a man lives on the 100th floor of an apartment building. On rainy days he rides the elevator all the way up. However, on sunny days, he goes half way and takes the stairs the rest of the way. Why?

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

it has to be b, about 97 percent.