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3 years ago

13

Miguel e nádia trabalham num escritório de contabilidade. A cada 45 minutos miguel vai á sala de café para relaxar um pouco, enq

uanto nádia faz o mesmo a cada 60 minutos. Se eles acabarem de se encontrar na sala de café, daqui a quantas horas vão se rever nesse mesmo lugar?

1 answer:

Kazeer [188]3 years ago

6 0

Responder:

3 horas

Explicação passo a passo:

Dado :

Miguel a cada 45 minutos

Nádia a cada 60 minutos

Número de horas que eles vão se ver no mesmo lugar:

Para fazer isso ;

Obtenha o menor múltiplo comum de 60 e 45

Múltiplos de:

45: 45, 90, 135, 180, 225.

60: 60, 120, 180, 240, 300.

O menor múltiplo comum de 45 e 60 é 180

° Assim, eles se verão no mesmo lugar após 180 minutos;

Número de horas = 180/60 = 3 horas

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Geometry help please

lina2011 [118]

Hello!

The equation to find the volume of a cone is

$\pi r^{2} \frac{h}{3}$

r is radius
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Put in the values we know

$3.14 * 9^{2} * \frac{4}{3}$

Square the number

$3.14 * 81 * \frac{4}{3}$

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7 0

3 years ago

The volume of a gas varies directly with its temperature and inversely with the pressure. If the volume of a certain gas is 15 c

vladimir2022 [97]

Answer:

Therefore the volume of the gas is 32 cubic feet.

Step-by-step explanation:

Given that,

The volume of a gas varies directly with its temperature and inversely with the pressure.

$V\propto \frac{T}{P}$

V= Volume of the gas at constant mass

T= Temperature at constant mass

P= pressure at constant mass

$\frac{V_1}{V_2}=\frac{\frac{T_1}{T_2}}{\frac{P_1}{P_2}}$

$\therefore \frac{V_1}{V_2}=\frac{T_1P_2}{T_2P_1}$ .

Given that,

At constant mass, the volume of a certain gas is 15 cubic feet and a pressure of 40 pound per square inch at a temperature 300 k.

$V_1$ =15 cubic feet, $P_1$ =40 pound per square inch and $T_1$ = 300 K

$V_2=?$ , $P_2$ =20 pound per square inch and $T_2$ = 320k

$\therefore \frac{V_1}{V_2}=\frac{T_1P_2}{T_2P_1}$ .

Plugging all values

$\frac{15}{V_2}=\frac{300\times 20}{320\times 40}$

$\Rightarrow V_2=\frac{15\times 320\times 40}{300\times 20}{}$

$\Rightarrow V_2=32$ cubic feet

Therefore the volume of the gas is 32 cubic feet.

4 0

3 years ago

Is 0.0004 greater or less than 0.000073

VARVARA [1.3K]

The 4 is closer to the decimal point than the 7 is, so 0.0004 is a greater number.

3 0

3 years ago

Please help!! Will mark brainleist!

Dima020 [189]

I think it’s encyclopedia but i’m not 100% sure i’m sorry if it’s wrong :(

5 0

3 years ago

Read 2 more answers

X:y=56 and x+y= 56<br> work out x-y

stepan [7]

Answer:

$x - y = 54.035$

Step-by-step explanation:

We have the simultaneous equations:

$x:y = 56$

and

$x + y = 56$

The first equation can be rewritten as:

$\frac{x}{y} = 56$

This means

$x = 56y$

Put this last equation into the second equation;

$56y + y = 56$

$57y = 56$

$y = \frac{56}{57}$

$x = 56 \times \frac{56}{57}$

$x = \frac{3136}{57}$

$x - y = \frac{3136}{57} - \frac{56}{57}$

This implies that:

$x - y = \frac{3136 - 56}{57}$

$x - y = \frac{3080}{57}$

$x - y = 54.035$

6 0

4 years ago