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4 years ago

How do you divide decimals

Mathematics

1 answer:

velikii [3]4 years ago

7 0

Answer:

Step-by-step explanation:If the number you're dividing by has a decimal, move the decimal point all the way to the right counting the number of places you've moved it to. ...

Insert a decimal point in the quotient (answer) space, exactly above the decimal point in the number under the division bar.

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Multiply. Express your answer in lowest terms. -3/8*(-2/9)=

liubo4ka [24]

Multiply the numerators
-3 x -2 = 6

Multiply the denominators
8 x 9 = 72

Fraction is then 6/72, which reduces to 1/12.

3 0

3 years ago

The manager of the quality department for a tire manufacturing company wants to study the average tensile strength of rubber use

Alika [10]

Answer:

$p_v =P(z>z_{calc})=0.067$

Conclusion

If we compare the p value and the significance level given $\alpha=0.1$ we see that $p_v$ so we can conclude that we have enough evidence to reject the null hypothesis at 10% of significance.

So then the answer would be

a. true

Step-by-step explanation:

Data given and notation

$\bar X$ represent the sample mean

$\sigma$ represent the population standard deviation

$n$ sample size

$\mu_o =800$ represent the value that we want to test

$\alpha=0.1$ represent the significance level for the hypothesis test.

z would represent the statistic (variable of interest)

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

State the null and alternative hypotheses.

We need to conduct a hypothesis in order to check if the mean is less or equal than 800 for the null hypothesis:

Null hypothesis: $\mu \leq 800$

Alternative hypothesis: $\mu > 800$

The z statistic is given by:

$z=\frac{\bar X-\mu_o}{\frac{\sigma}{\sqrt{n}}}$ (1)

z-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".

Calculate the statistic

We can replace in formula (1) and we assume that she got a calculated value $z_{calc}$

P-value

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

$p_v =P(z>z_{calc})=0.067$

Conclusion

If we compare the p value and the significance level given $\alpha=0.1$ we see that $p_v$ so we can conclude that we have enough evidence to reject the null hypothesis at 10% of significance.

So then the answer would be

a. true

3 0

4 years ago

U 1995, 70% of all children in the U.S. were living with both parents. If 25 children were selected at random in the U.S., what

nikdorinn [45]

Answer:

The probability that at most 10 of them will be living with both of their parents is 0.0018

Solution:

Given, US 1995, 70% of all children in the U.S. were living with both parents. 25 children were selected at random in the U.S.,

We have to find what is the probability that at most 10 of them will be living with both of their parents?

Now, number of children picked (n) = 25.

Probability to be with parents = 70% = 0.7.

Our condition is 0 ≤ x ≤ 10.

Then, we have to calculate p(0 ≤ x ≤ 10).

We can calculate using binomial cumulative distribution frequency- binomial CDF

Now, p(0 ≤ x ≤ 10) = binomcdf(n, p, x) = binomcdf(25, 0.7, 10) = 0.00177840 ≈ 0.0018.

Hence, the probability is 0.0018

6 0

3 years ago

Explain why there are two sine ratios, two cosine ratios, and two tangent ratios for any right triangle

taurus [48]

Each angle has a sin, cos, and tan associated with it.
in a right angled triangle there are two other angles which each have ratios.

5 0

3 years ago

Read 2 more answers

Y=x2-10x+16 in axis of symmetry

RUDIKE [14]

I dont know i will tell you when i find out

5 0

3 years ago