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3 years ago

What is 1.9 as a fraction?

Mathematics

1 answer:

Semmy [17]3 years ago

8 0

1 9/10 because 1 whole is equal to one and 0.9 is equal to 9/10. Try reading it out to your self.

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Decrease 10kg by 10%

34kurt

Answer:

if you decrease 10 kg by 10% you get 9 kg

5 0

2 years ago

Read 2 more answers

Ten years ago 53% of American families owned stocks or stock funds. Sample data collected by the Investment Company Institute in

stiks02 [169]

Answer:

a) The null and alternative hypothesis are:

$H_0: \pi=0.53\\\\H_a:\pi$

b) If 300 families were sampled, for a significance level of 5%, there is enough evidence to support the claim that a smaller proportion of American families own stocks or stock funds this year than 10 years ago (P-value = 0.001).

Step-by-step explanation:

The claim that we want to have evidence to support is that a smaller proportion of American families own stocks or stock funds this year than 10 years ago.

The hypothesis for this test should state:

- For the null hypothesis, that the population proportion is not significantly different from 53%.

$H_0:\pi=0.53$

- For the alternative hypothesis, that the population proportion is significantly less than 53%.

$H_a: \pi$

If 300 families are sampled, we can perform a hypothesis test for a proportion.

The claim is that a smaller proportion of American families own stocks or stock funds this year than 10 years ago.

Then, the null and alternative hypothesis are:

$H_0: \pi=0.53\\\\H_a:\pi$

The significance level is 0.05.

The sample has a size n=300.

The sample proportion is p=0.44.

The standard error of the proportion is:

$\sigma_p=\sqrt{\dfrac{\pi(1-\pi)}{n}}=\sqrt{\dfrac{0.53*0.47}{300}}\\\\\\ \sigma_p=\sqrt{0.00083}=0.029$

Then, we can calculate the z-statistic as:

$z=\dfrac{p-\pi+0.5/n}{\sigma_p}=\dfrac{0.44-0.53+0.5/300}{0.029}=\dfrac{-0.088}{0.029}=-3.065$

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

$\text{P-value}=P(z$

As the P-value (0.001) is smaller than the significance level (0.05), the effect is significant.

The null hypothesis is rejected.

There is enough evidence to support the claim that a smaller proportion of American families own stocks or stock funds this year than 10 years ago.

3 0

3 years ago

If f(x)= 3x-8, and f(x)=-17, find x.

Anni [7]

Answer:

f(x)= 3x-8,

f(x)=-17

-17 = 3x -8

3x= -17+8

3x = -9

x =-3

Step-by-step explanation:

3 0

2 years ago

Help please ASAP!!

Fittoniya [83]

Answer:

$\displaystyle 702$

Step-by-step explanation:

we are given a exponential function

$\displaystyle f(x) = {3}^{x + 1} - 22$

where x represents the number and f(x) represents the amount

we are also given that when x is 3 then f(x) is 59 likewise when x is 6 then f(x) is 2165

to figure out the average rate of change between 3 and 6 we can consider the average rate of change formula given by

$\displaystyle m = \frac{ f(x)_ {2} - f(x)_{1} }{ x_{2} - x_{1} }$

substitute what we have:

$\displaystyle m = \frac{ 2165 - 59 }{6 - 3 }$

simplify substitution:

$\displaystyle m = \frac{2106 }{3 }$

simplify division:

$\displaystyle m = 702$

hence, the average rate of change between 3 and 6 is 702

6 0

2 years ago

Read 2 more answers

"According to contractarian logic, we should be willing to make concessions to others if they agree to make comparable and recip

natali 33 [55]

Answer:In a couple with a newborn baby at home, to take turns on feeding the baby at night.

Step-by-step explanation: Here both parents are willing to sacrifice a few minutes, if not hours of sleeptime with the promise to be allowed to rest the next time the baby needs to be fed. There is no certainty in how long it will take for the baby to go back to sleep or how long it will be for the baby to be awake again, but the chances are the same for both parents, so they both agree to take care of the child one at a time with the promise to be in turns, this is an example of contractarian logic.

7 0

2 years ago