Answer:
44cm²
Step-by-step explanation:
Rectangle = 20cm² (10×2)
Triangle = 24cm² (8×6)/2
Answer:
40.9 %
Step-by-step explanation:
8.8 is .4 hours above the mean this is .4/1.77 = .226 standard deviations above the mean
Using z-score table this corresponds to ~ .5910 (59.10%)
this percentage is LESS than 8.8 hours
the percentage ABOVE this is 40.9%
(Not asked, but this is 40.9 (40 ) = ~ 16 of the 40 mechanics sampled)
It is simple you only have to divided 12 to 2 = 6