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Ksivusya [100]
2 years ago
13

A 33 gram sample of a substance that's

Mathematics
1 answer:
Mazyrski [523]2 years ago
6 0

9514 1404 393

Answer:

  6.2

Step-by-step explanation:

We presume your "k-value" is the k in the exponential decay term ...

  e^(-kt) . . . where t is the number of time units

This is 1/2 when ...

  ln(1/2) = -kt

  t = ln(1/2)/(-k) = ln(2)/k

  t = 0.69315/0.1124 ≈ 6.2

The half life is about 6.2 time units.

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A girl scout was selling boxes of cookies. In a month, she sold both boxes of chocolate chip cookies ($1.25 each) and boxes of p
Katena32 [7]

Answer:

Number of plain cookie boxes sold = 785 boxes

Step-by-step explanation:

Given: Cost of a chocolate chip cookie box = $1.25

Cost of a plain cookie box = $0.75

Total number of boxes sold = 1585

Total cost of the sold boxes = $1588.75

Let, number of plain cookie boxes sold = x

Number of chocolate chip cookie boxes sold = 1585 - x

So,

Total cost = total cost of the sold plain cookie boxes + total cost of the sold chocolate chip cookie boxes

$1588.75 = x ($0.75) + (1585 - x) ($1.25)

1588.75 = 0.75 x + 1981.25 - 1.25 x

0.5 x = 392.5

Therefore,

<u>Number of plain cookie boxes sold: x = 392.5 ÷ 0.5 = 785 boxes</u>

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3 years ago
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inn [45]

X>43/3

Or X>29/3

Depending if you mean (7-2)/3 or 7-(2/3)

5 0
3 years ago
Percy paid $24.10 for a basketball. The price of the basketball was $22.99. What was the sales tax rate?
Bess [88]
The correct answer that I think it is B
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A packet of sweets contains only blue and red sweets the ratio of blue to red sweets in a packet is 2:1 if there are 12 sweets i
storchak [24]
4.
Ratio of blue = 1
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1/3 x 12 = 4
8 0
3 years ago
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Converting a decimal to a mixed number and as a improper fraction, please help...
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The answer to your question:

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