What is the volume of 1/4 of a sphere

Rearrange the formula c^2 = a^2 + b^2 for b

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.

What term makes it inconsistent y=2x - 4 ?