The muzzle velocity of an ancient cannon was about 420ft/s. What is the cannonball's speed in miles per hour?
1 answer:
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Answer:
8
Step-by-step explanation:
Nth term of a geometric sequence is given as:
...(1)
Plugging n = 9, a = 3 and r = 2 in the above equation, we find:
... (2)
Comparing equations (1) & (2), we obtan:
(n - 1) = 8