Which of the following statements is not true? All whole numbers are integers

All natural numbers are whole numbers.

All integers are whole numbers.

All fractions of the form a:b, where a and b are integers and b≠ 0, are rational numbers.
Please help I litterly have a 0

Ascientist wants to use a model to present the results of his detailed scientific investigation. why would a model be useful? a )because the model makes the concepts easier to understand b) because the model is easy to put together and to use c) because the model prevents other scientists from asking questions d) because the model requires the audience to pay full attention to it i don't know what to choose because between a and d a is much more likely than d because it only wants to get the attention of the audience. i'm confuse.

Describe a situation that you could represent with the inequality x< 17

Let f(x) = 5/x and g(x)=2x2+5x. what two numbers are not in the domain of f o g