Answer:
$30
Explanation:
Given that they charge $1 per minute to watch the show and in addition, there is also a processing fee that you must pay if $10, to attend the show for 20 minutes, it means that the total fee to be paid will be the sum of the product of 20 and $1 and the processing fee of $10
= (20 * $1) + $10
= $20 + $10
= $30