Molly is excited to have fresh basil at home. She buys a basil plant that is 90 millimeters tall and puts it on her kitchen wind
owsill. A month later, the plant is 20 centimeters taller! One night, Molly wants to add some basil to her stir-fry, so she cuts off 12 centimeters. How many centimeters tall is her basil plant now? (I'm really sorry if I'm asking to much I have some assignments which are hard please help me)