Final answer:
After a 20% discount, the price of the tablet drops to $392. A subsequent 20% markup increases the price to $470.40, rounded to the nearest cent.
Step-by-step explanation:
The original price of the tablet computer is $490. To find the sale price after a 20% discount, we calculate 20% of $490:
Subtract the discount from the original price to get the sale price:
The tablet computer is then marked up by 20% after the sale. To find the new price after the markup, we calculate 20% of the sale price:
Add the markup to the sale price:
Therefore, the price of the tablet computer after the markup is $470.40, rounded to the nearest cent.