B. If the plant is 128 centimeters tall on the ninth day, how tall was it just before the experiment began?

Jude is making cement for a driveway. the instructions show the amount of each ingredient to make 1 batch of cement. complete each statement to adjust the ingredients for each new situation if jude uses these instructions.

An ant travels at a constant rate of 30cm every 2 minutes. at what speed does the ant travel per minute

Ineed the solution to this problem and the steps.