Which list contains ONLY irrational numbers?
2 answers:
Answer:
The correct option is A.
Step-by-step explanation:
A real number is called a rational number if it can be represented as p/q, where p and q are two integers and q≠0. For example: 2,4/5, 0.2.
A real number is called an irrational number if it can not be represented as p/q, where p and q are two integers and q≠0. For example: π, √2, 2.333....
In option A, all numbers are irrational numbers.
Therefore option A is correct.
In option B,
3 is a rational numbers, so √9 is a rational number.
Therefore option B is incorrect.
In option C,
12 is a rational numbers, so √144 is a rational number.
Therefore option C is incorrect.
In option D,
11 is a rational numbers, so √121 is a rational number.
Therefore option D is incorrect.
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Answer:
Option D.
Step-by-step explanation:
Let as consider the function f(t) approximates how many pieces of furniture he paints per hour. It means unit of this function is furniture/hours.
The function w(h) represents how many hours per week Joey spends painting the pieces of furniture. It means unit of this function is hours/weeks.
We need to find the units of measurement for the composite function f(w(h)).
It the function f(w(h)), first we need to apply the function w(h) after that f(t).
The units of measurement for the composite function f(w(h)) is furniture/weeks.
Therefore, the correct option is D.