Sunday
May 29, 2016

Posts by Zach

Total # Posts: 375

chemistry
and List all measurements and include proper labels. Molecular weight of benzoic acid: 122.12 g/mole Mass of benzoic acid used: Titration of NaOH and benzoic acid: (Fine Titrations Only) Trial 1 Trial 2 Initial volume(NaOH)(ml) final volume(NaOH)(ml) Calculations/...
April 15, 2011

chemistry
PLEASE NOTE: Titration requires several steps in order to obtain exact results. The procedures described in this lab assume that you have already done the TITRATION TUTORIAL and are familiar with the technique. 1. Prepare the NaOH solution by dissolving approximately 4g of ...
April 15, 2011

math- algebra- help please!
3 dice are rolled let (y,r,b) represent each outcome? a- sample space b- prob rolling a sum of 18 c- prob of rolling a sum less than 5
April 6, 2011

Spanish
A usted _______gusta jugar a los deportes. What goes in the blank?
March 29, 2011

Calculus
The Problem: The spherical top holds a little over 54,000 gallons of water. The base of the top is 60 feet above the ground. The diameter of the supporting column is one-third the radius of the sphere. The base of the supporting column flares out like a cone (a frustum) so ...
March 27, 2011

physics
A certain roller coaster has a circular, vertical loop of radius 10 meters, such that at its top the riders are upside down. How fast does the roller coaster move at this point if the riders feel perfectly weightless when passing the top of the loop?
March 20, 2011

math
how do i write a decimal and a fraction to show what part of a dollar one penny represents
March 2, 2011

algebra2/trig
4.8 hours
February 26, 2011

Algbra
I need help with the following question. Solve for y: 3x - 2y = 8 + x Please show the steps and the answer, thanks.
February 14, 2011

Geometry
find the lengths of the sides of a triangle whose perimeter is 37. The measure of the first side of the triangle is 8 less than the second side, and the second side is twice the length of the third side
February 10, 2011

Algebra
Please help me solve for the following coefficients. The equation is: 2X-Y=4 if X = 0, then Y = ? if Y = 0, then X = ? if X = 1, then y = ? if Y = -6, then X =? Thanks!
February 9, 2011

physics
Approximate the gravitational force of attraction between a 49.0 kg girl and a 52.0 kg boy if they are sitting 2.5 m apart
February 7, 2011

Algebra 2
A Rectangular Field is to be enclosed by a fence and divided into three parts by another fencer. Find the maximum area that can be enclosed and separated in this way with 500 meters of fencing.
February 3, 2011

Algbra
I need help with the following problem. -6 less than or equal to 3 + 1/3a less than or equal to 5 Please show steps and answer. Thanks.
February 2, 2011

Physic
A ball throw at 45 degree angle with an initial speed of 15m/s. the time for the ball to reach its highest point can be found from the data and known constants using which equation? solve for time?
January 31, 2011

college calc
vertical asymptotes of tan(pi*x)
January 30, 2011

Algbra
1/4x - 5/12x = x - 4/3 Please show steps and answer. Thanks.
January 24, 2011

math
If g(x)= -2^2 and h(x)=x-2/5. Find the indicated value. h(g(5)) I got -5.4. is that right?
January 24, 2011

chemistry
How many grams are in one milliliter?
January 23, 2011

math
(y^4)^1/6
January 20, 2011

chemistry
your carbon atoms aren't equal and i didn't split up my carbon dioxides however it should change anything balancing wise. 2C3H6N6O6 + 3O2==> 6h20 +6CO2(or 3CO2 +3CO2) + 6N2 C=6 C=6 H=12 H=12 N=12 N=12 O=18 O=18 Hope this helps!
January 17, 2011

Algbra
How do you solve this problem? 3/5k - (k + 1/3) = 1/15 (k + 3) Please show me the steps. Thanks.
January 16, 2011

chemistry
In my book the anser for D is 2.68 x 10^4 mg/L as CaCO3, my first thought was to do what you did but i cant get to the answer in the book, am I missing something very obvious here? Im getting like 5.4 x 10^4
January 15, 2011

math
4(3)+4(3) *4 *4 --------- 12+12=24
January 12, 2011

physics
A museum curator moves artifacts into place on many different display surfaces. Use the values in Table 4-2 in the textbook to find Fs,max and Fk if you were to move a 157 kg aluminum sculpture across a horizontal steel platform. Fs,max: Fk:
November 18, 2010

