4. find circumference of the following circle with radius 7cm.{ take =
)
7cm

43.96 cm²

Step-by-step explanation:

the circumfrece of a circle is either given by C= 2 x π x r or C = πd

r = radius

d= diameter(radius x2)

so that will be C = 2 x 3.14 x 7 or  3.14 x 7 = 43.96 cm²

π can be either 3.14 or 22/7

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a_n = a_1 + (n - 1)d

the first term is 6.

the common difference d = ?

when you find d, replace n with 7 and d with the common difference to find your answer.

27 +27 or 27times 2=54

the diffrence is 0