Answer:
6.23*10^6
Step-by-step explanation:
We first write the answer in full notation 6,230,000.
Then we count how many decimal places it takes before we have one leading digit. Since it is six, we move the decimal place and write 6.23*10^6
Answer: 1 13/30
Step-by-step explanation: Turn into a mixed number
15/100
45/x
cross multiply to get 15x = 4500
x = 300 minutes. 300 + 45 = 345 minutes in total.