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Tasya [4]
2 years ago
15

help me pls! The radius of Circle A is 7 mm. The radius of Circle B is 5 mm greater than the radius of Circle A. The radius of C

ircle C is 3 mm greater than the radius of Circle B. The radius of Circle D is 2 mm less than the radius of Circle C. What is the area of each circle? How many times greater than the area of Circle A is the area of Circle D?​
Mathematics
1 answer:
bazaltina [42]2 years ago
5 0

Answer:

3.45 times

Step-by-step explanation:

530.93/153.94 = 3.4489411459

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Practice D. Factor each trinomial.
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Answer:

<em>S</em><em>o</em><em> </em><em>1</em><em>)</em><em> </em><em> </em><em>x</em><em>²</em><em>-</em><em>2</em><em>x</em><em>-</em><em>8</em>

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5 0
3 years ago
Based on historical data, your manager believes that 41% of the company's orders come from first-time customers. A random sample
TEA [102]

Answer:

The probability that the sample proportion is between 0.35 and 0.5 is 0.7895

Step-by-step explanation:

To calculate the probability that the sample proportion is between 0.35 and 0.5 we need to know the z-scores of the sample proportions 0.35 and 0.5.

z-score of the sample proportion is calculated as

z=\frac{p(s)-p}{\sqrt{\frac{p*(1-p)}{N} } } where

  • p(s) is the sample proportion of first time customers
  • p is the proportion of first time customers based on historical data
  • N is the sample size

For the sample proportion 0.35:

z(0.35)=\frac{0,35-0.41}{\sqrt{\frac{0.41*0.59}{72} } } ≈ -1.035

For the sample proportion 0.5:

z(0.5)=\frac{0,5-0.41}{\sqrt{\frac{0.41*0.59}{72} } } ≈ 1.553

The probabilities for z of being smaller than these z-scores are:

P(z<z(0.35))= 0.1503

P(z<z(0.5))= 0.9398

Then the probability that the sample proportion is between 0.35 and 0.5 is

P(z(0.35)<z<z(0.5))= 0.9398 - 0.1503 =0.7895

6 0
3 years ago
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------------------------------

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-2 gal/min

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