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3 years ago

Pls help me with this answer

Mathematics

2 answers:

Misha Larkins [42]3 years ago

6 0

student 3 i thin srry if im wrong

olya-2409 [2.1K]3 years ago

5 0

Answer:

student 3

Step-by-step explanation:

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Write an exponential growth function. Explain why your function represents exponential growth.

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2 years ago

Triangle ABC maps to triangle A′B′C′ by a 90∘ rotation counterclockwise about the origin.

Tresset [83]

The answer is 90 units hope this helps

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3 years ago

When 4(0.5x+2.5y-0.7x-1.3y+4) is simplified, what is the resulting expression?

padilas [110]

Answer:

-0.8x + 4.8y + 16

Step-by-step explanation:

4(0.5x+2.5y-0.7x-1.3y+4) = 4( 0.5x - 0.7x + 2.5y - 1.3y + 4)

= 4( -0.2x + 1.2y + 4)

= 4*(-0.2x) + 4 *1.2y + 4*4

= -0.8x + 4.8y + 16

8 0

3 years ago

Read 2 more answers

Assume you have such a watch. if a minimum of 18.0% of the original tritium is needed to read the dial in dark places, for how m

laila [671]

Given that the half life of 3H is 12.3 years.

The amount of substance left of a radioactive substance with half life of $t_{ \frac{1}{2} }$ after t years is given by

$N(t)=N_0\left(\frac{1}{2} \right)^{ \frac{t}{t_{\frac{1}{2}} }$

Therefore, the number of years it will take for 18% of the original tritinum to remain is given by

$18 \% = 100 \% \left(\frac{1}{2} \right)^{ \frac{t}{12.3}} \\ \\ \Rightarrow\left(\frac{1}{2} \right)^{ \frac{t}{12.3}} =0.18 \\ \\ \Rightarrow\frac{t}{12.3}\ln\left(\frac{1}{2} \right)=\ln0.18 \\ \\ \Rightarrow\frac{t}{12.3}= \frac{\ln0.18}{\ln\left(\frac{1}{2} \right)} = \frac{-1.715}{-0.6931} =2.474\\ \\ \Rightarrow t=2.474(12.3)=30.4$

Therefore, the number of <span>years that the time could be read at night is 30.4 years.</span>

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3 years ago

What is the square root of 21

Andru [333]

Answer:

4.58

Step-by-step explanation:

21 is not a perfect square, but lies between the perfect squares 16 and 25. Thus, √21 lies between √16 and √25, that is, between 4 and 5. Since 21 is closer to 25 than to 16, √21 is closer to 5 than to 4. A rough estimate of √21 would be 4.7.

√21 done on a calculator comes out to 4.58.

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3 years ago