Sunday
February 14, 2016

Posts by K

Total # Posts: 843

bio
How many grams of MgCl2 do you need to make 2 L of a 0.2 M solution?
February 8, 2016

Spanish
What's the difference between "mensajero" and "repartidor"?
January 19, 2016

math-linear equations
x=cows y=horses x+y=340 y=x+52 Plug in x+52 for your y value on the first equation. Solve for x, and then y.
January 19, 2016

math
During a triathlon, Sharon swims 1/4 of the total route and cycles 3/5 of the remaining route. She runs the rest of the route. If she runs 3,600 meters, find the total distance if the route
January 14, 2016

chemistry
how many liters (at STP) of chlorine gas are required to produce .050L of hydrogen chloride gas?
January 12, 2016

physics
A particle of mass m = 0.3 kg is acted upon by a force so that its position vector, r(t)=2.0t^2(i)- 5.0t^2 (j) +t^2 (k) where t is in s. What is the (instantaneous) power delivered by this force to the particle at time t = 2.0s?
December 10, 2015

Geometry
To repair a roof that is 4 meters high, Mr. Russo leans a 5-meter ladder against the side of the building. To reach the roof, how far away from the building should he place the base of the ladder?
December 10, 2015

math
A researcher uses analysis of variance to test for mean differences among three treatments with a sample of n = 12 in each treatment. The F-ratio for this analysis would have what df values?
November 22, 2015

Math
A walks 6 miles in 90 mins, how many miles does A walk in 60 minutes?
October 29, 2015

Social Studies Please Check My Answers
victora is right thanks!
October 29, 2015

social studies
what resource first drew european traders to canada? AND I WANT THE RIGHT ANSWER!
October 12, 2015

Physics
You can shoot an arrow straight up so that it reaches the top of a 25-m-t building. (a) How far will the arrow travel of you shoot it horizontally while pulling the bow in the same way? The arrow starts 1.45 m above the ground.(b) Where do you need to put a target that is 1.45...
October 10, 2015

math
Tim needs to fill 3 20L barrels with oil. Oil dispenser flows at 100ml/s . How long to fill up 3 barrels. Please help by showing all steps so I can understand how the answer was determined. Thanks!
October 2, 2015

Algebra I
If a set of ordered pairs is a function, are the ordered pairs also a relation? (Also, please explain why)
September 29, 2015

L.A
The correct answers are B A B Just got 100% 3/3
September 22, 2015

Calculus
I know the derivative of x is 1, but I'm having a hard time proving it with the limit definition of the derivative. I have... Lim delta x ->0 (x+ delta x)-(x)/delta x = 0 But I know the answer is 1. I don't understand what I am doing wrong
September 14, 2015

math
The number of units a factory produces is estimated to increase 15% every year geometrically. The production of first years was 5000 units. Estimate the production of the fifth year.
September 7, 2015

Math Trig
Length of side answered. Can not find bearing of angle .4
September 7, 2015

Math Trig
A plane's flight path called for it to fly from J to W. W is 200kms due North and 500kms due west of J. Draw a coordinate picture. What bearing will the pilot fly and what distance will he or she go in air kilometers?
September 7, 2015

math
A planes flight path called for it to fly from J to W. W is 200km due North and 500km West of J. What bearing will the pilot fly and what distance will be traveled in air kilometers. I know to draw and image but that is it.
September 4, 2015

Math Trig
A plane's flight path called for it to fly from J to W. W is 200kms due North and 500kms due west of J. Draw a coordinate picture. What bearing will the pilot fly and what distance will he or she go in air kilometers?
September 3, 2015

Math
Pouring concrete into backyard. The patio slab will be 7m long, 2m wide and 10cm deep. How many cubic meters of concrete will you need to fill the patio?
September 3, 2015

Chemistry
Thanks!
July 8, 2015

Chemistry
Is my Henderson equation right? 10.15=9.95+log(x/(.059-x))
July 8, 2015

