Identify which of the following sets of numbers the number belongs to: rational numbers, integers, whole numbers. 0.78 A. Rational Number B. Whole Number C. Integer PLZ HELP

Consider the function f(x)=−2/3x+5 . what is f(1/2) ? enter your answer, as a simplified fraction, in the box. f(1/2)=

Two variables, x and y, vary inversely, and x=12 when y=4. what is the value of y when x=3?

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.