A student is measuring the circumferences of pine trees for an experiment. She measures 50 trees using a ruler that measures to the nearest centimeter.
Which statement describes a change that could help improve the results of
her experiment?

This chart shows characteristics of three different types of waves. which statement is best supported by the information in the chart? wave x and wave y are mechanical waves, and wave z is an electromagnetic wave. wave x and wave y are electromagnetic waves, and wave z is a mechanical wave. wave x and wave z are electromagnetic waves, and wave y is a mechanical wave. wave x and wave z are mechanical waves, and wave y is an electromagnetic wave.