Could someone please help? (Question on image)

Question

kaioken360 · Answer

attachment

directrix · Answer

If you will solve this equation for x and post the answer, then I will help you complete the problem.

5^2  +  12^2  =  x^2

We need x for the slant height of the cone.

@kaioken360

563blackghost · Answer

Like @Directrix said we would find the slant height...

$\Huge{5^{2}+12^{2}=c^{2}}$ Simplify...

$\Huge\color{orange}{25+144=c^{2}}$ Add....

$\Huge\color{green}{169=c^{2}}$ Now we need square root 169...

$\Huge\color{red}{\sqrt{169}=c}$ What is c?

kaioken360 · Answer

338?

563blackghost · Answer

Incorrect....we need to find a number that multiples itself to equal 169 so it can not be bigger then the number....

jdoe0001 · Answer

hint:  $\textit{surface area of a cone}=\pi r\sqrt{r^2+h^2}+\pi r^2\qquad 
\begin{cases}
r=radius\
h=height
\end{cases}$

kaioken360 · Answer

13

directrix · Answer

I had in mind for the OP to find the slant height.

Then, use the formula TA = pi * r * L = pi * r^2 where L is the slant height.

directrix · Answer

13 is correct for the slant height