Estimate 0.00002836 then find the scientific notation

Please help I don't know what I'm doing I've literally tried everything please help

Illusion [34]

Answer:

1. -2/3

2. 5/4

3. -5/3

4. -6/5

Step-by-step explanation:

Use the slope formula for 2 points of each graph to get the answer.

Or you can just count the rise over run.

8 0

3 years ago

NEED THE ANSWER ASAP

Kisachek [45]

Answer:

c = 7 $\sqrt{3}$

Step-by-step explanation:

Using the sine ratio in the left right triangle and the exact value

sin45° = $\frac{\sqrt{2} }{2}$ , then

sin45° = $\frac{opposite}{hypotenuse}$ = $\frac{a}{7\sqrt{2} }$ = $\frac{\sqrt{2} }{2}$ ( cross- multiply )

2a = 14 ( divide both sides by 2 )

a = 7

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Using the tangent ratio in the right triangle and the exact value

tan30° = $\frac{1}{\sqrt{3} }$ , then

tan30° = $\frac{opposite}{adjacent}$ = $\frac{a}{c}$ = $\frac{7}{c}$ = $\frac{1}{\sqrt{3} }$ ( cross- multiply )

c = 7 $\sqrt{3}$

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4 0

4 years ago

A bucket holds 243.5 oz of water. The bucket loses 0.6 oz of water per second.In how many seconds will the bucket be 40% full

miskamm [114]

243.5 * .6 =
146.1 oz

146.1 oz/.6=

243.5 seconds

4 0

3 years ago

To rent a midsize car for one day, Tom's Car Rentals charges a fee of $0.25 per mile driven. Write an equation that relates the

mafiozo [28]

Answer:

Step-by-step explanation:

the anser is 25 because i dont know i jus answer for points

5 0

4 years ago

A survey was conducted among people who visit swimming pools. 209 people were asked about the preferences in water sanitizing. 1

lukranit [14]

Answer:

The claim that needs to be tested is that the proportion of people who prefer mechanical methods of water sanitizing truly exceeds the proportion of people who have no sanitizing methods preferences. This can be expressed as the population proportion of people who prefer mechanical methods of water sanitizing is significantly higher than 0.5.

This is a hypothesis test for a population proportion.

The test will have null and alternative hypothesis:

$H_0: \pi=0.5\\\\H_a:\pi>0.5$

Test statistic z = 0.972

P-value = 0.166

At a significance level of 0.05, there is not enough evidence to support the claim that the proportion of people who prefer mechanical methods of water sanitizing truly exceeds the proportion of people who have no sanitizing methods preferences.

Step-by-step explanation:

We have to construct a hypothesis test for the population proportion. We need to test the claim that the proportion of people who prefer mechanical methods of water sanitizing truly exceeds the proportion of people who have no sanitizing methods preferences.

As the survey is done as a yes/no question, the null hypothesis would state that the amount of people who prefer mechanical methods of water sanitizing is not significantly different from the proportion of people who have no sanitizing methods preferences. That can be expressed as the population proportion equals 0.5, so both proportions are equal.

The alternative hypothesis would state that the proportion of people who prefer mechanical methods of water sanitizing truly exceeds the proportion of people who have no sanitizing methods preferences. This could be expressed as the population proportion significantly bigger than 0.5.

Then, the null and alternative hypothesis are written:

$H_0: \pi=0.5\\\\H_a:\pi>0.5$

The significance level is assumed to be 0.05.

The sample has a size n=209.

The sample proportion is p=0.536.

$p=X/n=112/209=0.536$

The standard error of the proportion is:

$\sigma_p=\sqrt{\dfrac{\pi(1-\pi)}{n}}=\sqrt{\dfrac{0.5*0.5}{209}}\\\\\\ \sigma_p=\sqrt{0.001196}=0.035$

Then, we can calculate the z-statistic as:

$z=\dfrac{p-\pi-0.5/n}{\sigma_p}=\dfrac{0.536-0.5-0.5/209}{0.035}=\dfrac{0.034}{0.035}=0.972$

This test is a right-tailed test, so the P-value for this test is calculated as:

$\text{P-value}=P(z>0.972)=0.166$

As the P-value (0.166) is greater than the significance level (0.05), the effect is not significant.

The null hypothesis failed to be rejected.

There is not enough evidence to support the claim that the proportion of people who prefer mechanical methods of water sanitizing truly exceeds the proportion of people who have no sanitizing methods preferences.

3 0

3 years ago