This may be calculated from its diameter using the formula:
<= ad or
Or, substituting the radius for the diameter:
C= 2tr
Wherer is the radius and d is the diameter of the circle, and it (the Greek letter pi) is the constant 3.141
592

Hint:ci

Astudent showed the steps below while solving the inequality |x-4|< 1 by graphing.

Margie is practicing for an upcoming tennis tournament. her first serve is good 20 out of 30 times on average. margie wants to know the estimated probability that her first serve will be good at least four of the next six times she serves. how could she design a simulation for this scenario?

Will mark brainliest! ( explain the answer too, it can be one sentence)