AHH PLEASE HELP I HAVE 7 MINUTES TO FINISH THIS TEST also please add a explanation because i’m kinda confused

Liesl grew 7/12 of a foot in one year. her little sister grew 1/3 of a foot during that same year. how much more did liesl grow than her little sister did

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

For the equations below which statement is true ?