Answer:
Step-by-step explanation:
In the past, mean of age of employees
i.e. 
Recently sample was taken
n = sample size = 60
Mean of sample = 45
Std dev of sample s = 16

(Right tailed test)
Since only population std deviation is known we can use t test only
Std error = 
Mean difference = 45-40 =5
Test statistic t=
df = 60
p value =0.008739
Since p < 0.05 we reject null hypothesis
The mean age has increased.
Reflex angle
Step-by-step explanation:
Reflex angle is more then 180 and less then 360
Hello there,
How much change will get out of $30
Answer:
Pennies: 3000
Nickels: 600
Quarters: 120
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