Suppose s(t) is the position of an object moving along a line at time t is greater than or equal to 0. what is the average velocity between the times t=a and t=b? what is the instantaneous velocity at t=a?

d eras and periods

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