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Mathematics
3rd Grade

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6 questions
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1.
FILL IN THE BLANK QUESTION
1 min • 1 pt
Calcule a equação abaixo e descubra o valor de x.
2x+1 + 2x + 5 = 389
2.
OPEN ENDED QUESTION
3 mins • 1 pt
Resolva as seguintes equações:
A) 2x = 32 B) (0,5)x = 41-3x
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3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Resolva está equação exponencial em duas partes: marcando a resposta direto e depois resolvendo.
1x + 5x + 25x = 31
0
1
2
3
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A quantidade de bactérias de uma cultura, depois de t horas, é dada pela expressão Q(t)=Q0⋅2t , em que Q0 é a quantidade inicial de bactérias. Nessas condições, se inicialmente havia 1500 bactérias, após quantas horas haverá 12.000 bactérias?
1 hora
2 horas
3 horas
4 horas
5.
OPEN ENDED QUESTION
3 mins • 1 pt
Uma cidade possui crescimento populacional exponencial conforme descrito na fórmula P(t) = 20 000 . 2t/8 em que t é o tempo, em ano, e representa a quantidade de habitantes dessa cidade.
Sendo assim, após 24 anos a população dessa cidade será de:
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6.
OPEN ENDED QUESTION
3 mins • 1 pt
Dada a função f(x) = 2x+3 + 10, o valor de x para que f(x) = 74 é quanto?
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