Mathematics, 26.09.2019 01:30 spaigenicole

Your neighbor leaves his yard, which is 120 ft from the bus stop. he begins to walk toward you at the bus stop and then passes you. he walks at
a speed of 4 ft/s. his distance d from you after t seconds is given by d =|120-4t|. after how many seconds is your neighbor 30 ft from you?
a -22.5 s and -37.5 s
b. 22.5 s and 37.5 s
c. 30
d. 15 s and 45 s

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