alice-teacher question regarding bits and bytes!

[Aurelia Smith]

No, the key is correct. You calculated BYTES correctly, 12,288. Since 8
bits per byte the 98,304 is correct for bits.


On Wed, Mar 5, 2014 at 1:30 AM, Sandy Graham <sandyg at gvtc.com> wrote:

>  The book I just started has this question:
>
> "If a picture was made up of 64 possible colors, how many bits would be
> needed to store each pixel of the picture?"
>
> I thought RGB values would be required so was trying to figure out an
> answer from that (though the book doesn't give much information on how to
> do that exactly), but the answer key says the answer is 6. I can see that
> 2^6 = 64 and assume that's where the 6 came from, but why is that the
> answer? How does 6 bits yield 64 possible colors? Don't RGB values have to
> be considered?
>
>
>
> Then the next question asks, "How many bits are there in 12 KB?"
>
> So 12 * 2^10 = 12,288, right? I'm pretty confident of my answer, but I
> wanted to double check with a reliable source as the answer key says 98,
> 304 is the correct answer. The key is wrong, right?
>
>
>
> Thanks! I didn't know where else I could get a reliable answer to this!
>
> Your sister in Christ,
>
>
>
> Sandy Graham
>
>
>
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