What is the value of 4a3 – 2b2 + 5 when a = 3 and b = −2

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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

The legs of a right triangle measure 6 meters and 8 meters. what is the length of the hypotonuse.