Question

How many zeroes are in the simplified expression 4 times 10x

Answer 1

let's try some numbers
4*10ˣ

`4*10^1`=40, 1 zero

`4*10^2`=400, 2 zeroes

`4*10^3`=4000, 3 zeroes

hmm

`4*10^x`=x zeroes

answer is A, x zeroes

Answer 2

There only one zero in the simplified expression four times 10x