O nível de óleo num reservatório varia com o tempo t, contado em horas, a partir das 7h 30 min., conforme a expressão N = - 0,2t² + 2,4t - 2. O instante em que o reservatório está mais cheio é precisamente: 12h 45min 13h 15min 12h 30min 13h 05min 13h 30min

the answer is b.

64

step-by-step explanation:

c=2πr=2·π·8≈64

where does the z at is it on the x axes or on the y axes any way if it is on the y axes put it horizontally and if it is on the x axes put it vertically

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