Answer
Find out the how many miles did he drive .
To prove
Formula

As given
Adam's father drove his car at a speed of 65.2 miles per hour to go to a business conference.
If his trip took 1.8 hours
Put
speed = 65.2 miles per hour
Time = 1.8 hours
Put in the formula

Distance = 65.2 × 1.8
Distance = 117.36 miles
Adam's father drive 117.36 miles .
Hence proved