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3 years ago

9 ft =_________in. How many inches????

Mathematics

1 answer:

lys-0071 [83]3 years ago

4 0

108 inches

hope this helped <3

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55. f(x) = x + 2; (1, -3)

Tems11 [23]

Answer:

F(x) = 3

Step-by-step explanation:

Just substitute x with 1 and you add it with 2 and your answer is three

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3 years ago

The height of a sunflower increases from 82 cm to 1 metre in a week. Find the percentage increase in height.

vichka [17]

So, the sunflower is increasing from .82 meters to 1 meter. This is a .18 meter increase. We need to figure out what percent of 82 18 is. We do this by dividing 18 by 82 and multiply the result by 100 to get a percent. This equals 21.95%

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3 years ago

There are 15 vacant units in Noor's apartment building. This represents 6% of the total number of units. How many units are in N

MaRussiya [10]

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3 years ago

Sid picks apples at the rate of 8 apples every minute how many apples would he pick in 17 minutes

Zepler [3.9K]

Answer:

<h2>136 Apples.</h2>

Step-by-step explanation:

8 apples = 1 minute

For every minute, 8 apples are picked

8 x 17 = 136

^ ^

Apples Minutes

<em>I hope this helped you!</em>

8 0

4 years ago

Read 2 more answers

Find the minimum sample size necessary to be 99% confident that the population mean is within 3 units of the sample mean given t

olga55 [171]

Answer:

623

Step-by-step explanation:

Given that margin of error (E) = 3 unit, standard deviation (σ) = 29, sample size (n) = ?

a) The confidence (C) = 99% = 0.99

α = 1 - C = 1 - 0.99 = 0.01

α/2 = 0.01 / 2 = 0.005

From the normal distribution table, The z score of α/2 (0.005) is the critical value and it corresponds to the z score 0.495 (0.5 - 0.005) which is 2.58.

$critical\ value = z_{\frac{\alpha}{2} }=z_{0.005}=2.58\\$

b) The margin of error (E) is given as:

<h3> $E=z_{\frac{\alpha}{2} }*\frac{\sigma}{\sqrt{n} }\\\\\sqrt{n}= z_{\frac{\alpha}{2} }*\frac{\sigma}{E }\\ \\n=( z_{\frac{\alpha}{2} }*\frac{\sigma}{E })^2\\\\Substituting:\\\\n=(2.58*\frac{29}{3} )^2=622.0036\\\\\\n=623(to\ the \ next\ whole\ number)$ </h3>

The minimum sample size (n) is 623

3 0

4 years ago