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2 years ago

According to the graph about _____ of households in Africa owns a computer in 2008.

Mathematics

1 answer:

inna [77]2 years ago

8 0

Answer:

According to the graph about 5 percent of households in Africa owns a computer in 2008.

2013 about 1/3 of all households in Asia had a computer.

The number of households with a computer is increasing in all regions overtime.

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Find the sample size required to achieve the given margin of error with SD = 51.02 and z - score = 1.96. Round your answer to th

coldgirl [10]

Answer:

The sample size required is 2500.

Step-by-step explanation:

z-score:

In function of the margin of error M, the z-score is given by:

$Z = \frac{M}{\frac{\sigma}{\sqrt{n}}} = \frac{M\sqrt{n}}{\sigma}$

In this question, we have that:

$\sigma = 51.02, M = 2, Z = 1.96$

$Z = \frac{M\sqrt{n}}{\sigma}$

$1.96 = \frac{2\sqrt{n}}{51.02}$

$2\sqrt{n} = 51.02*1.96$

$\sqrt{n} = \frac{51.02*1.96}{2}$

$(\sqrt{n})^2 = (\frac{51.02*1.96}{2})^2$

$n = 2500$

The sample size required is 2500.

3 0

3 years ago

Please help me. Its geometry in mathematics.

I am Lyosha [343]

Answer:

(b-10) +(b+10)=180

2b=180

b=90

c=b-10=80

d=b+10=100

3 0

3 years ago

Determine whether a triangle with the given vertices is a scalene, isosceles, or equilateral tri Scalene Isosceles Equilateral t

solniwko [45]

Answer:

(a) isosceles

(b), (c) scalene

Step-by-step explanation:

The lengths of the sides can be found from the distance formula:

d = √((x2 -x1)^2 +(y2 -y1)^2)

Here, there are 9 lengths to be computed, so it is useful to let a spreadsheet or graphing calculator do it.

We find triangle (a) has two sides the same length, so it is isosceles.

The other two triangles have three different side lengths, so they are scalene.

_____

Additional comment

It is impossible to specify an equilateral triangle using rational coordinates.

6 0

2 years ago

What is 76 rounded to the nearest hundred

Citrus2011 [14]

100. When rounding to the hundreds place, you must consider the value of the digit in the tens place. If the digit in the tens place is 5 or greater, the digit in the hundreds place increases by 1. If the digit in the tens place is 4 or less the digit in the hundreds place remains the same. In this case, the number in the hundreds place was originally zero.

3 0

3 years ago

What is the prime factorization of 420?

a_sh-v [17]

we have the factors 2 x 2 x 3 x 5 x 7 = 420. It can also be written in exponential form as 22 x 31 x 51 x 71.

Step-by-step explanation:

6 0

2 years ago

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