Answer: A
Step-by-step explanation:
X=(2±√4-12)/2
X=(2±2i√2)/2
x1=1+i√2
x2=1-i√2
Answer:
Step-by-step explanation:
Given that in order to efficiently bid on a contract, a contractor wants to be 95% confident that his error is less than two hours in estimating the average time it takes to install tile flooring.
Std deviation =4.5 errors
95% confidence interval = Mean±1.96*std dev
Hence we have

Sample size should be 20.
Answer:
10 m
Perimeter = 24 m
Step-by-step explanation:
( Hypotenuse )² = 6² + 8²
= 36 + 64
= 100
= 10 x 10
( Hypotenuse )² = 10²
Hypotenuse = 10 m
Perimeter is the sum of all sides in a triangle.
Perimeter = 6 + 8 + 10 = 24 m
Answer:
106.81 mm
Step-by-step explanation:
C=2πr=2·π·17≈106.81415