Answer:
A) 40%
Step-by-step explanation:
25% of yards have 6-8 trees; 10% of yards have 8-10 trees; 5% of yards have more than 10 trees. So, a total of 25% +10% +5% = 40% of yards have 6 trees or more. If a yard is randomly chosen, the probability it will have 6 or more trees is 40%.
Answer:
height = 2 feet
Step-by-step explanation:
V= L*w*h
L=length = 7
w= width = 4
h= height
V=volume = 56
V= L*w*h so we have:
h = V/(L*w)
h = 56/(7*4)
h = 56/28
h = 2 feet
height= 2 feet
He should use a sample size of 655.
We can use the formula
We find the z-value by first subtracting the confidence level from 1:
1 - 0.8 = 0.2
Divide this by 2:
0.2/2 = 0.1
Subtract this from 1:
1 - 0.1 = 0.9
Using a z-table (http://www.z-table.com) we find the z-score associated with this is 1.28.
Now we plug our information into our formula:
Answer:
a....12^2+16^2=20^2
Step-by-step explanation: