Final answer:
Without specific measurements given for the retaining wall, calculating the area is impossible. However, the area of a regulation basketball court can be estimated using standard dimensions to be approximately 4700 square feet.
Step-by-step explanation:
The student's multifaceted question relates to the principles of geometry, specifically the calculation of heights and areas in different contexts. Part A requires finding the height of a brick portion which likely involves algebraic methods. No information has been given to derive an equation directly for this portion. To estimate the area of the entire retaining wall in Part B, one would typically use approximate measurements of length and height. However, without actual dimensions provided for the retaining wall, a precise calculation can't be performed. In Part C, finding the area of the whole retaining wall would generally involve multiplying the wall's length by its height, but again, specific measurements are not supplied.
For the additional task of estimating the area of a regulation basketball court, one can use standard dimensions for a college basketball court, which are 94 feet in length and 50 feet in width. Multiplying these dimensions gives 4700 square feet. This mental math process involves remembering the standard dimensions and performing a simple multiplication.