2 years ago

Find the perimeter. use 3.14 for pi

Mathematics

1 answer:

Mamont248 [21]2 years ago

4 0

Answer: 27.42 units

Step-by-step explanation:

6 + 6 + 6 = 18

C= 1/2 3.14d

1/2 x 3.14 x 6

3.14 x 3

=9.42

18+9.42 = 27.41

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Consider the series 4 + 12 + 36 ... Find the sum of the first 9 terms.

jeyben [28]

Answer:

39364

Step-by-step explanation:

You can simplify the equation to make 4(1+3+9...) The nth term is therefore $3^{n-1}$ so u can substitute that into the equation so 4( $3^{n-1}+ 3^{n} + 3^{n+1}$ ..). This would simplify to 4( $3^0 +3+3^2$ + $3^3+3^4+3^5+3^6+3^7+3^8$ ). By simplifying this, you can make it so 4( $2^2+6^2+18^2+42^2+81^2$ ) = 4(4+36+324+2916+6561) =39364