The fastest train in the world moves at 500 km/ hour how far will it go in 3 hours

If it goes 500 kmh/hr, then we do 500 x 3

it would go 1500kmh/hr

All you need to do is multiple 3 by 500 and you get 1500 km/h

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

because if the tool that you are using is not balanced it there would be false mass.