The student has effectively used key terms and variables, and has provided clear definitions and explanations when they are first introduced. The main concepts of modeling, geometric sequences, and differentiation are well-described in the introduction. Additionally, the student has employed multiple forms of mathematical representation such as formulae, diagrams, tables, charts, graphs, and models where appropriate. Furthermore, all mathematical calculations are explained, and any data presentation is described. However, the student needs to ensure that the degree of accuracy is stated for any rounded values and to round results only at the end of the calculations thread.
