Answer:
1 lightbulb is 1.45, 20 lightbulbs are 29, and 50 lightbulbs are 72.50
Step-by-step explanation:
move the decimal point since its divided by 10 u get 1.45, if 10 are 14.50 u double it which is 29 . divide 50 by 20, 20. 10 29 +29 is 58 plus 14.50 is 72.50
