Answer:
numerator; 5.01×(10^5)= 5.01×100000
denomenator ; 7.8×(10^2)= 7.8×100
therefore : 501000/780
= 642.3077 answer
1:9
1 unread email for every 9 read
-1 2/5
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Answer: 4 to the 9th power. This is the answer to the picture. I used the app "Photomath"
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