What was the temperature at sea level at 20,000 ft

What is the product of the radical expression. (7-2square root) (8+2 square root)

What is the volume of the cone to the nearest cubic millimeter? (use π  = 3.14) a) 46 mm3 b) 128 mm3 c) 183 mm3 d) 275 mm3 diameter = 5 mm height = 7 mm how do you do this problem step by step?

What is the 17th term in the arithmetic sequence in which a6 is 101 and a9 is 83