In the magical world of Mathland, the amount of time you spend studying for a lab assignment relates to the percentage score you get. If you study for 90 minutes, you get a score of 63%. How long do you need to study to get a score of 91%? Question 3 (5 marks) You buy a new calculator at the Mathland store. The price before tax was $14. When the cashier checks you out, the price with tax comes to $17.08. How much is the tax rate (as a percentage) in Mathland?