If −3 + n ≤ 25 , which inequality represents the possible range of values for 4n −12 ?

a) 4n−12≤−100
b) 4n−12≤100
c) 4n−12≥−100
d) 4n−12≥100

Martha is training for a duathlon, which includes biking and running. she knows that yesterday she covered a total distance of over 55.5 miles in more than than 4.5 hours of training. martha runs at a speed of 6 mph and bikes at a rate of 15.5 mph.