PLS HELP ME ASAP ill give thanks, and five stars

What is the value of the expression below? (81^2)^1/8

During your cycling trip, you and your friends often stayed in hostels. the prices of these are listed below. hostel standard room (price per night) with breakfast (price per night) super sleep hostels £22.45 £28.65 normandy nights £18.55 £25 zzzola hostels £24.50 £30.99 belgian beds £11.20 £18.55 night-time rest days ? £33 what is the range in cost for a single night, including both standard room prices and with breakfast prices?

What is the volume of a cone with a height of 6 cm in the radius of 2 cm