## Precalculus: Mathematics for Calculus, 7th Edition

a. $\mid$100$\mid$ Since 100 is greater than 0, the absolute value is positive. $\mid$100$\mid$ = 100 b.$\mid$-73$\mid$ Since -73 is less than 0, we multiply it by a -1 $\mid$-73$\mid$ = -(-73) = 73