See attach. It's too short.<span> Write at least 20 characters to explain it well.</span>
Answer:
254.34 m^2
Step-by-step explanation:
The diameter is 18 so the radius is 1/2 of the diameter
The radius is 9
The area of the circle
A = pi r^2
= 3.14 (9) ^2
254.34 m^2
We know that a square root is a number that when multiplied by itself, makes a certain number. That sounds vague, but you probably have some intuition about this concept. You may realize that the square root of 9, for example, is 3, because 3 times 3 is 9. But -3 is also a square root of 9. Indeed, -3 times -3 is 9.
Now this is an interesting property. These two numbers both make positive 9. But what about -9? What number multiplied by itself gives -9?
You may recall that the product of two positive numbers is positive, and that the product of two negative numbers is also positive. The square root, by definition, requires that the number times itself equals its square, so we can't have two numbers of different signs. Thus, you can't "really" have the square root of a negative number.
But some clever mathematicians—Euler and Gauss—didn't accept this dogma. They defined our familiar numbers as "real" numbers, denoted ℝ, and made a new set of num
bers. These are called "imaginary" numbers (no joke), whose set of numbers are sometimes denoted ℂ (there's a bit more nuance to this definition). The imaginary numbers allow you to have a square root for a negative number. They are defined such that
, or
. This has opened up an unbelievable number of pathways in mathematics, but I'm sure you'll learn about it in due time. :)
Answer:
I'd use a Non-probability Sampling Method.
Explanation:
The question is already laced with criteria - Heights of Buildings in New York.
This means that there are certain buildings that won't fit in the sample. In a non-probability sample, objects or subjects are elected based on specified criteria that are not random. This means that not all objects/subject have a c<em>hance</em> of being included in the sample.
It is assumed that the question/assignment centers around high rise buildings.
Therefore, one storey buildings and bungalows that are within and outside New York will not be included in the sample.
Under the Non-Probability Sampling Method, it is essential to note that there are other subgroupings of sampling techniques. They are:
- Convenience Sample
- Voluntary Sample
- Purposive Sample
- Snowball Sample
Cheers!
The units of the initial and final rates of speed are;
<u><em>Initial rate of Speed = ft/hr</em></u>
<u><em>Final rate of speed = mi/min</em></u>
- We are told that the conversion factors he used are;
5280 ft/1 mi and 1 hr/60 min
- Now, the meaning of 5280 ft/1 mi denotes that;
5280 ft mile is equivalent to 1 mile
This means that the initial distance <em>unit </em>used was ft while the final one was mile
Also, 1 hr/60 min denotes that;
1 hour is equivalent to 60 minutes.
This means that the initial time units used was hour while the final one was minute.
- In conclusion, since we know the initial time and distance units used, we can say that the initial rate of speed ft/hr while final speed rate was miles/minutes.
Read more at; brainly.com/question/17734333