Sunday
September 21, 2014

Posts by Fidelia


Total # Posts: 13

math
5. A rubber ball dropped on a hard surface takes a sequence of bounces, each one 3/5 as high as the preceding one. If this ball is dropped from a height of 15 feet, what is the total distance it has traveled after it hits the surface the fifth time? The answer is 54 and 21/125...
May 31, 2007

algebra
Okay, how do you factor a polynomial when there is a number in front of the highest x term. For example: how would you factor 2x^2-11x+15 i know the answer is (2x-5)(x-3), right? So you put the 2x on one side and then you put an x on the other. And then you know that 15*2=30, ...
May 15, 2007

chem
Although CHsubscript4 has 4 hydrogens, it is an acid. Why? It is NOT an acid. Did you make a typo or misread your notes/question? It isn't an acid because CH4 is not a proton donor. sorry, that's what i meant-why isn't it an acid?
May 14, 2007

history
The Korean War, Cold War, and Vietnam war were mainly about fighting communism. Would you say WWII was also? WW11 was not about Communism. I am not sure that Korea or Vietnam were about Communism either. The Chinese were not involved in the Korean war until after the UN came ...
April 8, 2007

english
Does this sentence make sense?: A highly informative book, Marc Aronson wrote Witch-Hunt Mysteries of the Salem Witch Trials. or does it make it seem as though Marc Aronson is the highly informative book (which he's not)? Thanks for the help! can u write it like this...&...
April 1, 2007

algebra
Can someone please tell me if I did this problem right? A new truck that sells for $29,000 depreciates 12% each year. Write a function that models the value of the truck. Find the value of the truck after 7 years. my answer=p(x)=price of truck ($) p(x)=29000(.88)^x value of ...
March 29, 2007

chem
How do you balance this equation?: (NH4)2SO4+Ca(OH)2==>CaSO4+NH3+H20 Thanks! 2 NH3 2H2O Others are ones. (NH)2SO4 + Ca(OH)2 --> CaSO4+2NH3+2H2O Thanks!
March 22, 2007

chemistry
Can someone please check my work on this problem? That'd be great!: What is the balanced equation for the chemical change of adding Na2CO3 to CuCl2, therefore making CuCO3 form? CuCl2+Na2CO3-->CuCO3+2NaCl right thank you fill in the blanks! Nuclear reactions involve the...
March 6, 2007

chemistry
Please, will someone help me balance this equation? There's always one element I just can't seem to balance. Cu+HNO3===>NO2+Cu(NO3)2+H20 Thanks for the help. Try this. Cu + 4HNO3 ==> 2NO2 + Cu(NO3)2 + 2H2O You're a genius! Do you think you could tell me how ...
March 5, 2007

history
When were US children required to go to school? The earliest compulsory education was in Massachusetts Colony in the 1640s. Thereafter each colony and state enacted its own required school attendance laws. By 1918, all states required children to at least complete elementary ...
February 3, 2007

chem
Are aspirin, starch and dextrose covalent or ionic? Do aspirin and or epsom salt conduct electricity? Any help with these questions would be greatly appreciated. Thank you! I have been told by more than one person that aspirin often is sold as the sodium salt; however, aspirin...
February 1, 2007

history
Can someone please tell me some important dates in the US in the 1800s? Please and thank you. http://www.google.com/search?as_q=us+history+1800%27s&hl=en&num=10&btnG=Google+Search&as_epq=&as_oq=&as_eq=&lr=&as_ft=i&as_filetype=&as_qdr=all&as_nlo=&as_nhi=&as_occt=title&as_dt=i&...
January 28, 2007

chemistry
Can someone please help me with these? How many electrons would Nitrogen, Aluminum, and Bromine gain or lose? Look at the periodic table and find N, Al, and Br. You should find N in group VA (or 15 depending on the system being used), Al in IIIA (or 13), and Br in VIIA (or 17...
January 23, 2007

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