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

x = 25

step-by-step explanation:

a^2+b^2=c^2

7^2+24^2=c^2

49+576=625

sqrt625=25

x=25

answer: 819.89 miles across america

step-by-step explanation: