Calculate the following and round to the allowed number of significant figures

Question

1. (18.00 x 1.5) / 0.00625
2.4.61 X 10^3 / 5.1008 x 10^-4

My answers
1. 4320
2. 9.037 x 10^-1
Please explain what I did wrong if I'm incorrect.
Thank you

Answer 1

For #1 your digits are right but not the s.f. You are allowed only 2 places (because of the 1.5) so your answer should be 4.3E3

For #2, I think you keyed in 4.61E-3 instead of 4.61E3.
The answer is 9.0377E6 and you are allowed 3 places so that should be rounded to 9.04E6.