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In-s [12.5K]
3 years ago
13

a scientist has grams of a radioactive substance. write an expression that shows the amount of the substance that remains after

one half life.​
Mathematics
1 answer:
KATRIN_1 [288]3 years ago
4 0
X=1/2 d would be the equation
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I need to know what the ansswer is to this we are doing pemdas
mamaluj [8]

Answer:

18

Step-by-step explanation:

10-4+6(4-2)

10-4+6(2)

10-4+12

6+12

=18

8 0
3 years ago
Mrs. Reid is going on a trip. She has 9 book that she hasn't ready yet, but she wants to bring only 3 on the trip.
Karo-lina-s [1.5K]
The way you work this out is by thinking about the odds of each singular event, then finding the overall odds based on the individual odds.

The number of different books Mrs. Reid can choose is 9, so the first number is 9.

Mrs. Reid has picked one book so far, so now she has (1 - 9) = 8 books to choose from.
The of different books Mrs. Reid can choose now is 8, so your second number is 8.

Mrs. Reid has picked 2 book thus far, so now there are (2 - 9) = 7 books to choose from.
The of different books Mrs. Reid can choose now is 7, so your second number is 7.

To get the total number of different choices, multiply all the singular events together:

7*8*9=504\ different\ ways\ to\ bring\ 3\ books
7 0
3 years ago
What is the product of the fractions represented by these two area models?
Hoochie [10]

Answer:You'll have to show us what 2 area models

Step-by-step explanation:

5 0
3 years ago
Simplify the radical expression below.<br><br><img src="https://tex.z-dn.net/?f=3%20%5Csqrt%7B7%7D%20-%20%5Csqrt%7B63%7D%20" id=
anzhelika [568]

So for this, we can simplify √63 as such:


\sqrt{63}=\sqrt{7*9}=3\sqrt{7}


Using the simplified version of √63, we can solve it:


3\sqrt{7} -3\sqrt{7} =0


Zero is your final answer.

4 0
3 years ago
Jeanne makes hair bows to sell at the craft fair each bow requires 5yards of ribbon at the fabric store ribbon is sold by a foot
Karolina [17]

Answer:

1260

Step-by-step explanation:

7 0
3 years ago
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