2 years ago

Calcula el área lateral total de una pirámide hexagonal de 16 cm de arista básica y 28 cm de arista lateral

Mathematics

1 answer:

JulsSmile [24]2 years ago

3 0

Answer:

Srry I need points to see answers :(

Step-by-step explanation:

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3 years ago

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Eva8 [605]

Answer:

Step-by-step explanation:

Tear this apart piece by piece

15 - 8 = 7

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2 years ago

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A limnologist wishes to estimate the mean phosphate content per unit volume of lake water. It is knownfrom studies in previous y

telo118 [61]

Answer: 68

Step-by-step explanation:

As per given , we have

Population standard deviation : $\sigma=4$

Critical value for 90% confidence interval = $z_{\alpha/2}=1.645$

Margin of error : E= 0.8 milligrams

The formula to find the sample size is given by :-

$n=(\dfrac{z_{\alpha/2}\ \sigma}{E})^2$

i.e. $n=(\dfrac{(1.645)(4)}{0.8})^2=(8.225)^2$

$=67.650625\approx68$

Hence, the limnologist must analyze 68 samples.

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3 years ago