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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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Use the given information to find the unknown value:y varies inversely with a. When x = 4, then y= 4. Find y when I = 2.Iyy =hel
Mashutka [201]

Inverse variation:

y=\frac{k}{x}

k is a constant

Use the given information (when x=4 y=4) to find the value of the constant:

\begin{gathered} 4=\frac{k}{4} \\  \\ \text{Multiply both sides of the equation by 4:} \\ 4\times4=4\times\frac{k}{4} \\  \\ 16=k \\  \\  \\ k=16 \end{gathered}

Then, the given relationship has the next equation:

y=\frac{16}{x}

Use the equation above to find y when x=2:

\begin{gathered} y=\frac{16}{2} \\  \\ y=8 \end{gathered}Then, when x=2, y=8
3 0
1 year ago
The Coffee Counter charges ​$8.00 per pound for Kenyan French Roast coffee and ​$10.00 per pound for Sumatran coffee. How much o
Tcecarenko [31]

Answer:

x = 9

y = 9

Step-by-step explanation:

Given :

Let :

Kenyan French roast coffee = x

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Sumatran Coffee = y

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x + y = 18 - - - - (1)

8x + 10y = 9 * 18 ;

8x + 10y = 162 - - - - (2)

From (1):

x = 18 - y

Put x = 18 - y in (2)

8(18 - y) + 10y = 162

144 - 8y + 10y = 162

2y = 162 - 144

2y = 18

y = 9

x = 18 - y

x = 18 - 9

x = 9

4 0
3 years ago
Find the equation of the line perpendicular to y=3/2x-9 and passes through the point (6,2)​
lys-0071 [83]

Answer:

y=-2/3x-2

Step-by-step explanation:

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y=-2/3x+b

enter the given points

2=4+b

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6 0
3 years ago
NEED HELP FAST!!! picture is attached.
yuradex [85]
I think the answer could be C
6 0
2 years ago
If cos theta = 0.5, find sec theta. A. 0.25 B. 0.5 C. 1 D. 2
Vsevolod [243]
Sec theta = 1/cos theta = 1/0.5 = 2

Option D is the correct answer.
4 0
3 years ago
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