There are 60 minutes in an hour, so 1 hour is equal to 60 minutes.
Hope that helped =)
She will need 12 seconds because -20•12=-240
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Answer:
38.7°
Step-by-step explanation:
You are basically looking at a triangle with a 90° angle (check picture).
Since we are looking for the ramp's angle and are given the length of the opposite and the hypothenuse, we have to solve the following equation:

which is equivalent to

N6+5=n-10
n6=n-15
n5=-15
n=-3
hope this helps:)