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charle [14.2K]
3 years ago
14

Select the correct answer.

Mathematics
1 answer:
kati45 [8]3 years ago
3 0

Answer:

25

Step-by-step explanation:

divide 48 by 4 which is 25%

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Estimate the following quantities without using a calculator. Then find a more precise result, using a calculator if necessary.
zubka84 [21]

Explanation:

a. It is so easy to double a number that no approximation is necessary.

  31,000 × 200 = 3.1×10⁴ × 2×10² = 6.2×10⁶ exactly

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b. 6.2×10³ × 5.2×10⁶ ≈ 6×5×10⁹ = 3×10¹⁰ approximately

The approximation can be refined a bit by taking the ".2" into account:

  6.2×10³ × 5.2×10⁶ ≈ (6×5 + .2×(6+5))×10⁹

  = 32.2×10⁹ = 3.22×10¹⁰ approximately

Actual product: 3.224×10¹⁰.

For most purposes, the approximation is an adequate approximation, as it it within 10% of the actual value.

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c. 9×10⁶ -2.3×10⁴ ≈ 9×10⁶ approximately

A better approximation is to actually subtract an approximation of the smaller number:

  9×10⁶ -2.3×10⁴ ≈ (9 - 0.02)×10⁶ ≈ 8.98×10⁶ approximately

The actual value uses all of the digits of the smaller number:

  9×10⁶ -2.3×10⁴ ≈ (9 - 0.023)×10⁶ = 8.977×10⁶ exactly

As in part B, either approximation is adequate for most purposes, as the difference from the actual value is less than .3%.

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The accuracy required of an approximation, hence the work you expend improving accuracy, should depend on the need in the final application of the number. Often, approximations are used for budget or resource planning purposes where some "slop" is allowed or even expected.

They can also be used in engineering applications, where the error needs to be on the side of more safety (rather than less).

7 0
3 years ago
Is figure ABCD a translation of Figure ABCD
timama [110]
The answer is a .. hope this helps .
7 0
3 years ago
The Bowen family's pancake recipe uses 2 teaspoons of baking powder for every
Veseljchak [2.6K]

Answer:

6 teaspoon of salt

Step-by-step explanation:

All you need to do is find how many teaspoon of salt they have in total which in this case they have 1 and there are 3  1/3s  in 1 teaspoon then you just have to do 3 times 2 and you get 6teaspoon of salt.

Hope this helps!

5 0
3 years ago
A human resources manager selected a random sample of 200 workers who donate to charity. The following table shows the distribut
Komok [63]

Answer: B the expected # of management workers donating to charity is 100

Step-by-step explanation:

50% = management so, .50(200)=100

8 0
3 years ago
Lin was looking at the equation 2x-32+4(3x-2462)=14x.she said”I cant tell right away there are no solutions, because on the left
ryzh [129]
Disagree with Lin: There are no solutions because 12x+2x is equal to 14x, if 14x=14x on both sides, the x variable can be cancelled out since they have the same slope
8 0
3 years ago
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