Question

Find circumference of circle if area is 7586

Answer 1

πr²=7586
r² = 7586×7/22 = 53102/22 = 2413.727
r = √2413.727 = 49.129
circumference=2πr = 2×3.142×49.129= 98.258×3.142= 308.726

Answer 2

Step-by-step explanation:

Adding 8 to 7 results in a sum of digits of 6, and so on down to adding 8 to 1 which gives 9.

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Number Repeating Cycle of Sum of Digits of Multiples

10 {1,2,3,4,5,6,7,8,9}

11 {2,4,6,8,1,3,5,7,9}

12 {3,6,9,3,6,9,3,6,9}

13 {4,8,3,7,2,6,1,5,9}