3 years ago

Which fraction is equivalent to 1.18?

Mathematics

2 answers:

cupoosta [38]3 years ago

4 0

Answer:

117/99 since there is a bar above the 1.18 it means it is repetitive

Step-by-step explanation:

Snowcat [4.5K]3 years ago

3 0

Answer:

D=117/99

Step-by-step explanation:

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tank contains 250 liters of fluid in which 20 grams of salt is dissolved. Pure water is then pumped into the tank at a rate of 5

eimsori [14]

Solution :

Given data :

$c_{in}$ = 1 g/L

$r_{in}$ = 5 L/min

$r_{out}$ = 5 L/min

$v_0$ = 250 L

$A_0$ = 20 g

∴ $r_{net} = r_{in}- r_{out}$

= 5 - 5

= 0

$c_{out} = \frac{A}{250} \ g/L$

Now, $\frac{dA}{dt}=(r_{in} \times c_{in}) - (r_{out} \times c_{out})$

$\frac{dA}{dt} = 5-5\left(\frac{A}{250}\right)$

$\frac{dA}{dt}+5 \left(\frac{A}{250}\right) = 5$

$\frac{dA}{dt}+5 \left(\frac{A}{250}\right) = 5 \text{ with} \ A_0 = 20$

Integrating factor = exp(5 t/250)

Therefore,

$A \times \exp (5t \ /250) = \text{integral of}\ 5 \times \exp (5t / 250) + C$

Put $A_0=250+C$

C = -230

$A \times \exp(5t/250) = 250 \exp(5t/250) + (-230)$

$A(t) = 250-230 \exp(-5t/250)$

$A(t) = 250-230e^{\left(\frac{-t}{50}\right)} \ g$

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3 years ago

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Nana76 [90]

Answer:

Step-by-step explanation:

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3 years ago

Anyone 100% know #12

Shkiper50 [21]

Repetition. “do not”

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For which operations is the set {–1, 0, 1} closed? Choose all answers that are correct. A. addition B. division C. multiplicatio

spayn [35]

Hello,

Addition : no because -1+(-1)=-2 not in set.
Division : no because 1/0 is not in the set :infinity
Multiplication yes: {-1,0,1}*{-1,0,1}={-1,0,1}
Substraction: No because (-1)-(1)=-2 not in set.

Answer C

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3 years ago

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Eduardwww [97]

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4 years ago

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