Answer:
38
Step-by-step explanation:
Given that,
x = -4
f(x)=x² - 4x +6
so,
f(-4)= (-4)² - 4 . (-4) +6
=16 +16 +6
= 38
269.1
minutes/mile
minutes=7.5-2.5
=55
55/10
5.5 minutes per mile