Answer:
The standard error of the mean is 10.11 points
Step-by-step explanation:
Standard error of mean = t×sd/√n
sd = 115 points, n = 500, degree of freedom = n-1 = 500-1 = 499, assuming a 95% confidence level, t-value corresponding to 499 degrees of freedom and 95% confidence level is 1.96501
Standard error of mean = 1.96501×115/√500 = 10.11 points (to the nearest 100th)
Answer:
591.5 
Step-by-step explanation:
Volume = length x width x height
Length = 13 ft. Because it is the same size has the height
Width = 7 ft.
Height = 13 ft.
13ft x 13ft x 7ft = 1,183 ft
BUT, that can't be the answer because we're solving a prism
So divide the volume.
1,183 divided by 2 equals 591.5
4/10 is equal to 2/5 because if you reduce 4/10 you get 2/5 which shows that they are equal.