Answer :
*Hint* the ^ just means that the following numbers are powers like 1.9x10^3 is same as 1.9x10³
To figure this out just multiply
26000000000 × 1.9x10³ = 4.94x10¹³ cells in adults
To figure this out just multiply
26000000000 × 1.9x10³ = 4.94x10¹³ cells in adults