Answer :
20 because the original
40W
40(0.5) > because you must convert the w to 0.5
20 > you do 40 times 0.5 and it equals 20
your answer is 20
20 because the original
40W
40(0.5) > because you must convert the w to 0.5
20 > you do 40 times 0.5 and it equals 20
your answer is 20