Final answer:
To find the ratio of hits to misses, subtract the number of hits (20) from the total number of swings (70) to get the number of misses (50), then simplify the resulting ratio 20:50 to 2:5.
Step-by-step explanation:
The question is asking to find the ratio of hits to misses for a baseball player who swings at the ball 70 times and hits 20 times. First, we need to calculate the number of misses. Since the player has swung 70 times and hit the ball 20 times, the number of misses would be 70 swings minus 20 hits, resulting in 50 misses. Therefore, the ratio of hits to misses is 20 hits to 50 misses. This ratio can be simplified by dividing both numbers by their greatest common divisor, which is 10, resulting in a simplified ratio of 2 hits to 5 misses.