Anouk does 150 j of work using a hammer to pull a nail out of a piece of wood, and the hammer does 105 j of work on the nail. what is the efficiency of the hammer? 1.4% 7% 70% 143%

70%

Explanation:

105 divided by 150 equal to 0.7.  then u multiply 0.7 by 100. equal 70.  so its C because efficiency = (effective work)/(executed work) * 100%

hope it helped :3

70%

Explanation:

105 divided by 150 equal to 0.7.  then u multiply 0.7 by 100. equal 70.  so its C because efficiency = (effective work)/(executed work) * 100%

i would say b

explanation:

but i think i would need more information than that