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# Leroy Johnson

• ### How does regrouping actually work?

I understand how to use the process of regrouping to solve a subtraction problem, but I do not understand how this process actually works. How does borrowing 10 from a 7 in the hundreds place render that 7, which was actually worth 700, a 6 -- or, as it is actually worth, a 600 (shouldn't it become 690 if we're borrowing 10 from it?), and why do we always borrow 10 anyway? Anybody who cares to explain the answers to these questions would be appreciated.

• ### Can somebody explain to me what bonds are?

Trying to learn about finance, and I keep running into the term "bond." In an article in "The Wall Street Journal," I read that China owns a large share of "treasury bonds" that the United States has issued. Without referring me to Wikipedia, can somebody tell me what a bond is? And how does the United States, a country, issue them to another country (I thought bonds were something that companies sold)?

• ### How are remainders indicated on a calculator?

When I divide 492 by 8 on a calculator, I get "61.5." Is whatever comes after the decimal -- in this case, the 5 -- the remainder?

• ### How is 492 divided by 8 not 61.4?

I tried to find the answer to "48 divided by 8" by multiplying 8 by higher and higher numbers till I got as close to 492 as possible. 61 multiplied by 8 gave me 488, while 62 multiplied by 8 gave me 496; so I decided that the answer was 61 with a remainder. The remainder, I assume, would be the difference between 492 and to 488, which is 4. But when I did this division problem on my calculator, I got 61.5. Can somebody explain this?

• ### How does shooting a film at 24 frames per second make it seem slower?

I just read an article in "The New York Times" about a push by film directors James Cameron and Peter Jackson for films to be shot at 48 frames per second, as opposed to the standard 24 frames per second. The latter method, according to the "Times," is what slows down movies and gives them their "otherworldly" quality. My question: how does shooting a film at 24 frames per second make it seem slow, or otherwordly? The soundtrack is not slowed down (words spoken by characters, for example, are recorded and experienced exactly as they were uttered), it completely aligns with the speed of the movie -- so how is a movie shot at 24 frames per second in any way slow? I don't get it.

• ### What are the major branches of math?

I am interested in gaining a complete knowledge of math. What are the major branches that I need to pursue?

• ### Is computer programming distinct from computer science?

I am reading about computer science, and I keep running into numerous terms -- like computer programming, software engineering, software development, and many others. Are these things distinct from computer science as a field of study, or do they all belong to the same general field of study? If the latter, what is the name of that general field of study?

4 AnswersProgramming & Design10 years ago
• ### What is a financial instrument?

I have looked it up on Wikipedia, but would appreciate further information from anybody who knows a bit about finance.

• ### Why is the 1st century BC also known as the "last century BC"?

I was reading the article about the 1st century BC on Wikipedia, and in the opening sentence it said that the 1st century BC is also known as the "last century BC." Now, since the words "first" and "last" are totally antithetical to each other, this does not make sense to me. History buffs: why is the 1st century BC also known as the "last century BC"?

• ### What is the greatest rock band ever?

Why?

16 AnswersRock and Pop10 years ago
• ### What are the five most essential rock albums?

I'm interested in becoming more familiar with rock music (not Beatles-type rock music, with which I'm already quite familiar, but AC/DC-type rock music). I do not, however, really know where to start; and so I'd like to know what rock fans consider the five most essential rock albums. Thanks.

11 AnswersRock and Pop10 years ago