Wednesday
March 29, 2017

# Posts by pedro

Total # Posts: 71

Chemistry
What is the total number of mole of atoms in 1 mole of Al2(CO3)3?
December 12, 2016

Math
Determine the number of combinations on a bicycle lock that has a 3-digit number combination with only 3 numbers where the numbers can be repeated to open the lock
September 8, 2016

Math
7.6×10^6 in standard. Form
August 31, 2016

Math
Sentence for describe a situation that can be modeled with the ratio 8 to 3
August 26, 2016

geometry
line jk bisects mn at point j find mn if jm = 6 3/4 feet
June 9, 2016

clinical psychology
whats is a timeline and milestones in clinical psychology subject?
March 30, 2016

math
Mr.Jacobs budgeted \$1,200 for tiles.His sketch of the floor requires him to use 38 white tiles.Each white tile costs \$12.Write and solve an inequality to find the maximum amount he can spend on brown tiles.
March 9, 2016

MATH
4y+6y=21, 7x-3y=3?
February 9, 2016

math
Describe a situation that can be modeled with the ratio 8 to 3
November 11, 2015

physics
A bullet is fired straight up from a gun with a muzzle velocity of 217 m/s. Neglecting air resistance, what will be its displacement after 9 s? The acceleration of gravity is 9.8 m/s2 .
September 22, 2015

math
You are asked to calculate gas mileage for a car, and your answer comes out with units of gal/mi. This means that
September 20, 2015

math
The exterior surface of a cylinder with a circumference of 2 feet and a length of 5 feet (and no end caps) is the same as the area of
September 20, 2015

math
A small grill can hold two hamburgers at a time. If it takes 10 minutes to cook one side of a hamburger, and 5 minutes to cook the other side, then what is the shortest time needed to cook both sides of three hamburgers? (HINT: You are allowed to cook one side of a hamburger ...
September 20, 2015

Math
A B B B
March 2, 2015

accounting
Halifax Manufacturing allows its customers to return merchandise for any reason up to 90 days after delivery and receive a credit to their accounts. Halifax only makes credit sales. The company began 2013 with an allowance for sales returns of \$300,000. During 2013, Halifax ...
October 29, 2014

math
Can you write3+5+6=14 as a multiplicacion sentence? Explain.
October 28, 2014

Physics
a kid jumping on a trampoline reaches a height of 0.925m what was his speed when he left the trampoline
October 27, 2014

How does this excerpt prove that Odysseus causes his crew’s demise? by explaining his haphazard travels by describing his loyalty to Zeus by showing his physical weakness by revealing his ignorant assumptions
September 26, 2014

Probability
c= 1/128 P(Y<X)= 83/128 P(Y=X)= 1/32 P(X=1)= 10/64 P(X=2)= 17/64 P(X=3)= 0 P(X=4)= 37/64 E[X]= 3 E[XY]= 227/32 VAR(X)= 3/2
March 7, 2014

statistics
a)diagrams -p1 -(p2)- end -(p3)- end b)-(p1)-(p2)- end -(p3)----- end
February 17, 2014

statistics
With f the probability of fail a) First branch: f1=(1/3)*(1/3) Second branch: f2=1/3 Thus: The probability of success of the system is:(1-(1/3)*(1/3))*2/3 =2/3*(1-1/9)=(2*8)/(3*9) b) First branch: f1= 1-(2/3)*(2/3)=5/9 second branch f2=1/3 Thus: The probability of success of ...
February 17, 2014

probability
P(A) = 4/9 P(B) = 0.9375 P(A?B)= 4/9 P(C) = 0 P(D) = 3/4 P (A?D) = 11/36
February 7, 2014

science
(4*n-6)/(n*(n-1))
February 6, 2014

finance
865.13
November 4, 2013

MATH
If there are 1 billion six hundred and forty thousand shares in circulation, and my mate says he owns 0.042% of the shares, how many shares does he hold?
September 26, 2013

