Lets say a train is traveling at a certain velocity v emitting a certain frequency f. will the inrease in frequency as heard by someone in front of the train be equal to the decrease in frequency as heard by someone from behind the train? explain and or prove your answer.

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

a 2,000 calorie based diet.