A farmer is planning how to use the land in a rectangular field. The rectangle shown represents the field.


Part A) If half of the field is used to grow crops, what is the area of the portion of the field that has crops growing? Show every step of your work. (2 points)

Part B) Write the final answer in scientific notation with the correct number of significant digits, and label with the correct units. (1 point)

Part C) Explain how you chose the number of significant digits in the final answer. (1 point)