Answer:
M(t) = -3(t - 16)(t - 3)
Step-by-step explanation:
The correct answer is a, I have just completed that portion of the workbook that I'm assuming your are working on as well. There is also another question below the one you asked in the actual workbook so if you need an actual explanation for this answer or you want my help fo another question just let me know in the comments below.