Avalição 9A
Quiz
•
Mathematics
•
9th Grade
•
Practice Problem
•
Hard
AMELIA MORO
Used 6+ times
FREE Resource
Enhance your content in a minute
15 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
2 mins • 2 pts
O professor de Matemática do 9° ano da escola Aprendizagem em Foco propôs a seguinte atividade:
A resposta correta dessa atividade é:
4,2
42 x 10
42 x 102
42 x 104.
2.
MULTIPLE CHOICE QUESTION
2 mins • 2 pts
O átomo é a menor porção de um elemento químico. O átomo de Hélio, por exemplo, possui diâmetro igual a 0,000000000006 m. Por ser um valor muito pequeno normalmente é representado em notação científica.
6 x 10-12
6 x 10-11
0,6 x 10-12
0,6 x 1012
3.
MULTIPLE CHOICE QUESTION
2 mins • 2 pts
Para transformar números excessivamente grandes em notação científica, contamos quantas casas vamos deslocar a vírgula e escrevemos o número em forma de potência de dez. A quantidade de números contados define o expoente. Assim, escrevendo a maior distância da Terra ao Sol 152.100.000 em notação científica temos:
1,521 x 108
15,21 x 108
152,1 x 108
1521 x 108
4.
MULTIPLE CHOICE QUESTION
2 mins • 2 pts
Resolving the power 10-5 we find:
0,0001.
0,00001.
0,000001.
100.000.
5.
MULTIPLE CHOICE QUESTION
2 mins • 2 pts
O resultado da operação (2 x 103) x (3,2 x 102) é:
1,2 x 105
5,2 x 105
6,4 x 105
6,4 x 106
6.
MULTIPLE CHOICE QUESTION
2 mins • 2 pts
A duração das aulas em uma escola é de 50 min. Considerando que em um semestre letivo o estudante teve 56 aulas de Matemática, quantos minutos de aula ele teve?
0,28 x 103.
2,8 x 103.
2,8 x 102.
2,8 x 104.
7.
MULTIPLE CHOICE QUESTION
2 mins • 2 pts
A velocidade da luz no vácuo é de aproximadamente 300.000.000 m/s. Convertendo este valor para notação científica obtém-se:
30,0 x 108
3,0 x 109
3,0 x 108
3,0 x 107
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