Chemistry
What volume, in liters, of 1.04 M KOH solution should be added to a 0.116 L solution containing 10.08 g of glutamic acid hydrochloride (Glu, FW = 183.59 g/mol; pKa1 = 2.23, pKa2 = 4.42, pKa3 = 9.95) to get to pH 10.15?
July 8, 2015

physics
Explain how it is possible for a motorcycle (mass = 250 kg) to have the same momentum as a locomotive engine (mass = 2,500 kg) i though momentum was directly proportional to mass so the more mass the more the momentum? how is it possible then?
July 1, 2015

physics
A ball (mass 12 kg) moving at 15 m/s in the +x-direction collides with a ball (mass 36 kg) moving at 5.0 m/s in the +y direction. After colliding, the 12-kg ball moves at 6.0 m/s at an angle of 30°above the +x direction. Afterward, what is the speed and direction of the 36...
July 1, 2015

chemistry
256
June 7, 2015

Language Arts
all of them are but number 3
May 20, 2015

M
A woman spend half of her money on book and give 1 rupee to a man,than she sped half of rest money and give 2 rupee to a man,than spend half rest money give3 rupee to a man.at last 1 rupee left.what amound he have at first
May 11, 2015

English 3
What is the message/theme in "Eulogy" by Brian Turner?
April 19, 2015

College Accounting
The Thompson Company uses activity-based costing to determine product cost. Three activities and their rates have been calculated as shown below. Setting up equipment = $500 per setup Moving goods = $20 per move Machining = $4 per machine hour Thompson provided the following ...
April 17, 2015

biology
How does the plant regulate what is able to enter into the stem of the plant? Does it have something to do with the casparian strip?
April 12, 2015

Calculus
1. integral (x^3 * sqrt(x^2-4)) dx I'm confused on how to start this problem, if I am doing trig substitution.
April 5, 2015

chemistry
calculate the grams of 1.8% (m/m) NaCl solution that contains 8.00 g of NaCl I tried 1.8 times 8.00g divided by 58.44g times 100 my answer is 24.6g rounded to 2 SF is 25g this truned out to be wrong I'm stumped!
April 1, 2015

English
Jhon and amy ----- things.(to swap)
April 1, 2015

physics
1) What average power is required for a runner with a mass of 85 kg to reach a speed of 8 m/s from a stationary start during a time of 2 s? 2) A 1000 kg car travels east at 30 m/s and collides with a 3400 kg truck travelling south at 20 m/s. After the collision the two ...
March 29, 2015

Astronomy
25
March 26, 2015

algebra
🖕🏽
March 24, 2015

math
For more than 4000 years the Great Pyramid of Giza stood as the tallest structure in the world. After it was completed, the pyramid stood an amazing 481 feet high. Y 9 th. grade math Semester Project: The Great Pyramid of Giza
March 19, 2015

Chem
How many moles of NH3 must be added to 1.00 L of solution to dissolve 1.39 g of CuCO3? For CuCO3, Ksp = 2.3 × 10-10. Ignore hydrolysis of CO32-, but consider the formation of the complex ion Cu(NH3)42+.
March 9, 2015

math
anne spent half of her money on CDs. After se spen half of what was left on stickers
March 3, 2015

College Alegebra
a 23 foot ladder is placed against a vertical wall of a building with the bottom of the ladder standing on level ground 18 feet from the base. how high up the wall does the ladder reach?
February 20, 2015

math
After 5 years, marcels account earned $ 600 in interest. If the interest rate is 0.03, how much did marcel initially invest?
February 19, 2015

math
you must choose the correct answer and then choose the correct solution to get the rigth result never go left you wanna go the rigth way cayse that is the rigth way to go. so always pick the correct solution so the result is positive. Hope this helped if you need more help ...
January 23, 2015

chemistry
Solid lead(II) iodide was prepared by reacting 65.0 mL of a solution containing 0.218 M lead(II) ions with 80.0 mL of a solution containing 0.265 M iodide ions. If the actual yield of the reaction was 3.26 g, which choice is closest to the %yield of the reaction?
January 22, 2015

chemistry
In the determination of the molar mass of a volatile liguid a 250ml flask was found to contain 0.250g of the vapor measured at 273c and 760 mmhg pressure. The molar mass is nearest the value
December 21, 2014

chemistry
A sample of co2 occupies 6.00l at 25c and 700. MmHg. What is the volume of the gas at stp
December 21, 2014

chemistry
When 40.2g of kc103 is heated what quantity of kc1 is produced
December 21, 2014

math
I though you Will give me the answer.
December 2, 2014

chem 200
669 cal of heat is added to 5.00 g ice at –20.0 °C. What is the final temperature of the water?
November 30, 2014

