The best method for separating iron fillings from saw dust would be .

a. screening
b. distillation
c. evaporation
d. magnetism

D: Magnetism

Explanation:

Separating two substances in a mixture by hand can be tedious and is often expensive due to the time it takes to sort through each individual piece. A good example is separating iron fillings from saw dust.

Large companies would often need to sort through large amounts of mixtures. Hence it would be easier to use a magnet since iron fillings are attracted to magnets and saw dust is not.

b.

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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