Answer:
Area of the fig. = 127 yards^2
Step-by-step explanation:
So,Seeing carefully we see 3 figures : 2 rectangles & 1 square,
So, first of all Area of the Big Rectangle
Area of the rectangle = l*b
length = 13 & breadth = 9
= 13*9
= 117 yards^2
Now, Area of the small rectangle
Length & Breadth = 3 & 2
Area = 3*2
= 6 yards^2
Area of one and only square in the fig.
= S*S (side = 2)
= 2*2
= 4 yards^2
Total area of whole fig. = (117 + 6 + 4) yards^2
= 127 yards^2
Hope it works!
Answer:

Step-by-step explanation:
If we assume that the number of arrivals is normally distributed and we don't know the population standard deviation, we can calculated a 95% confidence interval to estimate the mean value as:

where x' is the population mean value, x is the sample mean value, s is the sample standard deviation, n is the size of the sample,
is equal to 0.05 (it is calculated as: 1 - 0.95) and
is the t value with n-1 degrees of freedom that let a probability of
on the right tail.
So, replacing the mean of the sample by 49, the standard deviation of the sample by 17.38, n by 10 and
by 2.2621 we get:

Finally, the interval values that she get is:
