keisha told her swim coach that she would swim at least half a mile. If one lap is 50 yards, what is the fewest number of laps she must swim?

I would say 18 laps;

I believe that I mile is 1,760 yards
½ mile = 880 yards
880 divided by 50 - 17.6
Please check my math.

To find the fewest number of laps Keisha must swim, we need to convert half a mile into yards and then divide by the length of a lap.

To convert miles to yards, we multiply the distance in miles by 1760 (since 1 mile is equal to 1760 yards).

So, half a mile is equal to:
0.5 miles * 1760 yards/mile = 880 yards.

Since one lap is 50 yards, we can calculate the fewest number of laps Keisha must swim by dividing the total yardage by the length of one lap:

880 yards ÷ 50 yards/lap = 17.6 laps.

Since Keisha cannot swim a fraction of a lap, the fewest number of laps she must swim is 18 laps.