Is x-3^2 linear or non-linear

Mustafa contributes 11% of his $67,200 annual salary to his 401k plan. what is his pretax income

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.

Given: m∠ adb = m∠cdb ad ≅ dc prove: m∠ bac = m∠bca lol