The cosine of A is (adjacent side)/(hypotenuse) = 55/73. Do the division, then find the angle whose cosine is that number. The whole thing takes maybe 6 or 7 seconds with your calculator. It's choice-B.
B/A =1.6x10^-9/10^-6 :;b/a = 1.6x10^-3 @@B=0.0016A
Sarah had gotten $75 from every lawn she mowed. she mowed x lawns. after multiplying 75 by x, she realized she owed her mother $20.
