Final answer:
In the scenario presented, Tony has a speed of 16 miles/hour. If he rides for 21/4 hours at this pace, he will travel a total distance of 36 miles.
Step-by-step explanation:
To solve the problem, one first needs to determine Tony's speed by dividing the distance he travels by the time it took him. In this case, Tony rides his bike 12 miles in 3/4 hour, so his speed is 12 miles / 3/4 hour = 16 miles/hour. This is Tony's normal speed.
Now, if Tony rides for 2 1/4 hours at the same speed, the distance he will cover can be found by multiplying the speed by the time. That means 16 miles/hour * 2 1/4 hours = 36 miles.
So, Tony will ride 36 miles if he continues at the same speed for 2 1/4 hours.
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