1) you are assigned to read war and peace for your literature class. the edition you have contains
1232 pages. you time yourself and estimate that you can read 12 pages in one hour. you have 5
days before your exam on this book. will you be able to finish reading it before the exam?

This actually happened to me in sixth grade; I think it was Tale of Two Cities.  We had been practicing speed reading with some crazy machine that projects text on the wall with a moving window that only shows a few words.  I could go really fast, so I calculated I could read the book in a few hours.  After a couple of minutes of trying to read at my supposed rate I faced the fact that I had no idea what the book was about so far.  Anyway,

Rate  = 12 pages/hour

1232 pages / (12 pages per hour) = 102 2/3 hours

You have five days, 5(24)=120 hours, to read that.  Theoretically you could do it. You probably have other things to do over that time as well, like eat and sleep and go to other classes.  So you're not going to finish.

You should get the Cliff notes and read them.  Or just read the first chapter, the last chapter and hope for the best.

i did it myself and i got 4.2 (b) hope its right

step-by-step explanation:

when functions are first introduced, you will probably have some simplistic "functions" and relations to deal with, usually being just sets of points. these won't be terribly useful or interesting functions and relations, but your text wants you to get the idea of what the domain and range of a function are. small sets of points are generally the simplest sorts of relations, so your book starts with those.

step-by-step explanation:

state the domain and range of the following relation. is the relation a function?

{(2, –3), (4, 6), (3, –1), (6, 6), (2, 3)}

the above list of points, being a relationship between certain x's and certain y's, is a relation. the domain is all the x-values, and the range is all the y-values. to give the domain and the range, i just list the values without duplication:

domain: {2, 3, 4, 6}

range: {–3, –1, 3, 6}

(it is customary to list these values in numerical order, but it is not required. sets are called "unordered lists", so you can list the numbers in any order you feel like. just don't duplicate: technically, repetitions are okay in sets, but most instructors would count off for this.)

while the given set does indeed represent a relation (because x's and y's are being related to each other), the set they gave me contains two points with the same x-value: (2, –3) and (2, 3). since x = 2 gives me two possible destinations (that is, two possible y-values), then this relation is not a function.

note that all i had to do to check whether the relation was a function was to look for duplicate x-values. if you find any duplicate x-values, then the different y-values mean that you do not have a function. remember: for a relation to be a function, each x-value has to go to one, and only one, y-value.

state the domain and range of the following relation. is the relation a function?

{(–3, 5), (–2, 5), (–1, 5), (0, 5), (1, 5), (2, 5)}

i'll just list the x-values for the domain and the y-values for the range: