Before the start of professional soccer games, the balls must be inflated to a pressure of 13 psi with an absolute error of 0.5 psi. Find the minimum and maximum acceptable air pressures for soccer balls.

Minimum: Maximum:

We can write an absolute value equation for this situation, then solve

|*p* – 13| = 0.5

*p *– 13 = 0.5 or *p *– 13 = -0.5

*p* = 13.5 or *p* = 12.5