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2 years ago

What is 0.02% written as a decimal? A. 0.0002 B. 0.002 C. 0.02 D. 0.2

Mathematics

1 answer:

trasher [3.6K]2 years ago

7 0

Answer:

Step-by-step explanation:

Well pretty simple the percent means 0.02/100 move the decimal point to the left by 2 places to get 0.0002 Hope this is helpful!

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Which shows the correct substitution of the values a, b, and c from the equation –2 = –x + x2 – 4 into the quadratic formula?

dimaraw [331]

Answer:

We substitute $x=\frac{-(-1)+/-\sqrt{(-1)^2-4(1)(-2)} }{2(1)}$

And simplify $x=\frac{1+/-\sqrt{1-4(1)(-2)} }{2}$

Step-by-step explanation:

First we rearrange the equation -2=-x+x2-4 into standard form of a quadratic $ax^2+bx+c=0$ . This equation becomes $x^2-x-2=0$ where a=1, b=-1, and c=-2.

The formula is:

$x=\frac{-b+/-\sqrt{b^2-4ac} }{2a}$ .

We substitute $x=\frac{-(-1)+/-\sqrt{(-1)^2-4(1)(-2)} }{2(1)}$

And simplify $x=\frac{1+/-\sqrt{1-4(1)(-2)} }{2}$

$x=\frac{1+/-\sqrt{1+8} }{2}$

$x=\frac{1+/-\sqrt{9} }{2}\\x=\frac{1+/-3 }{2}\\x=2,-1$

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3 years ago

Determine the type of bias involved. A pool store owner wants to determine the effect of algaecide brands on the treatment of po

inn [45]

Answer:

Step-by-step explanation:

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3 years ago

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Gnesinka [82]

Answer:

540

Step-by-step explanation:

No matter what the shape, the total amount of degrees in the interior angles in a pentagon is 540. Hope this helps!

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4 years ago

What is the area of the sector? Either enter an exact answer in terms of \piπpi or use 3.143.143, point, 14 for \piπpi and enter

n200080 [17]

Question:

What is the area of the sector? Either enter an exact answer in terms of π or use 3.14 and enter your answer as a decimal rounded to the nearest hundredth.

Answer:

See Explanation

Step-by-step explanation:

The question is incomplete as the values of radius and central angle are not given.

However, I'll answer the question using the attached figure.

From the attached figure, the radius is 3 unit and the central angle is 120 degrees

The area of a sector is calculated as thus;

$Area = \frac{\alpha }{360} * \pi r^2$