Question

An electric heater uses 3⁄5 watts of power each hour. How many watts of power will the heater use in 1⁄2 hour?

Answer 1

Answer:

0.3 Watts

Step-by-step explanation:

We can calculate the watts per hour for one hour:

$(3/5)/1=3/5$

The electric heater uses 3/5 Watts per hour. To determine the Watts that it uses we must multiply by the number of hours it is being used, which is a 1/2 hour:

$=(3/5)\cdot{1/2}=3/10=0.3$

The electric heaters uses 0.3 Watts of power for 1/2 hour.

Answer 2

It would use half the amount of watts. 

hope it helps :)