What is 221,000,000,000,000,000,000 expressed in scientific notation? a.2.21 × 1021 b.2.21E20 c.2.21E21 d.2.21E-20 e.2.21 × 10-2
2 answers:
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Answer:
The number of people needed is
Step-by-step explanation:
From the question we are told that
The population proportion is
The margin of error is
From the question we are told the confidence level is 90% , hence the level of significance is
=>
Generally from the normal distribution table the critical value of is
Generally the sample size is mathematically represented as
=>
=>
Answer:
We can draw a rectangle and a square.
First the square:
The area of a square of sidelength L is:
A = L^2
So if the area of this square must be 6 square units, we get:
6 square units = L^2
L = √(6 square units) = 2.45 units
Now for a rectangle, we know that for a rectangle of length L and width W, the area is:
A = L*W
Now let's give the width a value of 1 unit, then W = 1unit
A = L*1 unit
And we know that the area must be of 6 square units, then:
6 square units = L*1 unit
(6 square units)/(1 unit) = L
(6 units) = L
The drawings (these are not exact ones, i'm doing them with a mouse) of the images can be seen below.
