Question: NEED help immediately USE calculator and store values. show solution' a computer installer agreed to doo an installation for $150. it took him 2 hours

NEED help immediately USE calculator and store values. show solution'

a computer installer agreed to doo an installation for $150. it took him 2 hours longer than he expected, and therefore he earned $2.50 per hour less than inspected. how long did he expect the installation would take

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