Math question help please 8th grade?
A farmer grows trees on a small orchard. The mean height of a tree is 11.8feet and the standard deviation rounded to the nearest hundredth is 1.37 feet. How many trees on the orchard have a Z-score less than Zero?
9.8ft, 9.8ft, 10.4ft, 11.1ft, 11.7ft, 12.0ft, 12.3ft, 12.4ft, 13.5ft, 14.0ft
A. 3
B. 4
C. 5
D. 6
(show work!!!) please