Answer:
Step-by-step explanation:
Hi there,
To get started, recall the area of a bound circle formula:
where r is radius of the circle. However, Juan used an approximate value of π, 3.14. So for our purposes, the formula becomes:
![(3.14)r^{2}](https://tex.z-dn.net/?f=%283.14%29r%5E%7B2%7D)
Juan measured the circle's <em>diameter</em>, so we can find radius from diameter first. Radius is simply twice the length of the diameter; from one circle endpoint to the center, to the endpoint across, making a straight line:
⇒ ![r=\frac{d}{2} = \frac{5 \ cm}{2} = 2.5 \ cm](https://tex.z-dn.net/?f=r%3D%5Cfrac%7Bd%7D%7B2%7D%20%3D%20%5Cfrac%7B5%20%5C%20cm%7D%7B2%7D%20%20%3D%202.5%20%5C%20cm)
Now plug in to obtain area:
![A = (3.14)(2.5 cm)^{2} =19.625 \ cm^{2}](https://tex.z-dn.net/?f=A%20%3D%20%283.14%29%282.5%20cm%29%5E%7B2%7D%20%3D19.625%20%5C%20cm%5E%7B2%7D)
The area is 19.265 centimetres squared.
Cross-sections are the area shapes when you cut through a 3D volume; if you cut through a pipe perpendicular to where it flows, you can see it is a circle! If you cut straight through a cube, it would be a square, etc.
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thanks,
Answer:
Step-by-step explanation:
Definition : The expression that can have constants (like 4), variables (like x or y) and exponents (like the 2 in
), that can be combined using addition, subtraction, multiplication and division, but no division by a variable and a variable's exponents can only be 0,1,2,3,... etc. and it can't have an infinite number of terms.
1. 6 + p
Being p be a variable this equation is polynomial
2. x – 1
Since x-1 has variable and constant so according to definition it is a polynomial
3. 8x−z3
According to definition it is a polynomial
4 .![5x^{2}-x\sqrt{}](https://tex.z-dn.net/?f=5x%5E%7B2%7D-x%5Csqrt%7B%7D)
Since has root so it is not a polynomial .
Every function pairs HAS EXACTLY ONE output value with one input value.
A function is defined as a relation wherein one variable specifies a single value of another value. Function pairs is composed of an input and an output.
Step-by-step explanation:
10. 8a - 12b
11. d^8
12. 3y^3
13. 4a+b
14. 11x-3
15. 2a^2+2ab
16. 2x^3+x
17. 4(a+2)
18. 3m(m-3)