked on July 13, 2012 
Algebra
What do I do if a compound inequality contradicts itself? Do I put down empty set, or what?
asked on March 22, 2012 
math
Find the angles of atriangle which are in the ratio 2:3:5. Could someone explain how to do this also. Thanks.
asked on November 22, 2011 
ISB
Find the angles of atriangle which are in the ratio 2:3:5. Could someone explain how to do this also. Thnaks.
asked on November 22, 2011 
math
In a right angle triangle, two acute angles are in the ratio 2:3. Find the angles?
asked on November 22, 2011 
English
I was wondering what you all may think about video games and their effects on children playing them? Are the children becoming more violent? What do these games do t a child's psyche?
asked on November 9, 2011 
Physics
An airplane, traveling 90 degrees, at 100 meters per second is blown towards 180 degrees at 50 meters per second. What is the resultant velocity and direction?
asked on September 8, 2011 
Math
Find the difference of all the prime numbers between10 and25 arranged in descending and ascending order.Give your answer in words.
asked on August 9, 2011 
math
Find the GCD OF 121, 151 And 211
asked on August 9, 2011 
Math (difficult)
The value of a new car purchased for $28,000 decreases 8% per year. Write an exponential decay model for the value of the car. Use the model to estimate the value after 5 years.
asked on April 30, 2011 
algebra II
Using the given equations, find the point of intersection. 6x  2y = 5 and 3x  y = 10
asked on March 16, 2011 
college HIST
The Age of Jackson is often seen as a turning point in American politics, one where we turn from a politics where few could vote or hold office to one where many could. Define Jacksonian Democracy and show how it changed the political system from what came
asked on March 7, 2011 
geometry
to the nearest integer how long is the diagonal square with the side of 12
asked on February 13, 2011 
Form1/9th grade
A mixture contains solids: Aluminium,camphor and sugar.Explain how you would obtain a sample of solid sugar from the mixture.
asked on November 30, 2010 
Algebra
There is a table of values for the function f. They read: x=3, f(x)=4 x=4 f(x)=5 x=5 f(x)=6 x=6 f(x)=3 x=7 f(x)=5 x=8 f(x)=7 What is the value of 2f(5)f(4)? I did this wrong obviously, but what I did was figure out the function of five from the table (4),
asked on November 25, 2010 
algebra
Militsa has 4 times as many nickels as dimes. Their total value is $8.10. How many of each coin does she have
asked on May 17, 2009 
Music
What is the Mongolian equivalent to the guitar called? I've searched under Mongolian instrument lists, but I couldn't find it. Thanks!
asked on March 26, 2009 
Misc./Project/Art
Hello, I need to come up with a very creative way to express who I am to a certain group of people. Unfortunately, I'm not very good at art, so I would have to come up with a new way. Are there any ideas you might have? Thank you very much for your help.
asked on October 5, 2008

physics
correction: 7.34x10^22 kg
posted on May 5, 2020 
math
Why don't you guys actually put the answer with the question that's more better. I like your web but you can make it more better and I will tell lots of people about this not trying to cause trouble. But please put the answer with the question it will help
posted on March 17, 2020 
French
Evans
posted on December 2, 2019 
French
Juvila
posted on December 2, 2019 
algebra
I would be scared tbh...
posted on September 25, 2019 
Science
I'm sorry if im too late for this question but the correct answer i think is A) The couch will move to the left with a force of 1 N
posted on March 4, 2019 
math
PLZ HELP I NEED IT
posted on January 8, 2019 
Chemistry
Thanks so much fam... youre a life saver
posted on October 15, 2018 
Stem
1.70
posted on November 28, 2017 
english
hosted scolded called punted pressed landed stamped bumped honked dented crunched winked spelled thrilled mended trashed twisted banged
posted on October 17, 2017 
math
tanA=opposite÷adjacent Adjacent=opposite÷tanA =180×tan27 =91.715cm Therefore length of his shadow is 91.715cm
posted on August 2, 2017 
math
665,830 my answer
posted on June 8, 2017 
social studies
THANK YOU GUYS SO MUCH. YEE. YOU ARE THE BEST
posted on May 25, 2017 
Math
Thank you Ms. Sue! :)
posted on April 11, 2017 
Math
So what I'm getting is: 22 + 13 = 35 35 ÷ 7 = 5 degrees per hour Is this correct?
