To solve the problem, we can set up an equation using the given information.
We are told that 8×10^3 is 40 times larger than a×10^2.
Mathematically, we can write this as:
8×10^3 = 40(a×10^2)
Simplifying this equation, we can divide both sides by 40:
(8×10^3) ÷ 40 = a×10^2
Simplifying further, we can divide both sides by 10^2:
(8×10^3) ÷ 40 ÷ (10^2) = a
Note that (10^2) is equivalent to 100.
Simplifying the left side, we have:
(8×10^3) ÷ 40 ÷ 100 = a
Finally, simplifying the expression on the left side, we have:
20000 ÷ 4000 = a
Dividing these values gives us:
5 = a
Therefore, the value of a that will make 8×10^3 40 times larger than a×10^2 is 5.