Problem Olivia has a 20-meter-long fence that she plans to use to enclose a rectangular garden of width w. The fencing will be placed around all four sides of the garden so that its area is 18.75 square meters. Write an equation in terms of w that models the situation.

The answers would be the following:

A. both have a crest and a trough

C. Both can move through matter

D. Both can occur as a result of a disturbance.

For choices A and D, these are characteristics of ALL types of waves. The crest is the highest point of a wave and a trough is the lowest point of a wave. The definition of a wave is a disturbance that transfers energy from one point to another.

Now for B, both can move through matter. The main difference between these two is that mechanical waves move through matter generally, or they cannot occur without a medium. Electromagnetic waves on the other hand can move through matter but it can also move through empty space.