kohat485

20.03.2020 • 

Mathematics

The volume that is inside the larger cylinder shown but outside the cylinder with the smaller radius, r, can be found with the formula below.

V= 1,024π−16πr2

V is the volume inside the larger cylinder but outside the smaller cylinder in cubic centimeters. r is the radius of the smaller cylinder in centimeters.

Which equation and solution give the radius of the smaller cylinder if the volume inside the larger cylinder but outside the smaller cylinder is 768π centimeters3?

Ответ:

girlwholikesanime

16.11.2020

Mathematics

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Step-by-step explanation:

A) Triangle PQR is transformed into triangle P'Q'R' by a scale of 1/2 because

1/2 (8,0) = (4,0) ; 1/2(6,2) =(3,1) ; 1/2(-2,-4) = (-1,-2)

B) When P'Q'R' reflected across the y axis, the y values don't change, the x values become the opposites, so (-4,0), (-3,1), (1,-2)

C) They are similar, but not congruent. The side length of P''Q''R'' is only half of the side length of PQR. A dilation produces congruent shapes

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