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PLEASE I WILL GIVE YOU ALL MY BRIANLIST HELPPP

If the speed of an electromagnetic wave is 100,000 cm/s and its wavelength is 100 cm, what is its frequency? a) 100,000 cycles per second (hz) b) 1 × 10-3 cycles per second (hz) c) 10,000,000 cycles per second (hz) d) 1,000 cycles per second (hz)

Sally deposited money into a savings account paying 4% simple interest per year. the first year, she earned $75 in interest. how much interest will she earn during the following year?

Abookstore owner is having a sale the book bart wants was originally priced at $14.99 the book is now $10.04 by what percentage was the price reduced