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grandymaker [24]
3 years ago
5

Cobalt-60 has a half-life of about 5 years. How many grams of a 300 g sample will remain after 20 years? A: 0.0625 g

Mathematics
2 answers:
aliina [53]3 years ago
8 0

Your question: Cobalt-60 has a half-life of about 5 years. How many grams of a 300 g sample will remain after 20 years?

Answer: <u>C. 18.75g</u>

That's your answer, good luck mate. <u>Remember to always look through notes, so-forth.</u>

Marina86 [1]3 years ago
4 0
The answer is letter c
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When we have negative exponents, we can move the term with the exponent to the bottom of the fraction. This is also known as multiplying by the reciprocal (and changing the negative exponent to be positive!).

The reciprocal of z^-3 would be 1 / z^3.

Hope this helps!! :)

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3 years ago
Please someone help me with maths​
Nata [24]

Answer:

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<em>c</em><em>)</em><em>=</em><em> </em><em>6x-6</em>

<em>d</em><em>)</em><em>=</em><em> </em><em>2x</em><em>^</em><em>2</em><em>+</em><em>8x-5</em>

<em>e</em><em>)</em><em>=</em><em> </em><em>6x</em><em>+</em><em>9</em>

<em>f</em><em>)</em><em>=</em><em> </em><em>4xy-4y</em><em>^</em><em>2</em><em>+</em><em>8y</em>

<em>g</em><em>)</em><em>=</em><em> </em><em>-12y</em><em>^</em><em>2</em><em>+</em><em>10y</em>

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6 0
3 years ago
Read 2 more answers
Hailey is knitting a scarf. Each half hour, she adds 3/7 inch to the scarf's length. How much length will she add to the scarf i
BARSIC [14]
Take 3/7 and multiply it by 2 to find out how much she knits in one hour. Then take that value and multiply by 12 to find out how much she knits in 12 hours.

3/7 x 2 = 6/7
6/7 x 12 = 72/7 or 10 2/7.
7 0
3 years ago
Definition: An event that is made up of two or more outcomes is called
Illusion [34]
A compound event, I believe
8 0
3 years ago
Enter the values for the highlighted variables that show how to subtract the rational expressions correctly:
LenKa [72]

Answer:

a = 6

x^2 + 6x is equal to x(x+6)

b=2

Denominator and numerator of the first term are multiplied by x. 

c=6

Second term is multiplied by (x-6)/(x-6)

d=2

Now that they have the same denominator, the two terms are combined. 2 is the coefficient of the first term

e=6

In the same way as d is carried over from b, e is carried over from c. 

f = 6

2x - x + 6 = x + 6

g = 1 

We factor out the (x+6) from the numerator and denominator

6 0
3 years ago
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