3volt,0.25,R1,4ohms, R2,2ohms, R3,0.5A, R4,3ohms,0.25volt, calculate the value read by the voltmeter across the R2, Calculate the value of R3, Calculate the total resistance

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