November 27, 2015

Posts by Keira

Total # Posts: 22

calculate the volume of concentrated 4M HCl that is needed to create a 1 L solution of 0.1 M HCl.
January 28, 2015

Mary’s yard is a mess. She needs to hire someone to prune her trees and shrubs. A landscaping service she calls quotes her a price of $15 consultation fee plus $8 an hour for the actual work. Mary’s neighbor has offered to help her out. She doesn’t charge a ...
February 7, 2013

a)Plated Ni and Ag at 2.98 V b)Plated Ag and Zn at 1.98 V c)2.10/107.868/2*65.38=0.64g zn this is proven
June 3, 2012

how can you find points of a tri equation at orgin 1/4, 1/2, 3/4, and end of the period
May 20, 2012

if you had 3.00 g in the question 3.00g(mol/g108)(1molZn/2)(65g/mol)= 0.91g
March 7, 2012

F is the center of the circle, and L is the intersection of the ray with the circle, and assuming the circle has a radius of at least 6cm, the answer is 2. If the radius is less than 6cm, the answer is 1.
October 27, 2011

Organic Chemistry
September 18, 2011

Which term describes an organism's ability to maintain a stable internal environment? (1) reproduction (2) extinction (3) locomotion (4) regulation
May 3, 2011

I realised my mistake
March 3, 2010

Help me on this one :( Express y= (7-3x-x^2)/[((1-x)^2)(2+x)] in partial fractions. Hence, prove that if x^3 and higher powers of x may be neglected, then y=(1/8)(28+30x+41x^2) I did the first part of expressing it in partial fractions. (Since it's very difficult to type ...
March 3, 2010

Math (inequalities)
1)Each packet must have at least 20 gold stars = x > or equal to 20 2)Each packet must have at least 15 silver stars = y > or equal to 15, is this correct? 3)The total number of stars in each packet must not be more than 60 = x+y < or equal to 60, is this correct? 4)x...
July 1, 2009

Reiny (this was the one you helped me with)
I tried to explain it by using the arrangement of billiard balls, but I guess you don't play pool. let me try to "draw" the billiard balls . . .o . . o o . .o o o . o o o o o o o o o o sum of one row = 1 sum of two rows = 3 sum of three rows = 6 sum of four rows...
June 27, 2009

For Reimy
Math (Reimy) - Reiny, Thursday, June 25, 2009 at 4:46pm You are welcome Just as an afterthought... There is also a set of numbers called the pyramidal numbers, they are ... 1 4 10 20 .... Can you figure out the pattern? (Let their name be a hint.)
June 27, 2009

Math (Reimy)
Ok Reimy the question came with the ans x=3 then y=2.2, i made t he mistake and put it to two decimal places not realising tehy sequence is one, i will try to be more careful in the future. How did you come up with 20.25 to divide by 20?
June 27, 2009

complete the the table below for the fucntion y=20/x^2 for 2< or equal to x < or equal to 7. x 2 3 4 5 6 7 y ? 2.2 1.3 ? 0.6 ? When x=2, then y=4 When x =5, y =0.8 When x=7, then y=0.41 is this correct? The value of y when x=4.5, is the ans=4.4? And how do find the value...
June 27, 2009

Math (Reimy)
Yes i get it now thanks ALOT and no i dont play pool so i had no clue what the order would be.
June 25, 2009

Math (need more help Reiny)
Ok i figured out the first part that i need to square the numbers so after 4 it will be 5x5,6x6,7x7,8x8and 20x20 to make up the second column, what i dont get is the 3rd one, how do i come up with the number of white triangular shapes used?
June 25, 2009

Math (dont want ans just help figuring this out)
Length of one Total # of # of side of pattern triangular white (in cm) Shapes used triang- to make pattern ular shapes used 2 4 3 3 9 6 4 16 10 ? ? ? 6 ? ? ? ? ? ? ? ? 20 ? ? Number of gray triangular shapes used 1, 3,6,? ? ? ? ?
June 25, 2009

2nd grade Math
1 - all shapes have 4 sides and 4 corners 2 - all shapes are grey 3 - any shape with 4 sides, 4 corners which is grey 4 - any shape which does not have 4 sides or 4 corners and is something other than white or grey
January 21, 2009

I think its the frequency of the gene this is a Hardy-Weignberg problem Thanks!
November 13, 2008

Phenylketonuria is a metabolic disease of humans that results from an autosomal recessive gene. If the frequency of phenylketonurics in the population is 9/10,000, what is the probability that two normal individuals will produce a diseased child?
November 13, 2008

Algerbra 1
9b = 27?
April 25, 2007

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