Answer the question attached i am so stuck you loads

a) multiply the leading numbers and add the exponents, then convert into scientific notation.

(7 x 3) x 10⁵⁺²

= 21 x 10⁷

= 2.1 x 10⁸

D

b) divide the leading numbers and subtract the exponents, then convert into scientific notation.

(2 ÷ 4) x 10⁵⁻²

= 0.5 x 10³

= 5.0 x 10²

B

part 1 answer = 8

part 2 answer = 72

step-by-step explanation:

part 1 explanation = add all of the numbers, then divide by how many numbers you have. so, 200/25 = 8.

part 2 explanation = not gonna lie, this is hard to explain, so just google how to do it.

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