Respuesta :

1 week=7 days
times 2
2 weeks=14 days

so 14 days
14 times 350=4900 feet

it changed by 4900ft
350 ft per day for 2 weeks....1 week = 7 days, so 2 weeks = 2*7 = 14 days

350 * 14 = 4900

so in total, it has receded 4900 ft <==