Answer:
1.5 if you Evaluate and in fraction form 
<span>A) Goats that weigh exactly 50 or 60 pounds fall into two classes. would be the right answer</span>
The second answer i think is the best one
Answer: A, If it is Tuesday, Marla has a piano lesson.
B. is implying that they don’t cancel any lesson at all for any reason
C. is implying that they cannot reschedule a lesson for a different day
D. is implying that Marla cannot play piano at all unless it is for a lesson