Question

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Answer 1

4
r = V3
area=Pi *( V3)² = Pi * 3 = 3Pi ***

l = V2
area = ( V2)² = 2 **
Razão > 3Pi/2  ( C )

5
a

4/6 = (5 + x)/18
4 * 18 = 6 * ( 5 + x)
72 = 30 + 6x
72-30 = 6x
42 = 6x
x = 42/6 = 7 ****

b

4/x =6/( 4 + t) = 8/3
6/( 4 + t) = 8/3
8( 4 + t) = 3*6
32 + 8t = 18
8t = 18 - 32
8t = -14
t = -14/8 = -7/4 = - 1,75***

4/x = 8/3
8x = 12
x = 12/8 = 3/2 = 1,5 **