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natali 33 [55]
2 years ago
5

Find SR. Help to tell me if I am correct or wrong.

Mathematics
1 answer:
BlackZzzverrR [31]2 years ago
8 0

Answer:

7

Step-by-step explanation:

R is mid point of IJ and S is midpoint of KJ.

So RS is half of IK.

2x-5=1/2(x+8)

4x-10=x+8

4x-x=8+10

3x=18

x=18/3=6

SR=2x-5=2(6)-5=12-5=7

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The half life of silicone-32 is 710 years. If 30 grams is present now, how much will be present in 300 years?
Irina18 [472]

Answer:

22.38 g of silicone-32 will be present in 300 years.

Step-by-step explanation:

A radioactive half-life refers to the amount of time it takes for half of the original isotope to decay and its given by

                                           N(t)=N_0(\frac{1}{2})^{\frac{t}{t_{1/2}}

where,

N(t) = quantity of the substance remaining

N_0 = initial quantity of the substance

t = time elapsed

t_{1/2} = half life of the substance

From the information given we know:

  • The initial quantity of silicone-32 is 30 g.
  • The time elapsed is 300 years.
  • The half life of silicone-32 is 710 years.

So, to find the quantity of silicone-32 remaining we apply the above equation

N(t)=30\left(\frac{1}{2}\right)^{\frac{300}{710}}=30\left(\frac{1}{2}\right)^{\frac{30}{71}}\approx22.38 \:g

22.38 g of silicone-32 will be present in 300 years.

7 0
3 years ago
The sum of a two digit number is 8. If the digits are reversed, the number is increased by 54. What is the number.
Mashutka [201]

Answer: idk

Step-by-step explanation:

idk

8 0
3 years ago
What is the value of m in the figure below? In this diagram, ΔABD ~ ΔBCD.
Kryger [21]

Answer:

<h2>√126</h2>

Option D is the right option.

solution,

\frac{ac}{bc}  =  \frac{bc}{dc}  \\ or \:  \frac{18}{ m}  =  \frac{m}{7}  \\ or \: m \times \: m = 18 \times 7(cross \: multiplication) \\ or \:  {m}^{2}  = 126 \\ m =  \sqrt{126}

Hope this helps..

Good luck on your assignment.

Hope

6 0
3 years ago
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