Answer:
15 in.
Use this website : http://graysonmath.com/wp-content/uploads/2018/10/HM2_6.4-Practice-Key.pdf
Step-by-step explanation:
swich the one attached to equation with the one attached to expression
an equation need to have an equals sign, an expression doesnt.
4 km
1000m:3m = 4000m:12m
the answer is B