Which statements are true regarding the expression below? Check all that apply.
81.8-3.8
The last factor, 8, with no exponent shown is equivalent to gº
The sum of the exponents is -3.
The value of the expression is -512.
The value of the expression is 512
An equivalent expression is 87.8-10.
O An equivalent expression is 8-2.8-2.

gaddgad

step-by-step explanation:

answer: b.

step-by-step explanation:

the y coordinate for point b is 0, and answer b is the only one with that y coordinate.

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

d. you cannot tell because there are no values shown.