Zachary adds 26.45 g to 2.55 g. how many significant figures should his answer have? two three four five

It should have four significant figures

the answer is otpion c) understanding

he wants to be heard one more time. he wants to be understood. he needs the truth one more time.

try using substitution:

x + y - 6 = x - y. (i'm not giving you the exact answer). since 0 = x - y, then sub 0 in the equation with x - y. combine your like terms, and then use inverse operations, and you'll have your answer.

: -)