Answer:
52 miles per hour
Step-by-step explanation:
455 miles in 8 hr 45 min =
455 miles in 8.75 hours
8.75(x) = 455(1)
x = 52
DF = 14
Andrew was wrong in the assumption that DE = EF
Segments of tangents to a circle from the same external point are congruent
That is
EF = FG = 8
Then
DF = DE + EF = 6 + 8 = 14
Answer: 90
6 + 8x