Factor completely x8 − 81.

(x4 − 9)(x4 + 9)
(x2 − 3)(x2 + 3)(x4 − 9)
(x2 − 3)(x2 + 3)(x4 + 9)
(x2 − 3)(x2 − 3)(x4 − 9)

Aplane flies around trip to philadelphia it flies to philadelphia at 220 miles per hour and back home with a tailwind at 280 miles per hour if the total trip takes 6.5 hours how many miles does the plane fly round trip

() at a farm, animals are fed bales of hay and buckets of gain. each bale of hay is in the shape of a rectangular prism. the base side lengths 2 feet and 3 feet, and the height is 5 feet. each bucket of grain is a cylinder with diameter of 3 feet. the height of the bucket is 5 feet as the height of bale. a. which is larger in area, the rectangular base of the bale or the circular base of the bucket? explain how you know b. which is larger in volume, the bale or the bucket? explain how you know

Given abcd ac=38 and ae=3x+4 find the value of x