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3 years ago

Geometry questionnn! Please help :)

Mathematics

1 answer:

Marizza181 [45]3 years ago

4 0

Answer:

8 and 1 third.

Step-by-step explanation:

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Answer:

-3. im taking this course right now so i know its correct, if you do the box method it comes out to -3.

Step-by-step explanation:

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3 years ago

10x is greater than or equal to 120 cm^2

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Answer:

x greater than or equal to 12cm^2

Step-by-step explanation:

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3 years ago

The perimeter of any polygon is the?

Wittaler [7]

Answer:

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3 years ago

A lab is testing the amount of a certain active chemical compound in a particular drug that has been recently developed. The man

Mazyrski [523]

Answer:

The 95% confidence interval is "87.94, 91.86".

Step-by-step explanation:

The given values are:

Sample batches,

n = 25

Sample mean concentration,

$\bar{x}$ = 89.9 mg

Amount of chemical,

σ = 5

α = 0.05

The critical value from Z table will be:

= $Z(\frac{\alpha}{2} )$

= $Z(\frac{0.05}{2} )$

= $1.96$

Now,

The confidence interval will be:

= $\bar{x} \pm Z(\frac{\alpha}{2} )\times \frac{\sigma}{\sqrt{n} }$

On substituting the values, we get

= $89.9 \pm Z(\frac{0.05}{2})\times \frac{5}{\sqrt{25}}$

= $89.9 \pm Z(\frac{0.05}{2})\times \frac{5}{5}$

= $89.9 \pm1.96\times 1$

Lower limit will be:

= $89.9 -1.96\times 1$

= $87.94$

Upper limit will be:

= $89.9 +1.96\times 1$

= $91.86$

7 0

3 years ago