I can’t find the way to solve it or to write it down on the computer

Which matrix multiplication is possible?

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.

Adam used 1072.4 gallons of water over the course of 7 days. how much water did adam use, on average, each day?