12 in = 30.(48) cm this is your Answer
Answer:
The value is 
Step-by-step explanation:
From the question we are told that
The distance from Jacksonville to Miami is d = 382 miles
The time it take to travel from Jacksonville to Daytona is 
The time it take to travel from Daytona Beach to Fort Pierce is 
The time it take to travel from Fort Pierce to West Palm Beach is

The time it take to travel from West Palm Beach to Miami 
Generally the average speed is mathematically represented as

=> 
=> 
we know that
the amount
-------> represent the 
so
<u>Find the percentage of the amount
</u>
by proportion

<u>Find the percentage gain</u>

therefore
<u>the answer is</u>
The percentage gain on the investment is 