Answer:
x⁵+ 45x⁴+ 810x³+ 7290x²+ 32805x +59049
Step-by-step explanation:
Greetings !
Given expression
![(x + 9) {}^{5}](https://tex.z-dn.net/?f=%28x%20%2B%209%29%20%7B%7D%5E%7B5%7D%20)
write 5 as a sum
![(x + 9) {}^{3 + 2}](https://tex.z-dn.net/?f=%28x%20%2B%209%29%20%7B%7D%5E%7B3%20%2B%202%7D%20)
![use \: a {}^{m + n} = a {}^{m} \times a {}^{n} to \: expand \: the \: expression.](https://tex.z-dn.net/?f=use%20%5C%3A%20a%20%7B%7D%5E%7Bm%20%2B%20n%7D%20%20%3D%20a%20%7B%7D%5E%7Bm%7D%20%20%5Ctimes%20a%20%7B%7D%5E%7Bn%7D%20to%20%5C%3A%20expand%20%5C%3A%20the%20%5C%3A%20expression.)
![(x + 9) {}^{3} \times (x + 9) {}^{2}](https://tex.z-dn.net/?f=%28x%20%2B%209%29%20%7B%7D%5E%7B3%7D%20%20%5Ctimes%20%28x%20%2B%209%29%20%7B%7D%5E%7B2%7D%20)
Use (a+b)³=a³+3a²b+b³ to expand the expression
![(x {}^{3} + 27x {}^{2} + 243x + 729) \times (x + 9) {}^{2}](https://tex.z-dn.net/?f=%28x%20%7B%7D%5E%7B3%7D%20%20%2B%2027x%20%7B%7D%5E%7B2%7D%20%20%2B%20243x%20%2B%20729%29%20%5Ctimes%20%28x%20%2B%209%29%20%7B%7D%5E%7B2%7D%20)
Use (a+b)²=a²+2ab+b² to the second expression to expand it
![(x {}^{3} + 27x {}^{2} + 243x + 729) \times(x {}^{2} + 18x + 81)](https://tex.z-dn.net/?f=%28x%20%7B%7D%5E%7B3%7D%20%20%2B%2027x%20%7B%7D%5E%7B2%7D%20%20%2B%20243x%20%2B%20729%29%20%5Ctimes%28x%20%7B%7D%5E%7B2%7D%20%20%2B%2018x%20%2B%2081%29)
Finally, simplify the expression gives
![x {}^{5} + 45x {}^{4} + 810x {}^{3} + 7290x {}^{2} + 32805x + 59049](https://tex.z-dn.net/?f=x%20%7B%7D%5E%7B5%7D%20%20%2B%2045x%20%7B%7D%5E%7B4%7D%20%20%2B%20810x%20%7B%7D%5E%7B3%7D%20%20%2B%207290x%20%7B%7D%5E%7B2%7D%20%20%2B%2032805x%20%2B%2059049)
Hope it helps!
I wrote the domain and range in interval notation, not sure if that’s how you’re asked to do it. This is how I was taught to state the domain/range of a graph.
Volume of the cone is 117.5 π ft³
<u>Step-by-step explanation:</u>
Lateral area of the cone = πrs
s is the slant height = 15 ft
From the above formula, we can find the radius as, 5 ft.
Volume of the cone = π r² h/3
s = √ (5²+ h²)
Squaring on both sides, we will get,
s² = 15² = (5² + h²)
15² - 5² = h²
225 - 25 = 200 = h²
h = √200 = 14.1 ft
Volume = π × 5² × 14.1 / 3 = 117.5 π ft³