Question

what is 55.78 / 32.1 = 1.7376947 rounded to the correct number of significant figures

Answer 1

when it comes to rounding tosigfigs, the short rule is: you can only use the same number of digits as your FEWEST measurement. The numerator has 4 SF's, the denominator has 3. The final answer is allowed to have 3 sigfigs.

Answer 2

1.73

Answer 3

it's 1.74. Look at the 4th digit. it's larger than 5, so rounds up to 1.74