What is the difference between an open and closed circuit?

Open circuits allow anything in and out. Closed circuits don't allow anything in or out

Explanation:

a closed circuit has a complete path for current to flow, whereas an open circuit doesn't, which means that it's not functional.

T^T HOPE THIS HELPS

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