Final answer:
Mr. Cruz should calculate the circumference of his circular garden to determine how much fencing he needs. The circumference is the total length around the circle, corresponding to the fence length.
Step-by-step explanation:
Mr. Cruz needs to calculate the circumference of his circular garden in order to figure out how much fencing he will need. The circumference of a circle can be found using the formula C = 2πr, where r is the radius of the circle.
In the case of Mr. Cruz's garden which has a radius of 40 meters, the circumference would be
C = 2π(40 m)
= 80π m.
This calculation provides the total length around the garden, which corresponds to the amount of fencing required.