friendjen
28.04.2021 •
Mathematics
04.Um rojão acoplado a fogos de artifício é lançado de um penhasco, 25 metros acima de um lago. O rojão cairá no lago após explodir ao atingir sua altura máxima. A altura h do rojão, em metros, em relação à superfície do lago é dada por h(t) = –5t2 + 20t + 25, em que t é o tempo, em segundos, a partir do instante de lançamento. Considerando essas informações, pode-se afirmar que o rojão atingirá o lago a) 5 segundos após o lançamento. B) 2 segundos após o lançamento. C) 1 segundos após o lançamento. D) 1 segundos antes do lançamento. E) 4 segundos após o lançamento.
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Ответ:
Sample Juan will break even because 16 and –16 are a zero pair. –16 is the additive inverse o f 16 and the sum will be zero.
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