What are potential sources of error in Marta's
experiment?

She only looked at the results for lunch and no other meals. She did not define what “healthy” means. She tested a different number of girls and boys and did not factor that into her results. Her study is biased.

Explanation:

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