Question

How many numbers has 2^15x5^12

Answer 1

Hi.

I think you want the result of the expression. First, we solve the exponentiations.

$\mathsf{2^{15}\cdot5^{12}=}\\\\\mathsf{32'768\cdot244'140'625}$

Now we multiply. 
$\mathsf{ 32'768\cdot244'140'625=}\\\\\boxed{\mathsf{8'000'000'000'000}}$


We could turn that number into an exponentiation.

$\mathsf{8'000'000'000'000=\boxed{\mathsf{8x10^{12}}}}$

Qualquer dúvida, deixe nos comentários.
Bons estudos.