Will someone tell me if i am right?
if a system is entirely isolated, which of the following conditions apply?
a. q = 0, w = 0
b. q > 0, w < 0
c. q > 0, w = 0
d. q = 0, w < 0
i thinks its b?

i had this question and the answer was 3.15 miles.

martina travels from school to her mom's office. from there, she walks to school. after school, she walks to the library and then to a friends house before finally ending back at home. find martina's total distance traveled.

a) 0 miles  

b) 0.4 miles  

c) 1 mile  

d) 3.15 miles