A 120-watt light bulb uses about 0.1 kilowatt of electricity per hour. if electricity cost $0.20 per kilowatt hour, how much does it cost tp have the bulb on for an hour?

Asunflower was 20 1/2 inches tall. over the next 6 months, it grew to a height of 37 inches tall. what was the average yearly growth rate of the height of the plzzz write a proportion i will give you 100 points