johnathan
Popular questions and responses by johnathan
Calculus
find y'' if x^4+y^4=16
asked on February 16, 2012 
social studies
what was the purpose of the freedmen's bureau?
asked on February 13, 2018 
Chemistry
Describe in detail how you would make 1.25 of 0.125 M potassium permanganate solution. I think you have to set up an equation for molarity but I'm not sure. Please help.
asked on October 15, 2016 
physics
Two people take identical jet skis across a river, traveling at the same speed relative to the water. Jet ski A heads directly across the river and is carried downstream by the current before reaching the opposite shore. Jet ski B travels in a direction
asked on September 10, 2014 
Statistics
A genetic trait is inherited in such a way that for a father with the trait, his male offspring have a 25% chance of inheriting it but his female offspring cannot inherit it. Suppose that in a certain population, 40% of offspring are male and offspring
asked on September 16, 2017 
Statistics
3. A researcher wanted to study the effect of low light environments on the growth of alfalfa plants, so she grew six plants and measured their heights after two weeks. She calculated a sample mean of 5.2 cm with a standard deviation of 1.1 cm. If the
asked on September 10, 2017 
Math
1. As the geese are sitting in a row on their feeder, the first goose eats m kernels of cracked corn. Each goose in the row then eats 1 less than twice the number of kernels eaten by the previous goose. Which of the numbered choices expresses the total
asked on January 7, 2016 
Physic II
A small glass bead that has been charged to 4.4 nC? What is the strength of the electric field 2.0 cm from the center of the bead? Please show all work
asked on January 26, 2014 
physics
A circular coil (980 turns, radius = 0.078 m) is rotating in a uniform magnetic field. At t = 0 s, the normal to the coil is perpendicular to the magnetic field. At t = 0.027 s, the normal makes an angle of 45o with the field because the coil has made
asked on November 23, 2012 
us history
What was the role of Social Darwinism in American imperialism? Are there implications of race underneath a belief in Social Darwinism?
asked on January 30, 2011 
chemistry
Taking note of the equilibrium 4HCl(g) + O2(g) > 2H2(g) + 2Cl2(g). What would be the the equilibrium law expression for the balanced chemical equation?
asked on May 25, 2008 
Statistics
A common blood test performed on pregnant women to screen for chromosome abnormalities in the fetus measures the human chorionic gonadotropin (hCG) hormone. Suppose that in a given population, 6% of fetuses have a chromosome abnormality. The test correctly
asked on September 25, 2017 
Statistics
A common blood test performed on pregnant women to screen for chromosome abnormalities in the fetus measures the human chorionic gonadotropin (hCG) hormone. Suppose that in a given population, 6% of fetuses have a chromosome abnormality. The test correctly
asked on September 24, 2017 
Physics
An airplane flies at airspeed (relative to the air) of 250 km/h . The pilot wishes to fly due North (relative to the ground) but there is a 65 km/h wind blowing Southwest (direction 225◦ ). In what direction should the pilot head the plane (measured
asked on September 16, 2017 
Math
1. Two of the risers are shown at the right. Find the length of the longest side of these triangular risers. cong1 2. Rope lighting is to be placed around the outer edge of these risers. Find the number of feet of rope lighting needed for both risers. tri4
asked on January 7, 2016 
Math
I am not sure which questions I got wrong but I am not getting the link correct to the next box. The website is mathbits(dot)com/caching/holiday/H30976.html I got these answers 1.) Choice 3 2.) Choice 2 3.) a.) Choice 2 b.) 63 4.) 8 To move on I need to
asked on January 7, 2016 
Math
4. The CGJ girls plan to string a set of lights diagonally from two vertical poles for overhead lighting for dancing on the right side of the deck (see the diagram). The string of lights is sold in foot increments only. How many feet of diagonal lighting
asked on January 7, 2016 
chemistry
Observe the diagram of the electrolytic cell (A aqueous solution of molten salt with a power supply). The molten salt is lithium flouride. Write the half reaction occuring at the cathode, following the usual style guide and making sure to balance
asked on September 30, 2015 
Math
If you eat 1/6 of one pizza 1/4 of another pizza 5/12 of another pizza and 1/3 of another pizza have you eaten the equivalent of a whole pizza
asked on February 5, 2015 
physics
A tennis ball has a mass of 58 g and a diameter of 8 cm. Find the moment of inertia about its diameter. Assume that the ball is a thin spherical shell.
