The period of a wave is 20 ms (milliseconds) and its wavelength is 4 cm. Calculate: a) The frequency of the wave

b) The velocity of the wave​

32: from largest to smallest, this hierarchy includes eons, eras, periods, epochs, and ages.

33: answer is c

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in order to follow the instructions and complete the statements, i need to use data from table c of your student guide. can you think of a way to let me see your student guide for a while ? i can't answer the question without the data in table c.