Answer:
3/12= 1/4
Step-by-step explanation: because you would add the all up for 12 and you have a 3 vanilla's so 3/12= 1/4
on day one height=2cm
day 2 height = 4cm=2+2 cm
day 3 height =6 cm =4+2 cm
let height of plant after d days is given by H
so H = 2d cm