A Prefeitura da Cidade Feliz doou um
terreno para a Comunidade Viver Bem
discutir projetos que deveriam ser
implantados no local. Após um planejamento
participativo, ficou acertado que 45% da área
total desse terreno serão destinados a uma
creche;
3%,
para banheiros públicos e 12%
para uma academia de ginástica comunitária.
A sobra da área, que é de 960m² será
utilizada para uma pequena praça com
parque de lazer. Qual é a área total ocupada
pela creche, banheiros públicos e academia
de ginástica comunitária?
answer: no
step-by-step explanation: because the big angle will spread away the 2 side that it is on and make the opposite side even longer.
the largest number of the four options is 1.8 x 10-2
you have it in scientific notation.
1.80 x 10-6 = 0.00000180
1.80 x 10-4 = 0.000180 (bigger, or "less small", than the former one)
so
1.8 x 10-2 = 0.0180. as you see. the "less small", or the biggest one of them all.
as you have negative exponent, it means you are dividing 1.8 by 100 (i.e. moving the dot towards left, two times).
if you had positive exponent for the scientific notation, power of tenths, you would be multiplying times 100 (moving the dot towards right) as below:
1.8 x (10)2 = 180
so. if you have negative exponent in scientific notation, move the dot toward left. if it is positive, toward right as many times the exponent tells you.
false
step-by-step explanation:
Aqui temos a seguinte divisao de terreno:
creche + banheiros + academia = 45% + 3% + 12% = 60%
O que sobra: Fazendo a conta, 100 - 60 = 40, restará 40%
No enunciado informa que sobraram 960m².
Logo concluimos que 40% = 960m²
Sendo assim, regra de 3:
m² %
960 40
X 60
40X = 960 . 60
X = 57600/40
X = 1440
Logo 1440m² é destinado para: creche, banheiros públicos e academia
de ginástica comunitária.
O terreno tem um total de 1440 + 960 = 2400m²
para cada espaço - novamente diversas regra de 3:
→ creche = 45%
m² %
2400 100
X 45
X = 108000/100 = 1080
→ banheiros públicos = 3%
m² %
2400 100
X 3
X = 7200/100 = 72
→ academia de ginástica comunitária = 12%
m² %
2400 100
X 12
X = 28800/100 = 288
provando:
60% = 1440m² (visto acima)
creche - 1080
banheiros - 72
academia - 288
1080 + 72 + 288 = 1440 (60%)
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