Question: A Cepheid variable star is a star whose brightness alternately increases and decreases. For a certain sta brightness of the star at time t, where

A Cepheid variable star is a star whose brightness alternately increases and decreases. For a certain sta brightness of the star at time t, where t is measured in days, has been modeled by the functionB(t)=4.00.55sin(2t5.1)(a) Find the rate of change of the brightness at time t days.dBdt=(b) Find the rate of change of brightness at time t=1 day.dBdt= Enter a number. xResources

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