Answer:
13. [tex]36a^2b^4[/tex]π
14. [tex]16x^3y^4[/tex]π
15. [tex]-\frac{c^3}{4a^7b^3}[/tex]
Step-by-step explanation:
13.
A = π * [tex]r^2[/tex]
r = [tex]6ab^2[/tex]
A = π* [tex](6ab^2)^2[/tex]
A = π * [tex](6ab^2)(6ab^2)[/tex]
A = π * [tex]36a^2b^4[/tex]
A = [tex]36a^2b^4[/tex]π
14.
V = π * [tex]r^2[/tex] * h
r = [tex]2x[/tex]
h = [tex]4xy^4[/tex]
V = π * [tex](2x)^2[/tex] * [tex]4xy^4[/tex]
V = π * [tex]4x^2[/tex] * [tex]4xy^4[/tex]
V = π * [tex]16x^3y^4[/tex]
V = [tex]16x^3y^4[/tex]π
15. [tex]\frac{3a^{-4}b^2}{-12a^3b^5c^{-3}}[/tex] = [tex]-\frac{c^3}{4a^7b^3}[/tex]
[tex]\frac{3a^{-4}b^2}{-12a^3b^5c^{-3}}[/tex]
[tex]\frac{a^{-4}}{-4a^3b^5c^{-3}}[/tex]
[tex]\frac{b^2}{-4^{3+4}b^5c^{-3}}[/tex]
[tex]\frac{b^2}{-4^7b^5c^{-3}}[/tex]
[tex]\frac{1}{-4a^7b^{5-2}c^{-3}}[/tex]
[tex]\frac{1}{-4a^7b^3c^{-3}}[/tex]
[tex]\frac{c^3}{-4a^7b^3}[/tex]
[tex]-\frac{c^3}{4a^7b^3}[/tex]
Hope this helps!