Math
Are (1/2 x 3) x 8 and 3 x (1/2 x 8) equal? Explain how this can help in finding the area of a triangle
November 17, 2010

math
I need to variables would equal 180 by being divided by 1/2
November 17, 2010

math
A=1/2bh A= 1/2 ? ? A= 180 what could the base and height be?
November 17, 2010

math
How does (1/2 x 3) x 8 and 3 x (1/2 x 8) being equal help in finding the area of a triangle?
November 17, 2010

math
Finding the area or a triangle A=1/2bh A= 1/2 x 13.6 x 7
November 17, 2010

math
How do I find the area of a triangle?
November 17, 2010

Chemistry
calculate the number of formula units of 0.0067 g of lithium carbonate, Li2CO3?
November 11, 2010

Chemistry
How many grams of potassium can be obtained from the decompostion of 100 grams of KCl?
November 11, 2010

chemistry
How much iron can be recovered from 25.0 grams of FeO?
November 11, 2010

science
In order for conduction to occur particles must make what?
October 26, 2010

algebra
86 degrees Fahrenheit = 30 degrees Celsius so, (30,86)
October 13, 2010

Physics
I have one problem I just can't figure out, A machine in an ice factory is capable of exerting 3.30 * 10^2 N of force to pull large blocks of ice up a slope. The blocks each weight 1.21 * 10^4th N. Assuming there is no friction, what is the max angle that the slope can ...
October 13, 2010

physics
A. 5.729 m/s^2 B. 51.5625 m/s^2 C. 183.333m D. 70,088m
October 13, 2010

physics
A. a = v/t 165km / 8s = 20.625 km/h/s B. t= 60s-8s =52s, V= 1650km/h-165km/h =1485km/h a=v/t 1485km/h / 8s= 185.625km/h/s C. d=1/2at^2 1/2 * 20.625 km/h/s * (8s)^2 = 183.333m D. 60s-8s=52s d=1/2at^2 1/2 * 186.625km/h/s * (52s)^2 = 70.088km
October 13, 2010

analogies
dollar:cent;meter:centimeter
October 6, 2010

math
I would set up a proportion meters 1 x ---- --- --- scale 2.5 100 (% means out of a hundred) Since 25 x 40 = 100, then 1 x 40 = 40 The bridge is 40m long.
October 6, 2010

Math-Algebra
3|x+5|<= 6 |3x+15|<= 6 -15 -15 |3x| <= -9 /3 /3 x <= -3 Yes, you are correct.
October 6, 2010

algebra
You need to set up the proportion Base 6.5m 4m ---- ---- ---- Length 3.7m e Then you cross multiply: 6.5xe=6.5e 4x3.7= 14.1m So therefore, 6.5e = 14.1m Then divide both by 6.5 to get what e equals. 6.5e/6.5 = e 14.1/6.5 ≈ 2 so e ≈ 2.
October 6, 2010

Teacher Aide
Test scoring
September 30, 2010

math
Is this a star polygon, a polygon, or other, how many sides does it have? {9/3}
September 20, 2010

math
A roulette wheel has 18 red slots and 18 black slots numbered alternaetly with the numbers 1 through 36. Two green slots are numbered 0 and 00. The winning number is determined by the slot into which a single marble rolls. Players are not allowed to bet on green. The house ...
September 18, 2010

algebra
1/3(x+3)+1/6(x-6)=x+3
June 7, 2010

Math
When a survey of 800 people was done, 55% of those surveyed said they ate candy, 65% said they ate chips and 90% said they ate hot dogs. What is the smallest possible number of people who said they ate candy, chips and soda? -Zach
May 26, 2010

math
20 divided 2 minus 24 divided by 3 equals ? No parenthesis
May 24, 2010

Math
The side lengths of a right triangle are each an integral number of units. If one of the legs is 13 units, what is the perimeter of the triangle? Thanks ~Zach
May 20, 2010

