This would be C. 60$
This is because if she got the bag for 50% off, 30 divided by 2 is 15$, 45 divided by 2 is 22.5, 60 divided by 2 is 30$ so option C. Would be your answer.
Zero Property of Multiplication hope this helps
First count the number of digits after the first one 6 This = 6 and is the exponent of 10 so the required notation is
6.000370 * 10^6