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stellarik [79]
3 years ago
13

The amount of a radioactive substance decreases by 10% every

Mathematics
1 answer:
uranmaximum [27]3 years ago
3 0

Answer:

Step-by-step explanation:

We would apply the formula,

y = ab^t

Where

a represents the initial amount of substance.

t represents the decay time.

From the information given

a = 100

t = 12 hours

Since after 12 hours, the amount of substance reduces by 0.1, then

y = 0.1 × 100 = 10

Therefore

10 = 100 × b^12

Dividing through by 100, it becomes

0.1 = b^12

Raising both sides of the equation by 1/12, it becomes

0.1^(1/12) = b^12/12

b = 0.8

The equation becomes

y = 100(0.8)^t

Where t = n, the expression becomes

y = 100(0.8)^n

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jill has not yet studied the angle measurement requirements to form a triangle. She begins to draw side AB as a horizontal segme
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Answer:

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Step-by-step explanation:

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5 0
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Read 2 more answers
Can someone help me understand how to solve a two variable equation I am really lost
Llana [10]
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So there will normally be 2(ormore)equations given. 
Say 
X+Y= a
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X  = a - Y 
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since we know X = a-Y, 
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hence finding Y, we sub the value for Y into X = a-Y and we get X also . 

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