Math
Six pipes each having a radius of 0.5 feet are stacked in a triangular pile with three pipes on the ground tangent to each other, two in the next row and one on top. What is the height of the pile. Express you answer in simplest radical form
May 13, 2010

algebra
Graph the linear equation. -3x + y = -6
May 5, 2010

math
Graph the linear equation. -3x + y = -6
May 5, 2010

Math
Thank you
May 4, 2010

Math
A large tank contains 400-kg mixture of water and alcohol. The mixture is 64% alcohol by weight. At each step, 100 kg of the mixture will be drained from the tank, replaced with 100 kg of water and then stirred. After three steps, what percent of the final solution will be ...
May 4, 2010

alegbra
Simplify: 5-3[2(3x-4)+3]
April 29, 2010

math
Simplify 5-3[2(3x-4)+3]
April 29, 2010

math
thank you jen
April 28, 2010

math
m+1 --- 4 + 5 -- 6 = 2m-1 ---- 12
April 28, 2010

algebra
Please help me! Sorry there are 4 questions I need to check my attempts with to see if I am on track. Thanks!! 1. 5-3[2(3x-4)+3] 2. Evaluate when x = -3 and y = 2 3x squared - 4y squared _______________________ 4x - 7y 3. -3/4y = -24 4. m + 1 5 2m - 1 ______ + ___ = ______ 4 6 12
April 28, 2010

algebra
Please help me! Sorry there are 4 questions I need to check my attempts with to see if I am on track. Thanks!! 1. 5-3[2(3x-4)+3] 2. Evaluate when x = -3 and y = 2 3x squared - 4y squared _______________________ 4x - 7y 3. -3/4y = -24 4. m + 1 + 5 = 2m - 1 ______ _ _______ 4 6...
April 28, 2010

9th grade - Civics
I'm doing a crossword. The question is what is the term to "postpone a sentence/fine?" It starts with an R_ _ _ I _ _ _. Thought it was suspend but this isn't right. Any help is great
April 28, 2010

math
Thank you very much Reiny!
April 27, 2010

math
2(x-5)+3x < 4(x-6)+1
April 27, 2010

9th grade Algebra
go to hell!!!
April 25, 2010

math
Thank you so much Reiny.
April 21, 2010

math
With income earned by selling the rights to his life story, an actor invests some of the money at 3% and 30,000 more than twice as much at 4%. The total annual interest earned from the investments is $5600. How much is invested at each rate?
April 21, 2010

Math
How many positive three-digit integers have the property that the tens digit is greater than or equal to the hundreds digit and the ones digit is greater than or equal to the tens digit? Please help :) thanks -Zach
April 21, 2010

math
Thank you so much Reiny.
April 14, 2010

math
The value of a "Mint State-63" 1950 Jefferson nickel minted at Denver is 8/7 the value of a 1945 nickel at Philadelphia. Together, the total value of the two coins is $15. What is the value of each coin?
April 14, 2010

Math
1/2 dozen eggs is 6. If 1/3 of 6 gets broken, it means 2 broke. 4 are not broken. If I understood the question correctly, this should be the correct answer.
April 5, 2010

algebra
Thanks so much Reiny!
April 5, 2010

algebra
6/7S - 3/4 = 4/5 - 1/7S + 1/6
April 5, 2010

Social Studies
I don't get it, so the four influences that Greece had on Roman culture are art, religion, mythology, and the Latin alphabet?
April 2, 2010

Social Studies
What four influences did Greece had on Roman culture?
April 2, 2010

College Chemistry
1) The concentration of the aluminum ion in a test solution is 0.10M. Using the Ksp for aluminum hydroxide (3. x 10^-34), calculate the concentration of hydroxide needed to precipitate aluminum hydroxide. From the concentration of the hydroxide, calculate the pH of the ...
April 1, 2010

Math
That's all the data I have.
March 30, 2010

Math
The rectangular prism has a height of 28 cm and holds exactly 360cm cubed. What is the length and width using the formula lwh?
March 30, 2010

Chemistry
If the yield from the reaction of acetic acid with isopentyl alcohol is 45% how many grams of isopentyl acetate are formed from 3.58g of acetic acid and 4.75g of isopentyl alcohol?
March 18, 2010

algerba1
simplify -x/4/6/x
January 10, 2010

algerba1
simplify -x/4/6/x
January 10, 2010

Algebra
The radius of a circle is increased by 85%. How much will the area increase in percent? Round your answer to the nearest tenth if a percent. I'm stuck on this question. Thanks -Zach
December 27, 2009

