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Vitek1552 [10]
3 years ago
8

A circular swimming pool is 21 feet in diameter.What is the circumference of the swimming pool

Mathematics
1 answer:
vazorg [7]3 years ago
6 0

Answer:

65.94 ft.

Step-by-step explanation:

pi*d=C

pi*21=65.94

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lutik1710 [3]

Answer:

Tu vorbesti limba romana! Este foarte cool! Nu am întâlnit niciodată pe cineva care să vorbească română

Step-by-step explanation:

4 0
2 years ago
The weight of a small Starbucks coffee is a normally distributed random variable with a mean of 330 grams and a standard deviati
just olya [345]

Answer:

Weights of at least 340.1 are in the highest 20%.

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 = 330, \sigma = 12

a. Highest 20 percent

At least X

100-20 = 80

So X is the 80th percentile, which is X when Z has a pvalue of 0.8. So X when Z = 0.842.

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

0.842 = \frac{X - 330}{12}

X - 330 = 12*0.842

X = 340.1

Weights of at least 340.1 are in the highest 20%.

3 0
3 years ago
Which ordered pairs in the form (x, y) are solutions to the equation<br><br> 7x−5y=28?
belka [17]

Answer:7x + -5y = -28

(-4, _)

(1, _)

(_, 14)

Step-by-step explanation:

6 0
2 years ago
Solve the system by substitution.<br> y = -9x<br> y = 2x + 33
Gwar [14]

Answer:

y =  - 9x \\ theny = 2x + 33 \\  - 9x = 2x + 33 \\  - 9x - 2x = 33 \\  - 11x = 33 \\ x =  \frac{ - 33}{11}  =  - 3 \\ x =  - 3 \\then\\ y=-9×-3=21\\ thank \: you

5 0
3 years ago
Help! Isosceles, scalene or equilateral
noname [10]

equilateral

Step-by-step explanation:

all of the side lengths are the same along with the angles

3 0
2 years ago
Read 2 more answers
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