
Casey B. answered 03/27/19
Math, Science, and Writing Tutor with ESOL Endorsement
You need to first convert your measurements to cm. Since there are 100 cm in 1 meter, you would need to multiply 3 m by 100 and 4 m by 100 to get each tree's height in cm.
Then, you can compare the two heights by using subtraction to see how much taller the first tree is compared to the second tree.