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3 years ago

6

(1.2x10^5)+(2.4x10^4) what is the sum

1 answer:

Harman [31]3 years ago

7 0

Answer:

2.88x10^9 is the answer

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In a sewage treatment plant, a large concrete tank initially contains 440,000 liters of liquid and 10,000 kg of fine suspended s

viva [34]

Answer:

$Concentration = 8.26kg/m^3$

Step-by-step explanation:

Given

$V = 440000L$ --- volume of tank

$m = 10,000 kg$ --- solid mass

$r = 40000L/hr$ --- outflow rate

Required

Determine the concentration at the end of 4 hours

First, calculate the amount of liquid that has been replaced at the end of the 4 hours.

$Amount = r * Time$

$Amount = 40000L/hr * 4hr$

$Amount = 40000L * 4$

$Amount = 160000L$

This implies that, over the 4 hours; The tank has 160000 liters of liquid out of 440000 liters were replaced

Calculate the ratio of the liquid replaced.

$Ratio = \frac{Amount}{Volume}$

$Ratio = \frac{160000L}{440000L}$

$Ratio = \frac{16}{44}$

$Ratio = \frac{4}{11}$

Next, calculate the amount of solid left.

$Amount (Solid)= Ratio * m$

$Amount (Solid)= \frac{4}{11} * 10000kg$

$Amount (Solid)= \frac{40000}{11}kg$

$Amount (Solid)= 3636kg$

Lastly, the concentration is calculated as:

$Concentration = \frac{Amount (Solid)}{Volume}$

$Concentration = \frac{3636kg}{440000L}$

Convert L to cubic meters

$Concentration = \frac{3636kg}{440000* 0.001m^3}$

$Concentration = \frac{3636kg}{440m^3}$

$Concentration = 8.26kg/m^3$

3 0

3 years ago

Can someone please help me?

Nesterboy [21]

Answer:

2

Step-by-step explanation:

i dont know

8 0

3 years ago

-7-4p-(-5) pls answer

Evgesh-ka [11]

Answer:

-7-20p

Step-by-step explanation:

Did it in my head but generally first parentheses so -1 times by -5 is 5... still there so multiply 5 by -4p, after that no more simplifying to be done as you cant combine or simplify a number with a variable to one that doesn't have a variable.

7 0

3 years ago

Select the correct answer.

givi [52]

Answer:

B

Step-by-step explanation:

The cube of twice a number =

${2m}^{3}$

Decreased by 11 =

$- 11$

Hence, the cube of twice a number decreased by 11 =

${2m}^{3} - 11$

7 0

3 years ago

You will spend 4 hours each day making play

Naddika [18.5K]

Answer:

timetaken to produce a playdough =4hours

a batch of playdough is produced in =1/6 hour

in 1hour,it will take 6 multiplied by a batch of playdough=6 batches of playdough to be produced

4 hours of making playdough in a day will produce=4 multiplied by 6 batches of playdough=24 batches of playdough in a day

4 0

3 years ago