Final answer:
To find the total cost of the tracks on album id 10, we would calculate the sum of all track costs, add the sales tax, and then round the result to the nearest cent using a SQL SELECT statement.
Step-by-step explanation:
The question asks us to use a SELECT statement to query the track table and find the total cost of the tracks on album id 10, rounded to the nearest cent. To achieve this, we need to sum the cost of all tracks on album id 10 and apply the applicable sales tax. This requires understanding SQL operations and basic arithmetic operations like addition and rounding.
To start, we would add up the cost of all tracks on the album. Let's say this gives us a subtotal. Next, we would convert the sales tax rate from a percentage to a decimal by dividing it by 100, and then multiply it by the subtotal to find the amount of sales tax. After that, we add the sales tax to the subtotal to get the total cost. Finally, we would round this number to the nearest cent as required.
For example, let's say the total cost before tax is $20.98 and the sales tax rate is 7%, we would calculate the sales tax as $20.98 * 0.07 = $1.4686, and then add this to $20.98. To round to the nearest cent, we would follow standard rounding rules—since the digit after the hundredths place is 8, we round the total cost to $22.45.