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defon
3 years ago
13

Approximately how long does it take a sample of francium-223 to decay by 50%?

Mathematics
1 answer:
valentina_108 [34]3 years ago
6 0
B. 100 minutes correct me if i’m wrong
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Player A scored -2. player B scored +4. what was the difference?
Usimov [2.4K]

Answer:

the answer should be 6

Step-by-step explanation:

I hope this helps

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Add or subtract mentally 16.9+ 12.1
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When you add it mentally you'd get 29
When you subtract it mentally you'd get 4.8
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A family of 2 adults and 3 children went out to dinner. The total bill was $42. Each child's dinner cost $4. How much did each a
Yanka [14]

Answer: Each adult’s meal costed $15

Step-by-step explanation:

This situation can be modeled by the following equation:

2a + 3c = 42, where a = the cost of an adult’s meal, and c = the cost of a child’s meal


Since we know from the problem that a child’s meal costs $4, we know c:

2a + 3(4) = 42


At this point, we can just solve the resulting equation for a:

2a + 3(4) = 42

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So, the cost of each adult’s meal was $15.


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2 years ago
A positive number multiplied or divided by a negative number is always<br> negative or positive
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3 years ago
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Will literally make BRAINLIEST and marry you if you do this for me
Tanya [424]

Answer:

0.44

Step-by-step explanation:

See the picture below.

Remember that the sine is the ratio of the length of the opposite leg to the length of the hypotenuse.

Perhaps you know SOHCAHTOA, where SOH means sine, opposite, hypotenuse.

For angle J, leg LK is the opposite leg.

The hypotenuse of the triangle is the side opposite the right angle, teh angle of 90°, which is angle L, so the hypotenuse is side KJ.

\sin J = \dfrac{opposite~leg}{hypotenuse}

\sin J = \dfrac{39}{89}

\sin J = 0.43820...

Answer: 0.44

6 0
3 years ago
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