In a book about birds, there is a drawing of a sea eagle that shows a wingspan of 2.8 cm. If the book says the scale is 1:90, what is the actual wingspan of the sea eagle.
Answer:
2.52
Answer:
14.4
Step-by-step explanation:
Answer:
-0.462
Step-by-step explanation:
The null hypothesis is:
The alternate hypotesis is:
Our test statistic is:
In which X is the sample mean, is the population mean(the null hypothesis), is s is the standard deviation of the sample.
In this problem:
So
So the correct answer is:
-0.462
The pool itself has a radius of 15 ft
Add on the 5 ft buffer zone and we have a 15+5 = 20 ft radius
Circumference
C = 2*pi*r
C = 2*pi*20
C = (2*20)*pi
C = 40pi
C = 40*3.14
C = 125.6
Rounding up to the nearest foot, you need 126 feet of fencing