What is the product of 2 1/8 and 4 1/3? A. 6 2/11 B. 8 1/24 C. 8 2/11 D. 9 5/24

2 answers:

6 0

Your answer should be D.

This is because first you must make them improper fractions. The equation should look like this, 13/3•17/8=? So to solve this you multiply the numerators and denominators. That should give you 221/24. Lastly you must change the improper fraction into a mixed number, and that would give you 9 5/24 as your final answer.

Viefleur [7K]3 years ago

4 0

Hey there :,)
The answer is D. 9 5/24

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Answer:

$n=\frac{0.5(1-0.5)}{(\frac{0.03}{1.96})^2}=1067.11$

And rounded up we have that n=1068

Step-by-step explanation:

For this case we have the following info given:

$ME=0.03$ the margin of error desired

$Conf= 0.95$ the level of confidence given

The margin of error for the proportion interval is given by this formula:

$ME=z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}$ (a)

the critical value for 95% of confidence is $z=1.96$

We can use as estimator for the population of interest $\hat p=0.5$ . And on this case we have that $ME =\pm 0.03$ and we are interested in order to find the value of n, if we solve n from equation (a) we got: