It is: 5.0*10^8 in scientific notation
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500 written in scientific notation is 5.0 × 102
Note that 500 is interpreted as 500.0. Move 2 decimal places to the left and write out: 5.0 x 102.
It is: 3.245*108 which means that the decimal point must be moved 8 places to the right to get back to 324,500,000
Scientific notation helps scientists because if they use numbers with 50, 100, or even 500 digits, they don't have to write all the digits, which could take 5 minutes. Instead, they just write scientific notation, which saves a lot of time and space that could be needed later.
Note that 500 is same as 500.0. Shift 2 decimal places left from the starting point and write out: 5.0 x 10²