Question

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

Answer 1

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

Answer 2

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