CUMIUNITI
In which year did the relationship between Britain and the colonies begin to change dramatically?
September 18, 2013

math
john saw 24 animal at a pet store 14 dogs and 3 hamsters. how many more animals should he see?
December 6, 2012

math
33x650x-43
October 22, 2012

algebra
Find the vertices and foci of this ellipse 4x^2+16y^2+64x+64y+256=0
July 10, 2012

math
the area of a square is 49 square inches. find the number of inches in the length of a diaganol. express your answer in simplest radical form.
March 9, 2012

algebra
Lisa is planning to put a border around the edge of a circular table. She needs to know how long the border needs to be so that she can buy the material. Which measurement does Lisa need?
January 31, 2012

math
a piece of fabric is cut into 12 equal lengths with 3 inches left over. Define a variable, and write an expression for the length or the original piece.
September 29, 2011

statistics
N(373,67) means the distribution is a normal distribution with mean = 373 and the variance = 67 (standard deviation = square root of 67).
September 12, 2011

History......Help
Which of the following best describes the econmic trends of the 1920s?
March 29, 2011

Math
For the sequence, describe the pattern, write the next term, and write a rule for the nth term. 2/3,4/4,6/5,8/6,...
March 1, 2011

corporate finance
Can't answer without knowing the 2020 market price.
February 22, 2011

Chemistry
If mixing baking soda, (NaHCO3) with vinegar (CH3COOH) to generate carbonic acid (H2CO3), which breaks up into water and carbon dioxide gas) and sodium acetate (NaCH3COO), would the equation be: NaHCO3 + CH3COOH yields H2CO3 + NaCH3COO
February 3, 2011

math
y^2 fifth root of 64x^6 - 6 fifth root of 2x^6y^10
February 2, 2011

Math
For a model rocket, the altitude h in meters, as a function of time t, in seconds, is given by h=68t-8t^2. after how many seconds will it hit the ground?
December 11, 2010

Almeida
The two largest diner chains in Kansas compete for weekday breakfast consumers. The two chains, Golden Inn and Village Diner, each offer weekday breakfast customer a â��breakfast clubâ�� membership that entitles customers to a breakfast ...
December 7, 2010

chemistry
Zinc + Hydrochloric acid --> Znic Chloride + Hydrogen Sodium hydroxide + sulfuric acid --> sodium sulfate +water Sodium + Hydrogen --> sodium hydride 2CH3COOH + Cu --> (CH3COOH)2Cu + H2
December 5, 2010

chemistry
Predict the products of the chemical reaction aluminum + iron(III) oxide
December 5, 2010

physics
The gravitational energy decreases. because P.E.= m*g*h
December 5, 2010

Physics
a= F/m =16/0.5 =32m/s v²=2*32*5 v =17.9 But I get 17.9m/s..... acceleration is equal to net force over mass or just force over mass? Anything wrong with my steps? Can I minus 17.9 by 5N which is the friction?
December 5, 2010

Chemistry
Write the word equations below as chemical equations and balance. copper + sulfuric acid yield copper(II) sulfate+ water + sulfur dioxide
December 1, 2010

Algebra
using synthetic subsititution to evaluate the polynomial functuion for the given value of x. h(x)= -8x^3+14x-35; x=4
November 29, 2010

Chemistry
is it a double replacement?
November 26, 2010

Chemistry
What kind of reaction is it when the reactants produce carbon dioxide and water
November 26, 2010

Algebra
At a flea market held each weekend, an artist sells handmade earrings. The table below shows the average number of pairs of earrings sold for several prices. Given the pattern in the table, how much should the artist charge to maximize revenue? Table: price: \$15 \$14 \$13 \$12 ...
November 17, 2010

mass: 2.04 molar mass of MgSO4: 24.3+32.1+16*4=120.4 moles= 2.04/120.4 = 0.0169mol
November 4, 2010

physics
Find the angular speed of the Earth as it spins about its axis. Give your result in rad/ses
November 2, 2010

physics
express the angular velocity of the second hand on a clock in rev/hr
November 2, 2010

physics
A 94- astronaut and a 1200- satellite are at rest relative to the space shuttle. The astronaut pushes on the satellite, giving it a speed of 0.25 directly away from the shuttle. Seven-and-a-half seconds later the astronaut comes into contact with the shuttle.What was the ...
October 31, 2010

geometry
the arc lenght of sector is 5 pie. If the circle has a radius of 18 cm, what is the measure of the central angel of the sector?
April 21, 2010

physics
An artillery shell is fired at an angle of 67.1◦ above the horizontal ground with an initial speed of 1580 m/s. The acceleration of gravity is 9.8 m/s2 . Find the total time of flight of the shell, neglecting air resistance. Answer in units of min.
November 19, 2009

