Which temperature scale does not have negative values?

fahrenheit temperature scale.
none of the temperature scales has negative values.
kelvin temperature scale.
all of the temperature scales have negative values.
celsius temperature scale.

when a device is used in a circuit in which the voltage is 81 v, the current flowing through the device is 3 a. what is the resistance of the device?

a. 27 ω

b. 40.5 a

c. 243 ω

d. 243 a

the correct answer is a. 27

its a circle not a square that's simple silly.

explanation: