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blagie [28]
2 years ago
8

Mrs. Zimmerman’s students build the first letter of their names out of wood. Holly builds an H using rectangles with the dimensi

ons shown.
How many square inches of wood does Holly use to create the letter H?

Answer Choices: A, 44 in.² B, 60 in.² C, 80 in.² D, 120 in.²

Mathematics
1 answer:
svet-max [94.6K]2 years ago
8 0

Answer:

Answer: 80in^2

Step-by-step explanation:

i got it right, so its right...

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The surface area of the cone is 43.75pie cm^2. What is the slant height of the cone and the diameter is 5
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If the diameter of the cone is 5, then the radius of it will be half that, or 2.5, thus

\bf \textit{total surface area of a cone}\\\\
SA=\pi r\stackrel{slant~height}{\sqrt{r^2+h^2}}+\pi r^2~~
\begin{cases}
r=radius\\
h=height\\
------\\
SA=43.75\pi \\
r=2.5
\end{cases}
\\\\\\
43.75\pi =\pi (2.5)\sqrt{r^2+h^2}+\pi (2.5)^2
\\\\\\
43.75\pi -\pi (2.5)^2=2.5\pi \sqrt{r^2+h^2}
\\\\\\
43.75\pi -6.25\pi =2.5\pi \sqrt{r^2+h^2}\implies 37.5\pi =2.5\pi \sqrt{r^2+h^2}
\\\\\\
\cfrac{37.5\pi }{2.5\pi }=\sqrt{r^2+h^2}\implies 15=\sqrt{r^2+h^2}
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