exam Maths Puzzle Numerical Ability

PLEASE HELP:
5. Evaluate. |-19| - |-5|
A) -24
B) -14
C) 14
D) 24

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exam Other Question

(3 and 2 second power) (-4 and 2 second power) Marla begins waling at 3 mi/h toward the library. Her friend meets her at the halfway point and drives her the rest of the way. The distance to the library is 4 mi. How many hours did marla walk?