Chemistry
If 9560 J of energy were absorbed by 500. g of ice at 0.0 °C, what would be the final temperature? Can someone walk me through setting this up?
November 15, 2014

chemistry
Draw one of the Lewis structure of the N2O5. In each case one oxygen bridges the nitrogens (N-O-N single bond) and 2 other oxygens are bonded to each N. How many equivalent resonance structures are there that satisfy the octet rule and where O makes at most 2 bonds?
November 6, 2014

Physics
You are driving down a highway at a speed of 20.0m/s when you spot a deer. You quickly slam on your brakes, trying to stop your car in front of the deer. Assume the braking force can be modeled as kinetic friction with a friction coefficient of 0.80. If the deer was 75.0m away...
October 28, 2014

math please help
3370.56?
October 27, 2014

math
David has a hose that is 27 ft long. He wants to cut it into two pieces so that the longer piece is 3 ft more than 2 times the length of the shorter piece.
October 27, 2014

science
EVERYONE! -A is a correct! 5/5 THANK YOU
October 21, 2014

Math
Which algebretic equation correct represents this sentence? 25 is three times a number decreased by 8. A. 25 = 3w - 8 ? B. 3 = 25w - 8 ? C. 3 = 25w + 8 ? D. 25 =3(w + 8) ? a little confused lol.. help? Thanks Everyone So Much
October 20, 2014

Language Arts
Thanks again to everyone who helped me :)
October 20, 2014

Language Arts
Okay thank you. So... For "I love to visit Pine Acers, our cabin in the mountains" Circled "cabin" Underlined "Pine Acres" ????
October 20, 2014

Language Arts
Okay so in English I'm doing "Appositives" I understand the question and I'm just confused a little. Circle the appositives. Then, underline the noun each appositive explains. 1. Sheila, my cousin works in that department store. I circled "Sheila" I...
October 20, 2014

Science! Help
LISTEN TO IHateSchoolButGetStrightAs HES RIGHT THANK YOU!
September 23, 2014

U.S History Honors
Identify the causes of Progressivism and compare it to Populism
September 14, 2014

4th grade math
128,955 . Round each number to the place of the underllined digit. 8 is the underlined digit
September 8, 2014

chemistry 101
A patient receives 2700mL of an IV solution containing 4g g of glucose per 100 mL .How much energy, in kilojoules, does the patient obtain from glucose, a carbohydrate? please help I keep getting the wrong answer
September 4, 2014

chem
A patient receives 2700mL of an IV solution containing 4g g of glucose per 100 mL .How much energy, in kilojoules, does the patient obtain from glucose, a carbohydrate?How much energy, in kilocalories, does the patient obtain from glucose?
September 3, 2014

Chemistry
Just to clarify- if I would have to mix 100 mL of 36 M solution with 600 mL of distilled water to make a 6 M solution (700 total mL) is that correct, or do I have that mixed up? Sorry for the trouble :(
September 2, 2014

Chemistry
Question: how do you dilute something with a huge concentration to the same thing with a smaller concentration? For example: How do you dilute a 36 M solution of NaOH to a 6 M solution of NaOH?
September 2, 2014

chemistry
Suppose you have two 100-mL graduated cylinders. In each cylinder there is 40.0mL of water. You also have two cubes: one is lead(11.3g/ml), and the other is aluminum(2.70g/ml) Each cube measures 2.0cm on each side. After you carefully lower each cube into the water of the ...
September 2, 2014

chem
but doesn't the lead and aluminum have anything to do with the calculation
September 1, 2014

chem
Suppose you have two 100-mL graduated cylinders. In each cylinder there is 40.0mL of water. You also have two cubes: one is lead, and the other is aluminum. Each cube measures 2.0cm on each side. After you carefully lower each cube into the water of its own cylinder, what will...
September 1, 2014

engineering maths
Show that the following curves are intersect eachother orthoganally.r-(1+coso) r-(1-coso)
August 31, 2014

