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3 years ago

1. Mr. Maxwell can write 8 1\5 paragraphs of his novel in an hour. Mr. Maxwell wrote 32 4\5 paragraphs today.

1 answer:

3 0

A) (32 4/5) / ( 8 1/5) = how many hours Mr. Maxwell wrote

B)
(32 4/5 ) / (8 1/5) = 4 hours

converting mixed numbers to fractions, the initial equation becomes,164 / 5 ÷ 41 / 51
Applying the fractions formula for division,=164×5 / 5×41

=820/205

Simplifying 820/205, the answer is=4

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For an intramural sports program at a particular college, the time to run one mile is recorded for 200 male students in the prog

Greeley [361]

Answer:

Devon has the lower z-score, so he ran the mile faster relative to his gender.

Step-by-step explanation:

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

Who ran the mile faster relative to their gender?

The lower the percentile of time ran, the faster. So whoever has the lower z-score ran the mile faster.

Devon

His best time to run the mile is 6.6 minutes.

These times are approximately normal with mean 8 minutes and standard deviation 1 minute.

We have to find Z when $X = 6.6, \mu = 8, \sigma = 1$ . So

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{6.6 - 8}{1}$

$Z = -1.4$

Kendall

Her best time to run the mile is 5.7 minutes.

These times are approximately normal with mean 7.5 minutes and standard deviation 2 minutes.

We have to find Z when $X = 5.7, \mu = 7.5, \sigma = 2$ . So

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{5.7 - 7.5}{2}$

$Z = -0.9$

Devon has the lower z-score, so he ran the mile faster relative to his gender.

3 0

3 years ago

25% equivalent to 1/4%

Effectus [21]

Those are equivalent take 100 times 1/4 it’s the same as dividing 4 :)

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3 years ago

Brent's neighborhood is putting down new mulch at the playground and he is in Charge of buying the mulch. One bag covers 3 yd.².

Yakvenalex [24]

Answer:

I don't know but 4 could be it

Step-by-step explanation:

7 0

3 years ago

The Super Shop and Save store had 120 gallons of milk placed on the shelf one night. During the next morning's inspection, the m

Sergeeva-Olga [200]

18 gallons of milk had passed the expiration date.

Explanation step by step

Multiply 120x 15%
Turn 15% into a decimal which is 0.15 so now it’s 120x0.15 which equals to 18.

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3 years ago

What's the quadratic equation?

erma4kov [3.2K]

The standard form of the quadratic equation is ax^2 + bx + c. In vertex form, it's y = a(x – h)2 + k.
The graph of a quadratic equation is a parabola, which looks like a u. If a is negative then it's an upside down u.

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3 years ago

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