Whats the answer (4.5 × 10^4) ÷ (300) = 1.) 1500
2.) 1.5 × 10-2
3.) 150
4.) 1.5 × 10^6​

Barbara's piano instructors house is 7 1/8 miles from her house. after biking for 1 3/4 miles she stops to rest how much longer does she need to bike to reach her instructor's house

Me because some of question i don’t understand

I’m still confused on how to work the percentages