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2 years ago

The radius of a round tablecloth is 2.75 feet, how many yards is needed

Mathematics

2 answers:

tatiyna2 years ago

7 0

Answer:

5.23 yards

Step-by-step explanation:

The circumference of a circle is equal to

$C=2\pi r$

we have

$r=2.5 ft$

substitute the value

$C=2\pi r(2.5)=5\pi ft$

assume

$\pi =3.14$

$5\pi =5*3.14=15.7 ft$

convert feet to yards to get your answer:

<em>5.23 yards</em>

kogti [31]2 years ago

5 0

Answer:

Step-by-step explanation:

$A=\pi r^2\\ \\ A=\pi(2.75ft(yd/3ft))^2\\ \\ A\approx 2.64 yd^2$

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Read 2 more answers

The mean yearly rainfall in Sydney, Australia, is about 134 mm and the standard deviation is about 66 mm ("Annual maximums of,"

svetlana [45]

Answer:

At least 202.44 mm in the top 15%.

Step-by-step explanation:

When the distribution is normal, we use 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 question, we have that:

$\mu = 134, \sigma = 66$