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vaieri [72.5K]
4 years ago
8

3: Bismuth-210 has a half-life of about 5 days. After 15 days, how many milligrams of a 600 mg sample will remain? A O 75 mg B O

150 mg C 200 mg D 475 mg
Mathematics
2 answers:
Delvig [45]4 years ago
8 0
Only 75 g will still be there after 15 days.
allochka39001 [22]4 years ago
5 0
Radiologically, half lives describe the amount of time it takes for half the amount of the radioactive substance to decay. If you had 100g of a radioactive substance with a half life of one week, in seven days, only 50g would remain, and after another week, only 25g.

Fifteen days contains three half lives since the half life is 5 days long. Divide the starting amount by 2 for each half life that passes.

600g - 300g (1 HL) - 150g (2 HL) - 75g (3 HL)

So, only 75g of Bismuth-210 would remain after 15 days.
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ABCD is a trapezoid. Point E is the midpoint of AD and point F is the midpoint of B.
VikaD [51]
2 cm. because you would subtract 5 and 3.
6 0
3 years ago
10................/......
jolli1 [7]

Answer:

<h2><u>-1 + √3 or -(1 - 2√3)</u></h2>

Step-by-step explanation:

(1 + √3) (2 - √3) = 2 - √3 + 2√3 - 3 = 2 - 3 - √3 + 2√3 = <u>-1 + √3 or -(1 - 2√3)</u>

6 0
4 years ago
Read 2 more answers
Let $f$ be a function such that $f(x+y) = x + f(y)$ for any two real numbers $x$ and $y$. if $f(0) = 2$, then what is $f(2012)?$
marusya05 [52]

<span>Given:

f(0) = 2</span>

So first of all, we let x = 2012, y = 0: 

<span>
Then, F(2012) = 2012 + f(0)

Since f(0) = 2, then f(2012) = 2012 + 2 = 2014.

To add, </span>the process that relates an input to an output is called a function.

 

 

<span>There are always three main parts of a function, namely:

</span>Input

The Relationship

The Output

 

The classic way of writing a function is "f(x) = ... ".

 

What goes into the function is put inside parentheses () after the name of the function: So, f(x) shows us the function is called "f", and "x" goes in.

 

 

What a function does with the input can be usually seen as:

 

<span>f(x) = x2</span><span> reveals to us that function "f" takes "x<span>" and squares it.</span></span>

3 0
3 years ago
You may use a calculator to complete this test. if 1 egg and 1/3 cup of oil are needed for each bag of brownie mix, how many bag
iren [92.7K]
Answer: 3 Bags

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1*3=3
1/3*3=1
4 0
3 years ago
Please help, I'm trying to finish these
umka2103 [35]

2 x length + 2 x width = perimeter.

2(2s-5) + 2(4s-13) = 108

Simplify:

4s-10 + 8s-26 = 108

Combine like terms:

12s - 36 = 108

Add 36 to both sides:

12s = 144

Divide both sides by 12:

s = 144/12

s = 12

Now replace s with 12 in each equation:

2(12) - 5 = 24-5 = 19

4(12) - 13 = 48-13 = 35

The answer is d. 35,35, 19,19

8 0
3 years ago
Read 2 more answers
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