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Fofino [41]
4 years ago
6

What are the answers to These 3 questions?

Mathematics
1 answer:
STALIN [3.7K]4 years ago
5 0
1) As a start you have 100% of contaminants: so
 the 1st filtration you removed 70% & remaining 30%
the 2nd filtration you removed 70% of the 30% (=21%) & remaining (30%-21%)
 or 9%
the 3rd filtration removed 70% of the 9% (=6.30%) & remaining (9%-6.3%)
 or 2.7%
the 4th filtration removed 70% of the 2.7% (1.89%) & remaining (2.7%-1.89%)
 or 0.81%
Follow the same logic for all remaining question.
You might be interested in
Upon descent, an airplane is 20,000 feet above the ground. The air traffic control tower is 200 feet tall. It is determined that
PIT_PIT [208]

Answer:

Base length of plane from control tower = 73,880 feet (Approx.)

Step-by-step explanation:

Given:

Height of plane from ground = 20,000 feet

Height of control tower = 200 feet

Angle of elevation from control tower = 15°

Find:

Base length of plane from control tower

Computation:

Height of plane from control tower = 20,000 - 200

Height of plane from control tower = 19,800 feet

Tan θ = Perpendicular / Base

Tan15 = 19,800 / Base length of plane from control tower

0.268 = 19,800 / Base length of plane from control tower

Base length of plane from control tower = 73,880 feet (Approx.)

6 0
3 years ago
What is the mean of caffeine content in soda drinks (to the nearest whole number)
frutty [35]
The mean of the data set is 26 because the sum of all the data points divided by the number of data points is 26.4 repeating which rounds to 26.
4 0
3 years ago
4(x-4)-3x=10 what is the answer
max2010maxim [7]

Answer:

26

Step-by-step explanation:

4(x-4)-3x=10

  • Rule = a(b + c) = ab + ac
  • Rule = a(b - c) = ab - ac

4(x-4) = 4x - 16

4(x-4)-3x=10

4x - 16 - 3x = 10

x - 16 = 10

x -16 +16 = 10 +16

x = 26

Hope this helps ^-^

6 0
3 years ago
Below is a magic square, meaning that the sum of the numbers in each row, in each column, and in each of the $2$ main diagonals
Mariulka [41]

The property  of equality of the rows, columns, and diagonals in the magic

square can be used to find the value of <em>n</em>.

The value of <em>n</em> is 6

Reasons:

The magic square can be presented as follows;

\begin{array}{|c|c|c|}n-2&3&n + 2\\n + 3&n - 1&1\\2&2 \cdot n - 5&n\end{array}\right]

Given that the sum of the numbers in each row and in each column and in

each of the two diagonals are equal, to find the value of <em>n</em>, two rows having

different number of the variable <em>n</em> can be equated as follows;

The top row = n - 2 + 3 + n + 2 = The bottom row = 2 + 2·n - 5 + n

n - 2 + 3 + n + 2 = 2 + 2·n - 5 + n

2·n + 3 =  3·n - 3

3·n - 3 = 2·n + 3 (symmetric property)

3·n - 2·n = 3 + 3

n = 6

Learn more here:

brainly.com/question/17355019

brainly.com/question/20477897

brainly.com/question/8183549

4 0
3 years ago
What is the factored form of x2 − 4x − 5?
k0ka [10]
The answer would be D....
4 0
3 years ago
Read 2 more answers
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