A 25

Mathematics

1 answer:

Iteru [2.4K]3 years ago

7 0

Answer:

The length of one part is 8 feet and the longer part is 17 feet.

Step-by-step explanation:

While the longer part is 1 foot more than twice the shorter part which means that l2=2x+1 l 2 = 2 x + 1

hope this helps

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Or a very large set of data the measured mean is found to be 288.6 with a standard deviation of 21.2. assuming the data to be no

SashulF [63]

The 68-95-99.7 rule tells us 68% of the probability is between -1 standard deviation and +1 standard deviation from the mean. So we expect 75% corresponds to slightly more than 1 standard deviation.

Usually the unit normal tables don't report the area between -σ and σ but instead a cumulative probability, the area between -∞ and σ. 75% corresponds to 37.5% in each half so a cumulative probability of 50%+37.5%=87.5%. We look that up in the normal table and get σ=1.15.

So we expect 75% of normally distributed data to fall within μ-1.15σ and μ+1.15σ

That's 288.6 - 1.15(21.2) to 288.6 + 1.15(21.2)

Answer: 264.22 to 312.98

8 0

3 years ago

Please answer this correctly

RUDIKE [14]

Answer:

$11\dfrac{3}{8}\text{cm}$