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3 years ago

A fast typist can type 120 words in 100 seconds. At that rate, how many seconds would it take to type 258 words?

Mathematics

2 answers:

ANTONII [103]3 years ago

5 0

Answer: 120+120+ 18= 258

You know that it takes 100 seconds for 120 words

120=100 120=100 now we have to find now how many seconds does it take to make 18 words

ad-work [718]3 years ago

3 0

Answer:

215 seconds

Step-by-step explanation:

120 words : 100 seconds = 258 words : x seconds

x = 258*100/120 = 258*5/6 = 43*5/1 = 215 seconds

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Answer:

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Step-by-step explanation:

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2 years ago

A random sample of 70 printers discovered that 25 of them were being used in small businesses. find the 95% limit for the popula

kvasek [131]

Answer:

The sample proportion of printers used in small business is:

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The 95% confidence interval for the population proportion of printers that are used in small businesses is:

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$z_{\frac{0.05}{2}}=1.96$ is the critical value at 0.05 significance level

$\therefore 0.3571 \pm 1.96 \sqrt{\frac{0.3571(1-0.3571)}{70} }$

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$\left ( 0.3571 - 0.1122, 0.3571 + 0.1122 \right)$

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