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nata0808 [166]
3 years ago
5

Please can someone help me find X using sin cos and tan​

Mathematics
2 answers:
olga_2 [115]3 years ago
3 0

\sin30^\circ=\dfrac x{25}

\implies x=25\sin30^\circ=\dfrac{25}2

RSB [31]3 years ago
3 0

Answer:

12.5.

Step-by-step explanation:

sin 30 = opposite / hypotenuse:

sin 30 = x / 25

x = 25  sin 30

= 1/2 * 25

= 12.5.

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A sample of radium has a weight of 1.5 mg and a half-life of approximately 6 years.
pogonyaev

Answer:

0.75 mg

Step-by-step explanation:

From the question given above the following data were obtained:

Original amount (N₀) = 1.5 mg

Half-life (t₁/₂) = 6 years

Time (t) = 6 years

Amount remaining (N) =.?

Next, we shall determine the number of half-lives that has elapse. This can be obtained as follow:

Half-life (t₁/₂) = 6 years

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Number of half-lives (n) =?

n = t / t₁/₂

n = 6/6

n = 1

Finally, we shall determine the amount of the sample remaining after 6 years (i.e 1 half-life) as follow:

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Number of half-lives (n) = 1

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N = 1/2ⁿ × N₀

N = 1/2¹ × 1.5

N = 1/2 × 1.5

N = 0.5 × 1.5

N = 0.75 mg

Thus, 0.75 mg of the sample is remaining.

5 0
2 years ago
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Answer:

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<em><u>I </u></em><em><u>hope </u></em><em><u>it </u></em><em><u>helps</u></em>

<em><u>have </u></em><em><u>a </u></em><em><u>great </u></em><em><u>day </u></em>

<em><u>#Liliflim✌️</u></em>

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