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3 years ago

Need help with #8 and #10. Math. Rates.

Mathematics

1 answer:

Rzqust [24]3 years ago

3 0

1.99/32=0.06 an oz
3.69/64=0.05 an oz
5.85/96=0.06 an oz
therefore it is 64 oz

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3 years ago

Samira ran 3 more miles than twice the number of miles Ada ran. Which statement makes this comparison using the correct variable

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For a normal distribution with μ=500 and σ=100, what is the minimum score necessary to be in the top 60% of the distribution?

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475.

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We have been given that for a normal distribution with μ=500 and σ=100. We are asked to find the minimum score that is necessary to be in the top 60% of the distribution.

We will use z-score formula and normal distribution table to solve our given problem.

$z=\frac{x-\mu}{\sigma}$

Top 60% means greater than 40%.

Let us find z-score corresponding to normal score to 40% or 0.40.

Using normal distribution table, we got a z-score of $-0.25$ .

Upon substituting our given values in z-score formula, we will get:

$-0.25=\frac{x-500}{100}$

$-0.25*100=\frac{x-500}{100}*100$

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Therefore, the minimum score necessary to be in the top 60% of the distribution is 475.

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3 years ago