Answer:
i think the answer is 4.65 inches tall.
Step-by-step explanation:
i attempted it this may be wrong just wait for someone to confirm it.
Find the rate in which both balls make one full rotation around the track.
Ball A:

It takes 30 seconds for Ball A to make a full rotation.
Ball B:

It takes 20 seconds for Ball B to make a full rotation.
Find the least common multiple of 20 and 30 to find the time at which they'll meet.
Multiples of 20: {20,40,60}
Multiples of 30: {30,60}
60 is the least common multiple of both 20 and 30.
The balls will meet again at
60 seconds.
Answer: Based on the study, children with higher exposure to pesticides more likely to develop ADHD
Step-by-step explanation:
If I’m correct, then the answer is D. Someone please correct me if I’m wrong.