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irina [24]
3 years ago
13

What is the approximate circumference of a semicircle with a radius of 12 centimeters?

Mathematics
2 answers:
Olenka [21]3 years ago
5 0
Circumference of circle is 2*pi*radius
so 2*3.1416*12 = 75.4 cm
circumference of semicircle would be (1/2) (75.4) = 37.7 cm
answer is 37.7 cm
lisabon 2012 [21]3 years ago
4 0
You do Pi×Radius^2
so 24×Pi=75.4
then 75.4÷2=37.7
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<h3>Explicit form of a geometric sequence</h3>

The explicit form of a geometric sequence is expressed according to the equation;

Tn = ar^n-1

where

r is the common ratio

a is the first term

n is the number of terms

Given the sequence below;

6x,18x^4,54x^7

r = 18x^4/6x

r = 3x^3

a = 6x

n = 8

Substitute to have:

T8 = 6x(3x^3)^8-1

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T8 = 13122x^22

Hence the 8th term of the geometric sequence is 13122x^22

Learn more on geometric sequence here: brainly.com/question/24643676

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