How is radioactivity produced

Explanation:

It is a physical observed phenomenon, where an atom is emitting type of particles such as, alpha or beta followed by gamma radiations, which change the radioactive atom.

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