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denis23 [38]
3 years ago
7

A radioactive substance has a decay rate of 2.3% per year. What is its half life? Give your answer correct to 2 decimal places.

Mathematics
1 answer:
tatiyna3 years ago
8 0
Please send a message me a picture of the problem and I think it is .023
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Which number will make the two fractions equivalent 42/50 84/?
Alenkinab [10]

Answer:

Step-by-step explanation:

84 is twice 42

Multiply the numerator and the denominator of 42/50 by 2:

42/50 = (42×2)/(50×2) = 84/100

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Find the missing length. Round to the nearest tenth. <br> HELP PLEASE!!
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Use the Pythagorean theorem

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When lines intersect in one place, what are they called?
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For an angle θ, tan(θ) is a negative number. Which quadrants might θ be in?
Klio2033 [76]

So for this question, we're asked to find the quadrant in which the angle of data lies and were given to conditions were given. Sign of data is less than zero, and we're given that tangent of data is also less than zero. Now I have an acronym to remember which Trig functions air positive in each quadrant. . And in the first quadrant we have that all the trig functions are positive. In the second quadrant, we have that sign and co seeking are positive. And the third quadrant we have tangent and co tangent are positive. And in the final quadrant, Fourth Quadrant we have co sign and seeking are positive. So our first condition says the sign of data is less than zero. Of course, that means it's negative, so it cannot be quadrant one or quadrant two. It can't be those because here in Quadrant one, we have that all the trick functions air positive and the second quadrant we have that sign. If data is a positive, so we're between Squadron three and quadrant four now. The second condition says the tangent of data is also less than zero now in Quadrant three. We have that tangent of data is positive, so it cannot be quadrant three, so our r final answer is quadrant four, where co sign and seek in are positive.  

4 0
2 years ago
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Need to round 402 to nearest ten and hundred
antoniya [11.8K]
The 0 in the number 402 is in the ten place. The number after it is 2. 2 is less than 5.

402 rounded to the nearest ten is 400

The 4 in the number 402 is in the hundreds place. The number after it is 0. 0 is less than 5.

402 rounded to the nearest hundred is 400
6 0
3 years ago
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