<u>Answer</u>:
A. 
<u>Step-by-step explanation:</u>
The formula for arc length is:
arc length = rθ
where:
r is the radius = 7 in
θ is the central angle in radians = 135 × 
= 3/4 π
Substituting these values into the formula:
arc length = 7 in × 3/4 π
=
Answer:
Step-by-step explanation:
Cancel 4c on both the sides of the equation.
Bring the 2 in the denominator of 11/2 to the left hand side of the equation.
Bring 4 to the right hand side if the equation.
The following option best describes how the margin of error is calculated: D. It is equal to the inverse of the square root of the sample size.
The small amount that is granted for in case of miscalculation or change of circumstances.