asked on January 22, 2015 
physics
The system shown in the figure below consists of a mass M = 3.5kg block resting on a frictionless horizontal ledge. This block is attached to a string that passes over a pulley, and the other end of the string is attached to a hanging m = 2.2kg block.
asked on January 22, 2015 
physics
A 2.1kg 12cmradius cylinder, initially at rest, is free to rotate about the axis of the cylinder. A rope of negligible mass is wrapped around it and pulled with a force of 18 N. (a) Find the magnitude of the torque exerted by the rope. N · m (b) Find
asked on January 22, 2015 
physics
A string that passes over a pulley has a 0.375 kg mass attached to one end and a 0.630 kg mass attached to the other end. The pulley, which is a disk of radius 9.50 cm, has friction in its axle. What is the magnitude of the frictional torque that must be
asked on January 21, 2015 
physics
A cat walks along a uniform plank that is 4.00 m long and has a mass of 7.00 kg. The plank is supported by two sawhorses, one 0.44 m from the left end of the board and the other 1.60 m from its right end. When the cat nears the right end, the plank just
asked on January 21, 2015 
physics
A swimmer heads directly across a river, swimming at 1.2 m/s relative to the water. She arrives at a point 48 m downstream from the point directly across the river, which is 77 m wide. (a) What is the speed of the river current? (b) What is the swimmer's
asked on September 10, 2014 
algebra 2
You have $16 to spend at a movie theatre. You spend $10 for admission. You want to buy soft drinks that cost $2.50 each, how many can you buy? Show your equation & work. Help!
asked on August 24, 2014 
Physic II
A flat 1.0 m2 surface is vertical at x = 2.0 m and parallel to the yzplane. What is the flux through the surface if it is located in a uniform electric field given by E = 25.0i + 42.0j + 62.0k N/C? Please show explanation
asked on February 2, 2014 
functions Steve and Reiny
I want to thank you both for your help and no sir I have never dealt with functions before as I am 44 years old and going back to school, I am taking an online class my textbooks are not scheduled to arrive until Nov 1, so I am a little lost but hey thank
asked on October 18, 2013 
functions
For each problem, construct two composite functions, . Evaluate each composite function for x=2 ok i have not dealt with composite functions can I please get some help with this as I have 20 questions to do can someone show me step by step on how to
asked on October 18, 2013 
math
1.)simplified 2x^4y/6xy^2 I got 1x4y? 2.)(8x^2)(3x^y) 18x^4y right? I ddnt know what to do with the y
asked on July 18, 2013 
math
solve (2y)^2(3x^3) I totally don't get this problem. Does my answer come out with x and y ? how do I eliminate?
asked on July 18, 2013 
Math
Alicia went on a steamboat ride up the Mississippi River. The boat travels 20 miles per hour in still water. How long will it take her to travel 60 miles upstream if the current of the river is 8 miles per hour?
asked on April 4, 2013 
math
susie writes the division fact 20/5=. write the remaining fact in this fact family.
asked on January 16, 2013 
3rd grade math
Draw a model to show 84/12=7
asked on January 16, 2013 
physics
can anyone please help me on this one? A circular coil (980 turns, radius = 0.078 m) is rotating in a uniform magnetic field. At t = 0 s, the normal to the coil is perpendicular to the magnetic field. At t = 0.027 s, the normal makes an angle of 45 degrees
asked on November 18, 2012 
physics
The radius of curvature of a convex mirror is 1.60 x 102 cm. An object that is 11.0 cm high is placed 40.0 cm in front of this mirror. Determine (a) the location and (b) the height of the image.
asked on November 14, 2012 
College Physics
In 1986, the distance of closest approach of Halley’s comet to the Sun is 0.57AU. (1 AU is the mean EarthSun distance = 150 million kilometers.) The comet’s speed at closest approach is 54.97 km/s. (a) – By 1989, Halley’s comet had traveled to a
asked on November 4, 2012 
Math
Prove that: P(A n B^c) = P(A U B)  P(B) and P(A n B^c) = P(A)  P(A n B)
asked on September 17, 2012 
Calculus
find f'(x) if f(x)=x^2*e^x*(3x1)^3
asked on February 24, 2012 
Calculus
find f'(x) if f(x)=x^2e^(x(3x1)^3
asked on February 23, 2012 
Calculus
find all points at the curve x^2y^2+2xy=3 with the slope of the tsngent is 1
asked on February 16, 2012 
Calculus
Could really use a lot of help here what is the slope of the tangent line to cos(xy)=xe^x at point (0,3pi/2)
asked on February 15, 2012 
geometry
you are standing 12ft from a cylindrical corn syrup tank the distance from you to a point of tangency on the tank 35ft what is the radius of the tank
asked on January 9, 2012 
ross
Find dy/dx for y=e^x/x^2
asked on June 27, 2011 
Math
The grocery store employs 35 cashiers and grocery baggers altogether. There are 5 cashiers for every 2 grocery baggers. How many of each are employed?