posted on April 11, 2017 
math
A tomato plant has grown 5 inches over the last 9 days at this rate how many inches will it grow over the next 15 days
posted on January 18, 2017 
Math, Geometry and Physics
less than 270m or more than 3480m.
posted on October 18, 2016 
Chemistry
I don't knw it. Buh pls m interested In d solution
posted on October 15, 2016 
biology
assignment
posted on August 10, 2016 
maths
15
posted on May 27, 2016 
English
As a young girl growing up in Africa, the narrator came into contact with many native Africans. Those who found themselves in the employ of her family were the fortunate ones, she believed. While she acknowledged that they exist, the narrator took for
posted on May 19, 2016 
physics
Coefficient of friction=F/R=ma/mg=a/g Coefficient of friction of rubber on dry concrete=0.6>>0.85 So to make it accurate coefficient=0.75 0.75=a/10 a=7.5m/s^2 Recall that.. v^2=u^2+2as v^2=0^2+2×7.5×30 v^2=450 v=√450 v=21.2m/s (b)coefficient of
posted on April 20, 2016 
Physics
Coefficient of kinetic friction =F/R=ma/mg Which is a/g since the mass is equal 0.64=a/10 a=6.4m/s NB. g=10m/s Recall v=u+at V=15+6.4×2 V15=12.8 V=12.8+15 V=27.8m/s
posted on April 20, 2016 
Calculus
t is greater than 0.5, not 2
posted on February 19, 2016 
physics
For the velocity remember that the work done on the ice by the spring is calculated as the change in Kinetic Energy of the block or: Work = (1/2)mass*velocity(final)^2  (1/2)mass*velocity(initial)^2 Plug in your Work answer from part a and substitute into
posted on October 12, 2015 
physics(measurement)
Thank you.
posted on August 26, 2015 
Medical Coding 2
Answer I came up for Ilsa and Anonymous is 943.29 (multiple, because it's both arms) E924.8 (where: otherburning by: hot object NOS) E849.0 (where) E015.2 (activity) E000.8 (who) 99251 (inpatient  hospitalbased clinic) 16030 (large dressing change)
posted on May 6, 2015 
medical Coding
my take on it is: 972.9, E950.4, E000.8, E849.7, 99281, 96365, 96366x2, J1610x20, J7070
posted on May 6, 2015 
physics
hysics  Joy, Friday, June 14, 2013 at 6:14pm 1.a2.b3.c4.a5.c6.c7.c8.a9.a10.c11.c12.d13.b14:a15.d16.c17.b18.c19:d20:b.
posted on March 18, 2015 
physics
3.3m/s
posted on March 18, 2015 
Accounting
12,069
posted on July 26, 2014 
Math
What is the maximum height reached by the ball? If a baseball is projected upward from ground level with an initial velocity of 64 feet per second, then its height is a function of time, given by s= 16t^2 + 64t
posted on April 24, 2013 
algebra with pizazz pg 40 riddle
I need help with problem E: 2v + 18 = 16  4(v + 7)
posted on January 24, 2013 
3rd grade math
Just multiply 8 and 5 you will get 40 when you add two zeros you get 4000.Check your answer on paper, If you wish to
posted on November 30, 2011 
English
Thank you, your responses helped my very much.
posted on November 9, 2011 
Really bad interpreter
I think it means that the american people like doing things in a very simple manner and don't like to make such a big deal over anything to avoid confusion or problems. They rather be straight forward with one another than lying and tricking people in
posted on March 7, 2011 
4th grade math
That is not 4th grade homework
posted on February 2, 2011