Answer:
15 miles
Explanation:
We know
Gina ran 3/4 of a mile every day after school.
3/4 = 0.75
So, Gina ran 0.75 miles every day after school.
There are 20 school days in January.
How many miles did she run in January?
0.75 x 20 = 15 miles
So, she ran 15 miles in January.