Well, it's 40/4 for one minute, or 10 for one minute. You want 36 mins, so you multiply by the square root (6), to get $60, to which you also add the $90 for the lesson (result is $150)
The answer is X= Rx Teta, X is the arc length
so the answer is <span>16 pi over 3cm
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The answer is C or D but I think its most definitely C
X = 29
61 + 90 = 151
180-151 = 29