Answer:
380.13
Step-by-step explanation:
area= (pi)x(r^2)
pi times r squared
100 would be correct because the 9 in the hundredths place rounds to a ten, and so does every other number.
A proper fraction is a fraction less than one, with the numerator less than the denominator so 1/2 is your answer
Answer:
16.5 year
Step-by-step explanation:
Using, mean = sum/no. *of observations
Here,
=> 16.2 = (sum of ages of boys)/18
=> 16.2 x 18 = sum of ages of boys
=> 291.6 = sum of ages of boys
Similarly, sum of ages of girls = 27 x 16.7 = 450.9
Mean(total) = (sumof agesof boys + girls)/45
Mean = (291.6 + 450.9)/45 = 16.5