World Geography
A. was the correct answer.
August 1, 2014

World Geography
19.With respect to human rights issues in Southeast Asia, which statement is most accurate? A.Both Cambodia and Vietnam carried out ethnic eradication programs against hill people. B.Chinese merchants living in Cambodia and elsewhere have carried out vendettas against hill ...
August 1, 2014

chemistry
A block of copper of unknown mass has an initial temperature of 66.7 ∘ C . The copper is immersed in a beaker containing 95.5g of water at 20.6 ∘ C . When the two substances reach thermal equilibrium, the final temperature is 26.0 ∘ C .What is the mass of the...
July 2, 2014

math
At Dora's donut shop, dora makes 15 different varieties of donuts. Seven of these varieties are filled with jelly or cream. Officer sweetooth was sent to dora's shop to choose a dozen donuts, all different, with six filled and six unfilled. How many different ...
June 8, 2014

Math Personal Finance
65
June 8, 2014

Language Arts /The Giver
I just took the quiz I got a 100
May 21, 2014

Language Arts /The Giver
your answers are correct
May 21, 2014

math
Indicate whether the following statement is true or false. If a figure can be translated, then it will tessellate. I say false am I right?
May 19, 2014

physics
an electron in the second energy level absorbs a photon of energy 6 ev what's the speed of the ejected electron? I have tried to manipulate and use the kinetic energy equation, c= lamba x f, and many other ways, but I don't know why can't get the answer, which is v...
May 18, 2014

math
Use integers from-3 to 3 to graph the equation. y=1/3|x|-2. Please help me how it would be on a graph
May 18, 2014

math
I forgot to put use the integers -3 to 3 to graph the equation.
May 18, 2014

math
What would a graph look like with the equation y=-2(x)2+3.the two next to the x means to the second power. Please help me
May 18, 2014

math
Your description helped me understand thank you. It is D
May 17, 2014

math
Is it A
May 17, 2014

math
The vertices of ABC are A(2,-5), B(-3,5), and C(3,-3).the triangle is reflected over the x-axis.use arrow notations to describe the original triangle and its reelection. A) A(2,-5),B(-3,5),C(3,-3)->(2,-5),(-3,5),(3,-3) B) A(2,-5),B(-3,5),C(3,-3)->(-2,5),(3,-5),(-3,3) C) ...
May 17, 2014

math
Can't you just tell me if its a,b,c, or d? I'm stressed out please
May 17, 2014

math
The point C(3,-1) is translated to the left 4 units and up 1 unit.write a rule to describe the translation.what are the coordinates of the image point? A) (x,y)->(x+4,y+1);(7,-2) B) (x,y)->(x-4,y-1);(-1,0) C) (x,y)->(x+4,y-1);(7,0) D) (x,y)->(x-4,y+1);(-1,0) Is it d
May 17, 2014

math
what is the correct description for the translation of A to A? A(10,3)->A(1,6) a) right 9; up 3 b) left 9; down 3 c) right 9; down 3 d) left 9; up 3 Is it C
May 17, 2014

math
y=1/3|x|-2 use integer values of x from-3 to 3 to graph the equation. Please help me graph this
May 17, 2014

math
y= -2x+3.the x has a 2 above it
May 17, 2014

math
I'm only in seventh grade and I don't understand any of this.what does a parabola look like
May 17, 2014

math
y=2x^+3 use integer values of x from -3 to 3 to graph the equation. Someone please tell me how to graph this
May 17, 2014

Alg
order your answers from smallest to largest x, then from smallest to largest y. If there is no solution, enter NO Solution 2x^2+3y^2=48 x^2-y^2=4 (x,y)= ( , ) (, ) (x,y)= ( , ) (, ) (x,y)= ( , ) (, ) (x,y)= ( , ) (, )
May 2, 2014

statistics
Data were collected on 100 students regarding their class and major. The data are summarized in the following contingency table. What is the probability of randomly selecting a sophomore or an undeclared student?
April 23, 2014

Alg
A car with good tread can stop in less distance than a car with poor tread. A model for the stopping distance d, in feet, of a car with good tread on dry cement is d = 0.04v2 + 0.5v, where v is the speed of the car in miles per hour. If the driver must be able to stop within ...
April 16, 2014

graphing
(0,-2)is the vertex- what is the domain and range??? State the domain and range of the function. (Enter your answers using interval notation.)
April 11, 2014

Criminal law
1. The primary purpose of psychological profiling is to provide: A.the identity of an offender involved in a violent crime such as murder or sex crime. B. absolute information about an offender’s emotional and personality character traits and to immediately direct ...
March 28, 2014

Math
Reiny, 16 times 3 is 48. You are wrong.
March 5, 2014

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