# 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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