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andriy [413]
2 years ago
5

A radioactive substance decays exponentially. A scientist begins with 150 milligrams of a radioactive substance. After 20 hours,

75 mg of the substance remains. How many milligrams will remain after 27 hours?
Mathematics
1 answer:
adell [148]2 years ago
6 0

Answer:

Step-by-step explanation:

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Anyone know the answer to this one ?
lys-0071 [83]

Answer:  B) y = 2 · 3ˣ

<u>Step-by-step explanation:</u>

We can see that (2, 18) is a point on the graph.

Plug it into the equations to see which one make a true statement.

        A) y = 1 · 3ˣ

            18 = 1 · 3²

            18 = 1 · 9

             18 ≠ 9

       B) y = 2 · 3ˣ

          18 = 2 · 3²

           18 = 2 · 9

           18 = 18             This works!

       C) y = 3 · 2ˣ

          18 = 3 · 2²

           18 = 3 · 4

           18 ≠ 12

       D) y = 4 · 3ˣ

          18 = 4 · 3²

           18 = 4 · 9

           18 ≠ 36

4 0
2 years ago
What are the factors of
Mkey [24]

Answer:

go to khan academy

Step-by-step explanation:

hope it helps

8 0
3 years ago
Which of the following statements are true. Select all that apply
Nikitich [7]
By definition, rational numbers are numbers that ca be expressed as a fraction that either terminates when divided or repeats when divided.  Integers, on the other hand CANNOT be fractions, so integers are more specific than rational numbers.  So the first statement above is not true.  I just stated that repeating decimals are rational, so the second statement is not true either.  When you divide 715 by -14 you get a number that appears to not terminate or repeat, so the third statement down is true.  Terminating decimals are rational, so the fourth statement down is true.  As for the last one, I am assuming that the ..... you have after that number means it goes on and on and since it doesn't repeat within those numbers you've listed there I'm assuming that it doesn't repeat or terminate so it is not a rational number.  The only 2 statements that are true (or "apply", according to your instructions) are the third and the fourth statements down.
4 0
3 years ago
Read 2 more answers
PLEASE ASNWER ILL GIVE YOU BRAINLIEST
Lena [83]

Answer:

33 1/3%

Step-by-step explanation:

(672 - 600) / 4 = 72 / 4 = $18, which is 33 1/3%

<em>Hope that helps! A Brainliest would be appreciated :)</em>

3 0
3 years ago
Read 2 more answers
Who wants points for now work just put any answer
lbvjy [14]

Answer:

ok

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
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