2 years ago

If there are 205 students in the school, which is the best estimate of the number of students that are in the 5th grade?

Mathematics

1 answer:

Mila [183]2 years ago

8 0

Answer:

34 people

Step-by-step explanation:

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I need help for B,3,4

frosja888 [35]

Idk b but 3 is because they are the same distance away from 0 and idk how to explain 4

6 0

3 years ago

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The manager of a warehouse would like to know how many errors are made when a product's serial number is read by a bar-code read

Bond [772]

Answer:

$(a)\ \bar x =20.5$

$(b)\ \sigma = 14.54$

Step-by-step explanation:

Given

$x: 36, 14, 21, 39, 11, 2$

Solving (a): The mean of the 6 samples.

This is calculated as:

$\bar x = \frac{\sum x}{n}$

So, we have:

$\bar x =\frac{36+ 14+ 21+ 39+ 11+ 2}{6}$

$\bar x =\frac{123}{6}$

$\bar x =20.5$

Solving (b): The sample standard deviation.

This is calculated using:

$\sigma = \sqrt{\frac{\sum(x - \bar x)^2}{n-1}}$

So, we have:

$\sigma = \sqrt{\frac{(36 - 20.5)^2 + (14 - 20.5)^2 + (21 - 20.5)^2 + (39 - 20.5)^2 + (11 - 20.5)^2 + (2 - 20.5)^2}{6-1}}$

$\sigma = \sqrt{\frac{1057.5}{5}}$

$\sigma = \sqrt{211.5}$

$\sigma = 14.54$

7 0

2 years ago

amber saved a total of $3.20 over 5 weeks.she saved the same amount of money each week.how much money did Amber save each week?

mylen [45]

She saved 64 cents each week since you would simply divide the money by 5 weeks to get the amount of money she gets per week

3 0

3 years ago

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Write the equation of the line in standard form passing through (2,-4) with a slope of -7

otez555 [7]

Answer:

7x+Y=-2

Step-by-step explanation:

(y-y1)=m(x-x1)

(Y+4)=-7(x-2)

Y+4=-7x+2

Y+7x=2-4

7x+Y=-2

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2 years ago

A single die is rolled. Find the probability of each of the following events :

IceJOKER [234]

$\frac{1}{2}$ and $\frac{1}{3}$

There are 6 possible outcomes when rolling a die, 1, 2, 3, 4 , 5, 6

numbers less than 4 are 1, 2, 3

P( number less than 4 ) = $\frac{3}{6}$ = $\frac{1}{2}$

numbers greater than 4 are 5, 6

P( number greater than 4 ) = $\frac{2}{6}$ = $\frac{1}{3}$

7 0

2 years ago