3 years ago

Please Help!

Mathematics

1 answer:

nikklg [1K]3 years ago

7 0

Answer:

12.6 miles every hour

Step-by-step explanation:

113.4 divide by 9 equals 12.6 so 12.6 times 9 hours equals 113.4 this is so easy its 4 grade work i am in 8th

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Short=5 hypotenuse=10 long=

Leviafan [203]

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3 years ago

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What is the equation of the line in the graph

earnstyle [38]

b = - 4

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3 years ago

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 = $z_{\alpha/2}=1.645$

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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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