3 years ago

PZLZZ ANS SNEJSJDJSWJEJSJSH PLZZZ

1 answer:

8 0

One cubic foot of sand should be $11.25. You can find this answer by dividing the first price by 3, because there are 3 feet in a yard.

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On average, cody runs 4 miles in 38 minutes. How fast should he plan to run a 10-mile race if he maintains this place.

enyata [817]

Answer:

Step-by-step explanation:

10/4=2.5

2.5x38=95

95 minutes= 1 hour 35 minutes

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3 years ago

Floral designers often create arrangements where the flower height to container ratio is 5 to 3. A certain museum wishes to crea

aleksandr82 [10.1K]

Set up a proportion of 5 over 3 and then x over 17
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3 years ago

A researcher wishes to estimate the proportion of X-ray machines that malfunction. A random 275 sample of machines is taken, and

Dominik [7]

Answer:

Following are the solution to the given question:

Step-by-step explanation:

$95\%$ Confidence Interval for both the percentage of all x-ray machines

p = the machinery's share is not working:

$= \frac{228}{275}\\\\ = 0.829$

$\text{Margin of Error} = Z_{(\frac{\alpha}{2})} \times \sqrt{( p \times (1-p)}{n})$

$= 1.96 \times \sqrt{(0.829 \times \frac{0.171}{275})} \\\\= 1.96 \times 0.023 \\\\= 0.045$

Lower $95\%$ Confidence interval = p - error margin $= 0.829 - 0.045 = 0.784$

Upper $95\%$ Confidence Interval = p + error margin $= 0.829 + 0.045 = 0.874$

So, $95\%$ Confidence Interval $= ( 0.78 , 0.87 )$

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2 years ago

Choose the equation that shows a step in the process of completing the square on the given quadratic. y = x^2 + 8x – 3

klasskru [66]

Answer:

y = x^2 + 8x - 3

y = x^2 + 8x + (8/2)^2 - 3 - (8/2)^2

y = x^2 + 8x + 16 - 3 - 16

Step-by-step explanation:

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3 years ago

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stealth61 [152]

Answer:

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Step-by-step explanation:

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2 years ago