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denis23 [38]
3 years ago
7

A radioactive substance has a decay rate of 2.3% per year. What is its half life? Give your answer correct to 2 decimal places.

Mathematics
1 answer:
tatiyna3 years ago
8 0
Please send a message me a picture of the problem and I think it is .023
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A marketing company surveys 100 males and 100 females between the ages of 55 and 70 to determine how many times they text each d
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On average, females text more than males.

Step-by-step explanation:

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Thomas bought a desk with a retail sales price of $129 and  paid $10.32 sales tax. What is the sales tax rate where Thomas bough
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John and Ellen bought a big pizza. Ellen are 2/4 of the pizza and John ate 1/3 of pizza. How much did they eat all together? How
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Answer:

<em>Pizza eaten together: 5/6,</em>

<em>Pizza left over: 1/6</em>

Step-by-step explanation:

~ If Ellen ate 2/4th of the pizza and John ate 1/3 of the pizza, provided that the pizza counts as a whole ( 1 )... ~

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2. To see how much they ate together we would neglect that the pizza counts as a whole but simply add 1/2 by 1/3rd.

3. Through simple algebra: 1/2 + 1/3 = 3/6 + 2/6 = <em>Pizza eaten together: 5/6</em>

4. Now to find out how much pizza was left over, we would need the fact that a pizza ⇒ 1 whole. It would be that 1 - 1/2 - 1/3 ⇒ Pizza left over, through the <em>Partition Postulate. </em>In fact, the pizza left over would simply be 1 whole - the pizza eaten together ( 5/6 ).

5. Through algebra: 1 - 1/2 - 1/3 = 1 - 5/6 = <em>Pizza left over: 1/6</em>

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3 years ago
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Answer:

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Step-by-step explanation:

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hope it helps :)

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