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loris [4]
3 years ago
8

katie collected 470 cans the first week of the school project. The second week she collected 105 less than the first week. How m

any cans did she collect in the second week.
Mathematics
1 answer:
valentinak56 [21]3 years ago
8 0

Answer:

Katie collected 365 cans in the second week.

Step-by-step explanation:

Because Katie collected 470 cans in the first week, and 105 less in the second week, we know to subtract 105 from 470, which gives us 365 cans.

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The perimeter of a square with side length s is P=
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4s

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Which statements are true about the solution 2 < x - 7 and its graph? Check all that apply.
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Answer:

O   x >9

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Step-by-step explanation:

<u><em>Explanation:-</em></u>

<em>Given   2 < x-7</em>

<em>adding '7' on both sides, we get</em>

<em>⇒   2 + 7 < x -7 +7</em>

<em>⇒  9 < x</em>

<em>⇒  x>9</em>

<em>Given inequality   2 < x -7</em>

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<u><em>Final answer</em></u>:-

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If you have lived for a million seconds, how many birthdays have you had?
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It's possible that you might have one birthday within that length of time,
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Mrs. Green places balls in a tub for a party.
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2 years ago
The half life of uranium-232 is 68.9 years. (show step by step)
dalvyx [7]

Answer:

1.) 8.09g ; 2) 206.7 years

Step-by-step explanation:

Given the following :

Half-life(t1/2) of Uranium-232 = 68.9 years

a) If you have a 100 gram sample, how much would be left after 250 years?

Initial quantity (No) = 100g

Time elapsed (t) = 250 years

Find the quantity of substance remaining (N(t))

Recall :

N(t) = No(0.5)^(t/t1/2)

N(250) = 100(0.5)^(250/68.9)

N(250) = 100(0.5)^3.6284470

N(250) = 100 × 0.0808590

= 8.0859045

= 8.09g

2) If you have a 100 gram sample, how long would it take for there to be 12.5 grams remaining?

Using the relation :

N / No = (1/2)^n

Where N = Amount of remaining or left

No = Original quantity

n = number of half-lifes

N = 12.5g ; No = 100g

12.5 / 100 = (1/2)^n

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Converting 0.125 to fraction

(1/8) = 1/2^n

8 = 2^n

2^3 = 2^n

n = 3

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Number of half life's (n) = t / t1/2

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3 = t / 68.9

t = 3 × 68.9

t = 206.7 years

7 0
3 years ago
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