209 divided by 34 is 6.14
this is 6 14/100 simplified is 6 7/50
Answer:
30 men
Step-by-step explanation:
In order to be sure that the sample mean does differ from the population mean by more than 0.90, the sample size (n) that should be used is given by:

Where 'Z' , for a 95% probability is 1.960, 's' is the standard deviation of 2.5 inches:

Rounding up to the nearest whole number, the sample size should be at least 30 men.
1/3 is the slope.
x-3y=2
-3y=-x+2
y=(1/3)x+2/3