Madison sold the lot for $2,500 this is because 25% of $2,000 is $500
the way you would solve this is move the decimal point of 25% two places so it would look like .25 then, you would multiply these two numbers together getting an answer of $500 Then you would add the $500 to the $2,000 dollars and get the answer of $2,500
The answer to your question is b 3 to the 6power. The reason why is there are 6 3 so instead writing 3*3*3*3*3*3 you can just do 3 to the 6 power.
Hope this helps:)