What is the measurement 345.067 mg rounded to four significant digits?
a. 345.0 mg
b. 345.1 mg
c. 345.06 mg
d. 345.07 mg

significant digits start at the first nonzero number, so 345.067 to four digits is 345.1

The answer is A.

for any of you who need the translation here it is

step-by-step explanation:

find the angular size of the equatorial radius of the earth, if the horizontal parallax of the sun

answer: all of the odd numbers were opened

the first person was the one that was opening all of the lockers. since one is odd, this causes all of the odd number lockers to be opened in the end.