Charles picked out a new hat for $21 and sales tax is 7.5% what is the total bill he will pay for the new hat

Ineed asap. i cant understand this question i need someone to me right away

Find the area of the regular hexagon if a side is 20 cm.

Mr. vector door is buying two new cowboy hats all together the hats cost $75.12 the second heart cost twice as much as the first hat what is the price of the more expensive at round to the nearest hundredth