Hurry need help in a test.

Does anyone know how to solve and graph this: 4 + | a + 2 | < 7the only part i don't get is the "4 +"

Aball is dropped from a height of 10m above the ground. it bounce to 90% of its previous height on each bounce. what is the approximate height that the ball bounce to the fourth bounce?

Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.