Respuesta :

liuvickyxin

a) 8.68 x 10^25

b) 1.439 x 10^12

jerryguo2282769

Answer:

(8.6810±0.0013)×10^26 kg

1.439 time 10^12

Step-by-step explanation:

standard for is the whole numer with thousandth's place times 10^n or the number of zeroes