The half-life of a certain radioactive material is 71 hours. an initial amount of the material has a mass of 722 kg. write an exponential function that models the decay of this material. find how much radioactive material remains after 17 hours. round your answer to the nearest thousandth.

F(x)=x/2-2 and g(x)=2x^2+x-3 find (f+g)(x)

If (17, 4) is an ordered pair of the inverse of f(x), which of the following is an ordered pair of the function f(x)? a. (17,4) b. (4.17) c. (4,0) d. 0,17)

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.