Using a centrifuge is a faster way to make occur.
a. settling
b. filtration
c. distillation
d. evaporation

A. settling

Explanation:

The centrifuge is a laboratory equipment that uses the centrifugal force created by circling around an axis as a form to make settling faster.

The tube with the sample, usually a liquid is placed in the centrifuge so that it starts to revolve and the solid part settle at the bottom of the tube.

Some uses for this is the separation of elements of some liquid sample, which has applications in chemistry, biology and other sciences.

c. 7/3

step-by-step explanation:

a rational number is like pi- it is a repeating decimal.

a. is -1.8

b. 2.236068

c. 2.3333333333333333333

d.   is 3

i hope that ! =)