The number of significant figures in the numbers $4.8000 \times 10^{4}$ and $48000.50$ are respectively

The number of significant figures in $4.8000 \times 10^{4}$ is 5 (zeros on right after decimal are counted while zeros in powers of 10 are not counted). The number of significant figures in $48000.50$ is 7 (all the zeros between two non-zero digits are significant).