Place least to greatest 4.5,3,9,4.25,3.75,4.2

Can you answer my question? will mark brainiest!

Svetlana's hair is 4 4 centimeters ( cm cm) long. her hair grows 1 . 5 cm 1.5cm per month. svetlana wants her hair to be less than 1 6 cm 16cm long. write an inequality to determine the number of months, m m, svetlana can allow her hair to grow so that it is less than 1 6 cm 16cm long.

Find the number of liters in 12.8 gal of gasoline. round to the nearest hundredths