Final answer:
To find the total amount donated, add up the individual donations.
Step-by-step explanation:
To find the total amount donated by all students, we need to add up the individual donations. Since Michael donated $12, Kayla donated triple the amount which is $12 x 3 = $36, and Maryam donated double the amount Kayla donated which is $36 x 2 = $72. Adding up all the donations, we get $12 + $36 + $72 = $120. Therefore, the total amount the students donated to the food bank is $120.