Answer:
Margin of error is 4.1
Step-by-step explanation:
The margin of error in statistics refers to a quantity which expresses the amount of random sampling error from the results of a survey conducted. A large margin of error implies less confidence in the results of the survey.
The margin of error can be approximated using the population standard deviation, if known.
Therefore, the margin of error will be reported as 4.1
Answer:
- 20 + 8i
Step-by-step explanation:
Noting that i² = - 1
Given
[(6i + 9) + (4i - 5)] × 2i ← evaluate the terms inside the square bracket
= ( 6i + 9 + 4i - 5 ) × 2i
= (10i + 4) × 2i ← multiply each term in the parenthesis by 2i
= 20i² + 8i
= 20(- 1) + 8i
= - 20 + 8i
The square root of 12 is 3.4.
Your integers are 3 and 4.
I hope this helps!
Answer:
49π
Step-by-step explanation:
πr^2
π*7^2
49π
