What is the sum of the sequence?
−32+(−34)+(−36)+...+(−778)+(−780)=< br /> Is it -152250 I need a good explanation!!!

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

your answer is #3 , 8 - 3 square root of 11