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german
3 months ago
9

Last year, sales at a book store increased from $5,000 to $10,000. This year, sales decreased to $5,000 from $10,000. What perce

ntage did sales increase last year? What percentage did sales decrease this year?
Mathematics
2 answers:
Leona [12.6K]3 months ago
5 0

Solution:

We know that

The preceding year, the bookstore's sales rose from $5,000 to $10,000.

We determine percentage increase using the formula

Percentage increase=\frac{change}{Initial}*100

By substituting the values, we obtain

Percentage increase=\frac{10000-5000}{5000}*100

Percentage increase =\frac{5000}{5000}*100=100 %.

<pThis year, sales declined to $5,000 from $10,000.

Percentage Decrease =\frac{change}{Initial}*100

By substituting the corresponding figures, we observe

Percentage Decrease =\frac{10000-5000}{10000}*100

Percentage Decrease =\frac{5000}{10000}*100=50 %.

Svet_ta [12.7K]3 months ago
4 0
1. 200% =2
5000 multiplied by 2 equals 10000
2.50% = 0.5
10000 multiplied by 0.5 equals 5000
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The flea experiences an acceleration of 1,000 m/s².

Detailed explanation

This scenario involves motion with constant acceleration.

The relevant variables include the following.

\boxed{u \ or \ v_i = initial \ velocity}

\boxed{u \ or \ v_t \ or \ v_i = terminal \ or \ final \ velocity}

\boxed{a = acceleration \ (constant)}

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We know the flea attains a takeoff velocity of 1.0 m/s over a distance of 0.50 mm.

The flea starts from rest, so the initial velocity is zero. The question asks for the flea's acceleration during leg extension.

The equation we apply is:

\boxed{ \ v^2 = u^2 + 2ad \ }

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First, convert 0.50 mm to meters: \boxed{0.50 \ mm = 0.50 \times 10^{-3} \ m = 5.0 \times 10^{-4} \ m}

Solution steps:

Rearrange the formula to isolate acceleration (a).

\boxed{ \ v^2 = u^2 + 2ad \ }

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\boxed{ \ 2ad = v^2 - u^2 \ }

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\boxed{ \ a = \frac{(1.0)^2 - (0)^2}{2(5.0 \times 10^{-4})} \ }

\boxed{ \ a = \frac{1}{10 \times 10^{-4}} \ }

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\boxed{ \ a = 1 \times 10^{3}\ = 1,000 \ m/s^2 \ }

This yields the flea's acceleration as 1,000 m/s².

Additional resources

  1. Scientific notation: brainly.com/question/7263463
  2. Determining substance mass: brainly.com/question/4053884
  3. Conversion into cubic units: brainly.com/question/1446243

Keywords: flea, jumping, leg extension, takeoff velocity, initial speed, displacement, acceleration, constant acceleration, unit conversion

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