asked on March 22, 2011 
5th grade Math
How do I solve this problem: At Carver Elementary, there are 355 students altogether. The School has 25 more female students than males. How many males and females does Carver have?
asked on March 22, 2011 
Precalculus
Solve the triangle ABC under the given conditions. a = 19, b = 8.2, c = 12 A= B= C=
asked on December 13, 2010 
5th grade
compkete the pattern 25____61____97
asked on December 7, 2010 
Gilgamesh
How Does Gilgamesh respond to the death of Enkidu? a) He flees the city of Uruk to seek immortality b) He builds up the city of Uruk with monuments and massive walls to honor Enkidu c) He blames the harlot lass for brining this pain and suffering on Enkidu
asked on December 5, 2010 
earth science
If an atom has 17 electrons and its mass number is 35, calculate the following: number of protons, atomic number, and number of neutrons.
asked on September 23, 2010 
math sci
how can 36 stand for 1 square yard
asked on May 3, 2010 
science/math
sandy made a drawing of a rec tangle to show the area of the library. what is the area ,in square yards of the library? what stands for (1) square yard
asked on May 3, 2010 
Chemistry
In a lab we did potentiometric titrations with a mixture of NaCl/KI and AgNO3. We plotted a titration curve and found the 2 endpoints which indicate where I is and where Cl is. We are looking to find the concentration of both of the halides present, and we
asked on April 9, 2010 
Chemistry
Determine the concentration of Mg2+ (in mmol/L) in the unknown solution (Note: details and additional information to solve the problem are provided in your lab manual): Mass of EDTA: 0.606 g Volume of EDTA used in titration (step 1): 10.48 mL Volume of
asked on March 14, 2010 
social studies
how did the citystate have an impact on mesopotamia?
asked on November 16, 2008 
Physics
Does using (Fcos(theta))d work for this problem or should cos be replaced with sin? A cheerleader lifts his 66.4 kg partner straight up off the ground a distance of 0.718 m before releasing her.If he does this 27 times, how much work has he done?
asked on November 15, 2008 
science
i need information about the hydrogen molicule
asked on October 27, 2008 
chemistry
sorry Ksp of PbCl2 is 1.6 x 105
asked on May 26, 2008 
chemistry
What mass of NaCl should be found in 0.51 L of a saturated solution of sodium chloride if the Ksp of NaCl is assumed to be 1.5 x 105?
asked on May 25, 2008 
Math Help Please
I got this problem today in school, and I don't know how to go about soving it. Can someone show me. Thanks. Here it is. The distance s(t) between an object and its starting point is given by the antiderivative of velocity function v(t). Find the distance
asked on May 14, 2008 
trig
Evaluate without using a calculator or tables sin(pi/3  3pi/4) The answer is  1+ square root of 3 / 2 square root of 2 How do I get this answer?
asked on May 1, 2008 
trig
If 0 is less than or equal to 2theta less than or equal to pi and P(2theta)= (7/25, 24/25), find P(theta)
asked on May 1, 2008 
trig
Use the half angle formula to find cos(pi/12)
asked on May 1, 2008 
chemistry
Where can I find the reaction that produces ethyl formate, which is Methanol and Methanoic acid?
asked on April 26, 2008 
chemistry
Can I get weblinks that show the esterification reaction which produces ethyl formate and the estirificaiton process which produces Ethyl Butyrate?
asked on April 25, 2008 
chemistry
Using molecular polarities, discuss the solubility of the carboxylic acids in water.
asked on April 24, 2008 
physics
A 0.21 kg ball on a string is whirled on a vertical circle at a constant speed. When the ball is at the three o'clock position, the tension is 18 N. (c) Is the tension in the string greater when the ball is at the twelve o'clock position or when it is at
asked on April 4, 2008 
physics
A 0.21 kg ball on a string is whirled on a vertical circle at a constant speed. When the ball is at the three o'clock position, the tension is 18 N.  (a) How does the magnitude
asked on April 4, 2008 
physics
radius = Infinitely large velocity 30 m/s !@#$%^& would you compute the centripetal acceleration of with the radius being infintely large?
