its A
Step-by-step explanation:
Cos Ф - cos Ф.sin² Ф
sin² Ф = 1 - cos² Ф
cos Ф - cos Ф( 1-cos² Ф) = cos Ф - cos Ф - cos³ Ф = cos³ Ф
cos Ф - cos Ф.sin² Ф = cos³ Ф
100-28-48-8= 16%
Hope it helped
And 49 mile costs $39.20
So 1 mile costs $0.80
$0.8 x 34 = $27.20