The prefix used for 1/100 of the base unit is . kilo milli centi deka

Centi

Step-by-step explanation:

Kilo is wrong

Kilo means 1000 or 10^3 of the base unit.

For example 1 kilometer is 1000m

Milli is wrong

Milli means 1/1000 or 10^-3 of the base unit. That is why 1000 millimeters is 1 meter

Deka is wrong

Deka means 10 multiplied by the base unit.

1 decameter is 10 meters for example

Centi is correct

Centi is an abbreviation meaning 1/100 or 10^-2 of base unit. That is why 100 centimeters is 1 meter

-14

step-by-step explanation:

2x2 – 2(x+4)

=2x2-2（5+4）

=4-2×9

=4-18

=-14