A count went from 605 to 203. What was the approximate percent decrease? Round the numbers to find an estimate of the percent decrease. The percent decrease was approximately 25%.
The percent decrease was approximately 33%.
The percent decrease was approximately 50%.
The percent decrease was approximately 66%

IT'S D = THE PERCENT DECREASE WAS APPROXIMATELY 66%

make sure you have version 2.50

try looking in the very back of the book : )

step-by-step explanation:

you can download it here

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)