PLEASE HELP THE ANSWER CHOICES I SHOWED R FOR ALL THE ANSWERS

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mechanical wave -> a wave that requires a medium through which to travel

wave -> a disturbance that transfers energy from one place to another place

medium -> the matter that waves flow through

the answer is a. hope this .

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