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Naddika [18.5K]
3 years ago
7

The half-life of chromium-51 is 28 days. If the sample contained 5.10 grams, how much chromium was present 168 days ago?

Mathematics
1 answer:
stepan [7]3 years ago
3 0
I don’t understand how many grams had the first one,so I can’t help you
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What is the equation, in slope intercept form, with two points of (-9,-8) and (2,-4)?
aleksandr82 [10.1K]
I think It would be -4-(-8)/2-(-9)=-4+8/2+9=4/11 is the equation by using y2-y1/x2-X1

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7 0
3 years ago
​PLEASE HELP! I will give you the brainiest and A LOT of points!
Alja [10]

Answer:The solution is in the attached file

Step-by-step explanation:

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3 years ago
How is associative property like commutative property
CaHeK987 [17]
They give you the same answer it just that one has parenthesis and the other one doesn't.
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3 years ago
I have no idea how to solve this
Pavlova-9 [17]
  • <em>Answer:</em>

<em>x = 25</em>

  • <em>Step-by-step explanation:</em>

<em>Hi there ! </em>

  • <em><u> the opposite angles are equal</u></em>

<em><u>4x - 25 = 25 + 2x</u></em>

<em><u>4x - 2x = 25 + 25</u></em>

<em><u>2x = 50</u></em>

<em><u>x  = 50 : 2</u></em>

<em><u>x = 25</u></em>

<em><u>Good luck ! </u></em>

7 0
3 years ago
A combination lock has 25 numbers on it. How many different 3-digit lock combinations are possible if no digit can be repeated?
IgorC [24]

Answer:

The number of ways is 13,800 ways

Step-by-step explanation:

In this question, we are tasked with calculating the number of ways to form 3-digits codes from 25 different numbers given that no repetition is allowed.

Now, for the first digit, we have all the 25 numbers completely wanting to take a spot. Now, in how many ways can we choose a single out of 25, that would be 25 ways

Now, we have 24 numbers left, and we are trying to pick one, the number of ways this can be done is 24 ways also

for the last digit, we have 23 numbers and we are selecting just one, the number of ways this can be done is 23 ways too

Thus, the cumulative number of ways would be 25 * 24 * 23 = 13,800 ways

7 0
3 years ago
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