asked on April 4, 2008 
math
how do you find percents and degrees when there are 50 people and not 100
asked on October 22, 2007 
inglish
can you show me pictures that start with the leter A?
asked on October 18, 2007 
English
Help! I can't find any information on the origin of the idiom/expression: Put your foot in your mouth. Please help me! "put one`s foot in one`s mouth  get into trouble by saying something embarassing or rude My colleague put his foot in his mouth when he
asked on February 25, 2007 
last problem
State the domain restriction for y = 5/(x+16)
asked on August 28, 2005 
another one i need help with
If f(x) = 3x, g(x) = x^2 1, then find f(g(3))(HINT:The answer to this question should be a number not another function.) g(3) = 9  1 = 8, and f(g(3)) = f(8) = 24
asked on August 28, 2005 
can somebody help me with this
College enrollments in the United States are projected to increase from 1995 to 2005 for public and private schools. The models below give the total projected college enrollments in thousands, where x=0 represents the first year 1995. Public College: f(x)
asked on August 28, 2005

backwards math
It is 28
posted on June 29, 2020 
math
no
posted on March 29, 2020 
MATH HELP! LAST QUESTION!
Hey there, Want to reach brandnew consumers without preliminary costs? We are personally inviting you to join one of the leading affiliate networks online. This network discovers influencers and affiliates from their platform to promote your
posted on July 1, 2019 
Finance
I think Jakob should try and escape from the airport
posted on September 24, 2018 
history
I think it is B Ireland.
posted on August 9, 2018 
social studies
thx
posted on February 13, 2018 
Tech ed
BAD For CONNEXUS
posted on February 1, 2018 
Science
Chromosomes
posted on January 11, 2018 
SIG FIGS
22.0 has three 0.22 has two 22 has two 0.022 has two 0.00000000223 has three
posted on October 8, 2017 
English
A building 64 ft high casts a 288ft shadow. Sarah casts a 18ft shadow. The triangle formed by the building and its shadow is similar to the triangle formed by Sarah and her shadow. How tall is Sarah? 3 ft 6 ft 4 ft 5 ft
posted on November 29, 2016 
math
A building 64 ft high casts a 288ft shadow. Sarah casts a 18ft shadow. The triangle formed by the building and its shadow is similar to the triangle formed by Sarah and her shadow. How tall is Sarah? 3 ft 6 ft 4 ft 5 ft
posted on November 29, 2016 
math
A building 64 ft high casts a 288ft shadow. Sarah casts a 18ft shadow. The triangle formed by the building and its shadow is similar to the triangle formed by Sarah and her shadow. How tall is Sarah? 3 ft 6 ft 4 ft 5 ft
posted on November 29, 2016 
math
The actual length of a puma is 2.45 m. The scale of a drawing of the puma is 1 cm : 0.5 m. Find the length of the puma in the drawing, to the nearest tenth of a centimeter. 4.9 cm 2.45 cm 1.2 cm 12.3 cm Description
posted on November 29, 2016 
math
The actual length of a puma is 2.45 m. The scale of a drawing of the puma is 1 cm : 0.5 m. Find the length of the puma in the drawing, to the nearest tenth of a centimeter.
posted on November 29, 2016 
Check English Answers
1 2 1 2 3
posted on March 3, 2016 
science
copper
posted on December 15, 2015 
Statistics
$32,000 less.
posted on August 12, 2015 
science
A canoe displaces 100 L of water. Water weighs 9.8 N/L. What is the buoyant force on the canoe?
posted on June 25, 2014 
Algebra
11
posted on December 9, 2013 
PreCalc
thank you
posted on September 28, 2011 
PreCalc
In #2 it was which one is NOT a representation , that's why I thought (5,30) I can't have all of them just the one that is NOT a representation Thank you
posted on September 28, 2011 
accounting
$183,000
posted on July 3, 2011 
reading
Please tell me the question and I will answer as soon as possible!
posted on March 24, 2011 
us history
Are there any specific examples of the belief in Social Darwinism in American imperialism? The only thing that comes to mind was the extermination/assimilation of natives, but that's more so European imperialism.
posted on February 1, 2011 
earth science
FIND OUT YOURSELF LITTLE KID!!!!
posted on September 23, 2010