Answer:
$13.38
Step-by-step explanation:
tax =7% x 12.50 = 7/100 x 12.5 = $0.875
Price to pay = $12.50 + $0.875 = $13.375 = $13.38
ryan has bike 180 minutes
D
using the double - angle identity
cos (2A) = cos² A - sin² A = 2cos² A - 1 = 1 - 2sin² A
the right side = 1 - 2sin² (112.5° ) with A = 22.5°
hence 2A = 2 × 22.5° = 45°
thus cos 45° = 1 - 2sin² ( 22.5°)
30
21*10=210
210/7=30
x=30