Answer:
Population of monkeys after 2 years = 3200
Step-by-step explanation:
Total number of monkeys at the start = 2975
Increase ratio of monkey population one year = 
∴ New population of monkeys after 1 year= 
Decrease ratio the next year = 
∴ Population of monkeys after 2 years= 
Test statistic = (mean 1 - mean 2) / sqrt( dev1/n1 + dev2/n2)
Mean 1 = $16.75
mean2 = $16.25
dev1 = $1.00
dev2 = $0.90
n1 = 80
n2 = 60
Test stat = (16.75 - 16.25) / sqrt(1/80 + 0.95/60)
Test stat = 3.01
The answer is B. 3.01
Answer:
50 teachers
Step-by-step explanation:
step 1
Find the number of teachers for a ratio of 1:12
1/12=x/2,400
x=2,400/12=200 teachers
step 2
Find the number of teachers for a ratio of 5:48
5/48=x/2,400
x=2,400*5/48=250 teachers
step 3
Find the difference
250-200=50 teachers
Answer:
217 is the perfect swuare i think