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yarga [219]
3 years ago
12

Please help me with the circled ones !

Mathematics
1 answer:
TiliK225 [7]3 years ago
4 0

i can only help you with the volume of #5.

So the volume of a cylinder is = πr²h.

First , put the numbers in the equation.

π(6)² (14)

Next you solve.

π(6)²(14) = 36 (14) π = 504π


V= 504π

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<h3>Answer: Choice D.  4x^2 + 20x + 25</h3>

===============================================

Explanation:

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Choice D fits the description because 4x^2 = (2x)^2 is the first term, so a = 2x and 25 = 5^2 is the last term meaning b = 5. Note how 2ab = 2*2x*5 = 20x is the middle term.

-------------

(a+b)^2 = a^2+2ab+b^2

(2x+5)^2 = (2x)^2+2*2x*5+5^2

(2x+5)^2 = 4x^2 + 20x + 25

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