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Chemistry, 22.03.2021 03:50 dbag1162

An electromagnetic wave has a frequency of 45,000,000 Hz. What is this frequency in scientific notation?
O A. 4,5*10^8 HZ
B. 4.5 * 10^8 HZ
O c. 4.5*10^7 HZ
D. 4.5*10^8 HZ​

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