What is the significance of einstein's famous equation e = mc2?

a) energy is not related to mass.
b) mass can be destroyed.
c) energy can be destroyed.
d) mass and energy can convert to one another.

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