7. An electron moves at 3.0 x 107 meters per second perpendicularly to a magnetic field that has a flux density
of 2.0 teslas. What is the magnitude of the force on the
electron?
A. 9.6 x 10-19 N
B. 3.2 x 10-19 N
C. 9.6 x 10-12 N
D. 4.8 x 10-12 N

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

pretty sure it's false