Answer:
if it's 30 minutes then it should be 58 1/2
Explanation:
58 1/2 should be the real answer because it's rating the descent if it's for 30 minutes, if it's 38 then I don't know, but I hope that helps a bit.
56.5?
I just subtracted 5,275 to 3,128 and got 2,147 and then divided that to 38 minutes and got 56.5.
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