I assume you mean one that is not rational, such as √2. In such a case, you make a reasonable estimate of it's position, and then label the point that you plot.
For example, you know that √2 is greater than 1 and less than 2, so put the point at about 1½ (actual value is about 1.4142).
For √3, you know the answer is still less than 4, but greater than √2. If both of those points are required to be plotted just make sure you put it in proper relation, otherwise about 1¾ is plenty good (actual value is about 1.7321).
If you are going to get into larger numbers, it's not a bad idea to just learn a few roots. Certainly 2, 3, and 5 (2.2361) and 10 (3.1623) shouldn't be too hard.
Then for a number like 20, which you can quickly workout is √4•√5 or 2√5, you could easily guess about 4½ (4.4721).
They're usually not really interested in your graphing skills on this sort of exercise. They just want you to demonstrate that you have a grasp of the magnitude of irrational numbers.
100%-15%=85% -- 0.85
A. doesn't work because it is increasing
B. works because your finding 85 percent since you decrease by 15 percent
C. doesn't work because you are not taking 15 percent from value of t
D. doesn't work because finging 15 percent of t and them subtracting from one won't give you the right answer
E.doesnt work because all you have to do is find 85 percent not subtract that from the original value
F.works because subtracting 15 percent from one and multiply by t would give the equation from B
So the answers are B and F
B) it will cost about the same to keep the movie or to return it; she should keep it.
5 days' worth of late fees would be 5(1.50) = 7.50.
The purchase price is 9.99; 9.99+7.50 = 17.49.
If she gets a cab, she pays around $10 round trip; 10 + 7.50 = 17.50
It is roughly the same price.
Really to answer this questions you just have to round all the numbers.
