Question: A variable star is one whose brightness alternately increases and decreases. For ine sucjh star, the time between periods of maximum brightness ulis 5.4 days,

A variable star is one whose brightness alternately increases and decreases. For ine sucjh star, the time between periods of maximum brightness ulis 5.4 days, the average brightness (or nagnitude) of the star us 4.9, and its brightness varies by _0.25 magnitude. Find a function that models the brightness of the star ad a function of tine (in days), t.(Assume that at t=0 the brightness of the star is 4.9 and that it is increasing.)

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