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4 years ago

Hello please someone help me with this question....

Mathematics

1 answer:

Damm [24]4 years ago

3 0

F(n) = 2.2 x f(n-1)

This means, a term of this sequence is obtained by multiplying the previous term by 2.2

We are given the first term, f(1) = 10

So,
f(2) = 2.2 x f(2-1) = 2.2 x f(1) = 2.2 x 10 = 22
Likewise,
f(3) = 2.2 x f(2) = 48.4
f(4) = 2.2 x f(3) = 106.48
f(5) = 2.2 x f(4) = 234.256

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A ball is launched into the air from a height of 12 feet at time t = 0. The function that models this situation is h(t) = -2t2 +

marshall27 [118]

Answer:

Step-by-step explanation:

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4 years ago

Read 2 more answers

The graph of which of the following equation has x-intercept of 3 and 0 ?

Hatshy [7]

Answer:

From the given graph , The equation y = x² - 3 x has x-intercept of 3 , 0

Step-by-step explanation:

Given as :

Let The standard equation of line

y = m x + c

where m is the slope of line and c is y-intercept

For, x-intercept , put y = 0

For y-intercept , put x = 0

A) y = x + 3

for x-intercept , y = 0

So, 0 = x + 3

i.e x = - 3

B) y = x² + 3 x

for x-intercept , y = 0

So, 0 = x² + 3 x

i.e 0 = x² + 3 x

Or, x ( x + 3) = 0

Or, x = 0 , x = - 3

C) y = x² - 3 x

for x-intercept , y = 0

So, 0 = x² - 3 x

i.e 0 = x² - 3 x

Or, x ( x - 3) = 0

Or, x = 0 , x = 3

D) x = y² - 3 y

for x-intercept , y = 0

So, x = 0 - 0

i.e x = 0

Hence, From the given graph , The equation y = x² - 3 x has x-intercept of 3 , 0 Answer

8 0

3 years ago

Which of the following is the equation of the line that is parallel to y=35x+8 y = 3 5 x + 8 and goes through point (-10,4)?

xeze [42]

Slope-intercept form of a line is y=mx+b.

Where m= slope and b= y-intercept.

First step is to compare the given equation y=35x+8 with the above equation to get the value of m.

After comparing the two equations we will get m=35.

Slope of paralle lines always equal which means slope of a line which is parallel to the above line will also be 35.

Now the line is passing through (-10,4).

Point slope form of a line is :

$y-y_{1} =m(x-x_{1} )$

Next step is to plug in m=35, x1=-10 and y1=4 in the above equation. So,

y-4=35(x-(-10)

y-4=35(x+10)

y-4=35x+350

y=35x+350+4

y=35x+354.

So, the equation of the line is y=35x+354.

4 0

4 years ago

X and Y are two categorical (uncoded) variables. Can we calculate a correlation coefficient for them:

Lisa [10]

Answer:(c). No. Both variables must be quantativite

Step-by-step explanation:

Both variables must be quantitative because we can calculate Pearson correlation if they are both quantitative

3 0

3 years ago

Decide whether the normal sampling distribution can be used. If it can be used, test the claim about the population proportion

soldi70 [24.7K]

Answer:

$np=25*0.11=2.75 < 10$

$n(1-p)=25*(1-0.11)=22.25 > 10$

Th second condition is satisfied but the first one on this case it's not satisfied. So for this case it's not good apply the normal approximation to the distribution of p.

Step-by-step explanation:

We need to check the conditions in order to use the normal approximation.

$np=25*0.11=2.75 < 10$

$n(1-p)=25*(1-0.11)=22.25 > 10$

Th second condition is satisfied but the first one on this case it's not satisfied. So for this case it's not good apply the normal approximation to the distribution of p.

If we have both conditions satisfied the general procedure is the following:

Data given and notation

n=23 represent the random sample taken

$\hat p=0.08$ estimated proportion

$p_o=0.11$ is the value that we want to test

$\alpha=0.1$ represent the significance level

Confidence=90% or 0.90

z would represent the statistic (variable of interest)

$p_v$ represent the p value (variable of interest)

Concepts and formulas to use

We need to conduct a hypothesis in order to test the claim that the true proportion is less than 0.11.:

Null hypothesis: $p \geq 0.11$

Alternative hypothesis: $p < 0.11$

When we conduct a proportion test we need to use the z statistic, and the is given by:

$z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}}$ (1)

The One-Sample Proportion Test is used to assess whether a population proportion $\hat p$ is significantly different from a hypothesized value $p_o$ .

Calculate the statistic

On this case since the normal approximation it's not satisfid it's not correct calculate the statistic.

Statistical decision

It's important to refresh the p value method or p value approach . "This method is about determining "likely" or "unlikely" by determining the probability assuming the null hypothesis were true of observing a more extreme test statistic in the direction of the alternative hypothesis than the one observed". Or in other words is just a method to have an statistical decision to fail to reject or reject the null hypothesis.

The significance level provided $\alpha=0.1$ . The next step would be calculate the p value for this test.

Since is a left tailed test the p value would be:

$p_v =P(z$

And if the $p_v$ we reject the null hypothesis. Otherwise w fail to the reject the null hypothesis.

5 0

3 years ago