Algebra
plane ascends at a 40° angle. When it reaches an altitude of one hundred feet, how much ground distance has it covered? To solve, use the trigonometric chart. Round the answer to the nearest tenth.
October 9, 2009

Computers
//program that puts two lists in order in one single list with all the numbers in order import java.util.Scanner; public class listOrder { public static void main (String [] args){ int [] list1; int [] list2; int [] list3; int temp; list1 = new int [10]; list2 = new int [10]; ...
October 1, 2009

Computer Science
//program that puts two lists in order in one single list with all the numbers in order import java.util.Scanner; public class listOrder { public static void main (String [] args){ int [] list1; int [] list2; int [] list3; int temp; list1 = new int [10]; list2 = new int [10]; ...
October 1, 2009

English
need a spesch
July 3, 2009

. Leng Xiong is unable to reconcile the bank balance at January 31. Leng’s reconciliation is shown here. Cash balance per bank \$3,660.20 Add: NSF check 370.00 Less: Bank service charge 25.00 Adjusted balance per bank \$4,005.20 Cash balance per books \$3,975.20 Less: ...
September 29, 2007

chemistry
use the properties of sodium cyanide described above to deduce the type of bonding that holds this compound together, explaining in 1 or 2 short sentences how you arrived at your conclusions. Write a balanced chemical equation for the reaction that occurs when sodium cyanide ...
March 7, 2007

chemistry
state noble gas whose electron configuration is attained in a lewis structure for hydrogen cyanide and noble gas attained in lewis structure for cyanogen? I have answered this several times but at times it really wasn't an answer. I am not familiar with discussing ...
March 7, 2007

chemistry
a drop of oil (volume 0.05cm3) is released from a medicine dropper on to the calm surface of a pond where it spreads out to cover an area of 40cm2. Assume that the oil film has a uniform thickness equal to the diameter of an oil molecule. CALCULATE the diameter of an oil ...
March 7, 2007

s103
Reaction 1 O ll CH2=CH-CH-OH + CH3-CH-CH2-C l l l CH3 CH3 OH compound 1 compound 2 Products? identify any functional groups in compounds 1&2, circle them and name them clearly? complete the equation for reation 1 by drawing the abbreviated structural formula, of the products, ...
March 7, 2007

s103
Reactants O ll CH2 = CH - CH - OH + CH3 - CH - CH2 - C l l l CH3 CH3 OH compound 1 compound 2 Products? identify any functional groups in compounds 1&2, circle them and name them clearly? complete the equation for reation 1 by drawing the abbreviated structural formula, of ...
March 7, 2007

s103
the isotope caesium -137, which has a half life of 30 years, is a product of nuclear power plants. How long will it take for the amount of this isotope in a sample of caesium to decay to one sixteenth of its original amount? - explain answer 1/16 = 1/2^x 2^x = 16 Solve for x.
March 7, 2007

S103
Which element results if 2 protons and 2 neutrons are ejected from a radium nucleus with atomic number 88 and mass number 226 - show workings? What is actually ejected is an alpha particle (helium nucleus). The new atomic number is 88-2 = 86 and the new atomic weight is 226 - ...
March 7, 2007

poetry
can you reccommend 4 humourous poems by different poets http://pages.ripco.net/~mws/Poetry/24.html by Thomas Hardy http://www.silentwords.com/Humorous.html http://dir.yahoo.com/Arts/Humanities/Literature/Poetry/Poetic_Forms/Closed_Forms/Limericks/ http://falcon.jmu.edu/~...
January 13, 2007

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