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2 years ago

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The wild tiger population decreased by 97% over 20 years. There is 3200 tigers left. To the nearest thousand, how many tigers we

re there 20 years ago? This is a question from Mathswatch by the way.

1 answer:

siniylev [52]2 years ago

7 0

Answer: 64,000

Step-by-step explanation:

3500 is the 5% left, so 1% is 640640 times 100% = 64,000 which is already to the nearest thousand

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Which function represents the exponential function f(x) = 3x after a vertical stretch by a factor of 8 and a reflection across t

irina1246 [14]

Answer:

g(x)=-8(3^x)

Step-by-step explanation:

Given: f(x)=3^x

Multiply by 8: f(x)=8(3^x)

Negate function: g(x)=-8(3^x)

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2 years ago

Relationship in Figures

lubasha [3.4K]

Answer:

B. 1,1,2,3,5,8,13,21

Step-by-step explanation:

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2 years ago

xP(x)00.2510.0520.1530.55Find the standard deviation of this probability distribution. Give your answer to at least 2 decimal pl

Nookie1986 [14]

The Solution:

Given:

Required:

Find the standard deviation of the probability distribution.

Step 1:

Find the expected value of the probability distribution.

$E(x)=\mu=\sum_{i\mathop{=}0}^3x_iP_(x_i)$ $\begin{gathered} \mu=(0\times0.25)+(1\times0.05)+(2\times0.15)+(3\times0.55) \\ \\ \mu=0+0.05+0.30+1.65=2.0 \end{gathered}$

Step 2:

Find the standard deviation.

$Standard\text{ Deviation}=\sqrt{\sum_{i\mathop{=}0}^3(x_i-\mu)^2P_(x_i)}$ $=(0-2)^2(0.25)+(1-2)^2(0.05)+(2-2)^2(0.15)+(3-2)^2(0.55)$ $=4(0.25)+1(0.05)+0(0.15)+1(0.55)$ $=1+0.05+0+0.55=1.60$

Thus, the standard deviation is 1.60

Answer:

1.60

8 0

1 year ago

Ahat [919]

The correct answer is (C). The sample is a subset of the population, and the parameter is a characteristic of the population of interest.

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2 years ago

Determine the intercepts of the line.<br> x-intercept:( , ) <br> y-intercept:( , )

Nastasia [14]

Answer:

x-intercept: (-7,0)

y-intercept: (0,2)

Step-by-step explanation:

The x-intercept is (-7,0) because on the graph we can see that the line lies on the x-axis on the point (-7,0).

The y-intercept is (0,2) because we can see that the line pass through the y-axis on the (0,2) point.

Hope this helps you :)

7 0

2 years ago

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