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2 years ago

Need help with 14!!! Please show ur work.My teacher is a Karen soooo yeah! Have a nice day

Mathematics

2 answers:

zvonat [6]2 years ago

8 0

2.5 inches is 15 miles so if it’s 4 inches on the map it would be 27 miles cuz each half inch is 3 miles. 3x9=27

UkoKoshka [18]2 years ago

7 0

Answer:

A) 24 miles

Step-by-step explanation:

15/2.5 = 6 miles per inch

(6)(4) = 24 miles

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Estimate with 2 digit division

Wittaler [7]

What is the numbers?

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2 years ago

Write 350 as a product of primes. Use index notation when giving your answer

Mkey [24]

Answer:

5² x 7 x 2

Step-by-step explanation:

350

= 35 x 10

= 7 x 5 x 5 x 2

= 5² x 7 x 2

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2 years ago

A researcher wishes to estimate, with 9090% confidence, the proportion of adults who have high-speed Internet access. Her es

Sunny_sXe [5.5K]

Answer: a) Required minimum sample size= 219

b) Required minimum sample size= 271

Step-by-step explanation:

As per given , we have

Margin of error : E= 5% =0.05

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

a) Prior estimate of true proportion: p=28%=0.28

Formula to find the sample size :-

$n=p(1-p)(\dfrac{z_{\alpha/2}}{E})^2\\\\=0.28(1-0.28)(\dfrac{1.645}{0.05})^2\\\\=218.213856\approx219$

Required minimum sample size= 219

b) If no estimate of true proportion is given , then we assume p= 0.5

Formula to find the sample size :-

$n=0.5(1-0.5)(\dfrac{z_{\alpha/2}}{E})^2\\\\=0.25(\dfrac{1.645}{0.05})^2\\\\=270.6025\approx271$

Required minimum sample size= 271

8 0

2 years ago

Plz, help ASAP!!!!!!!

Marina86 [1]

Answer: correct.

Step-by-step explanation:

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2 years ago

Raymond can type 40 words each minute. How many words can he type in 8 minutes?

Phantasy [73]

Answer:

320

Step-by-step explanation:

320 words per minute 40x8=320

3 0

2 years ago

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