Answer :
Final answer:
The final speed of the softball is 90 km/hr.
Explanation:
To answer the given question, we need to calculate the final speed of the softball. We know that the initial speed of the softball is 100 km/hr and it slows down by 10 percent. To find the final speed, we can multiply the initial speed by 0.9 (1 - 10%).
Final Speed = Initial Speed × (1 - 10%)
Final Speed = 100 km/hr × 0.9
Final Speed = 90 km/hr
Therefore, the correct option is A) 90 km/hr.