What error did Alan make? He substituted 45 for F instead of –7 and should have found the answer to be degrees Celsius. He did not combine within the parentheses first before multiplying and should have found the answer to be degrees Celsius. He multiplied 45 by the fraction incorrectly and should have found the answer to be 49 degrees Celsius. He divided 5F by 9 before subtracting 32 and should have found the answer to be degrees Celsius.

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.