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Zigmanuir [339]
3 years ago
8

Is 0.333 a natural number?

Mathematics
2 answers:
bonufazy [111]3 years ago
6 0
No i don’t think so
NeX [460]3 years ago
3 0

Answer:

No, 0.333 is a rational number, not a natural number

Step-by-step explanation:

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If we substitute in the known values 16^2 + y^2 = 20^2 and solve for y we get that y = sqrt(20^2 - 16^2), this then simplifies to y = 12

Finding x is much more annoying, the easiest way I can immediately see is to find the upper angles by doing sin(16/20) and then 90 - sin(16/20) since the complementary angle is the one you want. I don't have a calculator or a trig table with me right now but I will tell you that x will be equal to 12 ÷ the inverse cosine of the angle (90degrees - sin(16/20)).

I am pretty sure the answer is D though because we know for sure y = 12 and x has to be greater than y because the hypotenuse must be larger than both legs. It could be E but you won't know unless you do the math for x. So it is either D or E but I would be surprised if a Professor made you do all of the work just to say it doesn't work...
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3 years ago
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b) Of the total of 90 people, 62 are male or study biology (or both). The probability that any person is in that category is ...

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