Question

Round off each of the following numbers to two significant figures:
(a) 517

Answer 1

520.

Step-by-step explanation:

two significant figures meaning 2 numbers that aren't 0.

we need to keep 51, and change the value of 7 to zero.

as 7 is above 5, we carry 1 over to 1 in the tenths place, hence giving the answer 520