let $r$, $s$, and $t$ be the roots of the equation $x^3 - 2x 1 = 0$ in some order. what is the maximal value of $r^3 - s- t$?

a. -0.3 > -0.33

56.6

step-by-step explanation:

the ratio of the perimeters is equal to the scale.

the ratio of the areas is equal to the square of the scale.

34 / 20 = k

a / 19.6 = k²

substituting:

a / 19.6 = (34 / 20)²

a = 19.6 (34 / 20)²

a ≈ 56.6

mean, 40.6

step-by-step explanation:

the answer is b