Question

a²=x(10)^6 ÷ y/3

b²=x÷y

given b = 8x10^5 find a

Answer 1

anybody?

Answer 2

dividing by y/3 is the same as multiplying by 3/y
so you can write this as
\[ a^2 = x \cdot 10^6 \cdot \frac{3}{y} \]
we can re order the terms to look like this
\[ a^2 = \frac{x}{y}\cdot 3 \cdot 10^6 \]

notice you have x/y which you can replace with b^2 (the second equation tells you b^2 is the same as x/y)

can you finish ?