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Art [367]
3 years ago
6

If it takes eight men ten hours to build a wall, how long would it take four men?

Mathematics
2 answers:
zmey [24]3 years ago
8 0

Answer:

ha ha is it math question seriously or riddle if riddle the wall is already built by men they non time is taken by men.

Darya [45]3 years ago
4 0

Answer:

20 bc if 8 men took 10 hours then 4 men would take double the time

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7(xy) equivalent expression
mariarad [96]

Answer:

Espero te sirva

Step-by-step explanation:

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6 0
2 years ago
you are buying a new shirt at the mall. It has a price of $59.99. you have a coupon for 20% off. In new jersey the sales tax is
Musya8 [376]
59.99
× .20= 11.99 round up to 12.00

59.99
-12.00=
47.99

47.99
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47.99
+3.96=
Total: $51.95
4 0
3 years ago
<img src="https://tex.z-dn.net/?f=%5Csqrt%7B4x%2B1%7D-5%3D0%5C%5C%5C%5C%5C%5C%5C%5C%5Csqrt%7B5x-1%7D%2B3%3Dx%5C%5C" id="TexFormu
adoni [48]

Answer:

what topic is this please

8 0
3 years ago
My Notes A large manufacturing plant uses lightbulbs with lifetimes that are normally distributed with a mean of 1600 hours and
Evgen [1.6K]

Answer:

The bulbs should be replaced each 1436.9 hours.

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

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.

In this problem, we have that:

\mu = 1600, \sigma = 70

How often should the bulbs be replaced so that no more than 1% burn out between replacement periods?

This is the first percentile of hours. So it is X when Z has a pvalue of 0.01.

So it is X when Z = -2.33.

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

-2.33 = \frac{X - 1600}{70}

X - 1600 = -2.33*70

X = 1436.9

The bulbs should be replaced each 1436.9 hours.

6 0
3 years ago
Can someone please explain what solving in scientific notation is?
nikitadnepr [17]

Step-by-step explanation:

Scientific notation is a way of expressing numbers that are too big or too small to be conveniently written in decimal form.

For example, instead of writing 0.0000000056, we write 5.6 x, 10^-9

5 0
3 years ago
Read 2 more answers
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