3 years ago

First five common multiples of 7and 20

1 answer:

4 0

The first 5 Multiples of 7 are 35, 70, 105, 140, 175
The first 5 Multiples of 20 are: 20, 40, 60, 80, 100

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Question 18 Item 18 The distribution of the number of moths captured per night by a certain moth trap is approximately normal wi

juin [17]

Answer:

Standard deviation 46.3

Step-by-step explanation:

A 28% of the distribution is equivalent to a z score of -0.5828, you can use a z table to find that.

Z score is calculated as follows:

$z = \frac{x-\mu}{\sigma}$

x is the number being evaluated

μ is the mean

σ is the standard deviation

And it is used to calculate how many standard deviations you are from the mean of the sample.

Replacing with the known information you can calculate the standard deviation:

$\sigma=\frac{x-\mu}{z} =\frac{76-103}{-0.5828}= 46.3$

4 0

3 years ago

Two trays contained 12 ice cubes. How many ice cubes are there in 20 trays?

Masja [62]

If 2 trays have 12, and you need to get 20 trays, find out 2 * x = 20.

2 * 10 = 20.

So you need to multiply the problem by 10

10(2 trays = 12 ice cubes)

20 trays = 120 ice cubes.

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2 years ago

A cell phone company charges a $45 activation fee and $65 per month for their monthly plan. Another cell phone company charges $

Nutka1998 [239]

Whats the question here

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3 years ago

Please help!!

Nastasia [14]

Answer:

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2 years ago

Find the area of the regular 18-gon with radius 11 mm

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Answer:

Step-by-step explanation:

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1 year ago