Adding a catalyst to a reaction has an effect similar to a. decreasing pressure. b. increasing concentration. c. lowering the concentration. d. adding water to a reaction.

their crystal patterns have been disrupted by stress

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