981,657 rounded to nearest ten thousand

980,000

Step-by-step explanation:

Since when we round a number to the nearest thousand then we check the thousand place digit,

If the digit is less than 5 then the number is rounded to previous ten thousand while if the digit is 5 or more than 5 then the number is rounded to next ten thousand,

Here, the given number,

981,657,

Digit at thousand place = 1 ( < 5 )

Thus, 981,657 ≈ 980,000 ( nearest ten thousand )

0.02

step-by-step explanation:

time of 9 192 631 770 periods of the radiation corresponding to the transition between the 2 hyperfine levels of the ground state of the caesium 133 atom at 0 k (but other seconds are sometimes used in astronomy)