It depend on the angle like straight obtuse or right, complementary and supplementary
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Answer:
6.5 hours or 6 and a half hours.
If the last number is equal to 5 the add 1 to the number beside it. and if it is not up to 5 then leave it there.so the answer for this is 38.9
I’m pretty sure the answer would be c.
Ps. Sorry if I’m wrong. :)