Least to greatest. ( − 5 x + 4 ) ( x − 3 ) = 0 (−5x+4)(x−3)=0 i ITS FOR KHAN ACADEMY PLS HURRY

Apatient is given 50 mg dose of medicine the medicines effectiveness decreases every hour at a constant rate of 40% what is the exponential decay function that models this scenario how much medicine will be left in the patients system after 2 hours

Add the two expressions 3.8b - 7 and 2.9b + 9 enter your answer in simplified form

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.