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Virty [35]
3 years ago
11

A sample of a radioactive isotope had an initial mass of 450 mg in the year 2005 and decays exponentially over time. A measureme

nt in the year 2012 found that the sample's mass had decayed to 310 mg. What would be the expected mass of the sample in the year 2017, to the nearest whole number?
Mathematics
1 answer:
yawa3891 [41]3 years ago
8 0

Answer: 238

Step-by-step explanation:

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alexandr1967 [171]

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3 years ago
The ratio of the side lengths of a quadrilateral is 3:2:6:7, and its perimeter is 126 meters. What is the length of the shortest
scoundrel [369]

since the lengths of all those four sides are in a 3:2:6:7 ratio, and the whole perimeter is 126, what we do is, simply divide the whole by (3+2+6+7) and distribute accordingly.


\bf \stackrel{3\cdot \frac{126}{3+2+6+7}}{3}~~:~~\stackrel{2\cdot \frac{126}{3+2+6+7}}{2}~~:~~\stackrel{6\cdot \frac{126}{3+2+6+7}}{6}~~:~~\stackrel{7\cdot \frac{126}{3+2+6+7}}{7} \\\\\\ 3\cdot \cfrac{126}{18}~~:~~2\cdot \cfrac{126}{18}~~:~~6\cdot \cfrac{126}{18}~~:~~7\cdot \cfrac{126}{18} \\\\\\ 21~~:~~\stackrel{shortest}{14}~~:~~42~~:~~49

7 0
3 years ago
Can someone help me with this question I don't know how to subtract a whole number by a fraction
BlackZzzverrR [31]
Part A:

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18*\frac{1}{3}=\frac{18}{3}=6l

Pineaplle Juice

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Part B:

18*\frac{4}{9}=\frac{72}{9}=8l

June have 8l of fruit puch left.

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5 0
3 years ago
Read 2 more answers
At the West Street Bakery, 16
Leviafan [203]

Answer is in the photo. I can only upload it to a file hosting service. link below!

tinyurl.com/wpazsebu

5 0
3 years ago
Find the volume of the rectangular prism.<br> IN<br> in.<br> 4 in.<br> 9-in.<br> 2<br> I
prisoha [69]

Answer:

V = 36 in³

Step-by-step explanation:

The volume of a rectangular prism is given by the formula V = l × w × h

Here our length is 9\frac{1}{2}, our width is 4, and our height is 4\frac{1}{2}

Plugging in these values to our formula give us V=(9\frac{1}{2})(4)(4\frac{1}{2})= 36

V = 36 in³

6 0
4 years ago
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