Answer: (5 x 10^8) - (8 x 10^7) = 420,000,000 or 4.2 x 10^8
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Answer:
4.2 x 10^7
Step-by-step explanation:
First you solve.
5 times 10^8 = 500000000
8 times 10^7 = 80000000
Then subtract
500000000 - 80000000 = 420000000
The scientific notation would be 4.2 x 10^7 because "4" is 7 digits away from 0
