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3 years ago

Please help me hurry!! 8

Mathematics

2 answers:

tiny-mole [99]3 years ago

7 0

Answer:

r = 7

Step-by-step explanation:

$a =5\\\\a_{3}=245\\\\a_{n}=ar^{n-1}\\\\a_{3}= 5*r^{2} \\\\5*r^{2} = 245\\\\r^{2}=\frac{245}{5}\\\\r^{2}=49 = 7^{2}\\\\r = 7$

hichkok12 [17]3 years ago

5 0

R=7

Explanation I just calculate it

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What is 12a =? Talking about Math :/

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Answer: 12a=48

Step-by-step explanation:

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An environmental group at a local college is conducting independent tests to determine the distance a particular make of automob

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Answer:

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Step-by-step explanation:

<u>Confidence Interval</u>

When the population standard deviation $\sigma$ is known, the formula for a confidence interval for a population mean $\bar x$ is:

$\displaystyle \bar x \pm z\frac{\sigma}{\sqrt{n}}$

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Or, equivalently

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Step-by-step explanation:

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