A cup of coffee contains 130mg of caffeine. If caffeine is eliminated from the body at a rate of 11% per hour, how long will it take for half of this caffeine to be eliminated from a person's body?

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

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)

Micheal is 4 times as old as brandon and is also 27 years older than brandon. how old is micheal