8th grade
need help thank-you translate the verbal phrase into an inequality, then solve the inequality and graph your solution, the product of 6 and the difference of 6x and 3 is less than or equal to the product of -2 and the sum of 4 and 8x
December 7, 2009

algerba i
2(7n-1)> or equal 3(5-n)
December 3, 2009

Algebra 1
In how many ways can Abby, Bonnie, Chuck, Dennis, Ed and Fred line up at the water fountain so that the two girls, Bonnie and Abby, are not beside each other?
December 3, 2009

Algebra
The school that Trevon goes to is selling tickets to a choral performance. On the first day of ticket sales the school sold 12 adult tickets and 4 student tickets for a total of $188. The school took in $171 on the second day by selling 6 adult tickets and 9 student tickets. ...
December 3, 2009

Physics
A 60-cm-long, 500 g bar rotates in a horizontal plane on an axle that passes through the center of the bar. Compressed air is fed in through the axle, passes through a small hole down the length of the bar, and escapes as air jets from holes at the ends of the bar. The jets ...
November 30, 2009

Physics
A 5.50 kg cat leaps from the floor to the top of a 94.0-cm-high table. If the cat pushes against the floor for 0.220 s to accomplish this feat, what was her average power output during the pushoff period?
November 30, 2009

Physics
A 120 g ball moving to the right at 4.2 m/s catches up and collides with a 450 g ball that is moving to the right at 1.2 m/s. If the collision is perfectly elastic, what are the speed and direction of each ball after the collision?
November 30, 2009

physics
Two air-track carts are sliding to the right at 1.0 m/s and held together by a string. The spring between them has a spring constant of 140 N/m and is compressed 4.5 cm. The carts slide past a flame that burns through the string holding them together. Afterward, what are the ...
November 30, 2009

Physics
In a hydroelectric dam, water falls 26.0 m and then spins a turbine to generate electricity. What is ∆U of 1.0 kg of water? Suppose the dam is 80% efficient at converting the water's potential energy to electrical energy. How many kilograms of water must pass through...
November 30, 2009

Algebra word problem
A retailer of DVD players knows that at a price of q dollars per player, he can sell (900 – 3q) players per month. Write a polynomial, in function notation, that represents the monthly income from the sale of DVD players.
November 29, 2009

communications
The electronic version is just an on-line, web version of the same ad that is in print, such as in a newspaper.
November 21, 2009

Math
The perimeter of a rectangle is 34 feet and the area measures 60 square feet. What are the length and width of the rectangle? (Hint: Use the equations : perimeter = times the sum of the length and the width area = length times width)
November 21, 2009

Algebra 1
Marcus and Allen are playing Rock/Paper/Scissors. The first one to one 10 times does not have to do the dishes. The score is now 9 to 7 in favor of Marcus. If ties are ignored and not counted, what is the probabilty Marcus will not have to do the dishes? Express your answer as...
November 16, 2009

Pre Calc
I get where a comes from. Is the answer 53/-610? It doesn't seem right.
November 15, 2009

Pre Calc
Write a quartic function that has roots that are 3+5i, -4 and 7 and f(-3)=53. I have tried it a bunch of times and can't seem to get it. (x-3+5i)(x-3-5i)(x+4)(x-7) I multiplied them together x^4-9x^3+24x^2+66x-952 I was a little unsure what f(-3)=53 means. I thought I ...
November 15, 2009

Pre Calc (For Reiny)
Thanks so much your method worked perfectly! My solution was: the remaining zeros were 5+2i, 3, and -4 I have one question that's bugging me though, why is it that synthetic division did not work for me? I thought that long division and synthetic division were both ...
November 15, 2009

Pre Calc
I am familiar with this type of problem but can't seem to get the right answer. Use the given zero to find the remaining zeros of each function f(x)=x^4-9x^3+7x^2-91x-348,zero 5-2i I normally would use synthetic division with the root 5-2i bringing it down to x^3. Then ...
November 13, 2009

Pre-Calc Can't find where I went wrong
I tried to solve for H in the volume equation. so, 2=3.14(r^2)H divide 2 by 3.14=.64 .64=r^2H .64/r^2=H Not sure where to go from here
November 13, 2009

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