Friday
December 9, 2016

# Posts by Johnathan

Total # Posts: 94

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.
October 15, 2016

math
A building 64 ft high casts a 288-ft shadow. Sarah casts a 18-ft 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
May 18, 2016

math
A building 64 ft high casts a 288-ft shadow. Sarah casts a 18-ft 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
May 18, 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
May 18, 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.
May 18, 2016

Lesson 13: Matter and Energy Unit Test
Oh mann!! Thanks so much!! These a answers are right! I got a 100%, 2 ungraded!! You're the bomb!! Now I won't be five weeks behind in Science!
March 14, 2016

English
A building 64 ft high casts a 288-ft shadow. Sarah casts a 18-ft 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
March 4, 2016

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 3. The two risers at...
January 7, 2016

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 number of kernels of ...
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 get this: Find the ...
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 will need to be ...
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 electrons.
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
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.
January 22, 2015

physics
The system shown in the figure below consists of a mass M = 3.5-kg 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 = 2.2-kg block. The pulley is a uniform...
January 22, 2015

physics
A 2.1-kg 12-cm-radius 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 the angular ...
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 exerted by the axle if...
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 begins to tip. If the ...
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 speed relative to ...
September 10, 2014

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 that is 35° ...
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!
August 24, 2014

1 2 1 2 3
April 14, 2014

Accounting
\$32,000 less.
April 10, 2014

Physic II
A flat 1.0 m2 surface is vertical at x = 2.0 m and parallel to the yz-plane. 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
February 2, 2014

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
January 26, 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 you both once again, ...
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 properly solve this ...
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
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?
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?
April 4, 2013

math
susie writes the division fact 20/5=. write the remaining fact in this fact family.
January 16, 2013

Draw a model to show 84/12=7
January 16, 2013

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 one-eighth of a ...
November 23, 2012

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 with the field ...
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.
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 Earth-Sun 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 distance ...
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)
September 17, 2012

science
A canoe displaces 100 L of water. Water weighs 9.8 N/L. What is the buoyant force on the canoe?
July 28, 2012

Calculus
find f'(x) if f(x)=x^2*e^x*(3x-1)^3
February 24, 2012

Calculus
find f'(x) if f(x)=x^2e^(x(3x-1)^3
February 23, 2012

Calculus
find all points at the curve x^2y^2+2xy=3 with the slope of the tsngent is -1
February 16, 2012

Calculus
find y'' if x^4+y^4=16
February 16, 2012

Calculus
Could really use a lot of help here what is the slope of the tangent line to cos(x-y)=xe^x at point (0,3pi/2)
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
January 9, 2012

Pre-Calc
thank you
September 28, 2011

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
September 28, 2011

science
copper
August 30, 2011

ross
Find dy/dx for y=e^x/x^2
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?
March 22, 2011

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?
March 22, 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.
January 30, 2011

us history
What was the role of Social Darwinism in American imperialism? Are there implications of race underneath a belief in Social Darwinism?
January 30, 2011

Please tell me the question and I will answer as soon as possible!
January 22, 2011

Precalculus
Solve the triangle ABC under the given conditions. a = 19, b = 8.2, c = 12 A= B= C=
December 13, 2010

compkete the pattern 25____61____97
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 d) He attempts to ...
December 5, 2010

earth science
FIND OUT YOURSELF LITTLE KID!!!!
September 23, 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.
September 23, 2010

math sci
how can 36 stand for 1 square yard
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
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 have the equation ...
April 9, 2010

Chemistry
The indicator used was Eriochrome Black T, and for the double titration... I don't know. I know that NaOH was added to precipitate Mg(OH)2, and then it was titrated with EDTA. Then it was left to sit for 5 minutes to dissolve any precipitated Ca(OH)2, and titrated again to...
March 14, 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 EDTA used in titration (...
March 14, 2010

accounting
\$183,000
September 30, 2009

social studies
how did the citystate have an impact on mesopotamia?
November 16, 2008

Physics
How do you find the force to plug in
November 15, 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?
November 15, 2008

science
i need information about the hydrogen molicule
October 27, 2008

chemistry
sorry Ksp of PbCl2 is 1.6 x 10-5
May 26, 2008

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?
May 26, 2008

chemistry
My best answer would be: HCl]4[O2] / [H2O]2[Cl2]2 Is this correct?
May 25, 2008

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?
May 25, 2008

chemistry
sorry Ksp of PbCl2 is 1.6 x 10-5
May 25, 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 10-5?
May 25, 2008

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 between the ...
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?
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)
May 1, 2008

trig
Use the half angle formula to find cos(pi/12)
May 1, 2008

chemistry
This may be what Im after:) Please elaborate in this reaction
April 26, 2008

chemistry
Where can I find the reaction that produces ethyl formate, which is Methanol and Methanoic acid?
April 26, 2008

chemistry
Where can I find the reaction that produces ethyl formate, which is Methanol and Methanoic acid?
April 25, 2008

chemistry
Can I get weblinks that show the esterification reaction which produces ethyl formate and the estirificaiton process which produces Ethyl Butyrate?
April 25, 2008

chemistry
Using molecular polarities, discuss the solubility of the carboxylic acids in water.
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 the six o'...
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 of the ...
April 4, 2008

physics
radius = Infinitely large velocity 30 m/s Hoe would you compute the centripetal acceleration of with the radius being infintely large?
April 4, 2008

math
how do you find percents and degrees when there are 50 people and not 100
October 22, 2007

inglish
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 told ...
February 25, 2007

Pigskin Geography
in which state will two games be played?
October 30, 2006

last problem
State the domain restriction for y = 5/(x+16)
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
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) = 106x + 11,157 ...
August 28, 2005

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