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mamaluj [8]
3 years ago
15

out of 840 discs tested, 38 are defective. estimate the number of defective discs in a batch of 43000

Mathematics
2 answers:
Naddik [55]3 years ago
5 0
About 195 since its an estimate. :)
Butoxors [25]3 years ago
4 0
Proportion of 840 over 38 and 43000 over x.
1,945 would be defective.
Hope this helps and please give brainliest!
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A 2-column table has 5 rows. The first column is labeled x with entries negative 2, negative 1, 0, 1, 2. The second column is la
Minchanka [31]

The exponential function which represented by the values in the table is f(x)=4(\frac{1}{2})^{x} ⇒ 3rd answer

Step-by-step explanation:

The form of the exponential function is f(x)=a(b)^{x} , where

  • a is the initial value (when x = 0)
  • b is the growth/decay factor
  • If k > 1, then it is a growth factor
  • If 0 < k < 1, then it is a decay factor

The table:

→  x    :    f(x)

→ -2    :    16

→ -1     :    8

→  0    :    4

→   1    :    2

→   2   :     1

∵ f(x)=a(b)^{x}

- To find the exponential function substitute the value of x and f(x)

  by some values from the table to find a and b, at first use the

  point (0 , 4) to find the value of a

∵ x = 0 and f(x) = 4

∴ 4=a(b)^{0}

- Remember that any number to the power of zero equal 1

  except the zero

∵ b^{0}=1

∴ 4 = a(1)

∴ a = 4

Substitute the value of a in the equation

∴ f(x)=4(b)^{x}

- Chose any other point fro the table to find b, lets take (1 , 2)

∵ x = 1 and f(x) = 2

∴ 2=4(b)^{1}

∴ 2 = 4 b

- Divide both sides by 4

∴ b=\frac{2}{4}=\frac{1}{2}

- Substitute the value of b in the equation

∴ f(x)=4(\frac{1}{2})^{x}

The exponential function which represented by the values in the table is f(x)=4(\frac{1}{2})^{x}

Learn more:

You can learn more about the logarithmic functions in brainly.com/question/11921476

#LearnwithBrainly

8 0
3 years ago
Read 2 more answers
A linear model projects that the number of bachelor's degrees awarded in the United State will increase by 19,500 each year. In
vichka [17]
Let the number of years after 2001 be x, then
1280000 + 19500x = 1700000
19500x = 1700000 - 1280000 = 420,000
x = 420000/19500 = 22 years.
x = 22 years.
6 0
3 years ago
At the farmer's market, there is a scale that measures the weight of fruit and vegetables. The needle is 16 cm long, and it rota
Eddi Din [679]
It may help to draw a picture as you start planning this problem and draw a circle, showing a circle which represents the scale needle's range of motion 360 degrees around. The needle length will then be the radius of that circle.

We know that the needle rotated 68 degrees and are trying to find the distance it traveled in cm. To find out how far the needle traveled, we need to find the arc length - in this case, the distance between the needle's starting point and where it ended up after the oranges were placed on the scale on the circle.

There is a formula you can easily use to find the arc length
arc length = 2*\pi*r ( \frac{c}{360} )

We need to input the radius, r into this formula, as well as the central angle measure c, which in this case is 68 degrees.

2\pi(16) ( \frac{68}{360} )

If you multiply the above formula components all together using a calculator, you will get ~18.99. (When rounded to the second decimal place.)

So, the answer is around 19 cm. (Your answer may vary depending on how your teacher usually wants you to round answers.)
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3 years ago
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Find the area of a regular hexagon whose apothem is 1.7cm and a side length is 2cm
tia_tia [17]

Answer: 10.2 cm^2

Step-by-step explanation:

A regular hexagon is composed of 6 regular triangles whose area is equal to half of the product of the apothem and side.

A - triangle = (1/2)(a)(s) = (1/2)(1.7 cm)(2 cm) = 1.7 cm²

Multiplying this area by 6 to get the area of the hexagon gives us the answer which is 10.2 cm².

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3 years ago
Clear Prints charges $2 per
Nookie1986 [14]

Answer:idk

Step-by-step explanation:

Idk

8 0
4 years ago
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