Answer:
The total amount of money paid for all the tickets purchased in the first two hours be $13475 .
Explanation:
As given
A museum opened at 8:00 a.m. In the first hour, 350 people purchased admission tickets.
Each admission ticket cost $17.50.
Money collected in first hour from admission ticket = 350 × 17.50
= $ 6125
In the second hour, 20% more people purchased admission tickets than in the first hour. Each admission ticket cost $17.50.
20% is written in the decimal form

= 0.20
More people purchased admission tickets = 0.20 × 350
= 70
Total people purchase admission ticket in second hour = People purchase addmission ticket in first hour + More people purchased admission tickets
Total people purchase admission ticket in second hour = 350 + 70
= 420
Money collected from admission second hour = 420 × 17.50
= $ 7350
Total amount of money paid for all the tickets purchased in the first two hours = Money collected in first hour from admission ticket + Money collected from admission ticket second hour
Put the value in the above
Total amount of money paid for all the tickets purchased in the first two hours = $6125 + $735
= $13475
Therefore the total amount of money paid for all the tickets purchased in the first two hours be $13475 .