2nd time I’m asking! I don’t understand this problem if you can help I would be great full if you could help!

What is the solution to the equation 9^(x+1) =27

The number of fish in a lake can be modeled by the exponential regression equation y=14.08 x 2.08^x where x represents the year

Abarbecue sold 26 hamburgers and hot dogs. hamburgers sell for $3.50 each and hot dogs sell for $2.00 each. if the barbecue made $70 in sales, determine and state the number of hot dogs sold.