Answer:
327
Explanation:
To calculate how much Francisca and Elizabeth will raise together, we need to know how many laps or miles they walked. Unfortunately, the problem doesn't provide us with that information.
However, we can calculate how much each girl will raise individually.
Francisca will walk for 3 hours which is equal to 6 half-hours. She raises $25.50 every half-hour so she will raise:
$25.50 x 6 = $153
Elizabeth will walk for 3 hours which is equal to 12 quarter-hours. She raises $14.50 every quarter-hour so she will raise:
$14.50 x 12 = $174
Therefore, Francisca and Elizabeth will raise a total of:
$153 + $174 = $327