Rules require that the air pressure inside a football must be within 0.5 pound per square inch (psi) of 13 psi.
a. Which inequality can be used to find the least and greatest air pressures that meet the requirement? Use the inequality to find these air
pressures.
A
2-0,5≤13
B 2-13 ≤0.5
The least allowable air pressure is psi.
The greatest allowable air pressure is psi.
C
between psi and [ psi
|x-13| ≤ 0.5
D 2-13 ≥ 0.5
b. A football is deflated to 11.2 psi. How much air must be added for the football to meet the requirement?